btcOperator v1.0.7
- Added createTx: Create an unsigned tx (no privkey required) [segwit sender not supported for now as redeem-script needed] - Added createMultiSigTx: Create an unsigned tx for multisig address - Optimised sendTx to reuse code (no functional change)
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sairajzero
parent
9dd132b145
commit
4244774635
206
btcOperator.js
206
btcOperator.js
@ -1,4 +1,4 @@
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(function(EXPORTS) { //btcOperator v1.0.6
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(function(EXPORTS) { //btcOperator v1.0.7
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/* BTC Crypto and API Operator */
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const btcOperator = EXPORTS;
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@ -187,7 +187,7 @@
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case "standard":
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return false;
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case "multisig":
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return coinjs.segwitAddress(btcOperator.pubkey(key)).redeemscript;
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return key ? coinjs.segwitAddress(btcOperator.pubkey(key)).redeemscript : null;
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case "bech32":
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return decode.redeemscript;
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default:
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@ -195,6 +195,53 @@
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}
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}
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function validateTxParameters(parameters) {
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let invalids = [];
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//sender-ids
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if (parameters.senders) {
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if (!Array.isArray(parameters.senders))
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parameters.senders = [parameters.senders];
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parameters.senders.forEach(id => !validateAddress(id) ? invalids.push(id) : null);
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if (invalids.length)
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throw "Invalid senders:" + invalids;
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}
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if (parameters.privkeys) {
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if (!Array.isArray(parameters.privkeys))
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parameters.privkeys = [parameters.privkeys];
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if (parameters.senders.length != parameters.privkeys.length)
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throw "Array length for senders and privkeys should be equal";
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parameters.senders.forEach((id, i) => {
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let key = parameters.privkeys[i];
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if (!verifyKey(id, key)) //verify private-key
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invalids.push(id);
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if (key.length === 64) //convert Hex to WIF if needed
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parameters.privkeys[i] = coinjs.privkey2wif(key);
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});
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if (invalids.length)
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throw "Invalid keys:" + invalids;
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}
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//receiver-ids (and change-id)
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if (!Array.isArray(parameters.receivers))
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parameters.receivers = [parameters.receivers];
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parameters.receivers.forEach(id => !validateAddress(id) ? invalids.push(id) : null);
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if (invalids.length)
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throw "Invalid receivers:" + invalids;
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if (parameters.change_addr && !validateAddress(parameters.change_addr))
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throw "Invalid change_address:" + parameters.change_addr;
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//fee and amounts
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if (typeof parameters.fee !== "number" || parameters.fee <= 0)
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throw "Invalid fee:" + parameters.fee;
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if (!Array.isArray(parameters.amounts))
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parameters.amounts = [parameters.amounts];
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if (parameters.receivers.length != parameters.amounts.length)
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throw "Array length for receivers and amounts should be equal";
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parameters.amounts.forEach(a => typeof a !== "number" || a <= 0 ? invalids.push(a) : null);
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if (invalids.length)
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throw "Invalid amounts:" + invalids;
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//return
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return parameters;
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}
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function addUTXOs(tx, senders, redeemScripts, required_amount, n = 0) {
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return new Promise((resolve, reject) => {
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required_amount = parseFloat(required_amount.toFixed(8));
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@ -227,70 +274,48 @@
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})
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}
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function addOutputs(tx, receivers, amounts, change, change_addr) {
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for (let i in receivers)
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tx.addoutput(receivers[i], amounts[i]);
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if (parseFloat(change.toFixed(8)) > 0)
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tx.addoutput(change_addr || senders[0], change);
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}
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btcOperator.sendTx = function(senders, privkeys, receivers, amounts, fee, change_addr = null) {
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return new Promise((resolve, reject) => {
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//Add values into array (if single values are passed)
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if (!Array.isArray(senders))
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senders = [senders];
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if (!Array.isArray(privkeys))
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privkeys = [privkeys];
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if (!Array.isArray(receivers))
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receivers = [receivers];
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if (!Array.isArray(amounts))
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amounts = [amounts];
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let invalids = [];
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//validate tx-input parameters
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if (senders.length != privkeys.length)
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return reject("Array length for senders and privkeys should be equal");
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const redeemScripts = [],
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try {
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({
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senders,
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receivers,
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amounts
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} = validateTxParameters({
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senders,
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privkeys,
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receivers,
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amounts,
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fee,
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change_addr
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}));
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} catch (e) {
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return reject(e)
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}
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let total_amount = parseFloat(amounts.reduce((t, a) => t + a, 0).toFixed(8)),
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redeemScripts = [],
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wif_keys = [];
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for (let i in senders) {
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if (!verifyKey(senders[i], privkeys[i])) //verify private-key
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invalids.push(senders[i]);
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if (privkeys[i].length === 64) //convert Hex to WIF if needed
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privkeys[i] = coinjs.privkey2wif(privkeys[i]);
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let rs = _redeemScript(senders[i], privkeys[i]); //get redeem-script (segwit/bech32)
