From cdeab33c2018d693442f4c290fa61e7ad879d43a Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Mon, 3 Feb 2020 18:43:29 +0530
Subject: [PATCH 01/14] Login as guest feature

Entering a empty string for private Key now automatically generated a random key and logins as guest
---
 standard_Operations.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index 1a2a1e1..d3470db 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8600,7 +8600,7 @@ Bitcoin.Util = {
                                 try{
                                     var privKey = floDapps.util.privKeyInput();
                                     if(!privKey)
-                                        return reject("Empty Private Key")
+                                        privKey = floCrypto.generateNewID().privKey
                                     var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(privKey))
                                     console.log(floID)
                                 }catch(error){

From 7a6a2dc9ea6e0589408db45096d36f4c20a7ff62 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Thu, 6 Feb 2020 13:38:09 +0530
Subject: [PATCH 02/14] Custom privKeyInput is made promisified

privKeyInput now uses given key when resolved and generates random key when rejected
---
 standard_Operations.html | 57 ++++++++++++++++++++++++----------------
 1 file changed, 34 insertions(+), 23 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index d3470db..3652b9d 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8490,8 +8490,13 @@ Bitcoin.Util = {
             },
             
             privKeyInput: function(){
-                var privKey = prompt("Enter Private Key: ")
-                return privKey
+                return new Promise((resolve, reject) => {
+                    var privKey = prompt("Enter Private Key: ")
+                    if(privKey === null)
+                        reject(null)
+                    else
+                        resolve(privKey)
+                })
             },
 
             startUpFunctions:{
@@ -8597,27 +8602,33 @@ Bitcoin.Util = {
                                     .then(result => resolve(result))
                                     .catch(error => reject(error))
                             }else{
-                                try{
-                                    var privKey = floDapps.util.privKeyInput();
-                                    if(!privKey)
-                                        privKey = floCrypto.generateNewID().privKey
-                                    var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(privKey))
-                                    console.log(floID)
-                                }catch(error){
-                                    console.error(error)
-                                    return reject("Invalid Private Key")
-                                }
-                                var threshold = floCrypto.randInt(10,20)
-                                writeSharesToIDB(floCrypto.createShamirsSecretShares(privKey, threshold, threshold)).then(resultIndexes =>{
-                                    //store index keys in localStorage
-                                    localStorage.setItem(`${floGlobals.application}#privKey`, JSON.stringify(resultIndexes))
-                                    //also add a dummy privatekey to the IDB
-                                    var randomPrivKey = floCrypto.generateNewID().privKey
-                                    var randomThreshold = floCrypto.randInt(10,20)
-                                    writeSharesToIDB(floCrypto.createShamirsSecretShares(randomPrivKey, randomThreshold, randomThreshold))
-                                    //resolve private Key
-                                    resolve(privKey)
-                                }).catch(error => reject(error))
+                                var privKey;
+                                floDapps.util.privKeyInput().then(result => {
+                                    try{
+                                        if(!result)
+                                            return reject("Empty Private Key")
+                                        var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(result))
+                                        console.log(floID)
+                                    }catch(error){
+                                        console.error(error)
+                                        return reject("Invalid Private Key")
+                                    }
+                                }).catch(error => {
+                                    console.log(error, "Generating Random Keys")
+                                    privKey = floCrypto.generateNewID().privKey
+                                }).finally(_ => {
+                                    var threshold = floCrypto.randInt(10,20)
+                                    writeSharesToIDB(floCrypto.createShamirsSecretShares(privKey, threshold, threshold)).then(resultIndexes =>{
+                                        //store index keys in localStorage
+                                        localStorage.setItem(`${floGlobals.application}#privKey`, JSON.stringify(resultIndexes))
+                                        //also add a dummy privatekey to the IDB
+                                        var randomPrivKey = floCrypto.generateNewID().privKey
+                                        var randomThreshold = floCrypto.randInt(10,20)
+                                        writeSharesToIDB(floCrypto.createShamirsSecretShares(randomPrivKey, randomThreshold, randomThreshold))
+                                        //resolve private Key
+                                        resolve(privKey)
+                                    }).catch(error => reject(error))
+                                })
                             }
                         })
                     }

From c3a51f44a7c9ad38476fbb4d6443a7cd54b409ed Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Thu, 6 Feb 2020 14:56:12 +0530
Subject: [PATCH 03/14] bug fix

---
 standard_Operations.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index 3652b9d..07725d5 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8608,7 +8608,7 @@ Bitcoin.Util = {
                                         if(!result)
                                             return reject("Empty Private Key")
                                         var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(result))
-                                        console.log(floID)
+                                        privKey = result
                                     }catch(error){
                                         console.error(error)
                                         return reject("Invalid Private Key")

From 86ea714139df968911e9424740013e3f2df3480d Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sun, 16 Feb 2020 02:34:58 +0530
Subject: [PATCH 04/14] adding manage subAdmin to floDapps

floDapps.manageSubAdmins() allows the user to add and/or remove subadmin list via blockchain
*Requires Admin Privatekey of the app
---
 standard_Operations.html | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/standard_Operations.html b/standard_Operations.html
index 07725d5..54c8909 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8696,6 +8696,26 @@ Bitcoin.Util = {
             this.util.appObs = appObs
         },
         
+        manageSubAdmins(adminPrivKey, addList, rmList){
+            return new Promise((resolve, reject) => {
+                if(!Array.isArray(addList)) addList = undefined;
+                if(!Array.isArray(rmList)) rmList = undefined;
+                var floData = {
+                    [floGlobals.application] : {
+                        addSubAdmin : addList,
+                        removeSubAdmin: rmList,
+                    }
+                }
+                var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(adminPrivKey))
+                if(floID != floGlobals.adminID)
+                    reject('Access Denied for Admin privilege')
+                else
+                    floBlockchainAPI.writeData(floID, JSON.stringify(floData), adminPrivKey)
+                        .then(result => resolve(['Updated SubAdmin List', result]))
+                        .catch(error => reject(error))
+            })
+        },
+
         clearCredentials: function(){
             var indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
             if(!indexArr)

From d6c4b4882e3b1b7b32962941f55b713198dca53a Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sun, 16 Feb 2020 02:36:35 +0530
Subject: [PATCH 05/14] changing TEST_MODE adminID

---
 standard_Operations.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index 54c8909..96b1fe7 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -16,7 +16,7 @@
       FLO: ['https://explorer.mediciland.com/', 'https://livenet.flocha.in/', 'https://flosight.duckdns.org/', 'http://livenet-explorer.floexperiments.com/'],
       FLO_TEST: ['https://testnet-flosight.duckdns.org/', 'https://testnet.flocha.in/']
     },
-    adminID: "FMeiptdJNtYQEtzyYAVNP8fjsDJ1i4EPfE",
+    adminID: "FKAEdnPfjXLHSYwrXQu377ugN4tXU7VGdf",
     sendAmt: 0.001,
     fee: 0.0005,
 

From 47ca6a802e6c6ecf6eab04cb92f542d30469f544 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sun, 16 Feb 2020 02:38:51 +0530
Subject: [PATCH 06/14] moving onloadStartup to a seperate script tag

---
 standard_Operations.html | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index 96b1fe7..b89f82c 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8752,7 +8752,8 @@ Bitcoin.Util = {
 
     reactor.registerEvent("startUpErrorLog");
     reactor.addEventListener("startUpErrorLog", log => console.error(log))
-
+</script>
+<script id="onLoadStartUp">
     function onLoadStartUp() {
 
         //floDapps.addStartUpFunction('Sample', Promised Function)

From 8652959e54bba09554fb62dc4e77363ed56c08dd Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Wed, 4 Mar 2020 03:45:50 +0530
Subject: [PATCH 07/14] floCrypto: errorHanding

errorHanding added to floCrypto.getPubKeyHex and floCrypto.getFloIDfromPubkeyHex
---
 standard_Operations.html | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index b89f82c..cd8b871 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -7214,7 +7214,7 @@ Bitcoin.Util = {
     getPubKeyHex: function (privateKeyHex) {
       var key = new Bitcoin.ECKey(privateKeyHex);
       if (key.priv == null) {
-        alert("Invalid Private key");
+        console.error("Invalid Private key");
         return;
       }
       key.setCompressed(true);
@@ -7224,9 +7224,13 @@ Bitcoin.Util = {
 
     //Returns flo-ID from public-key
     getFloIDfromPubkeyHex: function (pubkeyHex) {
-      var key = new Bitcoin.ECKey().setPub(pubkeyHex);
-      var floID = key.getBitcoinAddress();
-      return floID;
+      try{
+        var key = new Bitcoin.ECKey().setPub(pubkeyHex);
+        var floID = key.getBitcoinAddress();
+        return floID;
+      }catch (e) {
+        console.error(e);
+      }
     },
 
     //Verify the private-key for the given public-key or flo-ID

From 3d0c8883b7b24060b0baced4b29ad19e8ec3658f Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Tue, 10 Mar 2020 22:00:56 +0530
Subject: [PATCH 08/14] Improved floCloudAPI

floCloudAPI now stores the lastCommit value of the objects via requestObjectData, resetObjectData, updateObjectData

resetObjectData and updateObjectData now takes the new and old value from floGlobals.appObjects and lastCommit respectively

Parameter changes:
resetObjectData: function(objectName, options = {})
updateObjectData: function(objectName, options = {})
---
 standard_Operations.html | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index cd8b871..bdb2b5d 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8286,6 +8286,9 @@ Bitcoin.Util = {
     const floCloudAPI = {
 
         util:{
+
+            lastCommit: {},
+
             resetData: function(dataSet){
                 try{
                     dataSet = JSON.parse(dataSet);
@@ -8420,6 +8423,7 @@ Bitcoin.Util = {
                     request.mostRecent = false
                     floSupernode.requestData(JSON.stringify(request), request.receiverID).then(dataSet => {
                         this.util.updateData(dataSet)
+                        this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
                         resolve('Object Data Updated')
                     }).catch(error => reject(error))
                 }).catch(error => reject(error))
@@ -8427,32 +8431,34 @@ Bitcoin.Util = {
         },
 
         //reset or initialize an object and send it to cloud
-        resetObjectData: function(newObject, objectName, options = {}){
+        resetObjectData: function(objectName, options = {}){
             return new Promise((resolve,reject) => {
                 var message = {
                     division: options.division || floGlobals.division, 
                     object: objectName, 
                     vectorClock: floGlobals.vectorClock[objectName], 
-                    reset: newObject
+                    reset: floGlobals.appObjects[objectName]
                 }
-                this.sendApplicationData(message, `${objectName}@Reset`, options)
-                    .then(result => resolve(result))
-                    .catch(error => reject(error))
+                this.sendApplicationData(message, `${objectName}@Reset`, options).then(result => {
+                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
+                    resolve(result)
+                }).catch(error => reject(error))
             })
         },
 
         //update the diff and send it to cloud
-        updateObjectData: function(oldObject, newObject, objectName, options = {}){
+        updateObjectData: function(objectName, options = {}){
             return new Promise((resolve,reject) => {
                 var message = {
                     division: options.division || floGlobals.division,
                     object: objectName, 
                     vectorClock: floGlobals.vectorClock[objectName],
-                    diff: findDifference(oldObject, newObject)
+                    diff: findDifference(JSON.parse(this.util.lastCommit[objectName]), floGlobals.appObjects[objectName])
                 }
-                this.sendApplicationData(message, `${objectName}@Update`, options)
-                    .then(result => resolve(result))
-                    .catch(error => reject(error))
+                this.sendApplicationData(message, `${objectName}@Update`, options).then(result => {
+                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
+                    resolve(result)
+                }).catch(error => reject(error))
             })
         }
     }

From 0a6fb69349282b2f525639272aab69ae56fee746 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Thu, 23 Apr 2020 21:16:54 +0530
Subject: [PATCH 09/14] Beautify the scripts

---
 standard_Operations.html | 2851 ++++++++++++++++++++------------------
 1 file changed, 1469 insertions(+), 1382 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index bdb2b5d..4ed3dc4 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -5,33 +5,35 @@
   <title>FLO Standard Operators</title>
 
 <script id="floGlobals">
-  /* Constants for FLO blockchain operations !!Make sure to add this at begining!! */
-  const floGlobals = {
+    /* Constants for FLO blockchain operations !!Make sure to add this at begining!! */
+    const floGlobals = {
 
-    //Required for all
-    blockchain: "FLO",
+        //Required for all
+        blockchain: "FLO",
 
-    //Required for blockchain API operators
-    apiURL: {
-      FLO: ['https://explorer.mediciland.com/', 'https://livenet.flocha.in/', 'https://flosight.duckdns.org/', 'http://livenet-explorer.floexperiments.com/'],
-      FLO_TEST: ['https://testnet-flosight.duckdns.org/', 'https://testnet.flocha.in/']
-    },
-    adminID: "FKAEdnPfjXLHSYwrXQu377ugN4tXU7VGdf",
-    sendAmt: 0.001,
-    fee: 0.0005,
+        //Required for blockchain API operators
+        apiURL: {
+            FLO: ['https://explorer.mediciland.com/', 'https://livenet.flocha.in/', 'https://flosight.duckdns.org/',
+                'http://livenet-explorer.floexperiments.com/'
+            ],
+            FLO_TEST: ['https://testnet-flosight.duckdns.org/', 'https://testnet.flocha.in/']
+        },
+        adminID: "FKAEdnPfjXLHSYwrXQu377ugN4tXU7VGdf",
+        sendAmt: 0.001,
+        fee: 0.0005,
 
-    //Required for Supernode operations
-    SNStorageID: "FEzk75EGMPEQMrCuPosGiwuK162hcEu49E",
-    supernodes: {}, //each supnernode must be stored as floID : {uri:<uri>,pubKey:<publicKey>}
+        //Required for Supernode operations
+        SNStorageID: "FEzk75EGMPEQMrCuPosGiwuK162hcEu49E",
+        supernodes: {}, //each supnernode must be stored as floID : {uri:<uri>,pubKey:<publicKey>}
 
-    //for cloud apps
-    subAdmins: [],
-    application: "TEST_MODE",
-    vectorClock: {},
-    appObjects: {},
-    generalData: {},
-    generalVC: {}
-  }
+        //for cloud apps
+        subAdmins: [],
+        application: "TEST_MODE",
+        vectorClock: {},
+        appObjects: {},
+        generalData: {},
+        generalVC: {}
+    }
 </script>
 
 </head>
@@ -7017,1342 +7019,1373 @@ Bitcoin.Util = {
 </script>
 
 <script id="floCrypto">
-  /* FLO Crypto Operators*/
-  const floCrypto = {
+    /* FLO Crypto Operators*/
+    const floCrypto = {
 
-    util:{
-        p: BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", 16),
+        util: {
+            p: BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", 16),
 
-        ecparams: EllipticCurve.getSECCurveByName("secp256k1"),
+            ecparams: EllipticCurve.getSECCurveByName("secp256k1"),
 
-        exponent1: function () {
-            return this.p.add(BigInteger.ONE).divide(BigInteger("4"))
-        },
+            exponent1: function () {
+                return this.p.add(BigInteger.ONE).divide(BigInteger("4"))
+            },
 
-        calculateY: function (x) {
-            let p = this.p;
-            let exp = this.exponent1();
-            // x is x value of public key in BigInteger format without 02 or 03 or 04 prefix
-            return x.modPow(BigInteger("3"), p).add(BigInteger("7")).mod(p).modPow(exp, p)
-        },
-        getUncompressedPublicKey: function (compressedPublicKey) {
-            const p = this.p;
-            // Fetch x from compressedPublicKey
-            let pubKeyBytes = Crypto.util.hexToBytes(compressedPublicKey);
-            const prefix = pubKeyBytes.shift() // remove prefix
-            let prefix_modulus = prefix % 2;
-            pubKeyBytes.unshift(0) // add prefix 0
-            let x = new BigInteger(pubKeyBytes)
-            let xDecimalValue = x.toString()
-            // Fetch y
-            let y = this.calculateY(x);
-            let yDecimalValue = y.toString();
-            // verify y value
-            let resultBigInt = y.mod(BigInteger("2"));
-            let check = resultBigInt.toString() % 2;
-            if (prefix_modulus !== check) {
-                yDecimalValue = y.negate().mod(p).toString();
+            calculateY: function (x) {
+                let p = this.p;
+                let exp = this.exponent1();
+                // x is x value of public key in BigInteger format without 02 or 03 or 04 prefix
+                return x.modPow(BigInteger("3"), p).add(BigInteger("7")).mod(p).modPow(exp, p)
+            },
+            getUncompressedPublicKey: function (compressedPublicKey) {
+                const p = this.p;
+                // Fetch x from compressedPublicKey
+                let pubKeyBytes = Crypto.util.hexToBytes(compressedPublicKey);
+                const prefix = pubKeyBytes.shift() // remove prefix
+                let prefix_modulus = prefix % 2;
+                pubKeyBytes.unshift(0) // add prefix 0
+                let x = new BigInteger(pubKeyBytes)
+                let xDecimalValue = x.toString()
+                // Fetch y
+                let y = this.calculateY(x);
+                let yDecimalValue = y.toString();
+                // verify y value
+                let resultBigInt = y.mod(BigInteger("2"));
+                let check = resultBigInt.toString() % 2;
+                if (prefix_modulus !== check) {
+                    yDecimalValue = y.negate().mod(p).toString();
+                }
+                return {
+                    x: xDecimalValue,
+                    y: yDecimalValue
+                };
+            },
+
+            getSenderPublicKeyString: function () {
+                privateKey = ellipticCurveEncryption.senderRandom();
+                senderPublicKeyString = ellipticCurveEncryption.senderPublicString(privateKey);
+                return {
+                    privateKey: privateKey,
+                    senderPublicKeyString: senderPublicKeyString
+                }
+            },
+
+            deriveSharedKeySender: function (receiverCompressedPublicKey, senderPrivateKey) {
+                try {
+                    let receiverPublicKeyString = this.getUncompressedPublicKey(receiverCompressedPublicKey);
+                    var senderDerivedKey = ellipticCurveEncryption.senderSharedKeyDerivation(
+                        receiverPublicKeyString.x, receiverPublicKeyString.y, senderPrivateKey);
+                    return senderDerivedKey;
+                } catch (error) {
+                    return new Error(error);
+                }
+            },
+
+            deriveReceiverSharedKey: function (senderPublicKeyString, receiverPrivateKey) {
+                return ellipticCurveEncryption.receiverSharedKeyDerivation(
+                    senderPublicKeyString.XValuePublicString, senderPublicKeyString.YValuePublicString,
+                    receiverPrivateKey);
+            },
+
+            getReceiverPublicKeyString: function (privateKey) {
+                return ellipticCurveEncryption.receiverPublicString(privateKey);
+            },
+
+            deriveSharedKeyReceiver: function (senderPublicKeyString, receiverPrivateKey) {
+                try {
+                    return ellipticCurveEncryption.receiverSharedKeyDerivation(senderPublicKeyString
+                        .XValuePublicString,
+                        senderPublicKeyString.YValuePublicString, receiverPrivateKey);
+
+                } catch (error) {
+                    return new Error(error);
+                }
+            },
+
+            wifToDecimal: function (pk_wif, isPubKeyCompressed = false) {
+                let pk = Bitcoin.Base58.decode(pk_wif)
+                pk.shift()
+                pk.splice(-4, 4)
+                //If the private key corresponded to a compressed public key, also drop the last byte (it should be 0x01).
+                if (isPubKeyCompressed == true) pk.pop()
+                pk.unshift(0)
+                privateKeyDecimal = BigInteger(pk).toString()
+                privateKeyHex = Crypto.util.bytesToHex(pk)
+                return {
+                    privateKeyDecimal: privateKeyDecimal,
+                    privateKeyHex: privateKeyHex
+                }
             }
+        },
+
+        //generate a random Interger within range
+        randInt: function (min, max) {
+            min = Math.ceil(min);
+            max = Math.floor(max);
+            return Math.floor(Math.random() * (max - min + 1)) + min;
+        },
+
+        //generate a random String within length (options : alphaNumeric chars only)
+        randString: function (length, alphaNumeric = false) {
+            var result = '';
+            if (alphaNumeric)
+                var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+            else
+                var characters =
+                    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_+-./*?@#&$<>=[]{}():';
+            for (var i = 0; i < length; i++)
+                result += characters.charAt(Math.floor(Math.random() * characters.length));
+            return result;
+        },
+
+        //Encrypt Data using public-key
+        encryptData: function (data, receiverCompressedPublicKey) {
+            var senderECKeyData = this.util.getSenderPublicKeyString();
+            var senderDerivedKey = this.util.deriveSharedKeySender(receiverCompressedPublicKey, senderECKeyData
+                .privateKey);
+            let senderKey = senderDerivedKey.XValue + senderDerivedKey.YValue;
+            let secret = Crypto.AES.encrypt(data, senderKey);
             return {
-                x: xDecimalValue,
-                y: yDecimalValue
+                secret: secret,
+                senderPublicKeyString: senderECKeyData.senderPublicKeyString
             };
         },
 
