Marek Kotewicz
10 years ago
13 changed files with 894 additions and 402 deletions
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@ -0,0 +1,157 @@ |
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/* |
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This file is part of ethereum.js. |
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|
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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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|
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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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|
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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 formatters.js |
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* @authors: |
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* Marek Kotewicz <marek@ethdev.com> |
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* @date 2015 |
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*/ |
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if (process.env.NODE_ENV !== 'build') { |
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var BigNumber = require('bignumber.js'); // jshint ignore:line
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} |
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// TODO: remove web3 dependency from here!
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var web3 = require('./web3'); |
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BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); |
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var ETH_PADDING = 32; |
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/// @param string string to be padded
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/// @param number of characters that result string should have
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/// @param sign, by default 0
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/// @returns right aligned string
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var padLeft = function (string, chars, sign) { |
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return new Array(chars - string.length + 1).join(sign ? sign : "0") + string; |
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}; |
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/// Formats input value to byte representation of int
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/// If value is negative, return it's two's complement
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/// If the value is floating point, round it down
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/// @returns right-aligned byte representation of int
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var formatInputInt = function (value) { |
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var padding = ETH_PADDING * 2; |
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if (value instanceof BigNumber || typeof value === 'number') { |
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if (typeof value === 'number') |
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value = new BigNumber(value); |
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value = value.round(); |
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if (value.lessThan(0)) |
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value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1); |
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value = value.toString(16); |
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} |
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else if (value.indexOf('0x') === 0) |
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value = value.substr(2); |
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else if (typeof value === 'string') |
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value = formatInputInt(new BigNumber(value)); |
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else |
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value = (+value).toString(16); |
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return padLeft(value, padding); |
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}; |
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/// Formats input value to byte representation of string
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/// @returns left-algined byte representation of string
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var formatInputString = function (value) { |
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return web3.fromAscii(value, ETH_PADDING).substr(2); |
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}; |
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/// Formats input value to byte representation of bool
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/// @returns right-aligned byte representation bool
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var formatInputBool = function (value) { |
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return '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0'); |
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}; |
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/// Formats input value to byte representation of real
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/// Values are multiplied by 2^m and encoded as integers
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/// @returns byte representation of real
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var formatInputReal = function (value) { |
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return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128))); |
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}; |
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/// Check if input value is negative
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/// @param value is hex format
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/// @returns true if it is negative, otherwise false
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var signedIsNegative = function (value) { |
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return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1'; |
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}; |
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/// Formats input right-aligned input bytes to int
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/// @returns right-aligned input bytes formatted to int
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var formatOutputInt = function (value) { |
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value = value || "0"; |
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// check if it's negative number
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// it it is, return two's complement
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if (signedIsNegative(value)) { |
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return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1); |
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} |
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return new BigNumber(value, 16); |
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}; |
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/// Formats big right-aligned input bytes to uint
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/// @returns right-aligned input bytes formatted to uint
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var formatOutputUInt = function (value) { |
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value = value || "0"; |
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return new BigNumber(value, 16); |
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}; |
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/// @returns input bytes formatted to real
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var formatOutputReal = function (value) { |
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return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128)); |
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}; |
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/// @returns input bytes formatted to ureal
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var formatOutputUReal = function (value) { |
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return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128)); |
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}; |
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/// @returns right-aligned input bytes formatted to hex
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var formatOutputHash = function (value) { |
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return "0x" + value; |
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}; |
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/// @returns right-aligned input bytes formatted to bool
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var formatOutputBool = function (value) { |
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return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false; |
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}; |
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/// @returns left-aligned input bytes formatted to ascii string
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var formatOutputString = function (value) { |
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return web3.toAscii(value); |
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}; |
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/// @returns right-aligned input bytes formatted to address
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var formatOutputAddress = function (value) { |
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return "0x" + value.slice(value.length - 40, value.length); |
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}; |
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module.exports = { |
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formatInputInt: formatInputInt, |
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formatInputString: formatInputString, |
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formatInputBool: formatInputBool, |
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formatInputReal: formatInputReal, |
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formatOutputInt: formatOutputInt, |
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formatOutputUInt: formatOutputUInt, |
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formatOutputReal: formatOutputReal, |
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formatOutputUReal: formatOutputUReal, |
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formatOutputHash: formatOutputHash, |
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formatOutputBool: formatOutputBool, |
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formatOutputString: formatOutputString, |
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formatOutputAddress: formatOutputAddress |
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}; |
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@ -0,0 +1,79 @@ |
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/* |
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This file is part of ethereum.js. |
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|
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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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|
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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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|
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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 types.js |
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* @authors: |
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* Marek Kotewicz <marek@ethdev.com> |
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* @date 2015 |
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*/ |
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var f = require('./formatters'); |
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/// @param expected type prefix (string)
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/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
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var prefixedType = function (prefix) { |
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return function (type) { |
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return type.indexOf(prefix) === 0; |
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}; |
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}; |
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/// @param expected type name (string)
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/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
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var namedType = function (name) { |
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return function (type) { |
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return name === type; |
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}; |
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}; |
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/// Setups input formatters for solidity types
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/// @returns an array of input formatters
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var inputTypes = function () { |
