69 lines
2.2 KiB
TypeScript
69 lines
2.2 KiB
TypeScript
import { TransactionExtended, TransactionMinerInfo } from '../mempool.interfaces';
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import { IEsploraApi } from './bitcoin/esplora-api.interface';
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import { Common } from './common';
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import bitcoinApi, { bitcoinCoreApi } from './bitcoin/bitcoin-api-factory';
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class TransactionUtils {
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constructor() { }
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public stripCoinbaseTransaction(tx: TransactionExtended): TransactionMinerInfo {
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return {
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vin: [{
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scriptsig: tx.vin[0].scriptsig || tx.vin[0]['coinbase']
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}],
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vout: tx.vout
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.map((vout) => ({
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scriptpubkey_address: vout.scriptpubkey_address,
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scriptpubkey_asm: vout.scriptpubkey_asm,
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value: vout.value
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}))
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.filter((vout) => vout.value)
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};
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}
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/**
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* @param txId
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* @param addPrevouts
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* @param lazyPrevouts
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* @param forceCore - See https://github.com/mempool/mempool/issues/2904
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*/
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public async $getTransactionExtended(txId: string, addPrevouts = false, lazyPrevouts = false, forceCore = false): Promise<TransactionExtended> {
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let transaction: IEsploraApi.Transaction;
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if (forceCore === true) {
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transaction = await bitcoinCoreApi.$getRawTransaction(txId, true);
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} else {
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transaction = await bitcoinApi.$getRawTransaction(txId, false, addPrevouts, lazyPrevouts);
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}
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return this.extendTransaction(transaction);
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}
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private extendTransaction(transaction: IEsploraApi.Transaction): TransactionExtended {
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// @ts-ignore
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if (transaction.vsize) {
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// @ts-ignore
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return transaction;
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}
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const feePerVbytes = Math.max(Common.isLiquid() ? 0.1 : 1,
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(transaction.fee || 0) / (transaction.weight / 4));
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const transactionExtended: TransactionExtended = Object.assign({
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vsize: Math.round(transaction.weight / 4),
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feePerVsize: feePerVbytes,
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effectiveFeePerVsize: feePerVbytes,
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}, transaction);
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if (!transaction.status.confirmed) {
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transactionExtended.firstSeen = Math.round((new Date().getTime() / 1000));
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}
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return transactionExtended;
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}
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public hex2ascii(hex: string) {
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let str = '';
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for (let i = 0; i < hex.length; i += 2) {
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str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
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}
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return str;
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}
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}
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export default new TransactionUtils();
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