(function (EXPORTS) { //btcOperator v1.2.9 /* BTC Crypto and API Operator */ const btcOperator = EXPORTS; const SATOSHI_IN_BTC = 1e8; const util = btcOperator.util = {}; util.Sat_to_BTC = value => parseFloat((value / SATOSHI_IN_BTC).toFixed(8)); util.BTC_to_Sat = value => parseInt(value * SATOSHI_IN_BTC); const torExitNodes = new Set(["185.241.208.232", "194.26.192.64", "171.25.193.25", "80.67.167.81", "192.42.116.187", "198.98.51.189", "89.58.26.216", "109.70.100.4", "149.56.22.133", "5.45.102.93", "178.17.174.14", "192.42.116.196", "185.220.101.4", "45.141.215.62", "94.102.51.15", "192.42.116.213", "107.189.28.166", "185.241.208.243", "45.141.215.80", "193.26.115.61", "192.42.116.175", "149.56.44.47", "107.189.13.91", "87.118.116.103", "178.17.171.102", "185.243.218.110", "192.42.116.208", "89.58.41.156", "2.58.56.43", "104.192.1.138", "45.95.169.184", "107.189.8.56", "176.58.121.177", "185.220.101.31", "45.141.215.200", "109.70.100.1", "185.244.192.175", "185.129.61.2", "144.172.118.41", "192.42.116.184", "45.151.167.10", "185.220.101.27", "91.203.144.194", "45.141.215.88", "179.43.182.232", "185.220.101.5", "109.70.100.2", "107.189.14.4", "94.16.116.81", "185.220.101.8", "185.220.101.12", "88.80.20.86", "23.154.177.15", "45.141.215.56", "5.42.66.6", "23.129.64.225", "104.244.75.74", "45.95.169.228", "37.187.5.192", "45.141.215.169", "109.70.100.66", "45.79.144.222", "185.227.68.78", "179.43.159.199", "2.57.122.246", "192.42.116.201", "185.220.102.248", "195.176.3.23", "45.138.16.42", "216.73.159.75", "185.165.169.239", "23.129.64.213", "109.70.100.6", "45.80.158.27", "45.138.16.240", "178.20.55.16", "192.42.116.173", "51.15.249.160", "192.42.116.200", "185.220.102.254", "45.141.215.63", "193.218.118.151", "192.42.116.211", "185.100.85.24", "185.195.71.12", "107.189.8.181", "193.189.100.199", "109.70.100.69", "185.100.87.250", "31.220.93.201", "89.236.112.100", "45.141.215.90", "185.35.202.222", "109.70.100.65", "95.142.161.63", "192.42.116.181", "192.42.116.23", "194.26.192.77", "193.189.100.198", "180.150.226.99", "23.129.64.227", "107.189.4.23", "45.141.215.235", "185.220.102.252", "109.70.100.67", "185.220.100.255", "185.220.101.21", "185.100.85.22", "128.31.0.13", "46.182.21.248", "192.42.116.174", "185.241.208.115", "185.220.101.1", "192.42.116.202", "45.141.215.97", "185.243.218.204", "78.142.18.219", "192.42.116.192", "190.120.229.98", "192.42.116.177", "45.138.16.113", "192.42.116.212", "185.220.101.3", "45.138.16.222", "5.42.80.232", "87.118.122.51", "107.189.11.166", "185.220.102.245", "185.220.102.251", "46.182.21.250", "5.255.103.235", "185.243.218.89", "185.193.52.180", "185.220.101.24", "2.57.122.215", "45.15.157.177", "185.220.100.253", "37.48.120.64", "204.8.156.142", "192.42.116.179", "185.220.100.240", "185.241.208.236", "185.195.71.244", "193.105.134.155", "51.15.59.15", "185.100.85.23", "45.151.167.11", "82.197.182.161", "192.42.116.191", "27.255.75.198", "171.25.193.79", "45.95.169.255", "45.138.16.230", "107.189.29.103", "163.172.213.212", "95.143.193.125", "23.154.177.7", "185.220.101.23", "195.176.3.24", "107.189.1.9", "192.42.116.182", "23.137.249.240", "192.42.116.189", "23.129.64.146", "45.138.16.107", "107.189.5.121", "107.189.30.236", "94.16.121.91", "109.70.100.70", "185.254.196.141", "194.15.112.133", "192.42.116.180", "173.249.57.253", "185.220.102.250", "185.100.85.25", "185.220.101.13", "185.220.101.25", "192.42.116.199", "23.154.177.2", "107.189.31.232", "45.141.215.81", "192.42.116.220", "185.67.82.114", "45.141.215.114", "185.243.218.61", "107.189.13.184", "107.189.10.141", "104.244.79.61", "185.106.94.195", "176.126.253.190", "23.154.177.22", "192.42.116.210", "185.220.102.249", "23.184.48.127", "192.42.116.218", "91.208.75.4", "192.42.116.178", "178.175.148.209", "208.109.36.224", "23.137.251.61", "94.142.241.194", "162.251.5.152", "23.154.177.4", "45.138.16.76", "45.9.150.103", "213.252.140.118", "185.243.218.95", "45.134.225.36", "109.70.100.5", "185.243.218.202", 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"185.220.101.60", "185.220.101.63", "185.220.101.54", "185.220.101.52", "185.220.101.62", "185.220.101.56", "185.220.101.44", "185.220.101.49", "5.255.117.56", "185.220.101.55", "185.220.101.45", "185.220.101.53", "185.220.101.59", "185.220.101.51", "185.220.101.48", "185.220.101.47", "185.220.101.50", "95.111.238.0", "152.89.233.169", "89.147.110.82", "176.58.117.81", "23.155.8.104", "51.89.153.112", "5.61.51.143", "5.135.174.213", "37.120.166.23", "37.252.255.135", "82.153.138.48", "185.81.115.120", "45.139.122.176", "84.211.225.54", "31.220.87.46", "144.172.73.6", "51.89.200.109", "212.44.107.82", "89.147.111.124", "94.177.106.59", "94.177.106.55", "94.177.106.46", "93.95.231.88", "152.32.238.235", "74.208.96.95", "38.242.239.62", "87.118.114.44", "80.78.25.9", "185.193.125.95", "107.173.179.59", "179.43.159.78", "81.17.28.95", "45.79.129.209", "82.221.139.190", "107.189.13.254", "81.19.137.127", "149.102.129.11", "81.0.218.34", "93.90.74.31", "51.81.254.4", "109.123.231.55", "185.196.8.2", "158.220.81.45", "62.149.23.133", "158.220.81.47", "158.220.81.78", "209.141.51.180", "176.121.81.51", "178.17.170.184", "202.61.226.98", "202.139.229.157", "89.147.111.106"]); const checkIfTor = btcOperator.checkIfTor = () => { return fetch('https://api.ipify.org?format=json').then(response => response.json()) .then(result => { return torExitNodes.has(result.ip) }).catch(e => { console.error(e) return false }) } let isTor = false; checkIfTor().then(result => isTor = result); async function post(url, data, { asText = false } = {}) { try { const response = await fetch(url, { method: 'POST', mode: 'no-cors', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) }) if (response.ok) { return asText ? await response.text() : await response.json() } else { throw response } } catch (e) { throw e } } // NOTE: some APIs may not support all functions properly hence they are omitted const APIs = btcOperator.APIs = [ { url: 'https://api.blockcypher.com/v1/btc/main/', name: 'Blockcypher', balance({ addr }) { return fetch_api(`addrs/${addr}/balance`, { url: this.url }) .then(result => util.Sat_to_BTC(result.balance)) }, async block({ id }) { try { let block = await fetch_api(`blocks/${id}`, { url: this.url }) return formatBlock(block) } catch (e) { console.log(e) } }, async broadcast({ rawTxHex, url }) { try { const result = await post(`${url || this.url}pushtx`, { tx: rawTxHex }) return result.hash } catch (e) { throw e } } }, { url: 'https://blockstream.info/api/', name: 'Blockstream', hasOnion: true, onionUrl: `http://explorerzydxu5ecjrkwceayqybizmpjjznk5izmitf2modhcusuqlid.onion/api/`, balance({ addr, url }) { return fetch_api(`address/${addr}/utxo`, { url: url || this.url }) .then(result => { const balance = result.reduce((t, u) => t + u.value, 0) return util.Sat_to_BTC(balance) }) }, latestBlock() { return fetch_api(`blocks/tip/height`, { url: this.url }) }, tx({ txid, url }) { return fetch_api(`tx/${txid}`, { url: url || this.url }) .then(result => formatTx(result)) }, txHex({ txid, url }) { return fetch_api(`tx/${txid}/hex`, { url: url || this.url, asText: true }) }, txs({ addr, url, ...args }) { let queryParams = Object.entries(args).map(([key, value]) => `${key}=${value}`).join('&') if (queryParams) queryParams = '?' + queryParams return fetch_api(`address/${addr}/txs${queryParams}`, { url: url || this.url }) }, async block({ id, url }) { // if id is hex string then it is block hash try { let blockHash = id if (!