-        getSenderPublicKeyString: function () {
-            privateKey = ellipticCurveEncryption.senderRandom();
-            senderPublicKeyString = ellipticCurveEncryption.senderPublicString(privateKey);
-            return {
-                privateKey: privateKey,
-                senderPublicKeyString: senderPublicKeyString
-            }
+        //Decrypt Data using private-key
+        decryptData: function (data, myPrivateKey) {
+            var receiverECKeyData = {};
+            if (typeof myPrivateKey !== "string") throw new Error("No private key found.");
+
+            let privateKey = this.util.wifToDecimal(myPrivateKey, true);
+            if (typeof privateKey.privateKeyDecimal !== "string") throw new Error(
+                "Failed to detremine your private key.");
+            receiverECKeyData.privateKey = privateKey.privateKeyDecimal;
+
+            var receiverDerivedKey = this.util.deriveReceiverSharedKey(data.senderPublicKeyString,
+                receiverECKeyData
+                .privateKey);
+
+            let receiverKey = receiverDerivedKey.XValue + receiverDerivedKey.YValue;
+            let decryptMsg = Crypto.AES.decrypt(data.secret, receiverKey);
+            return decryptMsg;
         },
 
-        deriveSharedKeySender: function (receiverCompressedPublicKey, senderPrivateKey) {
+        //Sign data using private-key
+        signData: function (data, privateKeyHex) {
+            var key = new Bitcoin.ECKey(privateKeyHex);
+            key.setCompressed(true);
+
+            var privateKeyArr = key.getBitcoinPrivateKeyByteArray();
+            privateKey = BigInteger.fromByteArrayUnsigned(privateKeyArr);
+            var messageHash = Crypto.SHA256(data);
+
+            var messageHashBigInteger = new BigInteger(messageHash);
+            var messageSign = Bitcoin.ECDSA.sign(messageHashBigInteger, key.priv);
+
+            var sighex = Crypto.util.bytesToHex(messageSign);
+            return sighex;
+        },
+
+        //Verify signatue of the data using public-key
+        verifySign: function (data, signatureHex, publicKeyHex) {
+            var msgHash = Crypto.SHA256(data);
+            var messageHashBigInteger = new BigInteger(msgHash);
+
+            var sigBytes = Crypto.util.hexToBytes(signatureHex);
+            var signature = Bitcoin.ECDSA.parseSig(sigBytes);
+
+            var publicKeyPoint = this.util.ecparams.getCurve().decodePointHex(publicKeyHex);
+
+            var verify = Bitcoin.ECDSA.verifyRaw(messageHashBigInteger, signature.r, signature.s,
+                publicKeyPoint);
+            return verify;
+        },
+
+        //Generates a new flo ID and returns private-key, public-key and floID
+        generateNewID: function () {
             try {
-                let receiverPublicKeyString = this.getUncompressedPublicKey(receiverCompressedPublicKey);
-                var senderDerivedKey = ellipticCurveEncryption.senderSharedKeyDerivation(
-                receiverPublicKeyString.x, receiverPublicKeyString.y, senderPrivateKey);
-                return senderDerivedKey;
-            } catch (error) {
-                return new Error(error);
+                var key = new Bitcoin.ECKey(false);
+                key.setCompressed(true);
+                return {
+                    floID: key.getBitcoinAddress(),
+                    pubKey: key.getPubKeyHex(),
+                    privKey: key.getBitcoinWalletImportFormat()
+                }
+            } catch (e) {
+                console.error(e);
             }
         },
 
-        deriveReceiverSharedKey: function (senderPublicKeyString, receiverPrivateKey) {
-            return ellipticCurveEncryption.receiverSharedKeyDerivation(
-                senderPublicKeyString.XValuePublicString, senderPublicKeyString.YValuePublicString,
-                receiverPrivateKey);
+        //Returns public-key from private-key
+        getPubKeyHex: function (privateKeyHex) {
+            var key = new Bitcoin.ECKey(privateKeyHex);
+            if (key.priv == null) {
+                console.error("Invalid Private key");
+                return;
+            }
+            key.setCompressed(true);
+            var pubkeyHex = key.getPubKeyHex();
+            return pubkeyHex;
         },
 
-        getReceiverPublicKeyString: function (privateKey) {
-            return ellipticCurveEncryption.receiverPublicString(privateKey);
-        },
-
-        deriveSharedKeyReceiver: function (senderPublicKeyString, receiverPrivateKey) {
+        //Returns flo-ID from public-key
+        getFloIDfromPubkeyHex: function (pubkeyHex) {
             try {
-                return ellipticCurveEncryption.receiverSharedKeyDerivation(senderPublicKeyString.XValuePublicString,
-                senderPublicKeyString.YValuePublicString, receiverPrivateKey);
-
-            } catch (error) {
-                return new Error(error);
+                var key = new Bitcoin.ECKey().setPub(pubkeyHex);
+                var floID = key.getBitcoinAddress();
+                return floID;
+            } catch (e) {
+                console.error(e);
             }
         },
 
-        wifToDecimal: function (pk_wif, isPubKeyCompressed = false) {
-            let pk = Bitcoin.Base58.decode(pk_wif)
-            pk.shift()
-            pk.splice(-4, 4)
-            //If the private key corresponded to a compressed public key, also drop the last byte (it should be 0x01).
-            if (isPubKeyCompressed == true) pk.pop()
-            pk.unshift(0)
-            privateKeyDecimal = BigInteger(pk).toString()
-            privateKeyHex = Crypto.util.bytesToHex(pk)
-            return {
-                privateKeyDecimal: privateKeyDecimal,
-                privateKeyHex: privateKeyHex
+        //Verify the private-key for the given public-key or flo-ID
+        verifyPrivKey: function (privateKeyHex, pubKey_floID, isfloID = true) {
+            try {
+                var key = new Bitcoin.ECKey(privateKeyHex);
+                if (key.priv == null)
+                    return false;
+                key.setCompressed(true);
+                if (isfloID && pubKey_floID == key.getBitcoinAddress())
+                    return true;
+                else if (!isfloID && pubKey_floID == key.getPubKeyHex())
+                    return true;
+                else
+                    return false;
+            } catch (e) {
+                console.error(e);
             }
-        }
-    },
+        },
 
-    //generate a random Interger within range
-    randInt: function(min, max) {
-        min = Math.ceil(min);
-        max = Math.floor(max);
-        return Math.floor(Math.random() * (max - min + 1)) + min;
-    },
-
-    //generate a random String within length (options : alphaNumeric chars only)
-    randString: function (length, alphaNumeric = false) {
-        var result = '';
-        if(alphaNumeric)
-            var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
-        else
-            var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_+-./*?@#&$<>=[]{}():';
-        for ( var i = 0; i < length; i++ ) 
-            result += characters.charAt(Math.floor(Math.random() * characters.length));
-        return result;
-    },
-
-    //Encrypt Data using public-key
-    encryptData: function (data, receiverCompressedPublicKey) {
-      var senderECKeyData = this.util.getSenderPublicKeyString();
-      var senderDerivedKey = this.util.deriveSharedKeySender(receiverCompressedPublicKey, senderECKeyData.privateKey);
-      let senderKey = senderDerivedKey.XValue + senderDerivedKey.YValue;
-      let secret = Crypto.AES.encrypt(data, senderKey);
-      return {
-        secret: secret,
-        senderPublicKeyString: senderECKeyData.senderPublicKeyString
-      };
-    },
-
-    //Decrypt Data using private-key
-    decryptData: function (data, myPrivateKey) {
-      var receiverECKeyData = {};
-      if (typeof myPrivateKey !== "string") throw new Error("No private key found.");
-
-      let privateKey = this.util.wifToDecimal(myPrivateKey, true);
-      if (typeof privateKey.privateKeyDecimal !== "string") throw new Error(
-        "Failed to detremine your private key.");
-      receiverECKeyData.privateKey = privateKey.privateKeyDecimal;
-
-      var receiverDerivedKey = this.util.deriveReceiverSharedKey(data.senderPublicKeyString, receiverECKeyData
-        .privateKey);
-
-      let receiverKey = receiverDerivedKey.XValue + receiverDerivedKey.YValue;
-      let decryptMsg = Crypto.AES.decrypt(data.secret, receiverKey);
-      return decryptMsg;
-    },
-
-    //Sign data using private-key
-    signData: function (data, privateKeyHex) {
-      var key = new Bitcoin.ECKey(privateKeyHex);
-      key.setCompressed(true);
-
-      var privateKeyArr = key.getBitcoinPrivateKeyByteArray();
-      privateKey = BigInteger.fromByteArrayUnsigned(privateKeyArr);
-      var messageHash = Crypto.SHA256(data);
-
-      var messageHashBigInteger = new BigInteger(messageHash);
-      var messageSign = Bitcoin.ECDSA.sign(messageHashBigInteger, key.priv);
-
-      var sighex = Crypto.util.bytesToHex(messageSign);
-      return sighex;
-    },
-
-    //Verify signatue of the data using public-key
-    verifySign: function (data, signatureHex, publicKeyHex) {
-      var msgHash = Crypto.SHA256(data);
-      var messageHashBigInteger = new BigInteger(msgHash);
-
-      var sigBytes = Crypto.util.hexToBytes(signatureHex);
-      var signature = Bitcoin.ECDSA.parseSig(sigBytes);
-
-      var publicKeyPoint = this.util.ecparams.getCurve().decodePointHex(publicKeyHex);
-
-      var verify = Bitcoin.ECDSA.verifyRaw(messageHashBigInteger, signature.r, signature.s,
-        publicKeyPoint);
-      return verify;
-    },
-
-    //Generates a new flo ID and returns private-key, public-key and floID
-    generateNewID: function () {
-      try {
-        var key = new Bitcoin.ECKey(false);
-        key.setCompressed(true);
-        return {
-          floID: key.getBitcoinAddress(),
-          pubKey: key.getPubKeyHex(),
-          privKey: key.getBitcoinWalletImportFormat()
-        }
-      } catch (e) {
-        console.error(e);
-      }
-    },
-
-    //Returns public-key from private-key
-    getPubKeyHex: function (privateKeyHex) {
-      var key = new Bitcoin.ECKey(privateKeyHex);
-      if (key.priv == null) {
-        console.error("Invalid Private key");
-        return;
-      }
-      key.setCompressed(true);
-      var pubkeyHex = key.getPubKeyHex();
-      return pubkeyHex;
-    },
-
-    //Returns flo-ID from public-key
-    getFloIDfromPubkeyHex: function (pubkeyHex) {
-      try{
-        var key = new Bitcoin.ECKey().setPub(pubkeyHex);
-        var floID = key.getBitcoinAddress();
-        return floID;
-      }catch (e) {
-        console.error(e);
-      }
-    },
-
-    //Verify the private-key for the given public-key or flo-ID
-    verifyPrivKey: function (privateKeyHex, pubKey_floID, isfloID = true) {
-      try {
-        var key = new Bitcoin.ECKey(privateKeyHex);
-        if (key.priv == null)
-          return false;
-        key.setCompressed(true);
-        if (isfloID && pubKey_floID == key.getBitcoinAddress())
-          return true;
-        else if (!isfloID && pubKey_floID == key.getPubKeyHex())
-          return true;
-        else
-          return false;
-      } catch (e) {
-        console.error(e);
-      }
-    },
-
-    //Check if the given Address is valid or not
-    validateAddr: function (inpAddr) {
-      try {
-        var addr = new Bitcoin.Address(inpAddr);
-        return true;
-      } catch {
-        return false;
-      }
-    },
-
-    //Split the str using shamir's Secret and Returns the shares 
-    createShamirsSecretShares: function (str, total_shares, threshold_limit) {
-        try{
-            if (str.length > 0) {
-                var strHex = shamirSecretShare.str2hex(str);
-                var shares = shamirSecretShare.share(strHex, total_shares, threshold_limit);
-                return shares;
+        //Check if the given Address is valid or not
+        validateAddr: function (inpAddr) {
+            try {
+                var addr = new Bitcoin.Address(inpAddr);
+                return true;
+            } catch {
+                return false;
             }
-            return false;
-        }catch{
-            return false
-        }
-    },
+        },
 
-    //Verifies the shares and str
-    verifyShamirsSecret: function (sharesArray, str) {
-        return (str && this.retrieveShamirSecret(sharesArray) === str)
-    },
-
-    //Returns the retrived secret by combining the shamirs shares
-    retrieveShamirSecret: function (sharesArray) {
-        try{
-            if (sharesArray.length > 0) {
-                var comb = shamirSecretShare.combine(sharesArray.slice(0, sharesArray.length));
-                comb = shamirSecretShare.hex2str(comb);
-                return comb;
+        //Split the str using shamir's Secret and Returns the shares 
+        createShamirsSecretShares: function (str, total_shares, threshold_limit) {
+            try {
+                if (str.length > 0) {
+                    var strHex = shamirSecretShare.str2hex(str);
+                    var shares = shamirSecretShare.share(strHex, total_shares, threshold_limit);
+                    return shares;
+                }
+                return false;
+            } catch {
+                return false
+            }
+        },
+
+        //Verifies the shares and str
+        verifyShamirsSecret: function (sharesArray, str) {
+            return (str && this.retrieveShamirSecret(sharesArray) === str)
+        },
+
+        //Returns the retrived secret by combining the shamirs shares
+        retrieveShamirSecret: function (sharesArray) {
+            try {
+                if (sharesArray.length > 0) {
+                    var comb = shamirSecretShare.combine(sharesArray.slice(0, sharesArray.length));
+                    comb = shamirSecretShare.hex2str(comb);
+                    return comb;
+                }
+                return false;
+            } catch {
+                return false
             }
-            return false;
-        }catch{
-            return false
         }
     }
-  }
 </script>
 <script id="floBlockchainAPI">
-  /* FLO Blockchain Operator to send/receive data from blockchain using API calls*/
-  const floBlockchainAPI = {
+    /* FLO Blockchain Operator to send/receive data from blockchain using API calls*/
+    const floBlockchainAPI = {
 
