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send-crypto

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A minimal JavaScript library / wallet for sending crypto assets

github.com/renproject/send-crypto

renproject/send-crypto

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"use strict"; var __importDefault = (this && this.__importDefault) || function (mod) { return (mod && mod.__esModule) ? mod : { "default": mod }; }; Object.defineProperty(exports, "__esModule", { value: true }); exports.Blockchain = exports.broadcastTransaction = exports.BlockchainNetwork = void 0; const axios_1 = __importDefault(require("axios")); const url_1 = require("url"); const utxo_1 = require("../../lib/utxo"); const timeout_1 = require("./timeout"); var BlockchainNetwork; (function (BlockchainNetwork) { BlockchainNetwork["Bitcoin"] = "btc"; BlockchainNetwork["BitcoinCash"] = "bch"; BlockchainNetwork["BitcoinTestnet"] = "btc-testnet"; BlockchainNetwork["BitcoinCashTestnet"] = "bch-testnet"; })(BlockchainNetwork = exports.BlockchainNetwork || (exports.BlockchainNetwork = {})); const fetchLatestBlock = async (network) => { const statsUrl = `https://api.blockchain.info/haskoin-store/${network}/block/best?notx=true`; const statsResponse = (await axios_1.default.get(statsUrl)).data; return statsResponse.height; }; const fetchUTXO = (network) => async (txHash, vOut) => { const url = `https://api.blockchain.info/haskoin-store/${network}/transaction/${txHash}`; const response = (await axios_1.default.get(`${url}`, { timeout: timeout_1.DEFAULT_TIMEOUT, })).data; const confirmations = !response.block || !response.block.height ? 0 : Math.max((await fetchLatestBlock(network)) - response.block.height + 1, 0); return { txHash, vOut, amount: response.outputs[vOut].value, confirmations, }; }; const fetchUTXOs = (network) => async (address, confirmations, limit = 25, offset = 0) => fetchTXs(network)(address, confirmations, limit, offset, true); const fetchTXs = (network) => async (address, confirmations = 0, limit = 25, offset = 0, onlyUnspent = false) => { const url = `https://api.blockchain.info/haskoin-store/${network}/address/${address}/transactions/full?limit=${limit}&offset=${offset}`; const response = (await axios_1.default.get(url, { timeout: timeout_1.DEFAULT_TIMEOUT, })).data; let latestBlock; const received = []; for (const tx of response) { latestBlock = latestBlock || (await fetchLatestBlock(network)); const txConfirmations = tx.block && tx.block.height ? Math.max(latestBlock - tx.block.height + 1, 0) : 0; for (let i = 0; i < tx.outputs.length; i++) { const vout = tx.outputs[i]; if (vout.address === address && // If the onlyUnspent flag is true, check that the tx is unspent. (!onlyUnspent || vout.spent === false)) { received.push({ txHash: tx.txid, amount: vout.value, vOut: i, confirmations: txConfirmations, }); } } } return received .filter((utxo) => confirmations === 0 || utxo.confirmations >= confirmations) .sort(utxo_1.sortUTXOs); }; const broadcastTransaction = (network) => async (txHex) => { if (network !== BlockchainNetwork.Bitcoin) { throw new Error(`Broadcasting ${network} transactions not supported by endpoint.`); } const url = `https://blockchain.info/pushtx`; const params = new url_1.URLSearchParams(); params.append("tx", txHex); const response = await axios_1.default.post(url, params, { timeout: timeout_1.DEFAULT_TIMEOUT, }); if (response.data.error) { throw new Error(response.data.error); } // TODO return response.data; }; exports.broadcastTransaction = broadcastTransaction; exports.Blockchain = { networks: BlockchainNetwork, fetchUTXO, fetchUTXOs, broadcastTransaction: exports.broadcastTransaction, fetchTXs, }; //# 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