/^[0-9a-f]{64}$/i.test(id)) blockHash = await fetch_api(`block-height/${id}`, { url: url || this.url, asText: true }) const block = await fetch_api(`block/${blockHash}`, { url: url || this.url }) return formatBlock(block) } catch (e) { throw e } }, async broadcast({ rawTxHex, url }) { return post(`${url || this.url}tx`, { tx: rawTxHex }, { asText: true }) } }, { url: 'https://mempool.space/api/', name: 'Mempool', balance({ addr }) { return fetch_api(`address/${addr}`, { url: this.url }) .then(result => util.Sat_to_BTC(result.chain_stats.funded_txo_sum - result.chain_stats.spent_txo_sum)) }, latestBlock() { return fetch_api(`blocks/tip/height`, { url: this.url }) }, tx({ txid }) { return fetch_api(`tx/${txid}`, { url: this.url }) .then(result => formatTx(result)) }, txHex({ txid }) { return fetch_api(`tx/${txid}/hex`, { url: this.url, asText: true }) }, txs({ addr, ...args }) { let queryParams = Object.entries(args).map(([key, value]) => `${key}=${value}`).join('&') if (queryParams) queryParams = '?' + queryParams return fetch_api(`address/${addr}/txs${queryParams}`, { url: this.url }) }, async block({ id }) { // if id is hex string then it is block hash try { let blockHash = id if (!/^[0-9a-f]{64}$/i.test(id)) blockHash = await fetch_api(`block-height/${id}`, { url: this.url, asText: true }) const block = await fetch_api(`block/${blockHash}`, { url: this.url }) return formatBlock(block) } catch (e) { throw e } }, async broadcast({ rawTxHex, url }) { return post(`${url || this.url}tx`, { tx: rawTxHex }, { asText: true }) } }, { url: 'https://blockchain.info/', name: 'Blockchain', balance({ addr }) { return fetch_api(`q/addressbalance/${addr}`, { url: this.url }) .then(result => util.Sat_to_BTC(result)) }, unspent({ addr, allowUnconfirmedUtxos = false }) { return fetch_api(`unspent?active=${addr}`, { url: this.url }) .then(result => formatUtxos(result.unspent_outputs, allowUnconfirmedUtxos)) }, tx({ txid }) { return fetch_api(`rawtx/${txid}`, { url: this.url }) .then(result => formatTx(result)) }, txHex({ txid }) { return fetch_api(`rawtx/${txid}?format=hex`, { url: this.url, asText: true }) }, txs({ addr, ...args }) { let queryParams = Object.entries(args).map(([key, value]) => `${key}=${value}`).join('&') if (queryParams) queryParams = '?' + queryParams return fetch_api(`rawaddr/${addr}${queryParams}`, { url: this.url }) .then(result => result.txs) }, latestBlock() { return fetch_api(`q/getblockcount`, { url: this.url }) }, async block({ id }) { try { let block // if id is hex string then it is block hash if (/^[0-9a-f]{64}$/i.test(id)) block = await fetch_api(`rawblock/${id}`, { url: this.url }) else { const result = await fetch_api(`block-height/${id}?format=json`, { url: this.url }) block = result.blocks[0] } return formatBlock(block) } catch (e) { throw e } }, async blockTxs({ id }) { try { let block // if id is hex string then it is block hash if (/^[0-9a-f]{64}$/i.test(id)) block = await fetch_api(`rawblock/${id}`, { url: this.url }) else { const result = await fetch_api(`block-height/${id}?format=json`, { url: this.url }) block = result.blocks[0] } return block.tx } catch (e) { } } }, { url: 'https://coinb.in/api/?uid=1&key=12345678901234567890123456789012&setmodule=bitcoin&request=sendrawtransaction', name: 'Coinb.in', broadcast({ rawTxHex }) { return new Promise((resolve, reject) => { fetch(this.url, { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: "rawtx=" + rawTxHex }).then(response => { console.log(response) response.text().then(resultText => { let r = resultText.match(/.*<\/result>/); if (!r) reject(resultText); else { r = r.pop().replace('', '').replace('', ''); if (r == '1') { let txid = resultText.match(/.*<\/txid>/).pop().replace('', '').replace('', ''); resolve(txid); } else if (r == '0') { let error if (resultText.includes('')) { error = resultText.match(/.*<\/message>/).pop().replace('', '').replace('', ''); } else { error = resultText.match(/.*<\/response>/).pop().replace('', '').replace('', ''); } reject(decodeURIComponent(error.replace(/\+/g, " "))); } else reject(resultText); } }).catch(error => reject(error)) }).catch(error => reject(error)) }); } } ] btcOperator.util.format = {} // functions to homogenize API results const formatBlock = btcOperator.util.format.block = async (block) => { try { const { height, hash, id, time, timestamp, mrkl_root, merkle_root, prev_block, next_block, size } = block; const details = { height, hash: hash || id, time: (time || timestamp) * 1000, merkle_root: merkle_root || mrkl_root, size, } if (prev_block) details.prev_block = prev_block if (next_block) details.next_block = next_block[0] return details } catch (e) { throw e } } const formatUtxos = btcOperator.util.format.utxos = async (utxos, allowUnconfirmedUtxos = false) => { try { if (!allowUnconfirmedUtxos && !utxos || !Array.isArray(utxos)) throw { message: "No utxos found", code: 1000 //error code for when issue is not from API but situational (like no utxos found) } return utxos.map(utxo => { const { tx_hash, tx_hash_big_endian, txid, tx_output_n, vout, value, script, confirmations, status: { confirmed } = {} } = utxo; return { confirmations: confirmations || confirmed, tx_hash_big_endian: tx_hash_big_endian || tx_hash || txid, tx_output_n: tx_output_n || vout, value, script } }) } catch (e) { throw e } } const formatTx = btcOperator.util.format.tx = async (tx) => { try { let { txid, hash, time, block_height, fee, fees, received, confirmed, size, double_spend, block_hash, confirmations, status: { block_height: statusBlockHeight, block_hash: statusBlockHash, block_time } = {} } = tx; if ((block_height || statusBlockHeight) && confirmations === undefined || confirmations === null) { const latestBlock = await multiApi('latestBlock'); confirmations = latestBlock - (block_height || statusBlockHeight); } const inputs = tx.vin || tx.inputs; const outputs = tx.vout || tx.outputs || tx.out; return { hash: hash || txid, size: size, fee: fee || fees, double_spend, time: (time * 1000) || new Date(confirmed || received).getTime() || block_time * 1000 || Date.now(), block_height: block_height || statusBlockHeight, block_hash: block_hash || statusBlockHash, confirmations, inputs: inputs.map(input => { return { index: input.n || input.output_index || input.vout, prev_out: { addr: input.prev_out?.addr || input.addresses?.