machankura/mempool
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Adding optional Blockstream esplora backend support.

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This commit is contained in:
Simon Lindh
2019-10-22 17:09:07 +08:00
parent 64e97b6f1f
commit afb3ecc57d
12 changed files with 1361 additions and 33 deletions
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50
backend/src/api/mempool.ts
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@@ -1,5 +1,5 @@
const config = require('../../mempool-config.json');
import bitcoinApi from './bitcoin-api-wrapper';
import bitcoinApi from './bitcoin/bitcoin-api-factory';
import { ITransaction, IMempoolInfo, IMempool } from '../interfaces';
class Mempool {
@@ -52,32 +52,40 @@ class Mempool {
public async getRawTransaction(txId: string, isCoinbase = false): Promise<ITransaction | false> {
try {
const transaction = await bitcoinApi.getRawTransaction(txId);
let totalIn = 0;
if (!isCoinbase) {
for (let i = 0; i < transaction.vin.length; i++) {
try {
const result = await bitcoinApi.getRawTransaction(transaction.vin[i].txid);
transaction.vin[i]['value'] = result.vout[transaction.vin[i].vout].value;
totalIn += result.vout[transaction.vin[i].vout].value;
} catch (err) {
console.log('Locating historical tx error');
}
}
}
let totalOut = 0;
transaction.vout.forEach((output) => totalOut += output.value);
if (totalIn > totalOut) {
transaction.fee = parseFloat((totalIn - totalOut).toFixed(8));
if (config.BACKEND_API === 'esplora') {
transaction.feePerWeightUnit = (transaction.fee * 100000000) / (transaction.vsize * 4) || 0;
transaction.feePerVsize = (transaction.fee * 100000000) / (transaction.vsize) || 0;
} else if (!isCoinbase) {
transaction.fee = 0;
transaction.feePerVsize = 0;
transaction.feePerWeightUnit = 0;
console.log('Minus fee error!');
transaction.totalOut = totalOut / 100000000;
} else {
let totalIn = 0;
if (!isCoinbase) {
for (let i = 0; i < transaction.vin.length; i++) {
try {
const result = await bitcoinApi.getRawTransaction(transaction.vin[i].txid);
transaction.vin[i]['value'] = result.vout[transaction.vin[i].vout].value;
totalIn += result.vout[transaction.vin[i].vout].value;
} catch (err) {
console.log('Locating historical tx error');
}
}
}
if (totalIn > totalOut) {
transaction.fee = parseFloat((totalIn - totalOut).toFixed(8));
transaction.feePerWeightUnit = (transaction.fee * 100000000) / (transaction.vsize * 4) || 0;
transaction.feePerVsize = (transaction.fee * 100000000) / (transaction.vsize) || 0;
} else if (!isCoinbase) {
transaction.fee = 0;
transaction.feePerVsize = 0;
transaction.feePerWeightUnit = 0;
console.log('Minus fee error!');
}
transaction.totalOut = totalOut;
}
transaction.totalOut = totalOut;
return transaction;
} catch (e) {
console.log(txId + ' not found');