-    util: {
-        serverList: floGlobals.apiURL[floGlobals.blockchain].slice(0),
-        curPos: floCrypto.randInt(0, floGlobals.apiURL[floGlobals.blockchain].length),
-        fetch_retry: function(apicall){
-            return new Promise((resolve,reject) => {
-                this.serverList.splice(this.curPos, 1);
-                this.curPos = floCrypto.randInt(0, this.serverList.length)
-                this.fetch_api(apicall)
-                    .then(result => resolve(result))
-                    .catch(error => reject(error));
-            })
-        },
-        fetch_api: function(apicall){
-            return new Promise((resolve, reject) => {
-                if(this.serverList.length === 0)
-                    reject("No floSight server working")
-                else{
-                    fetch(this.serverList[this.curPos] + apicall).then(response  => {
-                        if(response.ok)
-                            response.json().then(data => resolve(data));
-                        else{
+        util: {
+            serverList: floGlobals.apiURL[floGlobals.blockchain].slice(0),
+            curPos: floCrypto.randInt(0, floGlobals.apiURL[floGlobals.blockchain].length),
+            fetch_retry: function (apicall) {
+                return new Promise((resolve, reject) => {
+                    this.serverList.splice(this.curPos, 1);
+                    this.curPos = floCrypto.randInt(0, this.serverList.length)
+                    this.fetch_api(apicall)
+                        .then(result => resolve(result))
+                        .catch(error => reject(error));
+                })
+            },
+            fetch_api: function (apicall) {
+                return new Promise((resolve, reject) => {
+                    if (this.serverList.length === 0)
+                        reject("No floSight server working")
+                    else {
+                        fetch(this.serverList[this.curPos] + apicall).then(response => {
+                            if (response.ok)
+                                response.json().then(data => resolve(data));
+                            else {
+                                this.fetch_retry(apicall)
+                                    .then(result => resolve(result))
+                                    .catch(error => reject(error));
+                            }
+                        }).catch(error => {
                             this.fetch_retry(apicall)
                                 .then(result => resolve(result))
                                 .catch(error => reject(error));
+                        })
+                    }
+                })
+            }
+        },
+
+        //Promised function to get data from API
+        promisedAPI: function (apicall) {
+            return new Promise((resolve, reject) => {
+                console.log(apicall)
+                this.util.fetch_api(apicall)
+                    .then(result => resolve(result))
+                    .catch(error => reject(error));
+            });
+        },
+
+        //Get balance for the given Address
+        getBalance: function (addr) {
+            return new Promise((resolve, reject) => {
+                this.promisedAPI(`api/addr/${addr}/balance`)
+                    .then(balance => resolve(parseFloat(balance)))
+                    .catch(error => reject(error));
+            });
+        },
+
+        //Write Data into blockchain
+        writeData: function (senderAddr, Data, PrivKey, receiverAddr = floGlobals.adminID) {
+            return new Promise((resolve, reject) => {
+                this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, PrivKey, Data)
+                    .then(txid => resolve(txid))
+                    .catch(error => reject(error))
+            });
+        },
+
+        //Send Tx to blockchain 
+        sendTx: function (senderAddr, receiverAddr, sendAmt, PrivKey, floData = '') {
+            return new Promise((resolve, reject) => {
+                if (!floCrypto.validateAddr(senderAddr))
+                    reject(`Invalid address : ${senderAddr}`);
+                else if (!floCrypto.validateAddr(receiverAddr))
+                    reject(`Invalid address : ${receiverAddr}`);
+                if (PrivKey.length < 1 || !floCrypto.verifyPrivKey(PrivKey, senderAddr))
+                    reject("Invalid Private key!");
+                else if (typeof sendAmt !== 'number' || sendAmt <= 0)
+                    reject(`Invalid sendAmt : ${sendAmt}`);
+                else {
+                    var trx = bitjs.transaction();
+                    var utxoAmt = 0.0;
+                    var fee = floGlobals.fee;
+                    this.promisedAPI(`api/addr/${senderAddr}/utxo`).then(utxos => {
+                        for (var i = utxos.length - 1;
+                            (i >= 0) && (utxoAmt < sendAmt + fee); i--) {
+                            if (utxos[i].confirmations) {
+                                trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i]
+                                    .scriptPubKey)
+                                utxoAmt += utxos[i].amount;
+                            } else break;
                         }
-                    }).catch(error => {
-                        this.fetch_retry(apicall)
-                            .then(result => resolve(result))
-                            .catch(error => reject(error));
-                    })
+                        if (utxoAmt < sendAmt + fee)
+                            reject("Insufficient balance!");
+                        else {
+                            trx.addoutput(receiverAddr, sendAmt);
+                            var change = utxoAmt - sendAmt - fee;
+                            if (change > 0)
+                                trx.addoutput(senderAddr, change);
+                            trx.addflodata(floData);
+                            var signedTxHash = trx.sign(PrivKey, 1);
+                            this.broadcastTx(signedTxHash)
+                                .then(txid => resolve(txid))
+                                .catch(error => reject(error))
+                        }
+                    }).catch(error => reject(error))
+                }
+            });
+        },
+
+        //Broadcast signed Tx in blockchain using API
+        broadcastTx: function (signedTxHash) {
+            return new Promise((resolve, reject) => {
+                var request = new XMLHttpRequest();
+                var url = this.util.serverList[this.util.curPos] + 'api/tx/send';
+                if (signedTxHash.length < 1)
+                    reject("Empty Signature");
+                else {
+                    var params = `{"rawtx":"${signedTxHash}"}`;
+                    request.open('POST', url, true);
+                    //Send the proper header information along with the request
+                    request.setRequestHeader('Content-type', 'application/json');
+                    request.onload = function () {
+                        if (request.readyState == 4 && request.status == 200) {
+                            console.log(request.response);
+                            resolve(JSON.parse(request.response).txid.result);
+                        } else
+                            reject(request.responseText);
+                    }
+                    request.send(params);
                 }
             })
+        },
+
+        //Read Txs of Address between from and to
+        readTxs: function (addr, from, to) {
+            return new Promise((resolve, reject) => {
+                this.promisedAPI(`api/addrs/${addr}/txs?from=${from}&to=${to}`)
+                    .then(response => resolve(response))
+                    .catch(error => reject(error))
+            });
+        },
+
+        //Read All Txs of Address (newest first)
+        readAllTxs: function (addr) {
+            return new Promise((resolve, reject) => {
+                this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=1`).then(response => {
+                    this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=${response.totalItems}0`)
+                        .then(response => resolve(response.items))
+                        .catch(error => reject(error));
+                }).catch(error => reject(error))
+            });
+        },
+
+        /*Read flo Data from txs of given Address
+        options can be used to filter data
+        limit       : maximum number of filtered data (default = 1000, negative  = no limit)
+        ignoreOld   : ignore old txs (default = 0)
+        sentOnly    : filters only sent data
+        pattern     : filters data that starts with a pattern
+        contains    : filters data that contains a string
+        filter      : custom filter funtion for floData (eg . filter: d => {return d[0] == '$'})
+        */
+        readData: function (addr, options = {}) {
+            options.limit = options.limit | 1000
+            options.ignoreOld = options.ignoreOld | 0
+            return new Promise((resolve, reject) => {
+                this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=1`).then(response => {
+                    var newItems = response.totalItems - options.ignoreOld;
+                    this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=${newItems*2}`).then(
+                        response => {
+                            if (options.limit <= 0)
+                                options.limit = response.items.length;
+                            var filteredData = [];
+                            for (i = 0; i < (response.totalItems - options.ignoreOld) &&
+                                filteredData.length < options.limit; i++) {
+                                if (options.sentOnly && response.items[i].vin[0].addr !==
+                                    addr)
+                                    continue;
+                                if (options.pattern && !response.items[i].floData
+                                    .startsWith(options.pattern, 0) && !response.items[i]
+                                    .floData.startsWith(options.pattern, 2))
+                                    continue;
+                                if (options.contains && !response.items[i].floData.includes(
+                                        options.contains))
+                                    continue;
+                                if (options.filter && !options.filter(response.items[i]
+                                        .floData))
+                                    continue;
+                                filteredData.push(response.items[i].floData);
+                            }
+                            resolve({
+                                totalTxs: response.totalItems,
+                                data: filteredData
+                            });
+                        }).catch(error => {
+                        reject(error);
+                    });
+                }).catch(error => {
+                    reject(error);
+                });
+            });
         }
-    },
-
-    //Promised function to get data from API
-    promisedAPI: function (apicall) {
-      return new Promise((resolve, reject) => {
-        console.log(apicall)
-        this.util.fetch_api(apicall)
-            .then(result => resolve(result))
-            .catch(error => reject(error));
-      });
-    },
-
-    //Get balance for the given Address
-    getBalance: function (addr) {
-      return new Promise((resolve, reject) => {
-        this.promisedAPI(`api/addr/${addr}/balance`)
-            .then(balance => resolve(parseFloat(balance)))
-            .catch(error => reject(error));
-      });
-    },
-
-    //Write Data into blockchain
-    writeData: function (senderAddr, Data, PrivKey, receiverAddr = floGlobals.adminID) {
-      return new Promise((resolve, reject) => {
-        this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, PrivKey, Data)
-            .then(txid => resolve(txid))
-            .catch(error => reject(error))
-      });
-    },
-
-    //Send Tx to blockchain 
-    sendTx: function (senderAddr, receiverAddr, sendAmt, PrivKey, floData = '') {
-      return new Promise((resolve, reject) => {
-        if (!floCrypto.validateAddr(senderAddr))
-          reject(`Invalid address : ${senderAddr}`);
-        else if (!floCrypto.validateAddr(receiverAddr))
-          reject(`Invalid address : ${receiverAddr}`);
-        if (PrivKey.length < 1 || !floCrypto.verifyPrivKey(PrivKey, senderAddr))
-          reject("Invalid Private key!");
-        else if (typeof sendAmt !== 'number' || sendAmt <= 0)
-          reject(`Invalid sendAmt : ${sendAmt}`);
-        else {
-          var trx = bitjs.transaction();
-          var utxoAmt = 0.0;
-          var fee = floGlobals.fee;
-          this.promisedAPI(`api/addr/${senderAddr}/utxo`).then(utxos => {
-            for (var i = utxos.length - 1;
-              (i >= 0) && (utxoAmt < sendAmt + fee); i--) {
-              if (utxos[i].confirmations) {
-                trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey)
-                utxoAmt += utxos[i].amount;
-              } else break;
-            }
-            if (utxoAmt < sendAmt + fee)
-              reject("Insufficient balance!");
-            else {
-              trx.addoutput(receiverAddr, sendAmt);
-              var change = utxoAmt - sendAmt - fee;
-              if (change > 0)
-                trx.addoutput(senderAddr, change);
-              trx.addflodata(floData);
-              var signedTxHash = trx.sign(PrivKey, 1);
-              this.broadcastTx(signedTxHash)
-                .then(txid => resolve(txid))
-                .catch(error => reject(error))
-            }
-          }).catch(error => reject(error))
-        }
-      });
-    },
-
-    //Broadcast signed Tx in blockchain using API
-    broadcastTx: function (signedTxHash) {
-      return new Promise((resolve, reject) => {
-        var request = new XMLHttpRequest();
-        var url = this.util.serverList[this.util.curPos] + 'api/tx/send';
-        if (signedTxHash.length < 1)
-          reject("Empty Signature");
-        else {
-          var params = `{"rawtx":"${signedTxHash}"}`;
-          request.open('POST', url, true);
-          //Send the proper header information along with the request
-          request.setRequestHeader('Content-type', 'application/json');
-          request.onload = function () {
-            if (request.readyState == 4 && request.status == 200) {
-              console.log(request.response);
-              resolve(JSON.parse(request.response).txid.result);
-            } else
-              reject(request.responseText);
-          }
-          request.send(params);
-        }
-      })
-    },
-
-    //Read Txs of Address between from and to
-    readTxs: function (addr, from, to) {
-      return new Promise((resolve, reject) => {
-        this.promisedAPI(`api/addrs/${addr}/txs?from=${from}&to=${to}`)
-            .then(response => resolve(response))
-            .catch(error => reject(error))
-      });
-    },
-
-    //Read All Txs of Address (newest first)
-    readAllTxs: function (addr) {
-      return new Promise((resolve, reject) => {
-        this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=1`).then(response => {
-          this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=${response.totalItems}0`)
-            .then(response => resolve(response.items))
-            .catch(error => reject(error));
-        }).catch(error => reject(error))
-      });
-    },
-
-    /*Read flo Data from txs of given Address
-    options can be used to filter data
-    limit       : maximum number of filtered data (default = 1000, negative  = no limit)
-    ignoreOld   : ignore old txs (default = 0)
-    sentOnly    : filters only sent data
-    pattern     : filters data that starts with a pattern
-    contains    : filters data that contains a string
-    filter      : custom filter funtion for floData (eg . filter: d => {return d[0] == '$'})
-    */
-    readData: function(addr,options = {}){
-        options.limit = options.limit | 1000
-        options.ignoreOld = options.ignoreOld | 0
-        return new Promise((resolve, reject) => {
-        this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=1`).then(response => {
-          var newItems = response.totalItems - options.ignoreOld;
-          this.promisedAPI(`api/addrs/${addr}/txs?from=0&to=${newItems*2}`).then(response => {
-              if (options.limit <= 0) 
-                options.limit = response.items.length;
-              var filteredData = [];
-              for (i = 0; i < (response.totalItems - options.ignoreOld) && filteredData.length < options.limit; i++){
-                if(options.sentOnly && response.items[i].vin[0].addr !== addr)
-                    continue;
-                if(options.pattern && !response.items[i].floData.startsWith(options.pattern, 0) && !response.items[i].floData.startsWith(options.pattern, 2))
-                    continue;
-                if(options.contains && !response.items[i].floData.includes(options.contains))
-                    continue;
-                if(options.filter && !options.filter(response.items[i].floData))
-                    continue;
-                filteredData.push(response.items[i].floData);
-              }
-              resolve({totalTxs:response.totalItems , data:filteredData});
-          }).catch(error => {
-            reject(error);
-          });
-        }).catch(error => {
-          reject(error);
-        });
-      });
     }
-  }
 </script>
 <script id="floSupernode">
-  /* flo Supernode Operators to send/receive data from supernodes using websocket */
-  const floSupernode = {
+    /* flo Supernode Operators to send/receive data from supernodes using websocket */
+    const floSupernode = {
 
-    //kBucket object 
-    kBucket: {
-      supernodeKBucket: null,
-      decodeBase58Address: function (address) {
-        let k = bitjs.Base58.decode(address)
-        k.shift()
-        k.splice(-4, 4)
-        return Crypto.util.bytesToHex(k)
-      },
-      floIdToKbucketId: function (address) {
-        const decodedId = this.decodeBase58Address(address);
-        const nodeIdBigInt = new BigInteger(decodedId, 16);
-        const nodeIdBytes = nodeIdBigInt.toByteArrayUnsigned();
-        const nodeIdNewInt8Array = new Uint8Array(nodeIdBytes);
-        return nodeIdNewInt8Array;
-      },
-      launch: function (superNodeList = Object.keys(floGlobals.supernodes), master_floID = floGlobals.adminID) {
-        return new Promise((resolve, reject) => {
-          try {
-            const SuKBucketId = this.floIdToKbucketId(master_floID);
-            const SukbOptions = {
-              localNodeId: SuKBucketId
-            }
-            this.supernodeKBucket = new BuildKBucket(SukbOptions);
-            for (var i = 0; i < superNodeList.length; i++) {
-              this.addNewNode(superNodeList[i])
-            }
-            resolve('SuperNode KBucket formed');
-          } catch (error) {
-            reject(error);
-          }
-        });
-      },
-      addContact: function (id, floID, KB = this.supernodeKBucket) {
-        const contact = {
-          id: id,
-          floID: floID
-        };
-        KB.add(contact)
-      },
-      addNewNode: function (address, KB = this.supernodeKBucket) {
-        let decodedId = address;
-        try {
-          decodedId = this.floIdToKbucketId(address);
-        } catch (e) {
-          decodedId = address;
-        }
-        this.addContact(decodedId, address, KB);
-      },
-      isNodePresent: function (flo_id, KB = this.supernodeKBucket) {
-        let kArray = KB.toArray();
-        let kArrayFloIds = kArray.map(k => k.floID);
-        if (kArrayFloIds.includes(flo_id))
-            return true;
-        else
-            return false;
-      },
- 
-      getInnerNodes: function(flo_addr1, flo_addr2, KB = this.supernodeKBucket){
-        return new Promise((resolve, reject) => {
-          let kArrayFloIds = KB.toArray().map(k => k.floID);
-          var innerNodes = []
-          if(kArrayFloIds.includes(flo_addr1) && kArrayFloIds.includes(flo_addr2)){
-            for(var i = kArrayFloIds.indexOf(flo_addr1); i!= flo_addr2; i++){
-                if(i >= kArrayFloIds.length)
-                    i = -1
+        //kBucket object 
+        kBucket: {
+            supernodeKBucket: null,
+            decodeBase58Address: function (address) {
+                let k = bitjs.Base58.decode(address)
+                k.shift()
+                k.splice(-4, 4)
+                return Crypto.util.bytesToHex(k)
+            },
+            floIdToKbucketId: function (address) {
+                const decodedId = this.decodeBase58Address(address);
+                const nodeIdBigInt = new BigInteger(decodedId, 16);
+                const nodeIdBytes = nodeIdBigInt.toByteArrayUnsigned();
+                const nodeIdNewInt8Array = new Uint8Array(nodeIdBytes);
+                return nodeIdNewInt8Array;
+            },
+            launch: function (superNodeList = Object.keys(floGlobals.supernodes), master_floID = floGlobals
+            .adminID) {
+                return new Promise((resolve, reject) => {
+                    try {
+                        const SuKBucketId = this.floIdToKbucketId(master_floID);
+                        const SukbOptions = {
+                            localNodeId: SuKBucketId
+                        }
+                        this.supernodeKBucket = new BuildKBucket(SukbOptions);
+                        for (var i = 0; i < superNodeList.length; i++) {
+                            this.addNewNode(superNodeList[i])
+                        }
+                        resolve('SuperNode KBucket formed');
+                    } catch (error) {
+                        reject(error);
+                    }
+                });
+            },
+            addContact: function (id, floID, KB = this.supernodeKBucket) {
+                const contact = {
+                    id: id,
+                    floID: floID
+                };
+                KB.add(contact)
+            },
+            addNewNode: function (address, KB = this.supernodeKBucket) {
+                let decodedId = address;
+                try {
+                    decodedId = this.floIdToKbucketId(address);
+                } catch (e) {
+                    decodedId = address;
+                }
+                this.addContact(decodedId, address, KB);
+            },
+            isNodePresent: function (flo_id, KB = this.supernodeKBucket) {
+                let kArray = KB.toArray();
+                let kArrayFloIds = kArray.map(k => k.floID);
+                if (kArrayFloIds.includes(flo_id))
+                    return true;
                 else
-                    innerNodes.push(kArrayFloIds[i])
+                    return false;
+            },
+
+            getInnerNodes: function (flo_addr1, flo_addr2, KB = this.supernodeKBucket) {
+                return new Promise((resolve, reject) => {
+                    let kArrayFloIds = KB.toArray().map(k => k.floID);
+                    var innerNodes = []
+                    if (kArrayFloIds.includes(flo_addr1) && kArrayFloIds.includes(flo_addr2)) {
+                        for (var i = kArrayFloIds.indexOf(flo_addr1); i != flo_addr2; i++) {
+                            if (i >= kArrayFloIds.length)
+                                i = -1
+                            else
+                                innerNodes.push(kArrayFloIds[i])
+                        }
+                        resolve(innerNodes)
+                    } else
+                        reject('Given nodes are not in KBucket')
+                });
+            },
+
+            getOuterNodes: function (flo_addr1, flo_addr2, KB = this.supernodeKBucket) {
+                return new Promise((resolve, reject) => {
+                    let kArrayFloIds = KB.toArray().map(k => k.floID);
+                    var outterNodes = []
+                    if (kArrayFloIds.includes(flo_addr1) && kArrayFloIds.includes(flo_addr2)) {
+                        for (var i = kArrayFloIds.indexOf(flo_addr2); i != flo_addr1; i++) {
+                            if (i >= kArrayFloIds.length)
+                                i = -1
+                            else
+                                outterNodes.push(kArrayFloIds[i])
+                        }
+                        resolve(outterNodes)
+                    } else
+                        reject('Given nodes are not in KBucket')
+                });
+            },
+
+            getPrevSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
+                return new Promise((resolve, reject) => {
+                    try {
+                        let kArrayFloIds = KB.toArray().map(k => k.floID);
+                        let pos = kArrayFloIds.indexOf(flo_addr)
+                        var prevSupernode = []
+                        for (var i = 1; i <= n; i++) {
+                            if (pos - i < 0)
+                                var prev = pos - i + kArrayFloIds.length
+                            else
+                                var prev = pos - i
+                            prevSupernode.push(kArrayFloIds[prev])
+                        }
+                        resolve(prevSupernode);
+                    } catch (error) {
+                        reject(error);
+                    }
+                });
+            },
+
+            getNextSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
+                return new Promise((resolve, reject) => {
+                    try {
+                        let kArrayFloIds = KB.toArray().map(k => k.floID);
+                        let pos = kArrayFloIds.indexOf(flo_addr)
+                        var nextSupernode = []
+                        for (var i = 1; i <= n; i++) {
+                            if (pos + i >= kArrayFloIds.length)
+                                var next = pos + i - kArrayFloIds.length
+                            else
+                                var next = pos + i
+                            nextSupernode.push(kArrayFloIds[next])
+                        }
+                        resolve(nextSupernode);
+                    } catch (error) {
+                        reject(error);
+                    }
+                });
+            },
+
+            determineClosestSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
+                return new Promise((resolve, reject) => {
+                    try {
+                        let isFloIdUint8 = flo_addr instanceof Uint8Array;
+                        if (!isFloIdUint8)
+                            flo_addr = this.floIdToKbucketId(flo_addr);
+                        var closestSupernode = KB.closest(flo_addr, n);
+                        closestSupernode = closestSupernode.map(k => k.floID);
+                        resolve(closestSupernode);
+                    } catch (error) {
+                        reject(error);
+                    }
+                });
             }
-            resolve(innerNodes)
-          }else
-            reject('Given nodes are not in KBucket')
-        });
-      },
+        },
 
-      getOuterNodes: function(flo_addr1, flo_addr2, KB = this.supernodeKBucket){
-        return new Promise((resolve, reject) => {
-          let kArrayFloIds = KB.toArray().map(k => k.floID);
-          var outterNodes = []
-          if(kArrayFloIds.includes(flo_addr1) && kArrayFloIds.includes(flo_addr2)){
-            for(var i = kArrayFloIds.indexOf(flo_addr2); i!= flo_addr1; i++){
-                if(i >= kArrayFloIds.length)
-                    i = -1
-                else
-                    outterNodes.push(kArrayFloIds[i])
-            }
-            resolve(outterNodes)
-          }else
-            reject('Given nodes are not in KBucket')
-        });
-      },
-
-      getPrevSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
-        return new Promise((resolve, reject) => {
-          try {
-            let kArrayFloIds = KB.toArray().map(k => k.floID);
-            let pos = kArrayFloIds.indexOf(flo_addr)
-            var prevSupernode = []
-            for(var i = 1; i <= n; i++){
-                if(pos - i < 0)
-                    var prev = pos - i + kArrayFloIds.length
-                else
-                    var prev = pos - i
-                prevSupernode.push(kArrayFloIds[prev])
-            }
-            resolve(prevSupernode);
-          } catch (error) {
-            reject(error);
-          }
-        });
-      },
-
-      getNextSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
-        return new Promise((resolve, reject) => {
-          try {
-            let kArrayFloIds = KB.toArray().map(k => k.floID);
-            let pos = kArrayFloIds.indexOf(flo_addr)
-            var nextSupernode = []
-            for(var i = 1; i <= n; i++){
-                if(pos + i >= kArrayFloIds.length)
-                    var next = pos + i - kArrayFloIds.length
-                else
-                    var next = pos + i
-                nextSupernode.push(kArrayFloIds[next])
-            }
-            resolve(nextSupernode);
-          } catch (error) {
-            reject(error);
-          }
-        });
-      },
-
-      determineClosestSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
-        return new Promise((resolve, reject) => {
-          try {
-            let isFloIdUint8 = flo_addr instanceof Uint8Array;
-            if (!isFloIdUint8)
-              flo_addr = this.floIdToKbucketId(flo_addr);
-            var closestSupernode = KB.closest(flo_addr, n);
-            closestSupernode = closestSupernode.map(k => k.floID);
-            resolve(closestSupernode);
-          } catch (error) {
-            reject(error);
-          }
-        });
-      }
-    },
-
-    sendDataToSN(data, snfloID){
-        return new Promise((resolve, reject) => {
-            var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
-            websocket.onmessage = (evt => {
-                if(evt.data == '$+'){
-                    websocket.send(data);
-                    resolve(`Data sent to supernode : ${snfloID}`);
-                }else if(evt.data == '$-'){
+        sendDataToSN(data, snfloID) {
+            return new Promise((resolve, reject) => {
+                var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
+                websocket.onmessage = (evt => {
+                    if (evt.data == '$+') {
+                        websocket.send(data);
+                        resolve(`Data sent to supernode : ${snfloID}`);
+                    } else if (evt.data == '$-') {
+                        this.kBucket.getNextSupernode(snfloID).then(nextNode => {
+                            this.sendDataToSN(data, nextNode[0])
+                                .then(result => resolve(result))
+                                .catch(error => reject(error))
+                        }).catch(error => reject(error))
+                    } else {
+                        console.log(evt.data)
+                        reject(evt.data)
+                    }
+                    websocket.close();
+                })
+                websocket.onerror = (evt) => {
                     this.kBucket.getNextSupernode(snfloID).then(nextNode => {
                         this.sendDataToSN(data, nextNode[0])
                             .then(result => resolve(result))
                             .catch(error => reject(error))
                     }).catch(error => reject(error))
-                }else{
-                    console.log(evt.data)
-                    reject(evt.data)
-                }
-                websocket.close();
+                };
             })
-            websocket.onerror = (evt) => {
-                this.kBucket.getNextSupernode(snfloID).then(nextNode => {
-                    this.sendDataToSN(data, nextNode[0])
+        },
+
+        //Sends data to the supernode
+        sendData: function (data, floID) {
+            return new Promise((resolve, reject) => {
+                this.kBucket.determineClosestSupernode(floID).then(closestNode => {
+                    this.sendDataToSN(data, closestNode[0])
                         .then(result => resolve(result))
                         .catch(error => reject(error))
-                }).catch(error => reject(error))
-            };
-        })
-    },
+                }).catch(error => {
+                    reject(error);
+                });
+            });
+        },
 