[0] || input.prev_out?.address || input.addr || input.prevout.scriptpubkey_address, value: input.prev_out?.value || input.output_value || input.prevout.value, }, } }), out: outputs.map(output => { return { addr: output.scriptpubkey_address || output.addresses?.[0] || output.scriptpubkey_address || output.addr, value: output.value || output.scriptpubkey_value, } }) } } catch (e) { throw e } } const multiApi = btcOperator.multiApi = async (fnName, { index = 0, ...args } = {}) => { try { let triedOnion = false; while (index < APIs.length) { if (!APIs[index][fnName] || (APIs[index].coolDownTime && APIs[index].coolDownTime > new Date().getTime())) { index += 1; continue; } return await APIs[index][fnName](args); } if (isTor && !triedOnion) { triedOnion = true; index = 0; while (index < APIs.length) { if (!APIs[index].hasOnion || (APIs[index].coolDownTime && APIs[index].coolDownTime > new Date().getTime())) { index += 1; continue; } return await multiApi(fnName, { index: index + 1, ...args, url: APIs[index].onionUrl }); } } throw "No API available" } catch (error) { console.error(error) APIs[index].coolDownTime = new Date().getTime() + 1000 * 60 * 10; // 10 minutes return multiApi(fnName, { index: index + 1, ...args }); } }; function parseTx(tx, addressOfTx) { const { txid, hash, time, block_height, inputs, outputs, out, vin, vout, fee, fees, received, confirmed, status: { block_height: statusBlockHeight, block_time } = {} } = tx; let parsedTx = { txid: hash || txid, time: (time * 1000) || new Date(confirmed || received).getTime() || block_time * 1000 || Date.now(), block: block_height || statusBlockHeight, } //sender list parsedTx.tx_senders = {}; (inputs || vin).forEach(i => { const address = i.prev_out?.addr || i.addresses?.[0] || i.prev_out?.address || i.addr || i.prevout.scriptpubkey_address; const value = i.prev_out?.value || i.output_value || i.value || i.prevout.value; if (address in parsedTx.tx_senders) parsedTx.tx_senders[address] += value; else parsedTx.tx_senders[address] = value; }); parsedTx.tx_input_value = 0; for (let senderAddr in parsedTx.tx_senders) { let val = parsedTx.tx_senders[senderAddr]; parsedTx.tx_senders[senderAddr] = util.Sat_to_BTC(val); parsedTx.tx_input_value += val; } parsedTx.tx_input_value = util.Sat_to_BTC(parsedTx.tx_input_value); //receiver list parsedTx.tx_receivers = {}; (outputs || out || vout).forEach(o => { const address = o.scriptpubkey_address || o.addresses?.[0] || o.scriptpubkey_address || o.addr; const value = o.value || o.scriptpubkey_value; if (address in parsedTx.tx_receivers) parsedTx.tx_receivers[address] += value; else parsedTx.tx_receivers[address] = value; }); parsedTx.tx_output_value = 0; for (let receiverAddr in parsedTx.tx_receivers) { let val = parsedTx.tx_receivers[receiverAddr]; parsedTx.tx_receivers[receiverAddr] = util.Sat_to_BTC(val); parsedTx.tx_output_value += val; } parsedTx.tx_output_value = util.Sat_to_BTC(parsedTx.tx_output_value); // tx fee parsedTx.tx_fee = util.Sat_to_BTC(fee || fees || (parsedTx.tx_input_value - parsedTx.tx_output_value)); //detect tx type (in, out, self) if (Object.keys(parsedTx.tx_receivers).length === 1 && Object.keys(parsedTx.tx_senders).length === 1 && Object.keys(parsedTx.tx_senders)[0] === Object.keys(parsedTx.tx_receivers)[0]) { parsedTx.type = 'self'; parsedTx.amount = parsedTx.tx_receivers[addressOfTx]; parsedTx.address = addressOfTx; } else if (addressOfTx in parsedTx.tx_senders && Object.keys(parsedTx.tx_receivers).some(addr => addr !== addressOfTx)) { parsedTx.type = 'out'; parsedTx.receiver = Object.keys(parsedTx.tx_receivers).filter(addr => addr != addressOfTx); parsedTx.amount = parsedTx.receiver.reduce((t, addr) => t + parsedTx.tx_receivers[addr], 0) + parsedTx.tx_fee; } else { parsedTx.type = 'in'; parsedTx.sender = Object.keys(parsedTx.tx_senders).filter(addr => addr != addressOfTx); parsedTx.amount = parsedTx.tx_receivers[addressOfTx]; } return parsedTx; } const DUST_AMT = 546, MIN_FEE_UPDATE = 219; const fetch_api = btcOperator.fetch = function (api, { asText = false, url = 'https://blockchain.info/' } = {}) { return new Promise((resolve, reject) => { console.debug(url + api); fetch(url + api).then(response => { if (response.ok) { (asText ? response.text() : response.json()) .then(result => resolve(result)) .catch(error => reject(error)) } else { response.json() .then(result => reject(result)) .catch(error => reject(error)) } }).catch(error => reject(error)) }) }; function get_fee_rate() { return new Promise((resolve, reject) => { fetch('https://api.blockchain.info/mempool/fees').then(response => { if (response.ok) response.json() .then(result => resolve(util.Sat_to_BTC(result.regular))) .catch(error => reject(error)); else reject(response); }).catch(error => reject(error)) }) } const broadcastTx = btcOperator.broadcastTx = rawTxHex => new Promise((resolve, reject) => { console.log('txHex:', rawTxHex) // return multiApi('broadcast', { rawTxHex }) // .then(result => { // resolve(result) // }) // .catch(error => { // reject(error) // }) let url = 'https://coinb.in/api/?uid=1&key=12345678901234567890123456789012&setmodule=bitcoin&request=sendrawtransaction'; fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: "rawtx=" + rawTxHex }).then(response => { console.log(response) response.text().then(resultText => { let r = resultText.match(/.*<\/result>/); if (!r) reject(resultText); else { r = r.pop().replace('', '').replace('', ''); if (r == '1') { let txid = resultText.match(/.*<\/txid>/).pop().replace('', '').replace('', ''); resolve(txid); } else if (r == '0') { let error if (resultText.includes('')) { error = resultText.match(/.*<\/message>/).pop().replace('', '').replace('', ''); } else { error = resultText.match(/.