diff --git a/standard_Operations.html b/standard_Operations.html
index fcd8702..c09c433 100644
--- a/standard_Operations.html
+++ b/standard_Operations.html
@@ -6637,8 +6637,8 @@
 </script>
 
 <script id="floCrypto" version="2.2.0">
+    /* FLO Crypto Operators*/
     'use strict';
-
     (function(GLOBAL) {
         const floCrypto = GLOBAL.floCrypto = {
 
@@ -6977,442 +6977,441 @@
 
     })(typeof global !== "undefined" ? global : window);
 </script>
-<script id="floBlockchainAPI" version="2.1.1a">
+<script id="floBlockchainAPI" version="2.2.0">
     /* FLO Blockchain Operator to send/receive data from blockchain using API calls*/
-    const floBlockchainAPI = {
+    'use strict';
+    (function(GLOBAL) {
+        const floBlockchainAPI = GLOBAL.floBlockchainAPI = {
 
-        util: {
-            serverList: floGlobals.apiURL[floGlobals.blockchain].slice(0),
-            curPos: floCrypto.randInt(0, floGlobals.apiURL[floGlobals.blockchain].length - 1),
-            fetch_retry: function(apicall, rm_flosight) {
-                return new Promise((resolve, reject) => {
-                    let i = this.serverList.indexOf(rm_flosight)
-                    if (i != -1) this.serverList.splice(i, 1);
-                    this.curPos = floCrypto.randInt(0, this.serverList.length - 1);
-                    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 {
-                        let flosight = this.serverList[this.curPos];
-                        fetch(flosight + 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 - 1),
+                fetch_retry: function(apicall, rm_flosight) {
+                    return new Promise((resolve, reject) => {
+                        let i = this.serverList.indexOf(rm_flosight)
+                        if (i != -1) this.serverList.splice(i, 1);
+                        this.curPos = floCrypto.randInt(0, this.serverList.length - 1);
+                        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 {
+                            let flosight = this.serverList[this.curPos];
+                            fetch(flosight + apicall).then(response => {
+                                if (response.ok)
+                                    response.json().then(data => resolve(data));
+                                else {
+                                    this.fetch_retry(apicall, flosight)
+                                        .then(result => resolve(result))
+                                        .catch(error => reject(error));
+                                }
+                            }).catch(error => {
                                 this.fetch_retry(apicall, flosight)
                                     .then(result => resolve(result))
                                     .catch(error => reject(error));
-                            }
-                        }).catch(error => {
-                            this.fetch_retry(apicall, flosight)
-                                .then(result => resolve(result))
-                                .catch(error => reject(error));
-                        })
-                    }
-                })
+                            })
+                        }
+                    })
+                },
+
+                current: function() {
+                    return this.serverList[this.curPos];
+                }
             },
 
-            current: function() {
-                return this.serverList[this.curPos];
-            }
-        },
+            //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));
+                });
+            },
 
-        //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));
+                });
+            },
 
-        //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, strict_utxo = true) {
+                return new Promise((resolve, reject) => {
+                    if (typeof data != "string")
+                        data = JSON.stringify(data);
+                    this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, privKey, data, strict_utxo)
+                        .then(txid => resolve(txid))
+                        .catch(error => reject(error));
+                });
+            },
 
-        //Write Data into blockchain
-        writeData: function(senderAddr, data, privKey, receiverAddr = floGlobals.adminID, strict_utxo = true) {
-            return new Promise((resolve, reject) => {
-                if (typeof data != "string")
-                    data = JSON.stringify(data);
-                this.sendTx(senderAddr, receiverAddr, floGlobals.sendAmt, privKey, data, strict_utxo)
-                    .then(txid => resolve(txid))
-                    .catch(error => reject(error));
-            });
-        },
+            //Send Tx to blockchain 
+            sendTx: function(senderAddr, receiverAddr, sendAmt, privKey, floData = '', strict_utxo = true) {
+                return new Promise((resolve, reject) => {
+                    if (!floCrypto.validateASCII(floData))
+                        return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
+                    else if (!floCrypto.validateAddr(senderAddr))
+                        return reject(`Invalid address : ${senderAddr}`);
+                    else if (!floCrypto.validateAddr(receiverAddr))
+                        return reject(`Invalid address : ${receiverAddr}`);
+                    else if (privKey.length < 1 || !floCrypto.verifyPrivKey(privKey, senderAddr))
+                        return reject("Invalid Private key!");
+                    else if (typeof sendAmt !== 'number' || sendAmt <= 0)
+                        return reject(`Invalid sendAmt : ${sendAmt}`);
 
