81 lines
1.8 KiB
JavaScript
81 lines
1.8 KiB
JavaScript
'use strict';
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var BaseService = require('../../service');
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var inherits = require('util').inherits;
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function TransactionService(options) {
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BaseService.call(this, options);
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}
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inherits(TransactionService, BaseService);
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TransactionService.dependencies = [
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'db'
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];
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TransactionService.prototype.start = function(callback) {
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var self = this;
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this.store = this.node.services.db.store;
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this.node.services.db.getPrefix(this.name, function(err, prefix) {
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if(err) {
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return callback(err);
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}
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self.prefix = prefix;
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callback();
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});
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};
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TransactionService.prototype.stop = function(callback) {
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setImmediate(callback);
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};
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TransactionService.prototype.blockHandler = function(block, connectBlock, callback) {
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var action = 'put';
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if (!connectBlock) {
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action = 'del';
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}
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var operations = [];
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for(var i = 0; i < block.transactions.length; i++) {
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var tx = block.transactions[i];
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operations.push({
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type: action,
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key: this._encodeTransactionKey(tx.id),
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value: this._encodeTransactionValue(tx)
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});
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}
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setImmediate(function() {
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callback(null, operations);
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});
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};
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TransactionService.prototype._encodeTransactionKey = function(txid) {
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return Buffer.concat([this.prefix, new Buffer(txid, 'hex')]);
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};
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TransactionService.prototype._decodeTransactionKey = function(buffer) {
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return buffer.slice(1).toString('hex');
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};
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TransactionService.prototype._encodeTransactionValue = function(transaction, height) {
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var heightBuffer = new Buffer(4);
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heightBuffer.writeUInt32BE(height);
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return new Buffer.concat([heightBuffer, transaction.uncheckedSerialize()]);
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};
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TransactionService.prototype._decodeTransactionValue = function(buffer) {
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return {
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height: Buffer.readUInt32BE(height),
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transaction: new bitcore.Transaction(buffer)
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};
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};
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module.exports = TransactionService;
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