*<\/response>/).pop().replace('', '').replace('', ''); } reject(decodeURIComponent(error.replace(/\+/g, " "))); } else reject(resultText); } }).catch(error => reject(error)) }).catch(error => reject(error)) }); Object.defineProperties(btcOperator, { newKeys: { get: () => { let r = coinjs.newKeys(); r.segwitAddress = coinjs.segwitAddress(r.pubkey).address; r.bech32Address = coinjs.bech32Address(r.pubkey).address; return r; } }, pubkey: { value: key => key.length >= 66 ? key : (key.length == 64 ? coinjs.newPubkey(key) : coinjs.wif2pubkey(key).pubkey) }, address: { value: (key, prefix = undefined) => coinjs.pubkey2address(btcOperator.pubkey(key), prefix) }, segwitAddress: { value: key => coinjs.segwitAddress(btcOperator.pubkey(key)).address }, bech32Address: { value: key => coinjs.bech32Address(btcOperator.pubkey(key)).address }, bech32mAddress: { value: key => segwit_addr.encode("bc", 1, key) } }); coinjs.compressed = true; const verifyKey = btcOperator.verifyKey = function (addr, key) { if (!addr || !key) return undefined; switch (coinjs.addressDecode(addr).type) { case "standard": return btcOperator.address(key) === addr; case "multisig": return btcOperator.segwitAddress(key) === addr; case "bech32": return btcOperator.bech32Address(key) === addr; case "bech32m": return btcOperator.bech32mAddress(key) === addr; // Key is a byte array of 32 bytes default: return null; } } const validateAddress = btcOperator.validateAddress = function (addr) { if (!addr) return undefined; let type = coinjs.addressDecode(addr).type; if (["standard", "multisig", "bech32", "multisigBech32", "bech32m"].includes(type)) return type; else return false; } btcOperator.multiSigAddress = function (pubKeys, minRequired, bech32 = true) { if (!Array.isArray(pubKeys)) throw "pubKeys must be an array of public keys"; else if (pubKeys.length < minRequired) throw "minimum required should be less than the number of pubKeys"; if (bech32) return coinjs.pubkeys2MultisigAddressBech32(pubKeys, minRequired); else return coinjs.pubkeys2MultisigAddress(pubKeys, minRequired); } btcOperator.decodeRedeemScript = function (redeemScript, bech32 = true) { let script = coinjs.script(); let decoded = (bech32) ? script.decodeRedeemScriptBech32(redeemScript) : script.decodeRedeemScript(redeemScript); if (!decoded) return null; return { address: decoded.address, pubKeys: decoded.pubkeys, redeemScript: decoded.redeemscript, required: decoded.signaturesRequired } } //convert from one blockchain to another blockchain (target version) btcOperator.convert = {}; btcOperator.convert.wif = function (source_wif, target_version = coinjs.priv) { let keyHex = util.decodeLegacy(source_wif).hex; if (!keyHex || keyHex.length < 66 || !/01$/.test(keyHex)) return null; else return util.encodeLegacy(keyHex, target_version); } btcOperator.convert.legacy2legacy = function (source_addr, target_version = coinjs.pub) { let rawHex = util.decodeLegacy(source_addr).hex; if (!rawHex) return null; else return util.encodeLegacy(rawHex, target_version); } btcOperator.convert.legacy2bech = function (source_addr, target_version = coinjs.bech32.version, target_hrp = coinjs.bech32.hrp) { let rawHex = util.decodeLegacy(source_addr).hex; if (!rawHex) return null; else return util.encodeBech32(rawHex, target_version, target_hrp); } btcOperator.convert.bech2bech = function (source_addr, target_version = coinjs.bech32.version, target_hrp = coinjs.bech32.hrp) { let rawHex = util.decodeBech32(source_addr).hex; if (!rawHex) return null; else return util.encodeBech32(rawHex, target_version, target_hrp); } btcOperator.convert.bech2legacy = function (source_addr, target_version = coinjs.pub) { let rawHex = util.decodeBech32(source_addr).hex; if (!rawHex) return null; else return util.encodeLegacy(rawHex, target_version); } btcOperator.convert.multisig2multisig = function (source_addr, target_version = coinjs.multisig) { let rawHex = util.decodeLegacy(source_addr).hex; if (!rawHex) return null; else return util.encodeLegacy(rawHex, target_version); } btcOperator.convert.bech2multisig = function (source_addr, target_version = coinjs.multisig) { let rawHex = util.decodeBech32(source_addr).hex; if (!rawHex) return null; else { rawHex = Crypto.util.bytesToHex(ripemd160(Crypto.util.hexToBytes(rawHex), { asBytes: true })); return util.encodeLegacy(rawHex, target_version); } } util.decodeLegacy = function (source) { var decode = coinjs.base58decode(source); var raw = decode.slice(0, decode.length - 4), checksum = decode.slice(decode.length - 4); var hash = Crypto.SHA256(Crypto.SHA256(raw, { asBytes: true }), { asBytes: true }); if (hash[0] != checksum[0] || hash[1] != checksum[1] || hash[2] != checksum[2] || hash[3] != checksum[3]) return false; let version = raw.shift(); return { version: version, hex: Crypto.util.bytesToHex(raw) } } util.encodeLegacy = function (hex, version) { var bytes = Crypto.util.hexToBytes(hex); bytes.unshift(version); var hash = Crypto.SHA256(Crypto.SHA256(bytes, { asBytes: true }), { asBytes: true }); var checksum = hash.slice(0, 4); return coinjs.base58encode(bytes.concat(checksum)); } util.decodeBech32 = function (source) { let decode = coinjs.bech32_decode(source); if (!decode) return false; var raw = decode.data; let version = raw.shift(); raw = coinjs.bech32_convert(raw, 5, 8, false); return { hrp: decode.hrp, version: version, hex: Crypto.util.bytesToHex(raw) } } util.encodeBech32 = function (hex, version, hrp) { var bytes = Crypto.util.hexToBytes(hex); bytes = coinjs.bech32_convert(bytes, 8, 5, true); bytes.unshift(version) return coinjs.bech32_encode(hrp, bytes); } //BTC blockchain APIs btcOperator.getBalance = addr => new Promise((resolve, reject) => { if (!validateAddress(addr)) return reject("Invalid address"); multiApi('balance', { addr }) .then(result => resolve(result)) .catch(error => reject(error)) }); const BASE_TX_SIZE = 12, BASE_INPUT_SIZE = 41, LEGACY_INPUT_SIZE = 107, BECH32_INPUT_SIZE = 27, BECH32_MULTISIG_INPUT_SIZE = 35, SEGWIT_INPUT_SIZE = 59, MULTISIG_INPUT_SIZE_ES = 351, BASE_OUTPUT_SIZE = 9, LEGACY_OUTPUT_SIZE = 25, BECH32_OUTPUT_SIZE = 23, BECH32_MULTISIG_OUTPUT_SIZE = 34, SEGWIT_OUTPUT_SIZE = 23; BECH32M_OUTPUT_SIZE = 35; // Check this later function _redeemScript(addr, key) { let decode = coinjs.addressDecode(addr); switch (decode.type) { case "standard": return false; case "multisig": return key ? coinjs.segwitAddress(btcOperator.pubkey(key)).redeemscript : null; case "bech32": return decode.redeemscript; case "'multisigBech32": return decode.redeemscript; //Multisig-edit-fee-change1 case "bech32m": return decode.outstring; //Maybe the redeemscript will come when input processing happens for bech32m default: return null; } } btcOperator._redeemScript = _redeemScript; function _sizePerInput(addr, rs) { switch (coinjs.addressDecode(addr).type) { case "standard": return BASE_INPUT_SIZE + LEGACY_INPUT_SIZE; case "bech32": return BASE_INPUT_SIZE + BECH32_INPUT_SIZE; case "multisigBech32": return BASE_INPUT_SIZE + BECH32_MULTISIG_INPUT_SIZE; case "multisig": switch (coinjs.script().decodeRedeemScript(rs).type) { case "segwit__": return BASE_INPUT_SIZE + SEGWIT_INPUT_SIZE; case "multisig__": return BASE_INPUT_SIZE + MULTISIG_INPUT_SIZE_ES; default: return null; }; default: return null; } } function _sizePerOutput(addr) { switch (coinjs.addressDecode(addr).type) { case "standard": return BASE_OUTPUT_SIZE + LEGACY_OUTPUT_SIZE; case "bech32": return BASE_OUTPUT_SIZE + BECH32_OUTPUT_SIZE; case "multisigBech32": return BASE_OUTPUT_SIZE + BECH32_MULTISIG_OUTPUT_SIZE; case "multisig": return BASE_OUTPUT_SIZE + SEGWIT_OUTPUT_SIZE; case "bech32m": return BASE_OUTPUT_SIZE + BECH32M_OUTPUT_SIZE; default: return null; } } function validateTxParameters(parameters) { let invalids = []; //sender-ids if (parameters.senders) { if (!Array.isArray(parameters.senders)) parameters.senders = [parameters.senders]; parameters.senders.forEach(id => !validateAddress(id) ? invalids.push(id) : null); if (invalids.length) throw "Invalid senders:" + invalids; } if (parameters.privkeys) { if (!Array.isArray(parameters.privkeys)) parameters.privkeys = [parameters.privkeys]; if (parameters.senders.length != parameters.privkeys.length) throw "Array length for senders and privkeys should be equal"; parameters.senders.forEach((id, i) => { let key = parameters.privkeys[i]; if (!verifyKey(id, key)) //verify private-key invalids.push(id); if (key.length === 64) //convert Hex to WIF if needed parameters.privkeys[i] = coinjs.privkey2wif(key); }); if (invalids.length) throw "Invalid private key for address:" + invalids; } //receiver-ids (and change-id) if (!Array.isArray(parameters.receivers)) parameters.receivers = [parameters.receivers]; parameters.receivers.forEach(id => !validateAddress(id) ? invalids.push(id) : null); if (invalids.length) throw "Invalid receivers:" + invalids; if (parameters.change_address && !validateAddress(parameters.change_address)) throw "Invalid change_address:" + parameters.change_address; //fee and amounts if ((typeof parameters.fee !== "number" || parameters.fee <= 0) && parameters.fee !== null) //fee = null (auto calc) throw "Invalid fee:" + parameters.fee; if (!Array.isArray(parameters.amounts)) parameters.amounts = [parameters.amounts]; if (parameters.receivers.length != parameters.amounts.length) throw "Array length for receivers and amounts should be equal"; parameters.amounts.forEach(a => typeof a !== "number" || a <= 0 ? invalids.push(a) : null); if (invalids.length) throw "Invalid amounts:" + invalids; //return return parameters; } btcOperator.validateTxParameters = validateTxParameters; const createTransaction = btcOperator.createTransaction = ({ senders, redeemScripts, receivers, amounts, fee, change_address, fee_from_receiver, allowUnconfirmedUtxos = false, sendingTx = false, hasInsufficientBalance = false }) => { return new Promise((resolve, reject) => { let total_amount = parseFloat(amounts.reduce((t, a) => t + a, 0).toFixed(8)); const tx = coinjs.transaction(); let output_size = addOutputs(tx, receivers, amounts, change_address); addInputs(tx, senders, redeemScripts, total_amount, fee, output_size, fee_from_receiver, allowUnconfirmedUtxos).then(result => { if (result.change_amount > 0 && result.change_amount > result.fee) //add change amount if any (ignore dust change) tx.outs[tx.outs.length - 1].value = util.BTC_to_Sat(result.change_amount); //values are in satoshi if (fee_from_receiver) { //deduce fee from receivers if fee_from_receiver let fee_remaining = util.BTC_to_Sat(result.fee); for (let i = 0; i < tx.outs.length - 1 && fee_remaining > 0; i++) { if (fee_remaining < tx.outs[i].value) { tx.outs[i].value -= fee_remaining; fee_remaining = 0; } else { fee_remaining -= tx.outs[i].value; tx.outs[i].value = 0; } } if (fee_remaining > 0) return reject("Send amount is less than fee"); } //remove all output with value less than DUST amount let filtered_outputs = [], dust_value = 0; tx.outs.forEach(o => o.value >= DUST_AMT ? filtered_outputs.push(o) : dust_value += o.value); tx.outs = filtered_outputs; //update result values result.fee += util.Sat_to_BTC(dust_value); result.output_size = output_size; result.output_amount = total_amount - (fee_from_receiver ? result.fee : 0); result.total_size = BASE_TX_SIZE + output_size + result.input_size; result.transaction = tx; if (sendingTx && result.hasOwnProperty('hasInsufficientBalance') && result.hasInsufficientBalance) reject({ message: "Insufficient balance", ...result }); else resolve(result); }).catch(error => reject(error)) }) } function addInputs(tx, senders, redeemScripts, total_amount, fee, output_size, fee_from_receiver, allowUnconfirmedUtxos = false) { return new Promise((resolve, reject) => { if (fee !== null) { addUTXOs(tx, senders, redeemScripts, fee_from_receiver ? total_amount : total_amount + fee, false, { allowUnconfirmedUtxos }).then(result => { result.fee = fee; resolve(result); }).catch(error => reject(error)) } else { get_fee_rate().then(fee_rate => { let net_fee = BASE_TX_SIZE * fee_rate; net_fee += (output_size * fee_rate); (fee_from_receiver ? addUTXOs(tx, senders, redeemScripts, total_amount, false, { allowUnconfirmedUtxos }) : addUTXOs(tx, senders, redeemScripts, total_amount + net_fee, fee_rate, { allowUnconfirmedUtxos }) ).then(result => { result.fee = parseFloat((net_fee + (result.input_size * fee_rate)).toFixed(8)); result.fee_rate = fee_rate; resolve(result); }).catch(error => reject(error)) }).catch(error => reject(error)) } }) } btcOperator.addInputs = addInputs; function addUTXOs(tx, senders, redeemScripts, required_amount, fee_rate, rec_args = { allowUnconfirmedUtxos: false }) { return new Promise((resolve, reject) => { required_amount = parseFloat(required_amount.toFixed(8)); if (typeof rec_args.n === "undefined") { rec_args.n = 0; rec_args.input_size = 0; rec_args.input_amount = 0; } if (required_amount <= 0) return resolve({ input_size: rec_args.input_size, input_amount: rec_args.input_amount, change_amount: required_amount * -1 //required_amount will be -ve of change_amount }); else if (rec_args.n >= senders.length) { return resolve({ hasInsufficientBalance: true, input_size: rec_args.input_size, input_amount: rec_args.input_amount, change_amount: required_amount * -1 }); } let addr = senders[rec_args.n], rs = redeemScripts[rec_args.n]; let addr_type = coinjs.addressDecode(addr).type; let size_per_input = _sizePerInput(addr, rs); multiApi('unspent', { addr, allowUnconfirmedUtxos: rec_args.allowUnconfirmedUtxos }).then(utxos => { //console.debug("add-utxo", addr, rs, required_amount, utxos); for (let i = 0; i < utxos.length && required_amount > 0; i++) { if (utxos.length === 1 && rec_args.allowUnconfirmedUtxos) { console.log('allowing unconfirmed utxos') } else if (!utxos[i].confirmations) //ignore unconfirmed utxo continue; var script; if (!rs || !rs.length) //legacy script script = utxos[i].script; else if (((rs.match(/^00/) && rs.length == 44)) || (rs.length == 40 && rs.match(/^[a-f0-9]+$/gi)) || addr_type === 'multisigBech32') { //redeemScript for segwit/bech32 and multisig (bech32) let s = coinjs.script(); s.writeBytes(Crypto.util.hexToBytes(rs)); s.writeOp(0); s.writeBytes(coinjs.numToBytes(utxos[i].value.toFixed(0), 8)); script = Crypto.util.bytesToHex(s.buffer); } else //redeemScript for multisig (segwit) script = rs; tx.addinput(utxos[i].tx_hash_big_endian, utxos[i].tx_output_n, script, 0xfffffffd /*sequence*/); //0xfffffffd for Replace-by-fee //update track values rec_args.input_size += size_per_input; rec_args.input_amount += util.Sat_to_BTC(utxos[i].value); required_amount -= util.Sat_to_BTC(utxos[i].value); if (fee_rate) //automatic fee calculation (dynamic) required_amount += size_per_input * fee_rate; } rec_args.n += 1; addUTXOs(tx, senders, redeemScripts, required_amount, fee_rate, rec_args) .then(result => resolve(result)) .catch(error => reject(error)) }).catch(error => reject(error)) }) } btcOperator.addUTXOs = addUTXOs; function addOutputs(tx, receivers, amounts, change_address) { let size = 0; for (let i in receivers) { tx.addoutput(receivers[i], amounts[i]); size += _sizePerOutput(receivers[i]); } tx.addoutput(change_address, 0); size += _sizePerOutput(change_address); return size; } btcOperator.addOutputs = addOutputs; function tx_fetch_for_editing(tx) { return new Promise((resolve, reject) => { if (typeof tx == 'string' && /^[0-9a-f]{64}$/i.test(tx)) { //tx is txid getTx.hex(tx) .then(txhex => resolve(deserializeTx(txhex))) .catch(error => reject(error)) } else resolve(deserializeTx(tx)); }) } btcOperator.tx_fetch_for_editing = tx_fetch_for_editing; const extractLastHexStrings = btcOperator.extractLastHexStrings = function (arr) { const result = []; for (let i = 0; i < arr.length; i++) { const innerArray = arr[i]; if (innerArray.length > 0) { const lastHexString = innerArray[innerArray.length - 1]; result.push(lastHexString); } } return result; } btcOperator.editFee = function (tx_hex, new_fee, private_keys, change_only = true) { return new Promise((resolve, reject) => { if (!Array.isArray(private_keys)) private_keys = [private_keys]; tx_fetch_for_editing(tx_hex).then(tx => { parseTransaction(tx).then(tx_parsed => { if (tx_parsed.fee >= new_fee) return reject("Fees can only be increased"); //editable addresses in output values (for fee increase) var edit_output_address = new Set(); if (change_only === true) //allow only change values (ie, sender address) to be edited to inc fee tx_parsed.inputs.forEach(inp => edit_output_address.add(inp.address)); else if (change_only === false) //allow all output values to be edited tx_parsed.outputs.forEach(out => edit_output_address.add(out.address)); else if (typeof change_only == 'string') // allow only given receiver id output to be edited edit_output_address.add(change_only); else if (Array.isArray(change_only)) //allow only given set of receiver id outputs to be edited change_only.forEach(id => edit_output_address.add(id)); //edit output values to increase fee let inc_fee = util.BTC_to_Sat(new_fee - tx_parsed.fee); if (inc_fee < MIN_FEE_UPDATE) return reject(`Insufficient additional fee. Minimum increment: ${MIN_FEE_UPDATE}`); for (let i = tx.outs.length - 1; i >= 0 && inc_fee > 0; i--) //reduce in reverse order if (edit_output_address.has(tx_parsed.outputs[i].address)) { let current_value = tx.outs[i].value; if (current_value instanceof BigInteger) //convert BigInteger class to inv value current_value = current_value.intValue(); //edit the value as required if (current_value > inc_fee) { tx.outs[i].value = current_value - inc_fee; inc_fee = 0; } else { inc_fee -= current_value; tx.outs[i].value = 0; } } if (inc_fee > 0) { let max_possible_fee = util.BTC_to_Sat(new_fee) - inc_fee; //in satoshi return reject(`Insufficient output values to increase fee. Maximum fee possible: ${util.Sat_to_BTC(max_possible_fee)}`); } tx.outs = tx.outs.filter(o => o.value >= DUST_AMT); //remove all output with value less than DUST amount //remove existing signatures and reset the scripts let wif_keys = []; for (let i in tx.ins) { var addr = tx_parsed.inputs[i].address, value = util.BTC_to_Sat(tx_parsed.inputs[i].value); let addr_decode = coinjs.addressDecode(addr); //find the correct key for addr var privKey = private_keys.find(pk => verifyKey(addr, pk)); if (!privKey) return reject(`Private key missing for ${addr}`); //find redeemScript (if any) const rs = _redeemScript(addr, privKey); rs === false ? wif_keys.unshift(privKey) : wif_keys.push(privKey); //sorting private-keys (wif) //reset the script for re-signing var script; if (!rs || !rs.length) { //legacy script (derive from address) let s = coinjs.script(); s.writeOp(118); //OP_DUP s.writeOp(169); //OP_HASH160 s.writeBytes(addr_decode.bytes); s.writeOp(136); //OP_EQUALVERIFY s.writeOp(172); //OP_CHECKSIG script = Crypto.util.bytesToHex(s.buffer); } else if (((rs.match(/^00/) && rs.length == 44)) || (rs.length == 40 && rs.match(/^[a-f0-9]+$/gi)) || addr_decode.type === 'multisigBech32') { //redeemScript for segwit/bech32 and multisig (bech32) let s = coinjs.script(); s.writeBytes(Crypto.util.hexToBytes(rs)); s.writeOp(0); s.writeBytes(coinjs.numToBytes(value.toFixed(0), 8)); script = Crypto.util.bytesToHex(s.buffer); } else //redeemScript for multisig (segwit) script = rs; tx.ins[i].script = coinjs.script(script); } tx.witness = false; //remove all witness signatures console.debug("Unsigned:", tx.serialize()); //re-sign the transaction new Set(wif_keys).forEach(key => tx.sign(key, 1 /*sighashtype*/)); //Sign the tx using private key WIF resolve(tx.serialize()); }).catch(error => reject(error)) }).catch(error => reject(error)) }) } btcOperator.editFee_corewallet = function (tx_hex, new_fee, private_keys, change_only = true) { return new Promise((resolve, reject) => { if (!Array.isArray(private_keys)) private_keys = [private_keys]; tx_fetch_for_editing(tx_hex).then(tx => { parseTransaction(tx).then(tx_parsed => { if (tx_parsed.fee >= new_fee) return reject("Fees can only be increased"); //editable addresses in output values (for fee increase) var edit_output_address = new Set(); if (change_only === true) //allow only