-        //Send Tx to blockchain 
-        sendTx: function(senderAddr, receiverAddr, sendAmt, privKey, floData = '', strict_utxo = true) {
-            return new Promise((resolve, reject) => {
-                if (!floCrypto.validateASCII(floData))
-                    return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
-                else if (!floCrypto.validateAddr(senderAddr))
-                    return reject(`Invalid address : ${senderAddr}`);
-                else if (!floCrypto.validateAddr(receiverAddr))
-                    return reject(`Invalid address : ${receiverAddr}`);
-                else if (privKey.length < 1 || !floCrypto.verifyPrivKey(privKey, senderAddr))
-                    return reject("Invalid Private key!");
-                else if (typeof sendAmt !== 'number' || sendAmt <= 0)
-                    return reject(`Invalid sendAmt : ${sendAmt}`);
-
-                //get unconfirmed tx list
-                this.promisedAPI(`api/addr/${senderAddr}`).then(result => {
-                    this.readTxs(senderAddr, 0, result.unconfirmedTxApperances).then(result => {
-                        let unconfirmedSpent = {};
-                        for (let tx of result.items)
-                            if (tx.confirmations == 0)
-                                for (let vin of tx.vin)
-                                    if (vin.addr === senderAddr) {
-                                        if (Array.isArray(unconfirmedSpent[vin.txid]))
-                                            unconfirmedSpent[vin.txid].push(vin.vout);
-                                        else
-                                            unconfirmedSpent[vin.txid] = [vin.vout];
-                                    }
-                        //get utxos list
-                        this.promisedAPI(`api/addr/${senderAddr}/utxo`).then(utxos => {
-                            //form/construct the transaction data
-                            var trx = bitjs.transaction();
-                            var utxoAmt = 0.0;
-                            var fee = floGlobals.fee;
-                            for (var i = utxos.length - 1;
-                                (i >= 0) && (utxoAmt < sendAmt + fee); i--) {
-                                //use only utxos with confirmations (strict_utxo mode)
-                                if (utxos[i].confirmations || !strict_utxo) {
-                                    if (utxos[i].txid in unconfirmedSpent && unconfirmedSpent[utxos[i].txid].includes(utxos[i].vout))
-                                        continue; //A transaction has already used this utxo, but is unconfirmed.
-                                    trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey);
-                                    utxoAmt += utxos[i].amount;
-                                };
-                            }
-                            if (utxoAmt < sendAmt + fee)
-                                reject("Insufficient FLO balance!");
-                            else {
-                                trx.addoutput(receiverAddr, sendAmt);
-                                var change = utxoAmt - sendAmt - fee;
-                                if (change > 0)
-                                    trx.addoutput(senderAddr, change);
-                                trx.addflodata(floData.replace(/\n/g, ' '));
-                                var signedTxHash = trx.sign(privKey, 1);
-                                this.broadcastTx(signedTxHash)
-                                    .then(txid => resolve(txid))
-                                    .catch(error => reject(error))
-                            }
+                    //get unconfirmed tx list
+                    this.promisedAPI(`api/addr/${senderAddr}`).then(result => {
+                        this.readTxs(senderAddr, 0, result.unconfirmedTxApperances).then(result => {
+                            let unconfirmedSpent = {};
+                            for (let tx of result.items)
+                                if (tx.confirmations == 0)
+                                    for (let vin of tx.vin)
+                                        if (vin.addr === senderAddr) {
+                                            if (Array.isArray(unconfirmedSpent[vin.txid]))
+                                                unconfirmedSpent[vin.txid].push(vin.vout);
+                                            else
+                                                unconfirmedSpent[vin.txid] = [vin.vout];
+                                        }
+                            //get utxos list
+                            this.promisedAPI(`api/addr/${senderAddr}/utxo`).then(utxos => {
+                                //form/construct the transaction data
+                                var trx = bitjs.transaction();
+                                var utxoAmt = 0.0;
+                                var fee = floGlobals.fee;
+                                for (var i = utxos.length - 1;
+                                    (i >= 0) && (utxoAmt < sendAmt + fee); i--) {
+                                    //use only utxos with confirmations (strict_utxo mode)
+                                    if (utxos[i].confirmations || !strict_utxo) {
+                                        if (utxos[i].txid in unconfirmedSpent && unconfirmedSpent[utxos[i].txid].includes(utxos[i].vout))
+                                            continue; //A transaction has already used this utxo, but is unconfirmed.
+                                        trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey);
+                                        utxoAmt += utxos[i].amount;
+                                    };
+                                }
+                                if (utxoAmt < sendAmt + fee)
+                                    reject("Insufficient FLO balance!");
+                                else {
+                                    trx.addoutput(receiverAddr, sendAmt);
+                                    var change = utxoAmt - sendAmt - fee;
+                                    if (change > 0)
+                                        trx.addoutput(senderAddr, change);
+                                    trx.addflodata(floData.replace(/\n/g, ' '));
+                                    var signedTxHash = trx.sign(privKey, 1);
+                                    this.broadcastTx(signedTxHash)
+                                        .then(txid => resolve(txid))
+                                        .catch(error => reject(error))
+                                }
+                            }).catch(error => reject(error))
                         }).catch(error => reject(error))
                     }).catch(error => reject(error))
-                }).catch(error => reject(error))
-            });
-        },
+                });
+            },
 
