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floBlockchainAPI v2.1.1

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- improved sendTx to check if the utxo is already used but unconfirmed (ie, still in mempool) and ignore those utxos.
This allows users to send multiple tx from the same floID without the need to wait for confirmation of prev tx as long as enough utxos are available.

- Optional parameter: strict_utxo (boolean): Default=true (safe mode).
If false, allows unconfirmed UTXOs to be included in the txn.
This will allow users to chain send tx as long as enough balance FLO is available.
WARNING: if one tx in the chain is dropped, all next tx dependent on that tx will be dropped too.

- writeData (as it invokes sendTx) also have the above improvements
This commit is contained in:
sairajzero 2021-09-17 02:25:16 +05:30
parent f8954a2532
commit 5c21a01b68
1 changed files with 57 additions and 41 deletions
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98
standard_Operations.html
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@ -7290,7 +7290,7 @@ Bitcoin.Util = {
}
}
</script>
<script id="floBlockchainAPI" version="2.1.0">
<script id="floBlockchainAPI" version="2.1.1">
/* FLO Blockchain Operator to send/receive data from blockchain using API calls*/
const floBlockchainAPI = {
@ -7355,57 +7355,75 @@ Bitcoin.Util = {
},
//Write Data into blockchain
writeData: function(senderAddr, data, privKey, receiverAddr = floGlobals.adminID) {
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)
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 = '') {
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");
if (!floCrypto.validateAddr(senderAddr))
reject(`Invalid address : ${senderAddr}`);
else if (!floCrypto.validateAddr(senderAddr))
return 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!");
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)
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 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))
}
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/${senderAddr}/utxo`).then(utxos => {
//form/construct the transaction data
var trx = bitjs.transaction();
var utxoAmt = 0.0;
var fee = floGlobals.fee;
for (var i = utxos.length - 1;
(i >= 0) && (utxoAmt < sendAmt + fee); i--) {
//use only utxos with confirmations (strict_utxo mode)
if (utxos[i].confirmations || !strict_utxo) {
if (utxos[i].txid in unconfirmedSpent && unconfirmedSpent[utxos[i].txid].includes(utxos[i].vout))
continue; //A transaction has already used this utxo, but is unconfirmed.
trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey);
utxoAmt += utxos[i].amount;
};
}
if (utxoAmt < sendAmt + fee)
reject("Insufficient FLO balance!");
else {
trx.addoutput(receiverAddr, sendAmt);
var change = utxoAmt - sendAmt - fee;
if (change > 0)
trx.addoutput(senderAddr, change);
trx.addflodata(floData.replace(/\n/g, ' '));
var signedTxHash = trx.sign(privKey, 1);
this.broadcastTx(signedTxHash)
.then(txid => resolve(txid))
.catch(error => reject(error))
}
}).catch(error => reject(error))
}).catch(error => reject(error))
}
}).catch(error => reject(error))
});
},
@ -7425,8 +7443,7 @@ Bitcoin.Util = {
this.promisedAPI(`api/addr/${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)
trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey)
utxoAmt += utxos[i].amount;
}
}
@ -7611,8 +7628,7 @@ Bitcoin.Util = {
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)
trx.addinput(utxos[i].txid, utxos[i].vout, utxos[i].scriptPubKey)
wifSeq.push(wif);
utxoAmt += utxos[i].amount;
}