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133 lines
3.7 KiB
133 lines
3.7 KiB
/*
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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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/**
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* @file abi.js
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* @author Marek Kotewicz <marek@ethdev.com>
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* @author Gav Wood <g@ethdev.com>
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* @date 2014
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*/
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var utils = require('../utils/utils');
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var coder = require('./coder');
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var solUtils = require('./utils');
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/**
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* Formats input params to bytes
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*
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* @method formatInput
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* @param {Array} abi inputs of method
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* @param {Array} params that will be formatted to bytes
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* @returns bytes representation of input params
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*/
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var formatInput = function (inputs, params) {
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var i = inputs.map(function (input) {
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return input.type;
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});
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return coder.encodeParams(i, params);
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};
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/**
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* Formats output bytes back to param list
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*
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* @method formatOutput
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* @param {Array} abi outputs of method
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* @param {String} bytes represention of output
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* @returns {Array} output params
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*/
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var formatOutput = function (outs, bytes) {
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var o = outs.map(function (out) {
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return out.type;
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});
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return coder.decodeParams(o, bytes);
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};
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/**
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* Should be called to create input parser for contract with given abi
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*
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* @method inputParser
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* @param {Array} contract abi
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* @returns {Object} input parser object for given json abi
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* TODO: refactor creating the parser, do not double logic from contract
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*/
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var inputParser = function (json) {
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var parser = {};
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json.forEach(function (method) {
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var displayName = utils.extractDisplayName(method.name);
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var typeName = utils.extractTypeName(method.name);
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var impl = function () {
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var params = Array.prototype.slice.call(arguments);
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return formatInput(method.inputs, params);
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};
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if (parser[displayName] === undefined) {
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parser[displayName] = impl;
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}
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parser[displayName][typeName] = impl;
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});
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return parser;
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};
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/**
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* Should be called to create output parser for contract with given abi
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*
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* @method outputParser
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* @param {Array} contract abi
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* @returns {Object} output parser for given json abi
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*/
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var outputParser = function (json) {
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var parser = {};
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json.forEach(function (method) {
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var displayName = utils.extractDisplayName(method.name);
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var typeName = utils.extractTypeName(method.name);
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var impl = function (output) {
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return formatOutput(method.outputs, output);
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};
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if (parser[displayName] === undefined) {
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parser[displayName] = impl;
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}
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parser[displayName][typeName] = impl;
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});
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return parser;
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};
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var formatConstructorParams = function (abi, params) {
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var constructor = solUtils.getConstructor(abi, params.length);
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if (!constructor) {
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if (params.length > 0) {
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console.warn("didn't found matching constructor, using default one");
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}
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return '';
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}
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return formatInput(constructor.inputs, params);
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};
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module.exports = {
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inputParser: inputParser,
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outputParser: outputParser,
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formatInput: formatInput,
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formatOutput: formatOutput,
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formatConstructorParams: formatConstructorParams
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};
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