diff options
Diffstat (limited to 'cmd/mist/assets/ext/lib/abi.js')
-rw-r--r-- | cmd/mist/assets/ext/lib/abi.js | 410 |
1 files changed, 0 insertions, 410 deletions
diff --git a/cmd/mist/assets/ext/lib/abi.js b/cmd/mist/assets/ext/lib/abi.js deleted file mode 100644 index ba47dca73..000000000 --- a/cmd/mist/assets/ext/lib/abi.js +++ /dev/null @@ -1,410 +0,0 @@ -/* - 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 abi.js - * @authors: - * Marek Kotewicz <marek@ethdev.com> - * Gav Wood <g@ethdev.com> - * @date 2014 - */ - -// TODO: is these line is supposed to be here? -if (process.env.NODE_ENV !== 'build') { - var BigNumber = require('bignumber.js'); // jshint ignore:line -} - -var web3 = require('./web3'); // jshint ignore:line - -BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); - -var ETH_PADDING = 32; - -/// method signature length in bytes -var ETH_METHOD_SIGNATURE_LENGTH = 4; - -/// Finds first index of array element matching pattern -/// @param array -/// @param callback pattern -/// @returns index of element -var findIndex = function (array, callback) { - var end = false; - var i = 0; - for (; i < array.length && !end; i++) { - end = callback(array[i]); - } - return end ? i - 1 : -1; -}; - -/// @returns a function that is used as a pattern for 'findIndex' -var findMethodIndex = function (json, methodName) { - return findIndex(json, function (method) { - return method.name === methodName; - }); -}; - -/// @returns method with given method name -var getMethodWithName = function (json, methodName) { - var index = findMethodIndex(json, methodName); - if (index === -1) { - console.error('method ' + methodName + ' not found in the abi'); - return undefined; - } - return json[index]; -}; - -/// @param string string to be padded -/// @param number of characters that result string should have -/// @param sign, by default 0 -/// @returns right aligned string -var padLeft = function (string, chars, sign) { - return new Array(chars - string.length + 1).join(sign ? sign : "0") + string; -}; - -/// @param expected type prefix (string) -/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false -var prefixedType = function (prefix) { - return function (type) { - return type.indexOf(prefix) === 0; - }; -}; - -/// @param expected type name (string) -/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false -var namedType = function (name) { - return function (type) { - return name === type; - }; -}; - -var arrayType = function (type) { - return type.slice(-2) === '[]'; -}; - -/// Formats input value to byte representation of int -/// If value is negative, return it's two's complement -/// If the value is floating point, round it down -/// @returns right-aligned byte representation of int -var formatInputInt = function (value) { - var padding = ETH_PADDING * 2; - if (value instanceof BigNumber || typeof value === 'number') { - if (typeof value === 'number') - value = new BigNumber(value); - value = value.round(); - - if (value.lessThan(0)) - value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1); - value = value.toString(16); - } - else if (value.indexOf('0x') === 0) - value = value.substr(2); - else if (typeof value === 'string') - value = formatInputInt(new BigNumber(value)); - else - value = (+value).toString(16); - return padLeft(value, padding); -}; - -/// Formats input value to byte representation of string -/// @returns left-algined byte representation of string -var formatInputString = function (value) { - return web3.fromAscii(value, ETH_PADDING).substr(2); -}; - -/// Formats input value to byte representation of bool -/// @returns right-aligned byte representation bool -var formatInputBool = function (value) { - return '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0'); -}; - -/// Formats input value to byte representation of real -/// Values are multiplied by 2^m and encoded as integers -/// @returns byte representation of real -var formatInputReal = function (value) { - return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128))); -}; - -var dynamicTypeBytes = function (type, value) { - // TODO: decide what to do with array of strings - if (arrayType(type) || type === 'string') // only string itself that is dynamic; stringX is static length. - return formatInputInt(value.length); - return ""; -}; - -/// Setups input formatters for solidity types -/// @returns an array of input formatters -var setupInputTypes = function () { - - return [ - { type: prefixedType('uint'), format: formatInputInt }, - { type: prefixedType('int'), format: formatInputInt }, - { type: prefixedType('hash'), format: formatInputInt }, - { type: prefixedType('string'), format: formatInputString }, - { type: prefixedType('real'), format: formatInputReal }, - { type: prefixedType('ureal'), format: formatInputReal }, - { type: namedType('address'), format: formatInputInt }, - { type: namedType('bool'), format: formatInputBool } - ]; -}; - -var inputTypes = setupInputTypes(); - -/// Formats input params to bytes -/// @param contract json abi -/// @param name of the method that we want to use -/// @param array of params that will be formatted to bytes -/// @returns bytes representation of input params -var toAbiInput = function (json, methodName, params) { - var bytes = ""; - - var method = getMethodWithName(json, methodName); - var padding = ETH_PADDING * 2; - - /// first we iterate in search for dynamic - method.inputs.forEach(function (input, index) { - bytes += dynamicTypeBytes(input.type, params[index]); - }); - - method.inputs.forEach(function (input, i) { - var typeMatch = false; - for (var j = 0; j < inputTypes.length && !typeMatch; j++) { - typeMatch = inputTypes[j].type(method.inputs[i].type, params[i]); - } - if (!typeMatch) { - console.error('input parser does not support type: ' + method.inputs[i].type); - } - - var formatter = inputTypes[j - 1].format; - var toAppend = ""; - - if (arrayType(method.inputs[i].type)) - toAppend = params[i].reduce(function (acc, curr) { - return acc + formatter(curr); - }, ""); - else - toAppend = formatter(params[i]); - - bytes += toAppend; - }); - return bytes; -}; - -/// Check if input value is negative -/// @param value is hex format -/// @returns true if it is negative, otherwise false -var signedIsNegative = function (value) { - return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1'; -}; - -/// Formats input right-aligned input bytes to int -/// @returns right-aligned input bytes formatted to int -var formatOutputInt = function (value) { - value = value || "0"; - // check if it's negative number - // it it is, return two's complement - if (signedIsNegative(value)) { - return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1); - } - return new BigNumber(value, 16); -}; - -/// Formats big right-aligned input bytes to uint -/// @returns right-aligned input bytes formatted to uint -var formatOutputUInt = function (value) { - value = value || "0"; - return new BigNumber(value, 16); -}; - -/// @returns input bytes formatted to real -var formatOutputReal = function (value) { - return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128)); -}; - -/// @returns input bytes formatted to ureal -var formatOutputUReal = function (value) { - return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128)); -}; - -/// @returns right-aligned input bytes formatted to hex -var formatOutputHash = function (value) { - return "0x" + value; -}; - -/// @returns right-aligned input bytes formatted to bool -var formatOutputBool = function (value) { - return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false; -}; - -/// @returns left-aligned input bytes formatted to ascii string -var formatOutputString = function (value) { - return web3.toAscii(value); -}; - -/// @returns right-aligned input bytes formatted to address -var formatOutputAddress = function (value) { - return "0x" + value.slice(value.length - 40, value.length); -}; - -var dynamicBytesLength = function (type) { - if (arrayType(type) || type === 'string') // only string itself that is dynamic; stringX is static length. - return ETH_PADDING * 2; - return 0; -}; - -/// Setups output formaters for solidity types -/// @returns an array of output formatters -var setupOutputTypes = function () { - - return [ - { type: prefixedType('uint'), format: formatOutputUInt }, - { type: prefixedType('int'), format: formatOutputInt }, - { type: prefixedType('hash'), format: formatOutputHash }, - { type: prefixedType('string'), format: formatOutputString }, - { type: prefixedType('real'), format: formatOutputReal }, - { type: prefixedType('ureal'), format: formatOutputUReal }, - { type: namedType('address'), format: formatOutputAddress }, - { type: namedType('bool'), format: formatOutputBool } - ]; -}; - -var outputTypes = setupOutputTypes(); - -/// Formats output bytes back to param list -/// @param contract json abi -/// @param name of the method that we want to use -/// @param bytes representtion of output -/// @returns array of output params -var fromAbiOutput = function (json, methodName, output) { - - output = output.slice(2); - var result = []; - var method = getMethodWithName(json, methodName); - var padding = ETH_PADDING * 2; - - var dynamicPartLength = method.outputs.reduce(function (acc, curr) { - return acc + dynamicBytesLength(curr.type); - }, 0); - - var dynamicPart = output.slice(0, dynamicPartLength); - output = output.slice(dynamicPartLength); - - method.outputs.forEach(function (out, i) { - var typeMatch = false; - for (var j = 0; j < outputTypes.length && !typeMatch; j++) { - typeMatch = outputTypes[j].type(method.outputs[i].type); - } - - if (!typeMatch) { - console.error('output parser does not support type: ' + method.outputs[i].type); - } - - var formatter = outputTypes[j - 1].format; - if (arrayType(method.outputs[i].type)) { - var size = formatOutputUInt(dynamicPart.slice(0, padding)); - dynamicPart = dynamicPart.slice(padding); - var array = []; - for (var k = 0; k < size; k++) { - array.push(formatter(output.slice(0, padding))); - output = output.slice(padding); - } - result.push(array); - } - else if (prefixedType('string')(method.outputs[i].type)) { - dynamicPart = dynamicPart.slice(padding); - result.push(formatter(output.slice(0, padding))); - output = output.slice(padding); - } else { - result.push(formatter(output.slice(0, padding))); - output = output.slice(padding); - } - }); - - return result; -}; - -/// @returns display name for method eg. multiply(uint256) -> multiply -var methodDisplayName = function (method) { - var length = method.indexOf('('); - return length !== -1 ? method.substr(0, length) : method; -}; - -/// @returns overloaded part of method's name -var methodTypeName = function (method) { - /// TODO: make it not vulnerable - var length = method.indexOf('('); - return length !== -1 ? method.substr(length + 1, method.length - 1 - (length + 1)) : ""; -}; - -/// @param json abi for contract -/// @returns input parser object for given json abi -var inputParser = function (json) { - var parser = {}; - json.forEach(function (method) { - var displayName = methodDisplayName(method.name); - var typeName = methodTypeName(method.name); - - var impl = function () { - var params = Array.prototype.slice.call(arguments); - return toAbiInput(json, method.name, params); - }; - - if (parser[displayName] === undefined) { - parser[displayName] = impl; - } - - parser[displayName][typeName] = impl; - }); - - return parser; -}; - -/// @param json abi for contract -/// @returns output parser for given json abi -var outputParser = function (json) { - var parser = {}; - json.forEach(function (method) { - - var displayName = methodDisplayName(method.name); - var typeName = methodTypeName(method.name); - - var impl = function (output) { - return fromAbiOutput(json, method.name, output); - }; - - if (parser[displayName] === undefined) { - parser[displayName] = impl; - } - - parser[displayName][typeName] = impl; - }); - - return parser; -}; - -/// @param method name for which we want to get method signature -/// @returns (promise) contract method signature for method with given name -var methodSignature = function (name) { - return web3.sha3(web3.fromAscii(name)).slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2); -}; - -module.exports = { - inputParser: inputParser, - outputParser: outputParser, - methodSignature: methodSignature, - methodDisplayName: methodDisplayName, - methodTypeName: methodTypeName, - getMethodWithName: getMethodWithName -}; - |