74 lines
2.2 KiB
JavaScript
74 lines
2.2 KiB
JavaScript
/*
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This file is part of ethereum.js.
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ethereum.js is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ethereum.js is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file event.js
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* @authors:
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* Marek Kotewicz <marek@ethdev.com>
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* @date 2014
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*/
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var abi = require('./abi');
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var utils = require('./utils');
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var inputWithName = function (inputs, name) {
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var index = utils.findIndex(inputs, function (input) {
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return input.name === name;
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});
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if (index === -1) {
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console.error('indexed param with name ' + name + ' not found');
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return undefined;
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}
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return inputs[index];
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};
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var indexedParamsToTopics = function (event, indexed) {
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// sort keys?
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return Object.keys(indexed).map(function (key) {
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// TODO: simplify this!
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var parser = abi.inputParser([{
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name: 'test',
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inputs: [inputWithName(event.inputs, key)]
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}]);
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var value = indexed[key];
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if (value instanceof Array) {
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return value.map(function (v) {
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return parser.test(v);
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});
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}
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return parser.test(value);
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});
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};
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var implementationOfEvent = function (address, signature, event) {
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// valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch'
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return function (indexed, options) {
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var o = options || {};
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o.address = address;
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o.topic = [];
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o.topic.push(signature);
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if (indexed) {
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o.topic = o.topic.concat(indexedParamsToTopics(event, indexed));
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}
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return o;
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};
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};
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module.exports = implementationOfEvent;
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