-    //Sends data to the supernode
-    sendData: function (data, floID) {
-      return new Promise((resolve, reject) => {
-        this.kBucket.determineClosestSupernode(floID).then(closestNode => {
-            this.sendDataToSN(data, closestNode[0])
-                .then(result => resolve(result))
-                .catch(error => reject(error))
-        }).catch(error => {
-            reject(error);
-        });
-      });
-    },
-
-    requestDataFromSN(request, snfloID){
-        return new Promise((resolve, reject) => {
-            var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
-            websocket.onmessage = (evt => {
-                if(evt.data == '$+'){
-                    websocket.send(`?${request}`);
-                }else if(evt.data == '$-'){
+        requestDataFromSN(request, snfloID) {
+            return new Promise((resolve, reject) => {
+                var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
+                websocket.onmessage = (evt => {
+                    if (evt.data == '$+') {
+                        websocket.send(`?${request}`);
+                    } else if (evt.data == '$-') {
+                        this.kBucket.getNextSupernode(snfloID).then(nextNode => {
+                            this.requestDataFromSN(request, nextNode[0])
+                                .then(result => resolve(result))
+                                .catch(error => reject(error))
+                        }).catch(error => reject(error))
+                        websocket.close()
+                    } else {
+                        resolve(evt.data);
+                        websocket.close();
+                    }
+                })
+                websocket.onerror = (evt) => {
                     this.kBucket.getNextSupernode(snfloID).then(nextNode => {
                         this.requestDataFromSN(request, nextNode[0])
                             .then(result => resolve(result))
                             .catch(error => reject(error))
                     }).catch(error => reject(error))
-                    websocket.close()
-                }else{
-                    resolve(evt.data);
-                    websocket.close();
-                }
+                };
             })
-            websocket.onerror = (evt) => {
-                this.kBucket.getNextSupernode(snfloID).then(nextNode => {
-                    this.requestDataFromSN(request, nextNode[0])
+        },
+
+        //Request data from supernode
+        requestData: function (request, floID) {
+            return new Promise((resolve, reject) => {
+                this.kBucket.determineClosestSupernode(floID).then(closestNode => {
+                    this.requestDataFromSN(request, closestNode[0])
                         .then(result => resolve(result))
                         .catch(error => reject(error))
-                }).catch(error => reject(error))
-            };
-        })
-    },
-
-    //Request data from supernode
-    requestData: function (request, floID) {
-      return new Promise((resolve, reject) => {
-        this.kBucket.determineClosestSupernode(floID).then(closestNode => {
-            this.requestDataFromSN(request, closestNode[0])
-                .then(result => resolve(result))
-                .catch(error => reject(error))
-        }).catch(error => {
-            reject(error);
-        });
-      });
-    }
-  }
-
-  /**Kademlia DHT K-bucket implementation as a binary tree.
-   * Implementation of a Kademlia DHT k-bucket used for storing
-   * contact (peer node) information.
-   *
-   * @extends EventEmitter
-   */
-   function BuildKBucket(options = {}) {
-    /**
-     * `options`:
-     *   `distance`: Function
-     *     `function (firstId, secondId) { return distance }` An optional
-     *     `distance` function that gets two `id` Uint8Arrays
-     *     and return distance (as number) between them.
-     *   `arbiter`: Function (Default: vectorClock arbiter)
-     *     `function (incumbent, candidate) { return contact; }` An optional
-     *     `arbiter` function that givent two `contact` objects with the same `id`
-     *     returns the desired object to be used for updating the k-bucket. For
-     *     more details, see [arbiter function](#arbiter-function).
-     *   `localNodeId`: Uint8Array An optional Uint8Array representing the local node id.
-     *     If not provided, a local node id will be created via `randomBytes(20)`.
-     *     `metadata`: Object (Default: {}) Optional satellite data to include
-     *     with the k-bucket. `metadata` property is guaranteed not be altered by,
-     *     it is provided as an explicit container for users of k-bucket to store
-     *     implementation-specific data.
-     *   `numberOfNodesPerKBucket`: Integer (Default: 20) The number of nodes
-     *     that a k-bucket can contain before being full or split.
-     *     `numberOfNodesToPing`: Integer (Default: 3) The number of nodes to
-     *     ping when a bucket that should not be split becomes full. KBucket will
-     *     emit a `ping` event that contains `numberOfNodesToPing` nodes that have
-     *     not been contacted the longest.
-     *
-     * @param {Object=} options optional
-     */
-
-    this.localNodeId = options.localNodeId || window.crypto.getRandomValues(new Uint8Array(20))
-    this.numberOfNodesPerKBucket = options.numberOfNodesPerKBucket || 20
-    this.numberOfNodesToPing = options.numberOfNodesToPing || 3
-    this.distance = options.distance || this.distance
-    // use an arbiter from options or vectorClock arbiter by default
-    this.arbiter = options.arbiter || this.arbiter
-    this.metadata = Object.assign({}, options.metadata)
-
-    this.createNode = function () {
-      return {
-        contacts: [],
-        dontSplit: false,
-        left: null,
-        right: null
-      }
-    }
-
-    this.ensureInt8 = function (name, val) {
-      if (!(val instanceof Uint8Array)) {
-        throw new TypeError(name + ' is not a Uint8Array')
-      }
-    }
-
-    /**
-     * @param  {Uint8Array} array1
-     * @param  {Uint8Array} array2
-     * @return {Boolean}
-     */
-    this.arrayEquals = function (array1, array2) {
-      if (array1 === array2) {
-        return true
-      }
-      if (array1.length !== array2.length) {
-        return false
-      }
-      for (let i = 0, length = array1.length; i < length; ++i) {
-        if (array1[i] !== array2[i]) {
-          return false
+                }).catch(error => {
+                    reject(error);
+                });
+            });
         }
-      }
-      return true
     }
 
-    this.ensureInt8('option.localNodeId as parameter 1', this.localNodeId)
-    this.root = this.createNode()
-
-    /**
-     * Default arbiter function for contacts with the same id. Uses
-     * contact.vectorClock to select which contact to update the k-bucket with.
-     * Contact with larger vectorClock field will be selected. If vectorClock is
-     * the same, candidat will be selected.
+    /**Kademlia DHT K-bucket implementation as a binary tree.
+     * Implementation of a Kademlia DHT k-bucket used for storing
+     * contact (peer node) information.
      *
-     * @param  {Object} incumbent Contact currently stored in the k-bucket.
-     * @param  {Object} candidate Contact being added to the k-bucket.
-     * @return {Object}           Contact to updated the k-bucket with.
+     * @extends EventEmitter
      */
-    this.arbiter = function (incumbent, candidate) {
-      return incumbent.vectorClock > candidate.vectorClock ? incumbent : candidate
-    }
+    function BuildKBucket(options = {}) {
+        /**
+         * `options`:
+         *   `distance`: Function
+         *     `function (firstId, secondId) { return distance }` An optional
+         *     `distance` function that gets two `id` Uint8Arrays
+         *     and return distance (as number) between them.
+         *   `arbiter`: Function (Default: vectorClock arbiter)
+         *     `function (incumbent, candidate) { return contact; }` An optional
+         *     `arbiter` function that givent two `contact` objects with the same `id`
+         *     returns the desired object to be used for updating the k-bucket. For
+         *     more details, see [arbiter function](#arbiter-function).
+         *   `localNodeId`: Uint8Array An optional Uint8Array representing the local node id.
+         *     If not provided, a local node id will be created via `randomBytes(20)`.
+         *     `metadata`: Object (Default: {}) Optional satellite data to include
+         *     with the k-bucket. `metadata` property is guaranteed not be altered by,
+         *     it is provided as an explicit container for users of k-bucket to store
+         *     implementation-specific data.
+         *   `numberOfNodesPerKBucket`: Integer (Default: 20) The number of nodes
+         *     that a k-bucket can contain before being full or split.
+         *     `numberOfNodesToPing`: Integer (Default: 3) The number of nodes to
+         *     ping when a bucket that should not be split becomes full. KBucket will
+         *     emit a `ping` event that contains `numberOfNodesToPing` nodes that have
+         *     not been contacted the longest.
+         *
+         * @param {Object=} options optional
+         */
 
-    /**
-     * Default distance function. Finds the XOR
-     * distance between firstId and secondId.
-     *
-     * @param  {Uint8Array} firstId  Uint8Array containing first id.
-     * @param  {Uint8Array} secondId Uint8Array containing second id.
-     * @return {Number}              Integer The XOR distance between firstId
-     *                               and secondId.
-     */
-    this.distance = function (firstId, secondId) {
-      let distance = 0
-      let i = 0
-      const min = Math.min(firstId.length, secondId.length)
-      const max = Math.max(firstId.length, secondId.length)
-      for (; i < min; ++i) {
-        distance = distance * 256 + (firstId[i] ^ secondId[i])
-      }
-      for (; i < max; ++i) distance = distance * 256 + 255
-      return distance
-    }
+        this.localNodeId = options.localNodeId || window.crypto.getRandomValues(new Uint8Array(20))
+        this.numberOfNodesPerKBucket = options.numberOfNodesPerKBucket || 20
+        this.numberOfNodesToPing = options.numberOfNodesToPing || 3
+        this.distance = options.distance || this.distance
+        // use an arbiter from options or vectorClock arbiter by default
+        this.arbiter = options.arbiter || this.arbiter
+        this.metadata = Object.assign({}, options.metadata)
 
-    /**
-     * Adds a contact to the k-bucket.
-     *
-     * @param {Object} contact the contact object to add
-     */
-    this.add = function (contact) {
-      this.ensureInt8('contact.id', (contact || {}).id)
-
-      let bitIndex = 0
-      let node = this.root
-
-      while (node.contacts === null) {
-        // this is not a leaf node but an inner node with 'low' and 'high'
-        // branches; we will check the appropriate bit of the identifier and
-        // delegate to the appropriate node for further processing
-        node = this._determineNode(node, contact.id, bitIndex++)
-      }
-
-      // check if the contact already exists
-      const index = this._indexOf(node, contact.id)
-      if (index >= 0) {
-        this._update(node, index, contact)
-        return this
-      }
-
-      if (node.contacts.length < this.numberOfNodesPerKBucket) {
-        node.contacts.push(contact)
-        return this
-      }
-
-      // the bucket is full
-      if (node.dontSplit) {
-        // we are not allowed to split the bucket
-        // we need to ping the first this.numberOfNodesToPing
-        // in order to determine if they are alive
-        // only if one of the pinged nodes does not respond, can the new contact
-        // be added (this prevents DoS flodding with new invalid contacts)
-        return this
-      }
-
-      this._split(node, bitIndex)
-      return this.add(contact)
-    }
-
-    /**
-     * Get the n closest contacts to the provided node id. "Closest" here means:
-     * closest according to the XOR metric of the contact node id.
-     *
-     * @param  {Uint8Array} id  Contact node id
-     * @param  {Number=} n      Integer (Default: Infinity) The maximum number of
-     *                          closest contacts to return
-     * @return {Array}          Array Maximum of n closest contacts to the node id
-     */
-    this.closest = function (id, n = Infinity) {
-      this.ensureInt8('id', id)
-
-      if ((!Number.isInteger(n) && n !== Infinity) || n <= 0) {
-        throw new TypeError('n is not positive number')
-      }
-
-      let contacts = []
-
-      for (let nodes = [this.root], bitIndex = 0; nodes.length > 0 && contacts.length < n;) {
-        const node = nodes.pop()
-        if (node.contacts === null) {
-          const detNode = this._determineNode(node, id, bitIndex++)
-          nodes.push(node.left === detNode ? node.right : node.left)
-          nodes.push(detNode)
-        } else {
-          contacts = contacts.concat(node.contacts)
+        this.createNode = function () {
+            return {
+                contacts: [],
+                dontSplit: false,
+                left: null,
+                right: null
+            }
         }
-      }
 