-        //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");
-                if (!floCrypto.validateASCII(floData))
-                    return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
-                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.replace(/\n/g, ' '));
-                    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  {Array} senderPrivKeys List of sender private-keys
-         * @param  {string} data FLO data of the txn
-         * @param  {Array} receivers List of receivers
-         * @param  {boolean} preserveRatio (optional) preserve ratio or equal contribution
-         * @return {Promise}
-         */
-        writeDataMultiple: function(senderPrivKeys, data, receivers = [floGlobals.adminID], preserveRatio = true) {
-            return new Promise((resolve, reject) => {
-                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 = {};
-                    let amount = floGlobals.sendAmt;
-                    receivers.forEach(floID => tmp[floID] = amount);
-                    receivers = tmp
-                }
-                if (typeof data != "string")
-                    data = JSON.stringify(data);
-                this.sendTxMultiple(senderPrivKeys, receivers, data)
-                    .then(txid => resolve(txid))
-                    .catch(error => reject(error))
-            })
-        },
-
-        /**Send Tx from (and/or) to multiple floID
-         * @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}
-         */
-        sendTxMultiple: function(senderPrivKeys, receivers, floData = '') {
-            return new Promise((resolve, reject) => {
-                if (!floCrypto.validateASCII(floData))
-                    return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
-                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.getFloID(key);
-                                    senders[floID] = {
-                                        wif: key
-                                    }
-                                }
-                            } catch (error) {
-                                invalids.InvalidSenderPrivKeys.push(key)
+            //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");
+                    if (!floCrypto.validateASCII(floData))
+                        return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
+                    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;
                             }
-                        })
-                        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.getFloID(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)
-                }
-                //Get balance of senders
-                let promises = [];
-                for (let floID in senders)
-                    promises.push(this.getBalance(floID));
-                Promise.all(promises).then(results => {
-                    let totalBalance = 0,
-                        totalFee = floGlobals.fee,
-                        balance = {};
-                    //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]) || (preserveRatio && balance[floID] <= totalFee) ||
-                            (!preserveRatio && balance[floID] < senders[floID].coins + dividedFee))
-                            insufficient.push(floID);
-                        totalBalance += balance[floID];
-                    }
-                    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 wifSeq = [];
-                        var trx = bitjs.transaction();
-                        for (floID in senders) {
-                            let utxos = results.shift();
-                            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--) {
-                                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);
-                            if (change > 0)
-                                trx.addoutput(floID, change);
-                        }
-                        for (floID in receivers)
-                            trx.addoutput(floID, receivers[floID]);
+                        trx.addoutput(floID, utxoAmt - fee);
                         trx.addflodata(floData.replace(/\n/g, ' '));
-                        for (let i = 0; i < wifSeq.length; i++)
-                            trx.signinput(i, wifSeq[i], 1);
-                        var signedTxHash = trx.serialize();
+                        var signedTxHash = trx.sign(privKey, 1);
                         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 {
-                    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);
+            /**Write data into blockchain from (and/or) to multiple floID
+             * @param  {Array} senderPrivKeys List of sender private-keys
+             * @param  {string} data FLO data of the txn
+             * @param  {Array} receivers List of receivers
+             * @param  {boolean} preserveRatio (optional) preserve ratio or equal contribution
+             * @return {Promise}
+             */
+            writeDataMultiple: function(senderPrivKeys, data, receivers = [floGlobals.adminID], preserveRatio = true) {
+                return new Promise((resolve, reject) => {
+                    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;
                     }
-                    request.send(params);
-                }
-            })
-        },
+                    if (!Array.isArray(receivers))
+                        return reject("Invalid receivers: Receivers must be Array");
+                    else {
+                        let tmp = {};
+                        let amount = floGlobals.sendAmt;
+                        receivers.forEach(floID => tmp[floID] = amount);
+                        receivers = tmp
+                    }
+                    if (typeof data != "string")
+                        data = JSON.stringify(data);
+                    this.sendTxMultiple(senderPrivKeys, receivers, data)
+                        .then(txid => resolve(txid))
+                        .catch(error => reject(error))
+                })
+            },
 