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return [ |
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{ type: prefixedType('uint'), format: f.formatInputInt }, |
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{ type: prefixedType('int'), format: f.formatInputInt }, |
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{ type: prefixedType('hash'), format: f.formatInputInt }, |
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{ type: prefixedType('string'), format: f.formatInputString }, |
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{ type: prefixedType('real'), format: f.formatInputReal }, |
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{ type: prefixedType('ureal'), format: f.formatInputReal }, |
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{ type: namedType('address'), format: f.formatInputInt }, |
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{ type: namedType('bool'), format: f.formatInputBool } |
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]; |
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}; |
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/// Setups output formaters for solidity types
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/// @returns an array of output formatters
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var outputTypes = function () { |
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return [ |
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{ type: prefixedType('uint'), format: f.formatOutputUInt }, |
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{ type: prefixedType('int'), format: f.formatOutputInt }, |
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{ type: prefixedType('hash'), format: f.formatOutputHash }, |
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{ type: prefixedType('string'), format: f.formatOutputString }, |
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{ type: prefixedType('real'), format: f.formatOutputReal }, |
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{ type: prefixedType('ureal'), format: f.formatOutputUReal }, |
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{ type: namedType('address'), format: f.formatOutputAddress }, |
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{ type: namedType('bool'), format: f.formatOutputBool } |
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]; |
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}; |
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module.exports = { |
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prefixedType: prefixedType, |
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namedType: namedType, |
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inputTypes: inputTypes, |
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outputTypes: outputTypes |
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}; |
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@ -0,0 +1,39 @@ |
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/* |
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This file is part of ethereum.js. |
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|
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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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|
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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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|
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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 utils.js |
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* @authors: |
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* Marek Kotewicz <marek@ethdev.com> |
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* @date 2015 |
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*/ |
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/// Finds first index of array element matching pattern
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/// @param array
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/// @param callback pattern
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/// @returns index of element
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var findIndex = function (array, callback) { |
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var end = false; |
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var i = 0; |
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for (; i < array.length && !end; i++) { |
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end = callback(array[i]); |
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} |
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return end ? i - 1 : -1; |
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}; |
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module.exports = { |
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findIndex: findIndex |
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}; |
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@ -1,22 +1,124 @@ |
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var assert = require('assert'); |
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var event = require('../lib/event.js'); |
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var f = require('../lib/formatters.js'); |
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describe('event', function () { |
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it('should create filter input object from given', function () { |
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it('should create basic filter input object', function () { |
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// given
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var address = '0x012345'; |
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var signature = '0x987654'; |
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var e = { |
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name: 'Event', |
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inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}] |
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}; |
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// when
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var impl = event(address, signature); |
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var impl = event(address, signature, e); |
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var result = impl(); |
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// then
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assert.equal(result.address, address); |
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assert.equal(result.topics.length, 1); |
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assert.equal(result.topics[0], signature); |
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assert.equal(result.topic.length, 1); |
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assert.equal(result.topic[0], signature); |
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}); |
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it('should create filter input object with options', function () { |
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// given
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var address = '0x012345'; |
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var signature = '0x987654'; |
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var options = { |
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earliest: 1, |
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latest: 2, |
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offset: 3, |
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max: 4 |
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}; |
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var e = { |
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name: 'Event', |
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inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}] |
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}; |
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// when
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var impl = event(address, signature, e); |
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var result = impl({}, options); |
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// then
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assert.equal(result.address, address); |
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assert.equal(result.topic.length, 1); |
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assert.equal(result.topic[0], signature); |
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assert.equal(result.earliest, options.earliest); |
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assert.equal(result.latest, options.latest); |
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assert.equal(result.offset, options.offset); |
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assert.equal(result.max, options.max); |
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}); |
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it('should create filter input object with indexed params', function () { |
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// given
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var address = '0x012345'; |
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var signature = '0x987654'; |
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var options = { |
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earliest: 1, |
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latest: 2, |
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offset: 3, |
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max: 4 |
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}; |
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var e = { |
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name: 'Event', |
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inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}] |
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}; |
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// when
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var impl = event(address, signature, e); |
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var result = impl({a: 4}, options); |
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// then
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assert.equal(result.address, address); |
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assert.equal(result.topic.length, 2); |
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assert.equal(result.topic[0], signature); |
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assert.equal(result.topic[1], f.formatInputInt(4)); |
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assert.equal(result.earliest, options.earliest); |
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assert.equal(result.latest, options.latest); |
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assert.equal(result.offset, options.offset); |
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assert.equal(result.max, options.max); |
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}); |
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it('should create filter input object with an array of indexed params', function () { |
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// given
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var address = '0x012345'; |
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var signature = '0x987654'; |
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var options = { |
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earliest: 1, |
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latest: 2, |
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offset: 3, |
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max: 4 |
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}; |
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var e = { |
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name: 'Event', |
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inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}] |
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}; |
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// when
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var impl = event(address, signature, e); |
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var result = impl({a: [4, 69]}, options); |
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// then
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assert.equal(result.address, address); |
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assert.equal(result.topic.length, 2); |
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assert.equal(result.topic[0], signature); |
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assert.equal(result.topic[1][0], f.formatInputInt(4)); |
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assert.equal(result.topic[1][1], f.formatInputInt(69)); |
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assert.equal(result.earliest, options.earliest); |
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assert.equal(result.latest, options.latest); |
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assert.equal(result.offset, options.offset); |
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assert.equal(result.max, options.max); |
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}); |
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}); |
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