-      return contacts
-        .map(a => [this.distance(a.id, id), a])
-        .sort((a, b) => a[0] - b[0])
-        .slice(0, n)
-        .map(a => a[1])
+        this.ensureInt8 = function (name, val) {
+            if (!(val instanceof Uint8Array)) {
+                throw new TypeError(name + ' is not a Uint8Array')
+            }
+        }
+
+        /**
+         * @param  {Uint8Array} array1
+         * @param  {Uint8Array} array2
+         * @return {Boolean}
+         */
+        this.arrayEquals = function (array1, array2) {
+            if (array1 === array2) {
+                return true
+            }
+            if (array1.length !== array2.length) {
+                return false
+            }
+            for (let i = 0, length = array1.length; i < length; ++i) {
+                if (array1[i] !== array2[i]) {
+                    return false
+                }
+            }
+            return true
+        }
+
+        this.ensureInt8('option.localNodeId as parameter 1', this.localNodeId)
+        this.root = this.createNode()
+
+        /**
+         * Default arbiter function for contacts with the same id. Uses
+         * contact.vectorClock to select which contact to update the k-bucket with.
+         * Contact with larger vectorClock field will be selected. If vectorClock is
+         * the same, candidat will be selected.
+         *
+         * @param  {Object} incumbent Contact currently stored in the k-bucket.
+         * @param  {Object} candidate Contact being added to the k-bucket.
+         * @return {Object}           Contact to updated the k-bucket with.
+         */
+        this.arbiter = function (incumbent, candidate) {
+            return incumbent.vectorClock > candidate.vectorClock ? incumbent : candidate
+        }
+
+        /**
+         * Default distance function. Finds the XOR
+         * distance between firstId and secondId.
+         *
+         * @param  {Uint8Array} firstId  Uint8Array containing first id.
+         * @param  {Uint8Array} secondId Uint8Array containing second id.
+         * @return {Number}              Integer The XOR distance between firstId
+         *                               and secondId.
+         */
+        this.distance = function (firstId, secondId) {
+            let distance = 0
+            let i = 0
+            const min = Math.min(firstId.length, secondId.length)
+            const max = Math.max(firstId.length, secondId.length)
+            for (; i < min; ++i) {
+                distance = distance * 256 + (firstId[i] ^ secondId[i])
+            }
+            for (; i < max; ++i) distance = distance * 256 + 255
+            return distance
+        }
+
+        /**
+         * Adds a contact to the k-bucket.
+         *
+         * @param {Object} contact the contact object to add
+         */
+        this.add = function (contact) {
+            this.ensureInt8('contact.id', (contact || {}).id)
+
+            let bitIndex = 0
+            let node = this.root
+
+            while (node.contacts === null) {
+                // this is not a leaf node but an inner node with 'low' and 'high'
+                // branches; we will check the appropriate bit of the identifier and
+                // delegate to the appropriate node for further processing
+                node = this._determineNode(node, contact.id, bitIndex++)
+            }
+
+            // check if the contact already exists
+            const index = this._indexOf(node, contact.id)
+            if (index >= 0) {
+                this._update(node, index, contact)
+                return this
+            }
+
+            if (node.contacts.length < this.numberOfNodesPerKBucket) {
+                node.contacts.push(contact)
+                return this
+            }
+
+            // the bucket is full
+            if (node.dontSplit) {
+                // we are not allowed to split the bucket
+                // we need to ping the first this.numberOfNodesToPing
+                // in order to determine if they are alive
+                // only if one of the pinged nodes does not respond, can the new contact
+                // be added (this prevents DoS flodding with new invalid contacts)
+                return this
+            }
+
+            this._split(node, bitIndex)
+            return this.add(contact)
+        }
+
+        /**
+         * Get the n closest contacts to the provided node id. "Closest" here means:
+         * closest according to the XOR metric of the contact node id.
+         *
+         * @param  {Uint8Array} id  Contact node id
+         * @param  {Number=} n      Integer (Default: Infinity) The maximum number of
+         *                          closest contacts to return
+         * @return {Array}          Array Maximum of n closest contacts to the node id
+         */
+        this.closest = function (id, n = Infinity) {
+            this.ensureInt8('id', id)
+
+            if ((!Number.isInteger(n) && n !== Infinity) || n <= 0) {
+                throw new TypeError('n is not positive number')
+            }
+
+            let contacts = []
+
+            for (let nodes = [this.root], bitIndex = 0; nodes.length > 0 && contacts.length < n;) {
+                const node = nodes.pop()
+                if (node.contacts === null) {
+                    const detNode = this._determineNode(node, id, bitIndex++)
+                    nodes.push(node.left === detNode ? node.right : node.left)
+                    nodes.push(detNode)
+                } else {
+                    contacts = contacts.concat(node.contacts)
+                }
+            }
+
+            return contacts
+                .map(a => [this.distance(a.id, id), a])
+                .sort((a, b) => a[0] - b[0])
+                .slice(0, n)
+                .map(a => a[1])
+        }
+
+        /**
+         * Counts the total number of contacts in the tree.
+         *
+         * @return {Number} The number of contacts held in the tree
+         */
+        this.count = function () {
+            // return this.toArray().length
+            let count = 0
+            for (const nodes = [this.root]; nodes.length > 0;) {
+                const node = nodes.pop()
+                if (node.contacts === null) nodes.push(node.right, node.left)
+                else count += node.contacts.length
+            }
+            return count
+        }
+
+        /**
+         * Determines whether the id at the bitIndex is 0 or 1.
+         * Return left leaf if `id` at `bitIndex` is 0, right leaf otherwise
+         *
+         * @param  {Object} node     internal object that has 2 leafs: left and right
+         * @param  {Uint8Array} id   Id to compare localNodeId with.
+         * @param  {Number} bitIndex Integer (Default: 0) The bit index to which bit
+         *                           to check in the id Uint8Array.
+         * @return {Object}          left leaf if id at bitIndex is 0, right leaf otherwise.
+         */
+        this._determineNode = function (node, id, bitIndex) {
+            // *NOTE* remember that id is a Uint8Array and has granularity of
+            // bytes (8 bits), whereas the bitIndex is the bit index (not byte)
+
+            // id's that are too short are put in low bucket (1 byte = 8 bits)
+            // (bitIndex >> 3) finds how many bytes the bitIndex describes
+            // bitIndex % 8 checks if we have extra bits beyond byte multiples
+            // if number of bytes is <= no. of bytes described by bitIndex and there
+            // are extra bits to consider, this means id has less bits than what
+            // bitIndex describes, id therefore is too short, and will be put in low
+            // bucket
+            const bytesDescribedByBitIndex = bitIndex >> 3
+            const bitIndexWithinByte = bitIndex % 8
+            if ((id.length <= bytesDescribedByBitIndex) && (bitIndexWithinByte !== 0)) {
+                return node.left
+            }
+
+            const byteUnderConsideration = id[bytesDescribedByBitIndex]
+
+            // byteUnderConsideration is an integer from 0 to 255 represented by 8 bits
+            // where 255 is 11111111 and 0 is 00000000
+            // in order to find out whether the bit at bitIndexWithinByte is set
+            // we construct (1 << (7 - bitIndexWithinByte)) which will consist
+            // of all bits being 0, with only one bit set to 1
+            // for example, if bitIndexWithinByte is 3, we will construct 00010000 by
+            // (1 << (7 - 3)) -> (1 << 4) -> 16
+            if (byteUnderConsideration & (1 << (7 - bitIndexWithinByte))) {
+                return node.right
+            }
+
+            return node.left
+        }
+
+        /**
+         * Get a contact by its exact ID.
+         * If this is a leaf, loop through the bucket contents and return the correct
+         * contact if we have it or null if not. If this is an inner node, determine
+         * which branch of the tree to traverse and repeat.
+         *
+         * @param  {Uint8Array} id The ID of the contact to fetch.
+         * @return {Object|Null}   The contact if available, otherwise null
+         */
+        this.get = function (id) {
+            this.ensureInt8('id', id)
+
+            let bitIndex = 0
+
+            let node = this.root
+            while (node.contacts === null) {
+                node = this._determineNode(node, id, bitIndex++)
+            }
+
+            // index of uses contact id for matching
+            const index = this._indexOf(node, id)
+            return index >= 0 ? node.contacts[index] : null
+        }
+
+        /**
+         * Returns the index of the contact with provided
+         * id if it exists, returns -1 otherwise.
+         *
+         * @param  {Object} node    internal object that has 2 leafs: left and right
+         * @param  {Uint8Array} id  Contact node id.
+         * @return {Number}         Integer Index of contact with provided id if it
+         *                          exists, -1 otherwise.
+         */
+        this._indexOf = function (node, id) {
+            for (let i = 0; i < node.contacts.length; ++i) {
+                if (this.arrayEquals(node.contacts[i].id, id)) return i
+            }
+
+            return -1
+        }
+
+        /**
+         * Removes contact with the provided id.
+         *
+         * @param  {Uint8Array} id The ID of the contact to remove.
+         * @return {Object}        The k-bucket itself.
+         */
+        this.remove = function (id) {
+            this.ensureInt8('the id as parameter 1', id)
+
+            let bitIndex = 0
+            let node = this.root
+
+            while (node.contacts === null) {
+                node = this._determineNode(node, id, bitIndex++)
+            }
+
+            const index = this._indexOf(node, id)
+            if (index >= 0) {
+                const contact = node.contacts.splice(index, 1)[0]
+            }
+
+            return this
+        }
+
+        /**
+         * Splits the node, redistributes contacts to the new nodes, and marks the
+         * node that was split as an inner node of the binary tree of nodes by
+         * setting this.root.contacts = null
+         *
+         * @param  {Object} node     node for splitting
+         * @param  {Number} bitIndex the bitIndex to which byte to check in the
+         *                           Uint8Array for navigating the binary tree
+         */
+        this._split = function (node, bitIndex) {
+            node.left = this.createNode()
+            node.right = this.createNode()
+
+            // redistribute existing contacts amongst the two newly created nodes
+            for (const contact of node.contacts) {
+                this._determineNode(node, contact.id, bitIndex).contacts.push(contact)
+            }
+
+            node.contacts = null // mark as inner tree node
+
+            // don't split the "far away" node
+            // we check where the local node would end up and mark the other one as
+            // "dontSplit" (i.e. "far away")
+            const detNode = this._determineNode(node, this.localNodeId, bitIndex)
+            const otherNode = node.left === detNode ? node.right : node.left
+            otherNode.dontSplit = true
+        }
+
+        /**
+         * Returns all the contacts contained in the tree as an array.
+         * If this is a leaf, return a copy of the bucket. `slice` is used so that we
+         * don't accidentally leak an internal reference out that might be
+         * accidentally misused. If this is not a leaf, return the union of the low
+         * and high branches (themselves also as arrays).
+         *
+         * @return {Array} All of the contacts in the tree, as an array
+         */
+        this.toArray = function () {
+            let result = []
+            for (const nodes = [this.root]; nodes.length > 0;) {
+                const node = nodes.pop()
+                if (node.contacts === null) nodes.push(node.right, node.left)
+                else result = result.concat(node.contacts)
+            }
+            return result
+        }
+
+        /**
+         * Updates the contact selected by the arbiter.
+         * If the selection is our old contact and the candidate is some new contact
+         * then the new contact is abandoned (not added).
+         * If the selection is our old contact and the candidate is our old contact
+         * then we are refreshing the contact and it is marked as most recently
+         * contacted (by being moved to the right/end of the bucket array).
+         * If the selection is our new contact, the old contact is removed and the new
+         * contact is marked as most recently contacted.
+         *
+         * @param  {Object} node    internal object that has 2 leafs: left and right
+         * @param  {Number} index   the index in the bucket where contact exists
+         *                          (index has already been computed in a previous
+         *                          calculation)
+         * @param  {Object} contact The contact object to update.
+         */
+        this._update = function (node, index, contact) {
+            // sanity check
+            if (!this.arrayEquals(node.contacts[index].id, contact.id)) {
+                throw new Error('wrong index for _update')
+            }
+
+            const incumbent = node.contacts[index]
+            const selection = this.arbiter(incumbent, contact)
+            // if the selection is our old contact and the candidate is some new
+            // contact, then there is nothing to do
+            if (selection === incumbent && incumbent !== contact) return
+
+            node.contacts.splice(index, 1) // remove old contact
+            node.contacts.push(selection) // add more recent contact version
+
+        }
     }
-
-    /**
-     * Counts the total number of contacts in the tree.
-     *
-     * @return {Number} The number of contacts held in the tree
-     */
-    this.count = function () {
-      // return this.toArray().length
-      let count = 0
-      for (const nodes = [this.root]; nodes.length > 0;) {
-        const node = nodes.pop()
-        if (node.contacts === null) nodes.push(node.right, node.left)
-        else count += node.contacts.length
-      }
-      return count
-    }
-
-    /**
-     * Determines whether the id at the bitIndex is 0 or 1.
-     * Return left leaf if `id` at `bitIndex` is 0, right leaf otherwise
-     *
-     * @param  {Object} node     internal object that has 2 leafs: left and right
-     * @param  {Uint8Array} id   Id to compare localNodeId with.
-     * @param  {Number} bitIndex Integer (Default: 0) The bit index to which bit
-     *                           to check in the id Uint8Array.
-     * @return {Object}          left leaf if id at bitIndex is 0, right leaf otherwise.
-     */
-    this._determineNode = function (node, id, bitIndex) {
-      // *NOTE* remember that id is a Uint8Array and has granularity of
-      // bytes (8 bits), whereas the bitIndex is the bit index (not byte)
-
-      // id's that are too short are put in low bucket (1 byte = 8 bits)
-      // (bitIndex >> 3) finds how many bytes the bitIndex describes
-      // bitIndex % 8 checks if we have extra bits beyond byte multiples
-      // if number of bytes is <= no. of bytes described by bitIndex and there
-      // are extra bits to consider, this means id has less bits than what
-      // bitIndex describes, id therefore is too short, and will be put in low
-      // bucket
-      const bytesDescribedByBitIndex = bitIndex >> 3
-      const bitIndexWithinByte = bitIndex % 8
-      if ((id.length <= bytesDescribedByBitIndex) && (bitIndexWithinByte !== 0)) {
-        return node.left
-      }
-
-      const byteUnderConsideration = id[bytesDescribedByBitIndex]
-
-      // byteUnderConsideration is an integer from 0 to 255 represented by 8 bits
-      // where 255 is 11111111 and 0 is 00000000
-      // in order to find out whether the bit at bitIndexWithinByte is set
-      // we construct (1 << (7 - bitIndexWithinByte)) which will consist
-      // of all bits being 0, with only one bit set to 1
-      // for example, if bitIndexWithinByte is 3, we will construct 00010000 by
-      // (1 << (7 - 3)) -> (1 << 4) -> 16
-      if (byteUnderConsideration & (1 << (7 - bitIndexWithinByte))) {
-        return node.right
-      }
-
-      return node.left
-    }
-
-    /**
-     * Get a contact by its exact ID.
-     * If this is a leaf, loop through the bucket contents and return the correct
-     * contact if we have it or null if not. If this is an inner node, determine
-     * which branch of the tree to traverse and repeat.
-     *
-     * @param  {Uint8Array} id The ID of the contact to fetch.
-     * @return {Object|Null}   The contact if available, otherwise null
-     */
-    this.get = function (id) {
-      this.ensureInt8('id', id)
-
-      let bitIndex = 0
-
-      let node = this.root
-      while (node.contacts === null) {
-        node = this._determineNode(node, id, bitIndex++)
-      }
-
-      // index of uses contact id for matching
-      const index = this._indexOf(node, id)
-      return index >= 0 ? node.contacts[index] : null
-    }
-
-    /**
-     * Returns the index of the contact with provided
-     * id if it exists, returns -1 otherwise.
-     *
-     * @param  {Object} node    internal object that has 2 leafs: left and right
-     * @param  {Uint8Array} id  Contact node id.
-     * @return {Number}         Integer Index of contact with provided id if it
-     *                          exists, -1 otherwise.
-     */
-    this._indexOf = function (node, id) {
-      for (let i = 0; i < node.contacts.length; ++i) {
-        if (this.arrayEquals(node.contacts[i].id, id)) return i
-      }
-
-      return -1
-    }
-
-    /**
-     * Removes contact with the provided id.
-     *
-     * @param  {Uint8Array} id The ID of the contact to remove.
-     * @return {Object}        The k-bucket itself.
-     */
-    this.remove = function (id) {
-      this.ensureInt8('the id as parameter 1', id)
-
-      let bitIndex = 0
-      let node = this.root
-
-      while (node.contacts === null) {
-        node = this._determineNode(node, id, bitIndex++)
-      }
-
-      const index = this._indexOf(node, id)
-      if (index >= 0) {
-        const contact = node.contacts.splice(index, 1)[0]
-      }
-
-      return this
-    }
-
-    /**
-     * Splits the node, redistributes contacts to the new nodes, and marks the
-     * node that was split as an inner node of the binary tree of nodes by
-     * setting this.root.contacts = null
-     *
-     * @param  {Object} node     node for splitting
-     * @param  {Number} bitIndex the bitIndex to which byte to check in the
-     *                           Uint8Array for navigating the binary tree
-     */
-    this._split = function (node, bitIndex) {
-      node.left = this.createNode()
-      node.right = this.createNode()
-
-      // redistribute existing contacts amongst the two newly created nodes
-      for (const contact of node.contacts) {
-        this._determineNode(node, contact.id, bitIndex).contacts.push(contact)
-      }
-
-      node.contacts = null // mark as inner tree node
-
-      // don't split the "far away" node
-      // we check where the local node would end up and mark the other one as
-      // "dontSplit" (i.e. "far away")
-      const detNode = this._determineNode(node, this.localNodeId, bitIndex)
-      const otherNode = node.left === detNode ? node.right : node.left
-      otherNode.dontSplit = true
-    }
-
-    /**
-     * Returns all the contacts contained in the tree as an array.
-     * If this is a leaf, return a copy of the bucket. `slice` is used so that we
-     * don't accidentally leak an internal reference out that might be
-     * accidentally misused. If this is not a leaf, return the union of the low
-     * and high branches (themselves also as arrays).
-     *
-     * @return {Array} All of the contacts in the tree, as an array
-     */
-    this.toArray = function () {
-      let result = []
-      for (const nodes = [this.root]; nodes.length > 0;) {
-        const node = nodes.pop()
-        if (node.contacts === null) nodes.push(node.right, node.left)
-        else result = result.concat(node.contacts)
-      }
-      return result
-    }
-
-    /**
-     * Updates the contact selected by the arbiter.
-     * If the selection is our old contact and the candidate is some new contact
-     * then the new contact is abandoned (not added).
-     * If the selection is our old contact and the candidate is our old contact
-     * then we are refreshing the contact and it is marked as most recently
-     * contacted (by being moved to the right/end of the bucket array).
-     * If the selection is our new contact, the old contact is removed and the new
-     * contact is marked as most recently contacted.
-     *
-     * @param  {Object} node    internal object that has 2 leafs: left and right
-     * @param  {Number} index   the index in the bucket where contact exists
-     *                          (index has already been computed in a previous
-     *                          calculation)
-     * @param  {Object} contact The contact object to update.
-     */
-    this._update = function (node, index, contact) {
-      // sanity check
-      if (!this.arrayEquals(node.contacts[index].id, contact.id)) {
-        throw new Error('wrong index for _update')
-      }
-
-      const incumbent = node.contacts[index]
-      const selection = this.arbiter(incumbent, contact)
-      // if the selection is our old contact and the candidate is some new
-      // contact, then there is nothing to do
-      if (selection === incumbent && incumbent !== contact) return
-
-      node.contacts.splice(index, 1) // remove old contact
-      node.contacts.push(selection) // add more recent contact version
-
-    }
-  }
-
 </script>
 <script id="compactIDB">
-  /* Compact IndexedDB operations */
+    /* Compact IndexedDB operations */
 
-  window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
-  window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
-  window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
+    window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
+    window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
+    window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
 
-  if (!window.indexedDB)
-    window.alert("Your browser doesn't support a stable version of IndexedDB.")
+    if (!window.indexedDB)
+        window.alert("Your browser doesn't support a stable version of IndexedDB.")
 
-  const compactIDB = {
+    const compactIDB = {
 
-    setDefaultDB: function (dbName) {
-      this.dbName = dbName;
-    },
+        setDefaultDB: function (dbName) {
+            this.dbName = dbName;
+        },
 
-    initDB: function (dbName, objectStores = {}) {
-      return new Promise((resolve, reject) => {
-        this.dbName = this.dbName || dbName;
-        var idb = indexedDB.open(dbName);
-        idb.onerror = (event) => {
-          reject("Error in opening IndexedDB!");
-        };
-        idb.onupgradeneeded = (event) => {
-          var db = event.target.result;
-          for (obs in objectStores) {
-            var objectStore = db.createObjectStore(obs, objectStores[obs].options || {});
-            if (objectStores[obs].indexes && typeof objectStores[obs].indexes === 'object')
-              for (i in objectStores[obs].indexes)
-                objectStore.createIndex(i, i, objectStores[obs].indexes[i] || {});
-          }
+        initDB: function (dbName, objectStores = {}) {
+            return new Promise((resolve, reject) => {
+                this.dbName = this.dbName || dbName;
+                var idb = indexedDB.open(dbName);
+                idb.onerror = (event) => {
+                    reject("Error in opening IndexedDB!");
+                };
+                idb.onupgradeneeded = (event) => {
+                    var db = event.target.result;
+                    for (obs in objectStores) {
+                        var objectStore = db.createObjectStore(obs, objectStores[obs].options ||
+                        {});
+                        if (objectStores[obs].indexes && typeof objectStores[obs].indexes ===
+                            'object')
+                            for (i in objectStores[obs].indexes)
+                                objectStore.createIndex(i, i, objectStores[obs].indexes[i] || {});
+                    }
+                }
+                idb.onsuccess = (event) => {
+                    var db = event.target.result;
+                    if (JSON.stringify(Object.values(db.objectStoreNames).sort()) === JSON
+                        .stringify(Object.keys(
+                            objectStores).sort()))
+                        resolve("Initiated IndexedDB");
+                    else
+                        reject("IndexedDB already exist with different ObjectStores!");
+                    db.close();
+                }
+            });
+        },
+
+        openDB: function (dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                var idb = indexedDB.open(dbName);
+                idb.onerror = (event) => reject("Error in opening IndexedDB!");
+                idb.onsuccess = (event) => resolve(event.target.result);
+            });
+        },
+
+        deleteDB: function (dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                var deleteReq = indexedDB.deleteDatabase(dbName);;
+                deleteReq.onerror = (event) => reject("Error deleting database!");
+                deleteReq.onsuccess = (event) => resolve("Database deleted successfully");
+            });
+        },
+
+        writeData: function (obsName, data, key = false, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
+                    let writeReq = (key ? obs.put(data, key) : obs.put(data));
+                    writeReq.onsuccess = (evt) => resolve(`Write data Successful`);
+                    writeReq.onerror = (evt) => reject(
+                        `Write data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
+        addData: function (obsName, data, key = false, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
+                    let addReq = (key ? obs.add(data, key) : obs.add(data));
+                    addReq.onsuccess = (evt) => resolve(`Add data successful`);
+                    addReq.onerror = (evt) => reject(
+                        `Add data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
+        removeData: function (obsName, key, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
+                    let delReq = obs.delete(key);
+                    delReq.onsuccess = (evt) => resolve(`Removed Data ${key}`);
+                    delReq.onerror = (evt) => reject(
+                        `Remove data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
+        readData: function (obsName, key, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readonly").objectStore(obsName);
+                    let getReq = obs.get(key);
+                    getReq.onsuccess = (evt) => resolve(evt.target.result);
+                    getReq.onerror = (evt) => reject(
+                        `Read data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
+        readAllData: function (obsName, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readonly").objectStore(obsName);
+                    var tmpResult = {}
+                    let curReq = obs.openCursor();
+                    curReq.onsuccess = (evt) => {
+                        var cursor = evt.target.result;
+                        if (cursor) {
+                            tmpResult[cursor.primaryKey] = cursor.value;
+                            cursor.continue();
+                        } else
+                            resolve(tmpResult);
+                    }
+                    curReq.onerror = (evt) => reject(
+                        `Read-All data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
+        searchData: function (obsName, patternEval, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readonly").objectStore(obsName);
+                    var filteredResult = {}
+                    let curReq = obs.openCursor();
+                    curReq.onsuccess = (evt) => {
+                        var cursor = evt.target.result;
+                        if (cursor) {
+                            if (patternEval(cursor.primaryKey, cursor.value))
+                                filteredResult[cursor.primaryKey] = cursor.value;
+                            cursor.continue();
+                        } else
+                            resolve(filteredResult);
+                    }
+                    curReq.onerror = (evt) => reject(
+                        `Search unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
+                        );
+                    db.close();
+                }).catch(error => reject(error));
+            });
         }
-        idb.onsuccess = (event) => {
-          var db = event.target.result;
-          if (JSON.stringify(Object.values(db.objectStoreNames).sort()) === JSON.stringify(Object.keys(
-              objectStores).sort()))
-            resolve("Initiated IndexedDB");
-          else
-            reject("IndexedDB already exist with different ObjectStores!");
-          db.close();
-        }
-      });
-    },
-
-    openDB: function (dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        var idb = indexedDB.open(dbName);
-        idb.onerror = (event) => reject("Error in opening IndexedDB!");
-        idb.onsuccess = (event) => resolve(event.target.result);
-      });
-    },
-
-    deleteDB: function (dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        var deleteReq = indexedDB.deleteDatabase(dbName);;
-        deleteReq.onerror = (event) => reject("Error deleting database!");
-        deleteReq.onsuccess = (event) => resolve("Database deleted successfully");
-      });
-    },
-
-    writeData: function (obsName, data, key = false, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
-          let writeReq = (key ? obs.put(data, key) : obs.put(data));
-          writeReq.onsuccess = (evt) => resolve(`Write data Successful`);
-          writeReq.onerror = (evt) => reject(
-            `Write data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
-    },
-
-    addData: function (obsName, data, key = false, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
-          let addReq = (key ? obs.add(data, key) : obs.add(data));
-          addReq.onsuccess = (evt) => resolve(`Add data successful`);
-          addReq.onerror = (evt) => reject(
-            `Add data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
-    },
-
-    removeData: function (obsName, key, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
-          let delReq = obs.delete(key);
-          delReq.onsuccess = (evt) => resolve(`Removed Data ${key}`);
-          delReq.onerror = (evt) => reject(
-            `Remove data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
-    },
-
-    readData: function (obsName, key, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readonly").objectStore(obsName);
-          let getReq = obs.get(key);
-          getReq.onsuccess = (evt) => resolve(evt.target.result);
-          getReq.onerror = (evt) => reject(
-            `Read data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
-    },
-
-    readAllData: function (obsName, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readonly").objectStore(obsName);
-          var tmpResult = {}
-          let curReq = obs.openCursor();
-          curReq.onsuccess = (evt) => {
-            var cursor = evt.target.result;
-            if (cursor) {
-              tmpResult[cursor.primaryKey] = cursor.value;
-              cursor.continue();
-            } else
-              resolve(tmpResult);
-          }
-          curReq.onerror = (evt) => reject(
-            `Read-All data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
-    },
-
-    searchData: function (obsName, patternEval, dbName = this.dbName) {
-      return new Promise((resolve, reject) => {
-        this.openDB(dbName).then(db => {
-          var obs = db.transaction(obsName, "readonly").objectStore(obsName);
-          var filteredResult = {}
-          let curReq = obs.openCursor();
-          curReq.onsuccess = (evt) => {
-            var cursor = evt.target.result;
-            if (cursor) {
-              if (patternEval(cursor.primaryKey, cursor.value))
-                filteredResult[cursor.primaryKey] = cursor.value;
-              cursor.continue();
-            } else
-              resolve(filteredResult);
-          }
-          curReq.onerror = (evt) => reject(
-            `Search unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`);
-          db.close();
-        }).catch(error => reject(error));
-      });
     }
-  }
 </script>
 <script id="floCloudAPI">
     /* FLO Cloud operations to send/request application data*/
     const floCloudAPI = {
 