-        getTx: function(txid) {
-            return new Promise((resolve, reject) => {
-                this.promisedAPI(`api/tx/${txid}`)
-                    .then(response => resolve(response))
-                    .catch(error => reject(error))
-            })
-        },
+            /**Send Tx from (and/or) to multiple floID
+             * @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}
+             */
+            sendTxMultiple: function(senderPrivKeys, receivers, floData = '') {
+                return new Promise((resolve, reject) => {
+                    if (!floCrypto.validateASCII(floData))
+                        return reject("Invalid FLO_Data: only printable ASCII characters are allowed");
+                    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.getFloID(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.getFloID(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)
+                    }
+                    //Get balance of senders
+                    let promises = [];
+                    for (let floID in senders)
+                        promises.push(this.getBalance(floID));
+                    Promise.all(promises).then(results => {
+                        let totalBalance = 0,
+                            totalFee = floGlobals.fee,
+                            balance = {};
+                        //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]) || (preserveRatio && balance[floID] <= totalFee) ||
+                                (!preserveRatio && balance[floID] < senders[floID].coins + dividedFee))
+                                insufficient.push(floID);
+                            totalBalance += balance[floID];
+                        }
+                        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 wifSeq = [];
+                            var trx = bitjs.transaction();
+                            for (floID in senders) {
+                                let utxos = results.shift();
+                                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--) {
+                                    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);
+                                if (change > 0)
+                                    trx.addoutput(floID, change);
+                            }
+                            for (floID in receivers)
+                                trx.addoutput(floID, receivers[floID]);
+                            trx.addflodata(floData.replace(/\n/g, ' '));
+                            for (let i = 0; i < wifSeq.length; i++)
+                                trx.signinput(i, wifSeq[i], 1);
+                            var signedTxHash = trx.serialize();
+                            this.broadcastTx(signedTxHash)
+                                .then(txid => resolve(txid))
+                                .catch(error => reject(error))
+                        }).catch(error => reject(error))
+                    }).catch(error => reject(error))
+                })
+            },
 