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redeemScripts.push(rs);
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rs === false ? wif_keys.unshift(privkeys[i]) : wif_keys.push(privkeys[i]); //sorting private-keys (wif)
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}
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if (invalids.length)
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return reject("Invalid keys:" + invalids);
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if (typeof fee !== "number" || fee <= 0)
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return reject("Invalid fee:" + fee);
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//validate tx-output parameters
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if (receivers.length != amounts.length)
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return reject("Array length for receivers and amounts should be equal");
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let total_amount = 0;
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for (let i in receivers)
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if (!validateAddress(receivers[i]))
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invalids.push(receivers[i]);
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if (invalids.length)
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return reject("Invalid receivers:" + invalids);
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for (let i in amounts) {
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if (typeof amounts[i] !== "number" || amounts[i] <= 0)
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invalids.push(amounts[i]);
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else
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total_amount += amounts[i];
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}
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if (invalids.length)
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return reject("Invalid amounts:" + invalids);
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if (change_addr && !validateAddress(change_addr))
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return reject("Invalid change_address:" + change_addr);
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if (redeemScripts.includes(null)) //TODO: segwit
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return reject("Unable to get redeem-script");
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//create transaction
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var tx = coinjs.transaction();
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total_amount = parseFloat(total_amount.toFixed(8));
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const tx = coinjs.transaction();
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addUTXOs(tx, senders, redeemScripts, total_amount + fee).then(result => {
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if (result > 0)
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return reject("Insufficient Balance");
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for (let i in receivers)
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tx.addoutput(receivers[i], amounts[i]);
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let change = parseFloat(Math.abs(result).toFixed(8));
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if (change > 0)
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tx.addoutput(change_addr || senders[0], change);
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console.debug("amounts (total, fee, change):", total_amount, fee, change);
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addOutputs(tx, receivers, amounts, Math.abs(result), change_addr || senders[0])
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console.debug("Unsigned:", tx.serialize());
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new Set(wif_keys).forEach(key => console.debug("Signing key:", key, tx.sign(key, 1 /*sighashtype*/ ))); //Sign the tx using private key WIF
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@ -299,9 +324,80 @@
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broadcast(tx.serialize())
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.then(result => resolve(result))
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.catch(error => reject(error));
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}).catch(error => reject(error))
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});
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})
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};
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}
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btcOperator.createTx = function(senders, receivers, amounts, fee, change_addr = null) {
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return new Promise((resolve, reject) => {
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try {
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({
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senders,
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receivers,
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amounts
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} = validateTxParameters({
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senders,
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receivers,
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amounts,
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fee,
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change_addr
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}));
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} catch (e) {
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return reject(e)
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}
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let total_amount = parseFloat(amounts.reduce((t, a) => t + a, 0).toFixed(8)),
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redeemScripts = senders.map(id => _redeemScript(id));
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if (redeemScripts.includes(null)) //TODO: segwit
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return reject("Unable to get redeem-script");
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//create transaction
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const tx = coinjs.transaction();
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addUTXOs(tx, senders, redeemScripts, total_amount + fee).then(result => {
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if (result > 0)
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return reject("Insufficient Balance");
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addOutputs(tx, receivers, amounts, Math.abs(result), change_addr || senders[0])
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resolve(tx.serialize());
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})
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})
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}
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btcOperator.createMultiSigTx = function(sender, redeemScript, receivers, amounts, fee) {
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return new Promise((resolve, reject) => {
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//validate tx parameters
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if (validateAddress(sender) !== "multisig")
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return reject("Invalid sender (multisig):" + sender);
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else {
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let script = coinjs.script();
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let decode = script.decodeRedeemScript(redeemScript);
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if (!decode || decode.address !== sender)
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return reject("Invalid redeem-script");
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}
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try {
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({
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receivers,
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amounts
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} = validateTxParameters({
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receivers,
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amounts,
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fee,
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change_addr
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}));
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} catch (e) {
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return reject(e)
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}
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let total_amount = parseFloat(amounts.reduce((t, a) => t + a, 0).toFixed(8))
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//create transaction
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const tx = coinjs.transaction();
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addUTXOs(tx, senders, redeemScript, total_amount + fee).then(result => {
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if (result > 0)
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return reject("Insufficient Balance");
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addOutputs(tx, receivers, amounts, Math.abs(result), sender);
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resolve(tx.serialize());
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})
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})
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}
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btcOperator.getTx = txid => new Promise((resolve, reject) => {
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fetch_api(`get_tx/BTC/${txid}`)
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