-        util:{
+        util: {
 
             lastCommit: {},
 
-            resetData: function(dataSet){
-                try{
+            resetData: function (dataSet) {
+                try {
                     dataSet = JSON.parse(dataSet);
                     console.log(dataSet)
-                    for(vc in dataSet){
+                    for (vc in dataSet) {
                         var message = dataSet[vc].message;
-                        if(message.reset){
+                        if (message.reset) {
                             floGlobals.appObjects[message.object] = message.reset
                             floGlobals.vectorClock[message.object] = vc
-                            compactIDB.writeData("appObjects", floGlobals.appObjects[message.object], message.object)
+                            compactIDB.writeData("appObjects", floGlobals.appObjects[message.object], message
+                                .object)
                             compactIDB.writeData("vectorClock", vc, message.object)
                         }
                     }
-                }catch(error){
+                } catch (error) {
                     console.error(error)
                 }
             },
 
-            updateData: function(dataSet){
-                try{
+            updateData: function (dataSet) {
+                try {
                     dataSet = JSON.parse(dataSet);
                     console.log(dataSet)
-                    for(vc in dataSet){
-                            var message = dataSet[vc].message;
-                            if(message.diff){
-                                floGlobals.appObjects[message.object] = mergeDifference(floGlobals.appObjects[message.object], message.diff)
-                                compactIDB.writeData("appObjects",floGlobals.appObjects[message.object], message.object)
-                            }
+                    for (vc in dataSet) {
+                        var message = dataSet[vc].message;
+                        if (message.diff) {
+                            floGlobals.appObjects[message.object] = mergeDifference(floGlobals.appObjects[
+                                message.object], message.diff)
+                            compactIDB.writeData("appObjects", floGlobals.appObjects[message.object], message
+                                .object)
+                        }
                         floGlobals.vectorClock[message.object] = vc
                         compactIDB.writeData("vectorClock", vc, message.object)
                     }
-                }catch(error){
+                } catch (error) {
                     console.error(error)
                 }
             },
-        
-            storeGeneralData: function(filterStr, dataSet){
-                try{
+
+            storeGeneralData: function (filterStr, dataSet) {
+                try {
                     dataSet = JSON.parse(dataSet);
                     console.log(dataSet)
-                    if(!Array.isArray(floGlobals.generalData[filterStr]))
-                        floGlobals.generalData[filterStr] = [] 
-                    for(vc in dataSet){
-                        floGlobals.generalData[filterStr].push({sender: dataSet[vc].senderID, vectorClock: vc, message: dataSet[vc].message})
+                    if (!Array.isArray(floGlobals.generalData[filterStr]))
+                        floGlobals.generalData[filterStr] = []
+                    for (vc in dataSet) {
+                        floGlobals.generalData[filterStr].push({
+                            sender: dataSet[vc].senderID,
+                            vectorClock: vc,
+                            message: dataSet[vc].message
+                        })
                         compactIDB.writeData("generalData", floGlobals.generalData[filterStr], filterStr)
                         floGlobals.generalVC[filterStr] = vc
                         compactIDB.writeData("generalVC", vc, filterStr)
                     }
-                }catch(error){
+                } catch (error) {
                     console.error(error)
                 }
             }
         },
 
         //send Any message to supernode cloud storage
-        sendApplicationData: function(message, type, options = {}){
-            return new Promise((resolve,reject) => {
+        sendApplicationData: function (message, type, options = {}) {
+            return new Promise((resolve, reject) => {
                 var data = {
-                    senderID : myFloID,
+                    senderID: myFloID,
                     receiverID: options.receiverID || floGlobals.adminID,
-                    pubKey : myPubKey,
-                    message : message,
+                    pubKey: myPubKey,
+                    message: message,
                     sign: floCrypto.signData(JSON.stringify(message), myPrivKey),
-                    application : options.application || floGlobals.application,
+                    application: options.application || floGlobals.application,
                     type: type,
                     comment: options.comment || ""
                 }
@@ -8363,8 +8396,8 @@ Bitcoin.Util = {
         },
 
         //request any data from supernode cloud
-        requestApplicationData: function(options = {}){
-            return new Promise((resolve,reject) => {
+        requestApplicationData: function (options = {}) {
+            return new Promise((resolve, reject) => {
                 var request = {
                     receiverID: options.receiverID || floGlobals.adminID,
                     senderIDs: options.senderIDs || undefined,
@@ -8383,8 +8416,8 @@ Bitcoin.Util = {
         },
 
         //send General Data
-        sendGeneralData: function(message, type, options = {}){
-            return new Promise((resolve,reject) => {
+        sendGeneralData: function (message, type, options = {}) {
+            return new Promise((resolve, reject) => {
                 this.sendApplicationData(message, type, options)
                     .then(result => resolve(result))
                     .catch(error => reject(error))
@@ -8392,11 +8425,16 @@ Bitcoin.Util = {
         },
 
         //request General Data
-        requestGeneralData: function(type, options = {}){
-            return new Promise((resolve,reject) => {
-                var filterStr = JSON.stringify({application: options.application || floGlobals.application, type: type, comment: options.comment})
+        requestGeneralData: function (type, options = {}) {
+            return new Promise((resolve, reject) => {
+                var filterStr = JSON.stringify({
+                    application: options.application || floGlobals.application,
+                    type: type,
+                    comment: options.comment
+                })
                 options.type = type
-                options.lowerVectorClock = options.lowerVectorClock || floGlobals.generalVC[filterStr] + 1
+                options.lowerVectorClock = options.lowerVectorClock || floGlobals.generalVC[filterStr] +
+                    1
                 this.requestApplicationData(options).then(dataSet => {
                     this.util.storeGeneralData(filterStr, dataSet)
                     resolve('General Data Updated')
@@ -8405,58 +8443,64 @@ Bitcoin.Util = {
         },
 
         //request an object data from supernode cloud
-        requestObjectData: function(objectName, options = {}){
-            return new Promise((resolve,reject) => {
+        requestObjectData: function (objectName, options = {}) {
+            return new Promise((resolve, reject) => {
                 var request = {
                     receiverID: options.receiverID || floGlobals.adminID,
-                    senderIDs: (options.senderIDs === false) ? false: options.senderIDs || floGlobals.subAdmins,
+                    senderIDs: (options.senderIDs === false) ? false : options.senderIDs ||
+                        floGlobals.subAdmins,
                     application: options.application || floGlobals.application,
                     comment: options.comment,
                     type: `${objectName}@Reset`,
-                    lowerVectorClock: floGlobals.vectorClock[objectName]+1,
+                    lowerVectorClock: floGlobals.vectorClock[objectName] + 1,
                     mostRecent: true
                 }
-                floSupernode.requestData(JSON.stringify(request),request.receiverID).then(dataSet => {
+                floSupernode.requestData(JSON.stringify(request), request.receiverID).then(dataSet => {
                     this.util.resetData(dataSet)
                     request.type = `${objectName}@Update`
-                    request.lowerVectorClock = floGlobals.vectorClock[objectName]+1
+                    request.lowerVectorClock = floGlobals.vectorClock[objectName] + 1
                     request.mostRecent = false
-                    floSupernode.requestData(JSON.stringify(request), request.receiverID).then(dataSet => {
-                        this.util.updateData(dataSet)
-                        this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
-                        resolve('Object Data Updated')
-                    }).catch(error => reject(error))
+                    floSupernode.requestData(JSON.stringify(request), request.receiverID).then(
+                        dataSet => {
+                            this.util.updateData(dataSet)
+                            this.util.lastCommit[objectName] = JSON.stringify(floGlobals
+                                .appObjects[objectName])
+                            resolve('Object Data Updated')
+                        }).catch(error => reject(error))
                 }).catch(error => reject(error))
             })
         },
 
         //reset or initialize an object and send it to cloud
-        resetObjectData: function(objectName, options = {}){
-            return new Promise((resolve,reject) => {
+        resetObjectData: function (objectName, options = {}) {
+            return new Promise((resolve, reject) => {
                 var message = {
-                    division: options.division || floGlobals.division, 
-                    object: objectName, 
-                    vectorClock: floGlobals.vectorClock[objectName], 
+                    division: options.division || floGlobals.division,
+                    object: objectName,
+                    vectorClock: floGlobals.vectorClock[objectName],
                     reset: floGlobals.appObjects[objectName]
                 }
                 this.sendApplicationData(message, `${objectName}@Reset`, options).then(result => {
-                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
+                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[
+                        objectName])
                     resolve(result)
                 }).catch(error => reject(error))
             })
         },
 
         //update the diff and send it to cloud
-        updateObjectData: function(objectName, options = {}){
-            return new Promise((resolve,reject) => {
+        updateObjectData: function (objectName, options = {}) {
+            return new Promise((resolve, reject) => {
                 var message = {
                     division: options.division || floGlobals.division,
-                    object: objectName, 
+                    object: objectName,
                     vectorClock: floGlobals.vectorClock[objectName],
-                    diff: findDifference(JSON.parse(this.util.lastCommit[objectName]), floGlobals.appObjects[objectName])
+                    diff: findDifference(JSON.parse(this.util.lastCommit[objectName]), floGlobals
+                        .appObjects[objectName])
                 }
                 this.sendApplicationData(message, `${objectName}@Update`, options).then(result => {
-                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[objectName])
+                    this.util.lastCommit[objectName] = JSON.stringify(floGlobals.appObjects[
+                        objectName])
                     resolve(result)
                 }).catch(error => reject(error))
             })
@@ -8467,120 +8511,144 @@ Bitcoin.Util = {
     /* General functions for FLO Dapps*/
     const floDapps = {
 
-        util:{
-            appObs:{},
+        util: {
+            appObs: {},
 
-            initIndexedDB: function(){
+            initIndexedDB: function () {
                 return new Promise((resolve, reject) => {
                     var storageList = floGlobals.storageList;
                     var obj = {
                         //general
-                        lastTx:{},
+                        lastTx: {},
                         //supernode (cloud list)
-                        supernodes:{
-                            indexes:{ uri:null, pubKey:null }
+                        supernodes: {
+                            indexes: {
+                                uri: null,
+                                pubKey: null
+                            }
                         },
                         //login credentials
-                        credentials:{},
+                        credentials: {},
                         //for Dapps
-                        subAdmins:{},
-                        appObjects:{},
-                        vectorClock:{},
-                        generalData:{},
-                        generalVC:{}
+                        subAdmins: {},
+                        appObjects: {},
+                        vectorClock: {},
+                        generalData: {},
+                        generalVC: {}
                     }
                     //add other given objectStores
-                    for(o in this.appObs)
-                        if(!(o in obj))
+                    for (o in this.appObs)
+                        if (!(o in obj))
                             obj[o] = this.appObs[o]
                     compactIDB.initDB(floGlobals.application, obj).then(result => {
                         resolve("IndexedDB App Storage Initated Successfully")
                     }).catch(error => reject(error));
                 })
             },
-            
-            privKeyInput: function(){
+
+            privKeyInput: function () {
                 return new Promise((resolve, reject) => {
                     var privKey = prompt("Enter Private Key: ")
-                    if(privKey === null)
+                    if (privKey === null)
                         reject(null)
                     else
                         resolve(privKey)
                 })
             },
 
-            startUpFunctions:{
+            startUpFunctions: {
 
-                readSupernodeListFromAPI: function(){
-                    return new Promise((resolve,reject) => {
-                        compactIDB.readData("lastTx",floGlobals.SNStorageID).then(lastTx => {
-                            floBlockchainAPI.readData(floGlobals.SNStorageID,{ignoreOld:lastTx,sentOnly:true,pattern:"SuperNodeStorage"}).then(result => {
-                                for(var i=result.data.length-1;i>=0;i--){
-                                    var content = JSON.parse(result.data[i]).SuperNodeStorage;
-                                    for(sn in content.removeNodes)
-                                        compactIDB.removeData("supernodes",sn);
-                                    for(sn in content.addNodes)
-                                        compactIDB.writeData("supernodes",content.addNodes[sn],sn);
+                readSupernodeListFromAPI: function () {
+                    return new Promise((resolve, reject) => {
+                        compactIDB.readData("lastTx", floGlobals.SNStorageID).then(lastTx => {
+                            floBlockchainAPI.readData(floGlobals.SNStorageID, {
+                                ignoreOld: lastTx,
+                                sentOnly: true,
+                                pattern: "SuperNodeStorage"
+                            }).then(result => {
+                                for (var i = result.data.length - 1; i >= 0; i--) {
+                                    var content = JSON.parse(result.data[i])
+                                        .SuperNodeStorage;
+                                    for (sn in content.removeNodes)
+                                        compactIDB.removeData("supernodes", sn);
+                                    for (sn in content.addNodes)
+                                        compactIDB.writeData("supernodes", content
+                                            .addNodes[sn], sn);
                                 }
-                                compactIDB.writeData("lastTx",result.totalTxs,floGlobals.SNStorageID);
+                                compactIDB.writeData("lastTx", result.totalTxs,
+                                    floGlobals.SNStorageID);
                                 compactIDB.readAllData("supernodes").then(result => {
                                     floGlobals.supernodes = result;
-                                    
-                                    floSupernode.kBucket.launch(Object.keys(floGlobals.supernodes),floGlobals.SNStorageID)
-                                        .then(result => resolve("Loaded Supernode list\n"+result))                   
+
+                                    floSupernode.kBucket.launch(Object.keys(
+                                                floGlobals.supernodes),
+                                            floGlobals.SNStorageID)
+                                        .then(result => resolve(
+                                            "Loaded Supernode list\n" +
+                                            result))
                                 })
                             })
                         }).catch(error => reject(error))
                     })
                 },
 
-                readSubAdminListFromAPI: function(){
-                    return new Promise((resolve,reject) => {
-                        compactIDB.readData("lastTx",floGlobals.adminID).then(lastTx => {
-                            floBlockchainAPI.readData(floGlobals.adminID,{ignoreOld:lastTx,sentOnly:true,pattern:floGlobals.application}).then(result => {
-                                for(var i=result.data.length-1;i>=0;i--){
-                                    var content = JSON.parse(result.data[i])[floGlobals.application];
-                                    if(Array.isArray(content.removeSubAdmin))
-                                        for(var j = 0; j < content.removeSubAdmin.length; j++)
-                                            compactIDB.removeData("subAdmins",content.removeSubAdmin[j]);
-                                    if(Array.isArray(content.addSubAdmin))
-                                        for(var k = 0; k < content.addSubAdmin.length; k++)
-                                            compactIDB.writeData("subAdmins",true,content.addSubAdmin[k]);
+                readSubAdminListFromAPI: function () {
+                    return new Promise((resolve, reject) => {
+                        compactIDB.readData("lastTx", floGlobals.adminID).then(lastTx => {
+                            floBlockchainAPI.readData(floGlobals.adminID, {
+                                ignoreOld: lastTx,
+                                sentOnly: true,
+                                pattern: floGlobals.application
+                            }).then(result => {
+                                for (var i = result.data.length - 1; i >= 0; i--) {
+                                    var content = JSON.parse(result.data[i])[floGlobals
+                                        .application];
+                                    if (Array.isArray(content.removeSubAdmin))
+                                        for (var j = 0; j < content.removeSubAdmin
+                                            .length; j++)
+                                            compactIDB.removeData("subAdmins", content
+                                                .removeSubAdmin[j]);
+                                    if (Array.isArray(content.addSubAdmin))
+                                        for (var k = 0; k < content.addSubAdmin
+                                            .length; k++)
+                                            compactIDB.writeData("subAdmins", true,
+                                                content.addSubAdmin[k]);
                                 }
-                                compactIDB.writeData("lastTx",result.totalTxs,floGlobals.adminID);
+                                compactIDB.writeData("lastTx", result.totalTxs,
+                                    floGlobals.adminID);
                                 compactIDB.readAllData("subAdmins").then(result => {
                                     floGlobals.subAdmins = Object.keys(result);
-                                    resolve("Read subAdmins from blockchain");                    
+                                    resolve("Read subAdmins from blockchain");
                                 })
                             })
                         }).catch(error => reject(error))
                     })
                 },
 
-                loadDataFromIDB: function(){
-                    return new Promise((resolve,reject) => {
+                loadDataFromIDB: function () {
+                    return new Promise((resolve, reject) => {
                         var loadData = ["appObjects", "vectorClock", "generalData", "generalVC"]
                         var promises = []
-                        for(var i = 0; i < loadData.length; i++)
+                        for (var i = 0; i < loadData.length; i++)
                             promises[i] = compactIDB.readAllData(loadData[i])
                         Promise.all(promises).then(results => {
-                            for(var i = 0; i < loadData.length; i++)
+                            for (var i = 0; i < loadData.length; i++)
                                 floGlobals[loadData[i]] = results[i]
                             resolve("Loaded Data from IDB")
                         }).catch(error => reject(error))
                     })
                 },
 
-                getCredentials: function(){
+                getCredentials: function () {
 
-                    var readSharesFromIDB = function(indexArr){
+                    var readSharesFromIDB = function (indexArr) {
                         return new Promise((resolve, reject) => {
                             var promises = []
-                            for(var i = 0; i < indexArr.length; i++)
+                            for (var i = 0; i < indexArr.length; i++)
                                 promises.push(compactIDB.readData('credentials', indexArr[i]))
                             Promise.all(promises).then(shares => {
                                 var secret = floCrypto.retrieveShamirSecret(shares)
-                                if(secret)
+                                if (secret)
                                     resolve(secret)
                                 else
                                     reject("Shares are insufficient or incorrect")
@@ -8588,38 +8656,39 @@ Bitcoin.Util = {
                         })
                     }
 
-                    var writeSharesToIDB = function(shares, i = 0, resultIndexes = []){
+                    var writeSharesToIDB = function (shares, i = 0, resultIndexes = []) {
                         return new Promise((resolve, reject) => {
-                            if(i >= shares.length)
+                            if (i >= shares.length)
                                 return resolve(resultIndexes)
                             var n = floCrypto.randInt(0, 100000)
                             compactIDB.addData("credentials", shares[i], n).then(res => {
                                 resultIndexes.push(n)
-                                writeSharesToIDB(shares, i+1, resultIndexes)
+                                writeSharesToIDB(shares, i + 1, resultIndexes)
                                     .then(result => resolve(result))
                             }).catch(error => {
                                 writeSharesToIDB(shares, i, resultIndexes)
                                     .then(result => resolve(result))
                             })
-                        }) 
+                        })
                     }
 