change values (ie, sender address) to be edited to inc fee tx_parsed.inputs.forEach(inp => edit_output_address.add(inp.address)); else if (change_only === false) //allow all output values to be edited tx_parsed.outputs.forEach(out => edit_output_address.add(out.address)); else if (typeof change_only == 'string') // allow only given receiver id output to be edited edit_output_address.add(change_only); else if (Array.isArray(change_only)) //allow only given set of receiver id outputs to be edited change_only.forEach(id => edit_output_address.add(id)); //edit output values to increase fee let inc_fee = util.BTC_to_Sat(new_fee - tx_parsed.fee); if (inc_fee < MIN_FEE_UPDATE) return reject(`Insufficient additional fee. Minimum increment: ${MIN_FEE_UPDATE}`); for (let i = tx.outs.length - 1; i >= 0 && inc_fee > 0; i--) //reduce in reverse order if (edit_output_address.has(tx_parsed.outputs[i].address)) { let current_value = tx.outs[i].value; if (current_value instanceof BigInteger) //convert BigInteger class to inv value current_value = current_value.intValue(); //edit the value as required if (current_value > inc_fee) { tx.outs[i].value = current_value - inc_fee; inc_fee = 0; } else { inc_fee -= current_value; tx.outs[i].value = 0; } } if (inc_fee > 0) { let max_possible_fee = util.BTC_to_Sat(new_fee) - inc_fee; //in satoshi return reject(`Insufficient output values to increase fee. Maximum fee possible: ${util.Sat_to_BTC(max_possible_fee)}`); } tx.outs = tx.outs.filter(o => o.value >= DUST_AMT); //remove all output with value less than DUST amount //remove existing signatures and reset the scripts let wif_keys = []; let witness_position = 0; for (let i in tx.ins) { var addr = tx_parsed.inputs[i].address, value = util.BTC_to_Sat(tx_parsed.inputs[i].value); let addr_decode = coinjs.addressDecode(addr); //find the correct key for addr var privKey = private_keys.find(pk => verifyKey(addr, pk)); if (!privKey) return reject(`Private key missing for ${addr}`); //find redeemScript (if any) const rs = _redeemScript(addr, privKey); rs === false ? wif_keys.unshift(privKey) : wif_keys.push(privKey); //sorting private-keys (wif) //reset the script for re-signing var script; if (!rs || !rs.length) { //legacy script (derive from address) let s = coinjs.script(); s.writeOp(118); //OP_DUP s.writeOp(169); //OP_HASH160 s.writeBytes(addr_decode.bytes); s.writeOp(136); //OP_EQUALVERIFY s.writeOp(172); //OP_CHECKSIG script = Crypto.util.bytesToHex(s.buffer); } else if (((rs.match(/^00/) && rs.length == 44)) || (rs.length == 40 && rs.match(/^[a-f0-9]+$/gi))) { //redeemScript for segwit/bech32 let s = coinjs.script(); s.writeBytes(Crypto.util.hexToBytes(rs)); s.writeOp(0); s.writeBytes(coinjs.numToBytes(value.toFixed(0), 8)); script = Crypto.util.bytesToHex(s.buffer); if (addr_decode == "bech32") { witness_position = witness_position + 1; } //bech32 has witness } else if (addr_decode.type === 'multisigBech32') { var rs_array = []; rs_array = btcOperator.extractLastHexStrings(tx.witness); let redeemScript = rs_array[witness_position]; witness_position = witness_position + 1; //redeemScript multisig (bech32) let s = coinjs.script(); s.writeBytes(Crypto.util.hexToBytes(redeemScript)); s.writeOp(0); s.writeBytes(coinjs.numToBytes(value.toFixed(0), 8)); script = Crypto.util.bytesToHex(s.buffer); } else //redeemScript for multisig (segwit) script = rs; tx.ins[i].script = coinjs.script(script); } tx.witness = false; //remove all witness signatures console.debug("Unsigned:", tx.serialize()); //re-sign the transaction new Set(wif_keys).forEach(key => tx.sign(key, 1 /*sighashtype*/)); //Sign the tx using private key WIF if (btcOperator.checkSigned(tx)) { resolve(tx.serialize()); } else { reject("All private keys not present"); } }).catch(error => reject(error)) }).catch(error => reject(error)) }) } btcOperator.sendTx = function (senders, privkeys, receivers, amounts, fee = null, options = {}) { options.sendingTx = true; return new Promise((resolve, reject) => { createSignedTx(senders, privkeys, receivers, amounts, fee, options).then(result => { broadcastTx(result.transaction.serialize()) .then(txid => resolve(txid)) .catch(error => reject(error)); }).catch(error => reject(error)) }) } const createSignedTx = btcOperator.createSignedTx = function (senders, privkeys, receivers, amounts, fee = null, options = {}) { return new Promise((resolve, reject) => { try { ({ senders, privkeys, receivers, amounts } = validateTxParameters({ senders, privkeys, receivers, amounts, fee, ...options })); } catch (e) { return reject(e) } let redeemScripts = [], wif_keys = []; for (let i in senders) { let rs = _redeemScript(senders[i], privkeys[i]); //get redeem-script (segwit/bech32) redeemScripts.push(rs); rs === false ? wif_keys.unshift(privkeys[i]) : wif_keys.push(privkeys[i]); //sorting private-keys (wif) } if (redeemScripts.includes(null)) //TODO: segwit return reject("Unable to get redeem-script"); //create transaction createTransaction({ senders, redeemScripts, receivers, amounts, fee, change_address: options.change_address || senders[0], ...options }).then(result => { let tx = result.transaction; console.debug("Unsigned:", tx.serialize()); new Set(wif_keys).forEach(key => tx.sign(key, 1 /*sighashtype*/)); //Sign the tx using private key WIF console.debug("Signed:", tx.serialize()); resolve(result); }).catch(error => reject(error)); }) } btcOperator.createTx = function (senders, receivers, amounts, fee = null, options = { allowUnconfirmedUtxos: false }) { return new Promise((resolve, reject) => { try { ({ senders, receivers, amounts } = validateTxParameters({ senders, receivers, amounts, fee, change_address: options.change_address })); } catch (e) { return reject(e) } let redeemScripts = senders.map(id => _redeemScript(id)); if (redeemScripts.includes(null)) //TODO: segwit return reject("Unable to get redeem-script"); //create transaction createTransaction({ senders, redeemScripts, receivers, amounts, fee, change_address: options.change_address || senders[0], ...options }).then(result => { result.tx_hex = result.transaction.serialize(); delete result.transaction; resolve(result); }).catch(error => reject(error)) }) } btcOperator.createMultiSigTx = function (sender, redeemScript, receivers, amounts, fee = null, options = {}) { return new Promise((resolve, reject) => { //validate tx parameters let addr_type = validateAddress(sender); if (!(["multisig", "multisigBech32"].includes(addr_type))) return reject("Invalid sender (multisig):" + sender); else { let script = coinjs.script(); let decode = (addr_type == "multisig") ? script.decodeRedeemScript(redeemScript) : script.decodeRedeemScriptBech32(redeemScript); if (!decode || decode.address !