61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
'use strict';
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var async = require('async');
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var levelup = require('levelup');
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var bitcore = require('bitcore');
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var Transaction = bitcore.Transaction;
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Transaction.prototype.populateInputs = function(db, poolTransactions, callback) {
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var self = this;
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if(this.isCoinbase()) {
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return setImmediate(callback);
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}
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async.each(
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this.inputs,
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function(input, next) {
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self._populateInput(db, input, poolTransactions, next);
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},
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callback
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);
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};
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Transaction.prototype._populateInput = function(db, input, poolTransactions, callback) {
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if (!input.prevTxId || !Buffer.isBuffer(input.prevTxId)) {
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return callback(new Error('Input is expected to have prevTxId as a buffer'));
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}
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var txid = input.prevTxId.toString('hex');
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db.getTransaction(txid, true, function(err, prevTx) {
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if(err instanceof levelup.errors.NotFoundError) {
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// Check the pool for transaction
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for(var i = 0; i < poolTransactions.length; i++) {
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if(txid === poolTransactions[i].hash) {
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input.output = poolTransactions[i].outputs[input.outputIndex];
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return callback();
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}
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}
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return callback(new Error('Previous tx ' + input.prevTxId.toString('hex') + ' not found'));
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} else if(err) {
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callback(err);
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} else {
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input.output = prevTx.outputs[input.outputIndex];
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callback();
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}
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});
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};
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Transaction.prototype._checkSpent = function(db, input, poolTransactions, callback) {
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// TODO check and see if another transaction in the pool spent the output
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db.isSpentDB(input, function(spent) {
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if(spent) {
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return callback(new Error('Input already spent'));
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} else {
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callback();
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}
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});
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};
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module.exports = Transaction;
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