-                    var getPrivateKeyCredentials = function(){
+                    var getPrivateKeyCredentials = function () {
                         return new Promise((resolve, reject) => {
                             var indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
-                            if(indexArr){
+                            if (indexArr) {
                                 readSharesFromIDB(JSON.parse(indexArr))
                                     .then(result => resolve(result))
                                     .catch(error => reject(error))
-                            }else{
+                            } else {
                                 var privKey;
                                 floDapps.util.privKeyInput().then(result => {
-                                    try{
-                                        if(!result)
+                                    try {
+                                        if (!result)
                                             return reject("Empty Private Key")
-                                        var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(result))
+                                        var floID = floCrypto.getFloIDfromPubkeyHex(
+                                            floCrypto.getPubKeyHex(result))
                                         privKey = result
-                                    }catch(error){
+                                    } catch (error) {
                                         console.error(error)
                                         return reject("Invalid Private Key")
                                     }
@@ -8627,17 +8696,26 @@ Bitcoin.Util = {
                                     console.log(error, "Generating Random Keys")
                                     privKey = floCrypto.generateNewID().privKey
                                 }).finally(_ => {
-                                    var threshold = floCrypto.randInt(10,20)
-                                    writeSharesToIDB(floCrypto.createShamirsSecretShares(privKey, threshold, threshold)).then(resultIndexes =>{
-                                        //store index keys in localStorage
-                                        localStorage.setItem(`${floGlobals.application}#privKey`, JSON.stringify(resultIndexes))
-                                        //also add a dummy privatekey to the IDB
-                                        var randomPrivKey = floCrypto.generateNewID().privKey
-                                        var randomThreshold = floCrypto.randInt(10,20)
-                                        writeSharesToIDB(floCrypto.createShamirsSecretShares(randomPrivKey, randomThreshold, randomThreshold))
-                                        //resolve private Key
-                                        resolve(privKey)
-                                    }).catch(error => reject(error))
+                                    var threshold = floCrypto.randInt(10, 20)
+                                    writeSharesToIDB(floCrypto.createShamirsSecretShares(
+                                        privKey, threshold, threshold)).then(
+                                        resultIndexes => {
+                                            //store index keys in localStorage
+                                            localStorage.setItem(
+                                                `${floGlobals.application}#privKey`,
+                                                JSON.stringify(resultIndexes))
+                                            //also add a dummy privatekey to the IDB
+                                            var randomPrivKey = floCrypto
+                                            .generateNewID().privKey
+                                            var randomThreshold = floCrypto.randInt(10,
+                                                20)
+                                            writeSharesToIDB(floCrypto
+                                                .createShamirsSecretShares(
+                                                    randomPrivKey, randomThreshold,
+                                                    randomThreshold))
+                                            //resolve private Key
+                                            resolve(privKey)
+                                        }).catch(error => reject(error))
                                 })
                             }
                         })
@@ -8652,38 +8730,47 @@ Bitcoin.Util = {
                         }).catch(error => reject(error))
                     })
                 }
-    
+
             },
 
-            callStartUpFunction: function(fname){
+            callStartUpFunction: function (fname) {
                 return new Promise((resolve, reject) => {
                     this.startUpFunctions[fname]().then(result => {
                         this.callStartUpFunction.completed += 1
-                        reactor.dispatchEvent("startUpSuccessLog",`${result}\nCompleted ${this.callStartUpFunction.completed}/${this.callStartUpFunction.total} Startup functions`)
+                        reactor.dispatchEvent("startUpSuccessLog",
+                            `${result}\nCompleted ${this.callStartUpFunction.completed}/${this.callStartUpFunction.total} Startup functions`
+                            )
                         resolve(true)
                     }).catch(error => {
                         this.callStartUpFunction.failed += 1
-                        reactor.dispatchEvent("startUpErrorLog",`${error}\nFailed ${this.callStartUpFunction.failed}/${this.callStartUpFunction.total} Startup functions`)
+                        reactor.dispatchEvent("startUpErrorLog",
+                            `${error}\nFailed ${this.callStartUpFunction.failed}/${this.callStartUpFunction.total} Startup functions`
+                            )
                         reject(false)
                     })
                 })
             },
 
-            getFilterString: function(type, options = {}){
-                var filterStr = JSON.stringify({application: options.application || floGlobals.application, type: type, comment: options.comment})
+            getFilterString: function (type, options = {}) {
+                var filterStr = JSON.stringify({
+                    application: options.application || floGlobals.application,
+                    type: type,
+                    comment: options.comment
+                })
                 return filterStr
             }
         },
-        
-        launchStartUp: function(){
-            return new Promise((resolve,reject) => {
+
+        launchStartUp: function () {
+            return new Promise((resolve, reject) => {
                 this.util.initIndexedDB().then(log => {
                     console.log(log)
-                    this.util.callStartUpFunction.total = Object.keys(this.util.startUpFunctions).length
+                    this.util.callStartUpFunction.total = Object.keys(this.util
+                        .startUpFunctions).length
                     this.util.callStartUpFunction.completed = 0
                     this.util.callStartUpFunction.failed = 0
                     var promises = []
-                    for(fn in this.util.startUpFunctions)
+                    for (fn in this.util.startUpFunctions)
                         promises.push(this.util.callStartUpFunction(fn))
                     Promise.all(promises)
                         .then(results => resolve('App Startup finished successful'))
@@ -8691,67 +8778,67 @@ Bitcoin.Util = {
                 })
             })
         },
-        
-        addStartUpFunction: function(fname, fn){
-            if(fname in this.util.startUpFunctions)
-                throw(`Function ${fname} already defined`)
+
+        addStartUpFunction: function (fname, fn) {
+            if (fname in this.util.startUpFunctions)
+                throw (`Function ${fname} already defined`)
             this.util.startUpFunctions[fname] = fn;
         },
 
-        setCustomPrivKeyInput: function(customFn){
+        setCustomPrivKeyInput: function (customFn) {
             this.util.privKeyInput = customFn
         },
 
-        setAppObjectStores: function(appObs){
+        setAppObjectStores: function (appObs) {
             this.util.appObs = appObs
         },
-        
-        manageSubAdmins(adminPrivKey, addList, rmList){
+
+        manageSubAdmins(adminPrivKey, addList, rmList) {
             return new Promise((resolve, reject) => {
-                if(!Array.isArray(addList)) addList = undefined;
-                if(!Array.isArray(rmList)) rmList = undefined;
+                if (!Array.isArray(addList)) addList = undefined;
+                if (!Array.isArray(rmList)) rmList = undefined;
                 var floData = {
-                    [floGlobals.application] : {
-                        addSubAdmin : addList,
+                    [floGlobals.application]: {
+                        addSubAdmin: addList,
                         removeSubAdmin: rmList,
                     }
                 }
                 var floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(adminPrivKey))
-                if(floID != floGlobals.adminID)
+                if (floID != floGlobals.adminID)
                     reject('Access Denied for Admin privilege')
                 else
                     floBlockchainAPI.writeData(floID, JSON.stringify(floData), adminPrivKey)
-                        .then(result => resolve(['Updated SubAdmin List', result]))
-                        .catch(error => reject(error))
+                    .then(result => resolve(['Updated SubAdmin List', result]))
+                    .catch(error => reject(error))
             })
         },
 
-        clearCredentials: function(){
+        clearCredentials: function () {
             var indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
-            if(!indexArr)
+            if (!indexArr)
                 return `privKey credentials not found!`
             indexArr = JSON.parse(indexArr)
             indexArr.forEach(i => compactIDB.removeData('credentials', i))
             localStorage.removeItem(`${floGlobals.application}#privKey`)
-                return `privKey credentials deleted!`
+            return `privKey credentials deleted!`
         },
 
-        objectDataMapper: function(object, path, data){
-                var resObject = JSON.parse(JSON.stringify(object))
-                var pos = resObject;
-                path.forEach(p => pos = pos[p])
-                if(Array.isArray(pos)){
-                    pos.push(data)
-                    return resObject
-                }else
-                    throw('Path is not an Array')
+        objectDataMapper: function (object, path, data) {
+            var resObject = JSON.parse(JSON.stringify(object))
+            var pos = resObject;
+            path.forEach(p => pos = pos[p])
+            if (Array.isArray(pos)) {
+                pos.push(data)
+                return resObject
+            } else
+                throw ('Path is not an Array')
         },
 
-        getNextGeneralData: function(type, vectorClock, options = {}){
+        getNextGeneralData: function (type, vectorClock, options = {}) {
             var filter = this.util.getFilterString(type, options)
             var filteredResult = []
-            for(var i = 0; i<floGlobals.generalData[filter].length; i++)
-                if(floGlobals.generalData[filter][i].vectorClock > vectorClock)
+            for (var i = 0; i < floGlobals.generalData[filter].length; i++)
+                if (floGlobals.generalData[filter][i].vectorClock > vectorClock)
                     filteredResult.push(floGlobals.generalData[filter][i])
             return filteredResult
         }

From a569adcb746ef9c6b0bbeb0640ef29dcaf0f79c5 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sat, 25 Apr 2020 17:54:13 +0530
Subject: [PATCH 10/14] Adding mergeUTXOs, sendTxMulti and writeDataMulti

mergeUTXOs: /merge all UTXOs of a given floID into a single UTXO

sendTxMulti: Send Tx from (and/or) to multiple floID

writeDataMulti: Write data into blockchain from (and/or) to multiple floID
---
 standard_Operations.html | 186 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 181 insertions(+), 5 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index 4ed3dc4..d1f9ff5 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -7360,22 +7360,24 @@ Bitcoin.Util = {
         },
 
         //Write Data into blockchain
-        writeData: function (senderAddr, Data, PrivKey, receiverAddr = floGlobals.adminID) {
+        writeData: function (senderAddr, data, privKey, receiverAddr = floGlobals.adminID) {
             return new Promise((resolve, reject) => {
-                this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, PrivKey, Data)
+                if (typeof data != "string")
+                    data = JSON.stringify(data);
+                this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, privKey, data)
                     .then(txid => resolve(txid))
                     .catch(error => reject(error))
             });
         },
 
         //Send Tx to blockchain 
-        sendTx: function (senderAddr, receiverAddr, sendAmt, PrivKey, floData = '') {
+        sendTx: function (senderAddr, receiverAddr, sendAmt, privKey, floData = '') {
             return new Promise((resolve, reject) => {
                 if (!floCrypto.validateAddr(senderAddr))
                     reject(`Invalid address : ${senderAddr}`);
                 else if (!floCrypto.validateAddr(receiverAddr))
                     reject(`Invalid address : ${receiverAddr}`);
-                if (PrivKey.length < 1 || !floCrypto.verifyPrivKey(PrivKey, senderAddr))
+                if (privKey.length < 1 || !floCrypto.verifyPrivKey(privKey, senderAddr))
                     reject("Invalid Private key!");
                 else if (typeof sendAmt !== 'number' || sendAmt <= 0)
                     reject(`Invalid sendAmt : ${sendAmt}`);
@@ -7400,7 +7402,7 @@ Bitcoin.Util = {
                             if (change > 0)
                                 trx.addoutput(senderAddr, change);
                             trx.addflodata(floData);
-                            var signedTxHash = trx.sign(PrivKey, 1);
+                            var signedTxHash = trx.sign(privKey, 1);
                             this.broadcastTx(signedTxHash)
                                 .then(txid => resolve(txid))
                                 .catch(error => reject(error))
@@ -7410,11 +7412,185 @@ Bitcoin.Util = {
             });
         },
 
+        //merge all UTXOs of a given floID into a single UTXO
+        mergeUTXOs: function (floID, privKey, floData = '') {
+            return new Promise((resolve, reject) => {
+                if (!floCrypto.validateAddr(floID))
+                    return reject(`Invalid floID`);
+                if (!floCrypto.verifyPrivKey(privKey, floID))
+                    return reject("Invalid Private Key")
+
+                var trx = bitjs.transaction();
+                var utxoAmt = 0.0;
+                var fee = floGlobals.fee;
+                this.promisedAPI(`api/addr/${floID}/utxo`).then(utxos => {
+                    for (var i = utxos.length - 1; i >= 0; i--) {
+                        if (utxos[i].confirmations) {
+                            trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i]
+                                .scriptPubKey)
+                            utxoAmt += utxos[i].amount;
+                        }
+                    }
+                    trx.addoutput(floID, utxoAmt - fee);
+                    trx.addflodata(floData);
+                    var signedTxHash = trx.sign(privKey, 1);
+                    this.broadcastTx(signedTxHash)
+                        .then(txid => resolve(txid))
+                        .catch(error => reject(error))
+                }).catch(error => reject(error))
+            })
+        },
+
+        /**Write data into blockchain from (and/or) to multiple floID
+         * @param  {Object or Array} senders List of sender floIDs with respective private-key (or) Array of sender private-keys
+         * @param  {string} data FLO data of the txn
+         * @param  {Array} receivers Array of receivers
+         * @param  {float} sendAmt (optional) amount to be sent to receivers (default value: floGlobals.sendAmt)
+         * @return {Promise}
+         */
+        writeDataMulti: function (senders, data, receivers = [floGlobals.adminID], sendAmt = floGlobals.sendAmt) {
+            return new Promise((resolve, reject) => {
+                if (Array.isArray(senders)) {
+                    let tmp = {}
+                    senders.forEach(key => {
+                        if (key) {
+                            let floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(
+                                key))
+                            tmp[floID] = key;
+                        }
+                    });
+                    senders = tmp;
+                }
+                if (!Array.isArray(receivers))
+                    return reject("Invalid receivers: Receivers must be Array")
+                else {
+                    let tmp = {}
+                    receivers.forEach(floID => tmp[floID] = sendAmt)
+                    receivers = tmp;
+                }
+                if (typeof data != "string")
+                    data = JSON.stringify(data);
+                this.sendTxMulti(senders, receivers, data)
+                    .then(txid => resolve(txid))
+                    .catch(error => reject(error))
+            })
+        },
+
+        /**Send Tx from (and/or) to multiple floID
+         * @param  {Object} senders List of sender floIDs with respective private-key
+         * @param  {Object} receivers List of receivers with respective amount to be sent
+         * @param  {string} floData FLO data of the txn
+         * @return {Promise}
+         */
+        sendTxMulti: function (senders, receivers, floData = '') {
+            return new Promise((resolve, reject) => {
+                let invalids = {
+                    InvalidSenderIDs: [],
+                    InvalidPrivKeysFor: [],
+                    InvalidReceiverIDs: [],
+                    InvalidAmountFor: [],
+                    InvalidChangeAddress: []
+                }
+                for (floID in senders) {
+                    if (!floCrypto.validateAddr(floID))
+                        invalids.InvalidSenderIDs.push(floID)
+                    else if (!floCrypto.verifyPrivKey(senders[floID], floID))
+                        invalids.InvalidPrivKeysFor.push(floID)
+                }
+                for (floID in receivers) {
+                    if (!floCrypto.validateAddr(floID))
+                        invalids.InvalidReceiverIDs.push(floID)
+                    if (typeof receivers[floID] !== 'number' || receivers[floID] <= 0)
+                        invalids.InvalidAmountFor.push(floID)
+                }
+                for (i in invalids)
+                    if (!invalids[i].length)
+                        delete invalids[i];
+                if (Object.keys(invalids).length)
+                    return reject(invalids);
+                //Get balance of senders
+                let promises = []
+                for (floID in senders)
+                    promises.push(this.getBalance(floID))
+                Promise.all(promises).then(results => {
+                    console.log(results)
+                    let totalBalance = 0,
+                        fee = floGlobals.fee,
+                        balance = {};
+                    invalids.InsufficientBalance = [];
+                    for (floID in senders) {
+                        balance[floID] = parseFloat(results.shift());
+                        if (isNaN(balance[floID]) || balance[floID] <= fee)
+                            invalids.InsufficientBalance.push(floID)
+                        totalBalance += balance[floID];
+                    }
+                    if (invalids.InsufficientBalance.length)
+                        return reject(invalids)
+                    delete invalids.InsufficientBalance;
+                    console.log(balance);
+                    let totalSendAmt = fee;
+                    for (floID in receivers)
+                        totalSendAmt += receivers[floID];
+                    if (totalBalance < totalSendAmt)
+                        return reject("Insufficient total Balance")
+                    let promises = []
+                    for (floID in senders)
+                        promises.push(this.promisedAPI(`api/addr/${floID}/utxo`))
+                    Promise.all(promises).then(results => {
+                        let tmp = {};
+                        let wifSeq = [];
+                        var trx = bitjs.transaction();
+                        for (floID in senders) {
+                            let utxos = results.shift();
+                            let ratio = (balance[floID] / totalBalance).toFixed(2);
+                            let sendAmt = totalSendAmt * ratio;
+                            let wif = senders[floID]
+                            let utxoAmt = 0.0;
+                            for (let i = utxos.length - 1;
+                                (i >= 0) && (utxoAmt < sendAmt); i--) {
+                                if (utxos[i].confirmations) {
+                                    trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i]
+                                        .scriptPubKey)
+                                    wifSeq.push(wif);
+                                    utxoAmt += utxos[i].amount;
+                                }
+                            }
+                            if (utxoAmt < sendAmt)
+                                return reject("Insufficient balance:" + floID);
+                            let change = (utxoAmt - sendAmt).toFixed(5);
+                            if (change > 0)
+                                trx.addoutput(floID, change);
+
+                            tmp[floID] = {
+                                ratio: ratio,
+                                sendAmt: sendAmt,
+                                utxoAmt: utxoAmt,
+                                change: change
+                            }
+                        }
+                        for (floID in receivers)
+                            trx.addoutput(floID, receivers[floID]);
+                        trx.addflodata(floData);
+                        for (let i = 0; i < wifSeq.length; i++)
+                            trx.signinput(i, wifSeq[i], 1);
+                        var signedTxHash = trx.serialize();
+                        console.log(signedTxHash),
+                            console.log(trx)
+                        console.log(tmp)
+                        this.broadcastTx(signedTxHash)
+                            .then(txid => resolve(txid))
+                            .catch(error => reject(error))
+                    }).catch(error => reject(error))
+                }).catch(error => reject(error))
+            })
+        },
+
         //Broadcast signed Tx in blockchain using API
         broadcastTx: function (signedTxHash) {
             return new Promise((resolve, reject) => {
                 var request = new XMLHttpRequest();
                 var url = this.util.serverList[this.util.curPos] + 'api/tx/send';
+                console.log(url)
                 if (signedTxHash.length < 1)
                     reject("Empty Signature");
                 else {

From 1954fc078294b3a0aec1beedfb83db03a3341e10 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sun, 26 Apr 2020 01:04:12 +0530
Subject: [PATCH 11/14] Improved sendTxMultiple and writeDataMultiple

sendTxMultiple:
There are 2 modes (given send amount, preserve ratio)
- Given Send Amount: Uses the given send amount from each sender IDs. Pass the senderPrivKeys as object with amount to invoke this mode
eg. { privateKey1: sendAmt1, privateKey2: sendAmt2...}
- preserveRatio: The ratio of the balance of the senders are maintained. Pass the senderPrivKeys as array of private keys.
eg. [privatekey1, privatekey2....]
*Note: receivers must always be object of floIDs with receive amount.
eg. {receiverID1: receiveAmt1, receiver2: receiveAmt2...}

writeDataMultiple:
There are 2 modes (preserveRatio, equalContribution)
- preserveRatio: preserves the ratio of the balance of senders
- equalContribution: all senders contribute equal amount to the transaction
Note:
*senderPrivKey and receivers are arrays
eq. [privateKey1, privateKey2, ..] and [receiverID1, receiverID2...]
*sends default amount (floGlobals.sendAmt) to each receiver)
*last (4th) parameter is optional:
(default) true: invokes preserveRatio mode
false: invokes equalContibution mode
---
 standard_Operations.html | 193 ++++++++++++++++++++++++---------------
 1 file changed, 118 insertions(+), 75 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index d1f9ff5..def8ddd 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -3,7 +3,6 @@
 
 <head>
   <title>FLO Standard Operators</title>
-
 <script id="floGlobals">
     /* Constants for FLO blockchain operations !!Make sure to add this at begining!! */
     const floGlobals = {
@@ -7218,11 +7217,11 @@ Bitcoin.Util = {
 