-        //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=${to}`)
-                    .then(response => resolve(response))
-                    .catch(error => reject(error))
-            });
-        },
+            //Broadcast signed Tx in blockchain using API
+            broadcastTx: function(signedTxHash) {
+                return new Promise((resolve, reject) => {
+                    if (signedTxHash.length < 1)
+                        return reject("Empty Signature");
+                    var url = this.util.serverList[this.util.curPos] + 'api/tx/send';
+                    fetch(url, {
+                        method: "POST",
+                        headers: {
+                            'Content-Type': 'application/json'
+                        },
+                        body: `{"rawtx":"${signedTxHash}"}`
+                    }).then(response => {
+                        if (response.ok)
+                            response.json().then(data => resolve(data.txid.result));
+                        else
+                            response.text().then(data => resolve(data));
+                    }).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=${response.totalItems}0`)
-                        .then(response => resolve(response.items))
-                        .catch(error => reject(error));
-                }).catch(error => reject(error))
-            });
-        },
+            getTx: function(txid) {
+                return new Promise((resolve, reject) => {
+                    this.promisedAPI(`api/tx/${txid}`)
+                        .then(response => resolve(response))
+                        .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
-        receivedOnly: filters only received data
-        pattern     : filters data that with JSON pattern
-        filter      : custom filter funtion for floData (eg . filter: d => {return d[0] == '$'})
-        tx          : (boolean) resolve tx data or not (resolves an Array of Object with tx details)
-        sender      : flo-id(s) of sender
-        receiver    : flo-id(s) of receiver
-        */
-        readData: function(addr, options = {}) {
-            options.limit = options.limit || 0;
-            options.ignoreOld = options.ignoreOld || 0;
-            if (typeof options.sender === "string") options.sender = [options.sender];
-            if (typeof options.receiver === "string") options.receiver = [options.receiver];
-            return new Promise((resolve, reject) => {
-                this.promisedAPI(`api/addrs/${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 => {
+            //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
+            receivedOnly: filters only received data
+            pattern     : filters data that with JSON pattern
+            filter      : custom filter funtion for floData (eg . filter: d => {return d[0] == '$'})
+            tx          : (boolean) resolve tx data or not (resolves an Array of Object with tx details)
+            sender      : flo-id(s) of sender
+            receiver    : flo-id(s) of receiver
+            */
+            readData: function(addr, options = {}) {
+                options.limit = options.limit || 0;
+                options.ignoreOld = options.ignoreOld || 0;
+                if (typeof options.sender === "string") options.sender = [options.sender];
+                if (typeof options.receiver === "string") options.receiver = [options.receiver];
+                return new Promise((resolve, reject) => {
+                    this.promisedAPI(`api/addrs/${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 (let i = 0; i < (response.totalItems - options.ignoreOld) && filteredData.length < options.limit; i++) {
+                            for (let i = 0; i < (response.totalItems - options.ignoreOld) &&
+                                filteredData.length < options.limit; i++) {
                                 if (options.pattern) {
                                     try {
                                         let jsonContent = JSON.parse(response.items[i].floData);
@@ -7476,14 +7475,15 @@
                                 data: filteredData
                             });
                         }).catch(error => {
+                            reject(error);
+                        });
+                    }).catch(error => {
                         reject(error);
                     });
-                }).catch(error => {
-                    reject(error);
                 });
-            });
+            }
         }
-    }
+    })(typeof global !== "undefined" ? global : window);
 </script>
 <script id="compactIDB" version="2.0.1">
     /* Compact IndexedDB operations */