== sender) return reject("Invalid redeem-script"); } try { ({ receivers, amounts } = validateTxParameters({ receivers, amounts, fee, change_address: options.change_address })); } catch (e) { return reject(e) } //create transaction createTransaction({ senders: [sender], redeemScripts: [redeemScript], receivers, amounts, fee, change_address: options.change_address || sender, ...options }).then(result => { result.tx_hex = result.transaction.serialize(); delete result.transaction; resolve(result); }).catch(error => reject(error)) }) } const deserializeTx = btcOperator.deserializeTx = function (tx) { if (typeof tx === 'string' || Array.isArray(tx)) { try { tx = coinjs.transaction().deserialize(tx); } catch { throw "Invalid transaction hex"; } } else if (typeof tx !== 'object' || typeof tx.sign !== 'function') throw "Invalid transaction object"; return tx; } btcOperator.signTx = function (tx, privkeys, sighashtype = 1) { tx = deserializeTx(tx); if (!Array.isArray(privkeys)) privkeys = [privkeys]; for (let i in privkeys) if (privkeys[i].length === 64) privkeys[i] = coinjs.privkey2wif(privkeys[i]); new Set(privkeys).forEach(key => tx.sign(key, sighashtype)); //Sign the tx using private key WIF return tx.serialize(); } const checkSigned = btcOperator.checkSigned = function (tx, bool = true) { tx = deserializeTx(tx); let n = []; for (let i in tx.ins) { var s = tx.extractScriptKey(i); if (s['type'] !== 'multisig' && s['type'] !== 'multisig_bech32') n.push(s.signed == 'true' || (tx.witness[i] && tx.witness[i].length == 2)) else { var rs = coinjs.script().decodeRedeemScript(s.script); //will work for bech32 too, as only address is diff let x = { s: s['signatures'], r: rs['signaturesRequired'], t: rs['pubkeys'].length }; if (x.r > x.t) throw "signaturesRequired is more than publicKeys"; else if (x.s < x.r) n.push(x); else n.push(true); } } return bool ? !(n.filter(x => x !== true).length) : n; } btcOperator.checkIfSameTx = function (tx1, tx2) { tx1 = deserializeTx(tx1); tx2 = deserializeTx(tx2); //compare input and output length if (tx1.ins.length !== tx2.ins.length || tx1.outs.length !== tx2.outs.length) return false; //compare inputs for (let i = 0; i < tx1.ins.length; i++) if (tx1.ins[i].outpoint.hash !== tx2.ins[i].outpoint.hash || tx1.ins[i].outpoint.index !== tx2.ins[i].outpoint.index) return false; //compare outputs for (let i = 0; i < tx1.outs.length; i++) if (tx1.outs[i].value !== tx2.outs[i].value || Crypto.util.bytesToHex(tx1.outs[i].script.buffer) !== Crypto.util.bytesToHex(tx2.outs[i].script.buffer)) return false; return true; } const getTxOutput = (txid, i) => new Promise((resolve, reject) => { multiApi('tx', { txid }) .then(result => resolve(result.out[i])) .catch(error => reject(error)) }); const parseTransaction = btcOperator.parseTransaction = function (tx) { return new Promise((resolve, reject) => { tx = deserializeTx(tx); let result = {}; let promises = []; //Parse Inputs for (let i = 0; i < tx.ins.length; i++) promises.push(getTxOutput(tx.ins[i].outpoint.hash, tx.ins[i].outpoint.index)); Promise.all(promises).then(inputs => { result.inputs = inputs.map(inp => Object({ address: inp.addr, value: util.Sat_to_BTC(inp.value) })); let signed = checkSigned(tx, false); result.inputs.forEach((inp, i) => inp.signed = signed[i]); //Parse Outputs result.outputs = tx.outs.map(out => { var address; switch (out.script.chunks[0]) { case 0: //bech32, multisig-bech32 address = util.encodeBech32(Crypto.util.bytesToHex(out.script.chunks[1]), coinjs.bech32.version, coinjs.bech32.hrp); break; case 169: //segwit, multisig-segwit address = util.encodeLegacy(Crypto.util.bytesToHex(out.script.chunks[1]), coinjs.multisig); break; case 118: //legacy address = util.encodeLegacy(Crypto.util.bytesToHex(out.script.chunks[2]), coinjs.pub); } return { address, value: util.Sat_to_BTC(out.value) } }); //Parse Totals result.total_input = parseFloat(result.inputs.reduce((a, inp) => a += inp.value, 0).toFixed(8)); result.total_output = parseFloat(result.outputs.reduce((a, out) => a += out.value, 0).toFixed(8)); result.fee = parseFloat((result.total_input - result.total_output).toFixed(8)); resolve(result); }).catch(error => reject(error)) }) } btcOperator.transactionID = function (tx) { tx = deserializeTx(tx); let clone = coinjs.clone(tx); clone.witness = null; let raw_bytes = Crypto.util.hexToBytes(clone.serialize()); let txid = Crypto.SHA256(Crypto.SHA256(raw_bytes, { asBytes: true }), { asBytes: true }).reverse(); return Crypto.util.bytesToHex(txid); } const getTx = btcOperator.getTx = txid => new Promise(async (resolve, reject) => { try { const result = await multiApi('tx', { txid }); resolve({ confirmations: result.confirmations, block: result.block_height, txid: result.hash, time: result.time, size: result.size, fee: util.Sat_to_BTC(result.fee), inputs: result.inputs.map(i => Object({ address: i.prev_out.addr, value: util.Sat_to_BTC(i.prev_out.value) })), total_input_value: util.Sat_to_BTC(result.inputs.reduce((a, i) => a + i.prev_out.value, 0)), outputs: result.out.map(o => Object({ address: o.addr, value: util.Sat_to_BTC(o.value) })), total_output_value: util.Sat_to_BTC(result.out.reduce((a, o) => a += o.value, 0)), }) } catch (error) { reject(error) } }).catch(error => reject(error)) getTx.hex = btcOperator.getTx.hex = txid => multiApi('txHex', { txid }); btcOperator.getAddressData = address => new Promise((resolve, reject) => { Promise.all([ multiApi('balance', { addr: address }), multiApi('txs', { addr: address }) ]).then(([balance, txs]) => { const parsedTxs = txs.map(tx => parseTx(tx, address)); resolve({ address, balance, txs: parsedTxs }); }).catch(error => reject(error)) }); btcOperator.getBlock = block => new Promise((resolve, reject) => { fetch_api(`rawblock/${block}`).then(result => resolve({ height: result.height, hash: result.hash, merkle_root: result.mrkl_root, prev_block: result.prev_block, next_block: result.next_block[0], size: result.size, time: result.time * 1000, //s to ms txs: result.tx.map(t => Object({ fee: t.fee, size: t.size, inputs: t.inputs.map(i => Object({ address: i.prev_out.addr, value: util.Sat_to_BTC(i.prev_out.value) })), total_input_value: util.Sat_to_BTC(t.inputs.reduce((a, i) => a + i.prev_out.value, 0)), outputs: t.out.map(o => Object({ address: o.addr, value: util.Sat_to_BTC(o.value) })), total_output_value: util.Sat_to_BTC(t.out.reduce((a, o) => a += o.value, 0)), })) })).catch(error => reject(error)) }); })('object' === typeof module ? module.exports : window.btcOperator = {});