         //Returns public-key from private-key
         getPubKeyHex: function (privateKeyHex) {
+            if(!privateKeyHex)
+                return null;
             var key = new Bitcoin.ECKey(privateKeyHex);
-            if (key.priv == null) {
-                console.error("Invalid Private key");
-                return;
-            }
+            if (key.priv == null) 
+                return null;
             key.setCompressed(true);
             var pubkeyHex = key.getPubKeyHex();
             return pubkeyHex;
@@ -7296,7 +7295,7 @@ Bitcoin.Util = {
                 }
                 return false;
             } catch {
-                return false
+                return false;
             }
         }
     }
@@ -7442,109 +7441,163 @@ Bitcoin.Util = {
         },
 
         /**Write data into blockchain from (and/or) to multiple floID
-         * @param  {Object or Array} senders List of sender floIDs with respective private-key (or) Array of sender private-keys
+         * @param  {Array} senderPrivKeys List of sender private-keys
          * @param  {string} data FLO data of the txn
-         * @param  {Array} receivers Array of receivers
+         * @param  {Array} receivers List of receivers
          * @param  {float} sendAmt (optional) amount to be sent to receivers (default value: floGlobals.sendAmt)
          * @return {Promise}
          */
-        writeDataMulti: function (senders, data, receivers = [floGlobals.adminID], sendAmt = floGlobals.sendAmt) {
+        writeDataMultiple: function (senderPrivKeys, data, receivers = [floGlobals.adminID], preserveRatio = true){
             return new Promise((resolve, reject) => {
-                if (Array.isArray(senders)) {
-                    let tmp = {}
-                    senders.forEach(key => {
-                        if (key) {
-                            let floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(
-                                key))
-                            tmp[floID] = key;
-                        }
-                    });
-                    senders = tmp;
+                if (!Array.isArray(senderPrivKeys)) 
+                    return reject("Invalid senderPrivKeys: SenderPrivKeys must be Array")
+                if(!preserveRatio){
+                    let tmp = {};
+                    let amount = (floGlobals.sendAmt * receivers.length) / senderPrivKeys.length;
+                    senderPrivKeys.forEach(key => tmp[key] = amount);
+                    senderPrivKeys = tmp
                 }
                 if (!Array.isArray(receivers))
                     return reject("Invalid receivers: Receivers must be Array")
                 else {
-                    let tmp = {}
-                    receivers.forEach(floID => tmp[floID] = sendAmt)
-                    receivers = tmp;
+                    let tmp = {};
+                    let amount = floGlobals.sendAmt;
+                    receivers.forEach(floID => tmp[floID] = amount);
+                    receivers = tmp
                 }
                 if (typeof data != "string")
                     data = JSON.stringify(data);
-                this.sendTxMulti(senders, receivers, data)
+                this.sendTxMultiple(senderPrivKeys, receivers, data)
                     .then(txid => resolve(txid))
                     .catch(error => reject(error))
             })
         },
 
         /**Send Tx from (and/or) to multiple floID
-         * @param  {Object} senders List of sender floIDs with respective private-key
+         * @param  {Array or Object} senderPrivKeys List of sender private-key (optional: with coins to be sent)
          * @param  {Object} receivers List of receivers with respective amount to be sent
          * @param  {string} floData FLO data of the txn
          * @return {Promise}
          */
-        sendTxMulti: function (senders, receivers, floData = '') {
+        sendTxMultiple: function (senderPrivKeys, receivers, floData = '') {
             return new Promise((resolve, reject) => {
-                let invalids = {
-                    InvalidSenderIDs: [],
-                    InvalidPrivKeysFor: [],
-                    InvalidReceiverIDs: [],
-                    InvalidAmountFor: [],
-                    InvalidChangeAddress: []
+                
+                let senders = {}, preserveRatio; 
+                //check for argument validations
+                try{
+                    let invalids = {
+                        InvalidSenderPrivKeys: [],
+                        InvalidSenderAmountFor: [],
+                        InvalidReceiverIDs: [],
+                        InvalidReceiveAmountFor: []
+                    }
+                    let inputVal = 0, outputVal = 0;
+                    //Validate sender privatekeys (and send amount if passed)
+                    //conversion when only privateKeys are passed (preserveRatio mode)
+                    if(Array.isArray(senderPrivKeys)){  
+                        senderPrivKeys.forEach(key => {
+                            try{
+                                if(!key)
+                                    invalids.InvalidSenderPrivKeys.push(key);
+                                else{
+                                    let floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(key));
+                                    senders[floID] = {
+                                        wif: key
+                                    }
+                                }
+                            }catch(error){
+                                invalids.InvalidSenderPrivKeys.push(key)
+                            }
+                        })
+                        preserveRatio = true;
+                    }
+                    //conversion when privatekeys are passed with send amount
+                    else{
+                        for(let key in senderPrivKeys){
+                            try{
+                                if(!key)
+                                    invalids.InvalidSenderPrivKeys.push(key);
+                                else{
+                                    if(typeof senderPrivKeys[key] !== 'number' || senderPrivKeys[key] <= 0)
+                                        invalids.InvalidSenderAmountFor.push(key)
+                                    else
+                                        inputVal += senderPrivKeys[key];
+                                    let floID = floCrypto.getFloIDfromPubkeyHex(floCrypto.getPubKeyHex(key));
+                                    senders[floID] = {
+                                        wif: key,
+                                        coins: senderPrivKeys[key]
+                                    }
+                                }
+                            }catch(error){
+                                invalids.InvalidSenderPrivKeys.push(key)
+                            }
+                        }
+                        preserveRatio = false;
+                    }
+                    //Validate the receiver IDs and receive amount
+                    for (let floID in receivers) {
+                        if (!floCrypto.validateAddr(floID))
+                            invalids.InvalidReceiverIDs.push(floID)
+                        if (typeof receivers[floID] !== 'number' || receivers[floID] <= 0)
+                            invalids.InvalidReceiveAmountFor.push(floID)
+                        else
+                            outputVal += receivers[floID];
+                    }
+                    //Reject if any invalids are found
+                    for (let i in invalids)
+                        if (!invalids[i].length)
+                            delete invalids[i];
+                    if (Object.keys(invalids).length)
+                        return reject(invalids);
+                    //Reject if given inputVal and outputVal are not equal
+                    if(!preserveRatio && inputVal != outputVal)
+                        return reject(`Input Amount (${inputVal}) not equal to Output Amount (${outputVal})`)
+                }catch(error){
+                    return reject(error)
                 }
-                for (floID in senders) {
-                    if (!floCrypto.validateAddr(floID))
-                        invalids.InvalidSenderIDs.push(floID)
-                    else if (!floCrypto.verifyPrivKey(senders[floID], floID))
-                        invalids.InvalidPrivKeysFor.push(floID)
-                }
-                for (floID in receivers) {
-                    if (!floCrypto.validateAddr(floID))
-                        invalids.InvalidReceiverIDs.push(floID)
-                    if (typeof receivers[floID] !== 'number' || receivers[floID] <= 0)
-                        invalids.InvalidAmountFor.push(floID)
-                }
-                for (i in invalids)
-                    if (!invalids[i].length)
-                        delete invalids[i];
-                if (Object.keys(invalids).length)
-                    return reject(invalids);
                 //Get balance of senders
                 let promises = []
-                for (floID in senders)
+                for (let floID in senders)
                     promises.push(this.getBalance(floID))
                 Promise.all(promises).then(results => {
-                    console.log(results)
                     let totalBalance = 0,
-                        fee = floGlobals.fee,
+                        totalFee = floGlobals.fee,
                         balance = {};
-                    invalids.InsufficientBalance = [];
-                    for (floID in senders) {
+                    //Divide fee among sender if not for preserveRatio
+                    if(!preserveRatio) 
+                        var dividedFee = totalFee / Object.keys(senders).length;
+                    //Check if balance of each sender is sufficient enough
+                    let insufficient = [];
+                    for (let floID in senders) {
                         balance[floID] = parseFloat(results.shift());
-                        if (isNaN(balance[floID]) || balance[floID] <= fee)
-                            invalids.InsufficientBalance.push(floID)
+                        if (isNaN(balance[floID]) || (preserveRatio && balance[floID] <= totalFee) || (!preserveRatio && balance[floID] < senders[floID].coins + dividedFee))
+                            insufficient.push(floID)
                         totalBalance += balance[floID];
                     }
-                    if (invalids.InsufficientBalance.length)
-                        return reject(invalids)
-                    delete invalids.InsufficientBalance;
-                    console.log(balance);
-                    let totalSendAmt = fee;
+                    if (insufficient.length)
+                        return reject({InsufficientBalance: insufficient})
+                    //Calculate totalSentAmount and check if totalBalance is sufficient
+                    let totalSendAmt = totalFee;
                     for (floID in receivers)
                         totalSendAmt += receivers[floID];
                     if (totalBalance < totalSendAmt)
                         return reject("Insufficient total Balance")
+                    //Get the UTXOs of the senders
                     let promises = []
                     for (floID in senders)
                         promises.push(this.promisedAPI(`api/addr/${floID}/utxo`))
                     Promise.all(promises).then(results => {
-                        let tmp = {};
                         let wifSeq = [];
                         var trx = bitjs.transaction();
                         for (floID in senders) {
                             let utxos = results.shift();
-                            let ratio = (balance[floID] / totalBalance).toFixed(2);
-                            let sendAmt = totalSendAmt * ratio;
-                            let wif = senders[floID]
+                            let sendAmt;
+                            if(preserveRatio){
+                                let ratio = (balance[floID] / totalBalance);
+                                sendAmt = totalSendAmt * ratio;
+                            } else 
+                                sendAmt = senders[floID].coins + dividedFee;
+                            let wif = senders[floID].wif;
                             let utxoAmt = 0.0;
                             for (let i = utxos.length - 1;
                                 (i >= 0) && (utxoAmt < sendAmt); i--) {
@@ -7557,16 +7610,9 @@ Bitcoin.Util = {
                             }
                             if (utxoAmt < sendAmt)
                                 return reject("Insufficient balance:" + floID);
-                            let change = (utxoAmt - sendAmt).toFixed(5);
+                            let change = (utxoAmt - sendAmt);
                             if (change > 0)
                                 trx.addoutput(floID, change);
-
-                            tmp[floID] = {
-                                ratio: ratio,
-                                sendAmt: sendAmt,
-                                utxoAmt: utxoAmt,
-                                change: change
-                            }
                         }
                         for (floID in receivers)
                             trx.addoutput(floID, receivers[floID]);
@@ -7574,9 +7620,6 @@ Bitcoin.Util = {
                         for (let i = 0; i < wifSeq.length; i++)
                             trx.signinput(i, wifSeq[i], 1);
                         var signedTxHash = trx.serialize();
-                        console.log(signedTxHash),
-                            console.log(trx)
-                        console.log(tmp)
                         this.broadcastTx(signedTxHash)
                             .then(txid => resolve(txid))
                             .catch(error => reject(error))

From 38f43d805d2c75c80daee162cc78ad4592df2c9f Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sat, 2 May 2020 18:10:47 +0530
Subject: [PATCH 12/14] InitDB: add missing objectStores

InitDB now automatically adds the missing objectstore instead of rejecting
---
 standard_Operations.html | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index def8ddd..ed23798 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8401,8 +8401,12 @@ Bitcoin.Util = {
                         .stringify(Object.keys(
                             objectStores).sort()))
                         resolve("Initiated IndexedDB");
-                    else
-                        reject("IndexedDB already exist with different ObjectStores!");
+                    else {
+                        Object.values(db.objectStoreNames).forEach(obs => delete objectStores[obs])
+                        this.initDB(dbName, objectStores, db.version + 1)
+                            .then(result => resolve(result))
+                            .catch(error => reject(error))
+                    }
                     db.close();
                 }
             });
@@ -8432,7 +8436,7 @@ Bitcoin.Util = {
                     writeReq.onsuccess = (evt) => resolve(`Write data Successful`);
                     writeReq.onerror = (evt) => reject(
                         `Write data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });
@@ -8446,7 +8450,7 @@ Bitcoin.Util = {
                     addReq.onsuccess = (evt) => resolve(`Add data successful`);
                     addReq.onerror = (evt) => reject(
                         `Add data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });
@@ -8460,7 +8464,7 @@ Bitcoin.Util = {
                     delReq.onsuccess = (evt) => resolve(`Removed Data ${key}`);
                     delReq.onerror = (evt) => reject(
                         `Remove data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });
@@ -8474,7 +8478,7 @@ Bitcoin.Util = {
                     getReq.onsuccess = (evt) => resolve(evt.target.result);
                     getReq.onerror = (evt) => reject(
                         `Read data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });
@@ -8496,7 +8500,7 @@ Bitcoin.Util = {
                     }
                     curReq.onerror = (evt) => reject(
                         `Read-All data unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });
@@ -8519,7 +8523,7 @@ Bitcoin.Util = {
                     }
                     curReq.onerror = (evt) => reject(
                         `Search unsuccessful [${evt.target.error.name}] ${evt.target.error.message}`
-                        );
+                    );
                     db.close();
                 }).catch(error => reject(error));
             });

From 0308af983f119c2dbe638c3fccf3872637dcab5f Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Sat, 2 May 2020 18:48:02 +0530
Subject: [PATCH 13/14] Adding clearData to CompactIDB

compactIDB.clearData clears all data in the given objectstore.
---
 standard_Operations.html | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/standard_Operations.html b/standard_Operations.html
index ed23798..f482803 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8470,6 +8470,18 @@ Bitcoin.Util = {
             });
         },
 
+        clearData: function (obsName, dbName = this.dbName) {
+            return new Promise((resolve, reject) => {
+                this.openDB(dbName).then(db => {
+                    var obs = db.transaction(obsName, "readwrite").objectStore(obsName);
+                    let clearReq = obs.clear();
+                    clearReq.onsuccess = (evt) => resolve(`Clear data Successful`);
+                    clearReq.onerror = (evt) => reject(`Clear data Unsuccessful`);
+                    db.close();
+                }).catch(error => reject(error));
+            });
+        },
+
         readData: function (obsName, key, dbName = this.dbName) {
             return new Promise((resolve, reject) => {
                 this.openDB(dbName).then(db => {

From d90e9f6ed4da9fcca95b7f008b3d1173e460ca5c Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Wed, 6 May 2020 00:31:44 +0530
Subject: [PATCH 14/14] Adding secure PrivateKey feature

floDapps.securePrivKey(pwd): replaces the stored private key with encrypted variant.
Changed made in startup function getCredentials to support securePrivateKey.

Improved and promisified clearCredentials.
---
 standard_Operations.html | 97 ++++++++++++++++++++++++++++------------
 1 file changed, 69 insertions(+), 28 deletions(-)

diff --git a/standard_Operations.html b/standard_Operations.html
index f482803..3754c60 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -8781,16 +8781,6 @@ Bitcoin.Util = {
                 })
             },
 
-            privKeyInput: function () {
-                return new Promise((resolve, reject) => {
-                    var privKey = prompt("Enter Private Key: ")
-                    if (privKey === null)
-                        reject(null)
-                    else
-                        resolve(privKey)
-                })
-            },
-
             startUpFunctions: {
 
                 readSupernodeListFromAPI: function () {
@@ -8876,7 +8866,19 @@ Bitcoin.Util = {
 
                 getCredentials: function () {
 
-                    var readSharesFromIDB = function (indexArr) {
+                    const defaultInput = function (type) {
+                        return new Promise((resolve, reject) => {
+                            let inputVal = prompt(`Enter ${type}: `)
+                            if (inputVal === null)
+                                reject(null)
+                            else
+                                resolve(inputVal)
+                        })
+                    }
+
+                    const inputFn = this.getCredentials.privKeyInput || defaultInput;
+
+                    const readSharesFromIDB = function (indexArr) {
                         return new Promise((resolve, reject) => {
                             var promises = []
                             for (var i = 0; i < indexArr.length; i++)
@@ -8891,7 +8893,7 @@ Bitcoin.Util = {
                         })
                     }
 
-                    var writeSharesToIDB = function (shares, i = 0, resultIndexes = []) {
+                    const writeSharesToIDB = function (shares, i = 0, resultIndexes = []) {
                         return new Promise((resolve, reject) => {
                             if (i >= shares.length)
                                 return resolve(resultIndexes)
@@ -8907,7 +8909,7 @@ Bitcoin.Util = {
                         })
                     }
 
-                    var getPrivateKeyCredentials = function () {
+                    const getPrivateKeyCredentials = function () {
                         return new Promise((resolve, reject) => {
                             var indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
                             if (indexArr) {
@@ -8916,7 +8918,7 @@ Bitcoin.Util = {
                                     .catch(error => reject(error))
                             } else {
                                 var privKey;
-                                floDapps.util.privKeyInput().then(result => {
+                                inputFn("PRIVATE_KEY").then(result => {
                                     try {
                                         if (!result)
                                             return reject("Empty Private Key")
@@ -8956,16 +8958,38 @@ Bitcoin.Util = {
                         })
                     }
 
+                    const checkIfPinRequired = function(key){
+                        return new Promise((resolve, reject) => {
+                            if(key.length == 52)
+                                resolve(key)
+                            else {
+                                inputFn("PIN/Password").then(pwd => {
+                                    try{
+                                        let privKey = Crypto.AES.decrypt(key, pwd);
+                                        resolve(privKey)
+                                    }catch(error){
+                                        reject("Access Denied: Incorrect PIN/Password")
+                                    }                                   
+                                }).catch(error => reject("Access Denied: PIN/Password required"))
+                            } 
+                        })
+                    }
+
                     return new Promise((resolve, reject) => {
-                        getPrivateKeyCredentials().then(privKey => {
-                            myPrivKey = privKey
-                            myPubKey = floCrypto.getPubKeyHex(myPrivKey)
-                            myFloID = floCrypto.getFloIDfromPubkeyHex(myPubKey)
-                            resolve('Login Credentials loaded successful')
+                        getPrivateKeyCredentials().then(key => {
+                            checkIfPinRequired(key).then(privKey => {
+                                try{
+                                    myPrivKey = privKey
+                                    myPubKey = floCrypto.getPubKeyHex(myPrivKey)
+                                    myFloID = floCrypto.getFloIDfromPubkeyHex(myPubKey)
+                                    resolve('Login Credentials loaded successful')
+                                }catch(error){
+                                    reject("Corrupted Private Key")
+                                }
+                            }).catch(error => reject(error))
                         }).catch(error => reject(error))
                     })
                 }
-
             },
 
             callStartUpFunction: function (fname) {
@@ -9021,7 +9045,7 @@ Bitcoin.Util = {
         },
 
         setCustomPrivKeyInput: function (customFn) {
-            this.util.privKeyInput = customFn
+            this.util.startUpFunctions.getCredentials.privKeyInput = customFn
         },
 
         setAppObjectStores: function (appObs) {
@@ -9049,13 +9073,30 @@ Bitcoin.Util = {
         },
 
         clearCredentials: function () {
-            var indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
-            if (!indexArr)
-                return `privKey credentials not found!`
-            indexArr = JSON.parse(indexArr)
-            indexArr.forEach(i => compactIDB.removeData('credentials', i))
-            localStorage.removeItem(`${floGlobals.application}#privKey`)
-            return `privKey credentials deleted!`
+            return new Promise((resolve, reject) => {
+                compactIDB.clearData('credentials').then(result => {
+                    localStorage.removeItem(`${floGlobals.application}#privKey`)
+                    resolve("privKey credentials deleted!")
+                }).catch(error => reject(error))
+            })
+        },
+
+        securePrivKey: function(pwd){
+            return new Promise((resolve, reject) => {
+                let indexArr = localStorage.getItem(`${floGlobals.application}#privKey`)
+                if(!indexArr)
+                    return reject("PrivKey not found");
+                indexArr = JSON.parse(indexArr)
+                let encryptedKey = Crypto.AES.encrypt(myPrivKey, pwd);
+                let threshold = indexArr.length;
+                let shares = floCrypto.createShamirsSecretShares(encryptedKey, threshold, threshold)
+                let promises = []; 
+                for(var i=0; i<threshold;i++)
+                    promises.push(compactIDB.writeData("credentials", shares[i], indexArr[i], floGlobals.application));
+                Promise.all(promises)
+                    .then(results => resolve("Private Key Secured"))
+                    .catch(error => reject(error))
+            })
         },
 
         objectDataMapper: function (object, path, data) {