1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | 1 1 1 6 18 1 2 2 2 2 1 3 2 2 2 1 2 1 1 4 4 4 4 4 4 3 4 1 2 2 2 7 7 3 4 7 7 1 2 2 2 2 3 2 2 2 2 2 1 1 | /* This file is part of ethereum.js. ethereum.js is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. ethereum.js is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with ethereum.js. If not, see <http://www.gnu.org/licenses/>. */ /** @file event.js * @authors: * Marek Kotewicz <marek@ethdev.com> * @date 2014 */ var abi = require('./abi'); var utils = require('./utils'); /// filter inputs array && returns only indexed (or not) inputs /// @param inputs array /// @param bool if result should be an array of indexed params on not /// @returns array of (not?) indexed params var filterInputs = function (inputs, indexed) { return inputs.filter(function (current) { return current.indexed === indexed; }); }; var inputWithName = function (inputs, name) { var index = utils.findIndex(inputs, function (input) { return input.name === name; }); Iif (index === -1) { console.error('indexed param with name ' + name + ' not found'); return undefined; } return inputs[index]; }; var indexedParamsToTopics = function (event, indexed) { // sort keys? return Object.keys(indexed).map(function (key) { var inputs = [inputWithName(filterInputs(event.inputs, true), key)]; var value = indexed[key]; if (value instanceof Array) { return value.map(function (v) { return abi.formatInput(inputs, [v]); }); } return abi.formatInput(inputs, [value]); }); }; var inputParser = function (address, signature, event) { // valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch' return function (indexed, options) { var o = options || {}; o.address = address; o.topic = []; o.topic.push(signature); if (indexed) { o.topic = o.topic.concat(indexedParamsToTopics(event, indexed)); } return o; }; }; var getArgumentsObject = function (inputs, indexed, notIndexed) { var indexedCopy = indexed.slice(); var notIndexedCopy = notIndexed.slice(); return inputs.reduce(function (acc, current) { var value; if (current.indexed) value = indexed.splice(0, 1)[0]; else value = notIndexed.splice(0, 1)[0]; acc[current.name] = value; return acc; }, {}); }; var outputParser = function (event) { return function (output) { var result = { event: utils.extractDisplayName(event.name), number: output.number, args: {} }; Iif (!output.topic) { return result; } var indexedOutputs = filterInputs(event.inputs, true); var indexedData = "0x" + output.topic.slice(1, output.topic.length).map(function (topic) { return topic.slice(2); }).join(""); var indexedRes = abi.formatOutput(indexedOutputs, indexedData); var notIndexedOutputs = filterInputs(event.inputs, false); var notIndexedRes = abi.formatOutput(notIndexedOutputs, output.data); result.args = getArgumentsObject(event.inputs, indexedRes, notIndexedRes); return result; }; }; var getMatchingEvent = function (events, payload) { for (var i = 0; i < events.length; i++) { var signature = abi.eventSignatureFromAscii(events[i].name); if (signature === payload.topic[0]) { return events[i]; } } return undefined; }; module.exports = { inputParser: inputParser, outputParser: outputParser, getMatchingEvent: getMatchingEvent }; |