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@ -17,9 +17,19 @@ |
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/** @file abi.js |
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* @authors: |
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* Marek Kotewicz <marek@ethdev.com> |
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* Gav Wood <g@ethdev.com> |
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* @date 2014 |
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*/ |
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// TODO: make these be actually accurate instead of falling back onto JS's doubles.
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var hexToDec = function (hex) { |
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return parseInt(hex, 16).toString(); |
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}; |
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var decToHex = function (dec) { |
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return parseInt(dec).toString(16); |
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}; |
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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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@ -35,8 +45,8 @@ var findMethodIndex = function (json, methodName) { |
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}); |
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}; |
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var padLeft = function (number, n) { |
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return (new Array(n * 2 - number.toString().length + 1)).join("0") + number; |
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var padLeft = function (string, chars) { |
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return Array(chars - string.length + 1).join("0") + string; |
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}; |
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var setupInputTypes = function () { |
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@ -48,27 +58,34 @@ var setupInputTypes = function () { |
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} |
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var padding = parseInt(type.slice(expected.length)) / 8; |
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return padLeft(value, padding); |
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if (typeof value === "number") |
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value = value.toString(16); |
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else if (value.indexOf('0x') === 0) |
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value = value.substr(2); |
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else |
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value = (+value).toString(16); |
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return padLeft(value, padding * 2); |
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}; |
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}; |
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var namedType = function (name, padding, formatter) { |
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return function (type, value) { |
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if (type !== name) { |
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return false;
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return false; |
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} |
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return padLeft(formatter ? value : formatter(value), padding); |
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return padLeft(formatter ? formatter(value) : value, padding * 2); |
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}; |
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}; |
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var formatBool = function (value) { |
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return value ? '1' : '0'; |
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return value ? '0x1' : '0x0'; |
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}; |
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return [ |
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prefixedType('uint'), |
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prefixedType('int'), |
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prefixedType('hash'), |
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namedType('address', 20), |
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namedType('bool', 1, formatBool), |
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]; |
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@ -79,21 +96,18 @@ var inputTypes = setupInputTypes(); |
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var toAbiInput = function (json, methodName, params) { |
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var bytes = ""; |
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var index = findMethodIndex(json, methodName); |
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if (index === -1) { |
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return; |
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} |
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// it needs to be checked in WebThreeStubServer
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// something wrong might be with this additional zero
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bytes = bytes + index + 'x' + '0'; |
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bytes = "0x" + padLeft(index.toString(16), 2); |
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var method = json[index]; |
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for (var i = 0; i < method.inputs.length; i++) { |
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var found = false; |
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for (var j = 0; j < inputTypes.length && !found; j++) { |
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var val = parseInt(params[i]).toString(16); |
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found = inputTypes[j](method.inputs[i].type, val); |
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found = inputTypes[j](method.inputs[i].type, params[i]); |
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} |
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if (!found) { |
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console.error('unsupported json type: ' + method.inputs[i].type); |
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@ -110,7 +124,7 @@ var setupOutputTypes = function () { |
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if (type.indexOf(expected) !== 0) { |
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return -1; |
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} |
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var padding = parseInt(type.slice(expected.length)) / 8; |
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return padding * 2; |
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}; |
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@ -118,12 +132,16 @@ var setupOutputTypes = function () { |
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var namedType = function (name, padding) { |
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return function (type) { |
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return name === type ? padding * 2: -1; |
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return name === type ? padding * 2 : -1; |
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}; |
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}; |
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var formatInt = function (value) { |
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return parseInt(value, 16); |
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return value.length <= 8 ? +parseInt(value, 16) : hexToDec(value); |
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}; |
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var formatHash = function (value) { |
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return "0x" + value; |
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}; |
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var formatBool = function (value) { |
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@ -133,6 +151,7 @@ var setupOutputTypes = function () { |
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return [ |
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{ padding: prefixedType('uint'), format: formatInt }, |
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{ padding: prefixedType('int'), format: formatInt }, |
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{ padding: prefixedType('hash'), format: formatHash }, |
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{ padding: namedType('address', 20) }, |
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{ padding: namedType('bool', 1), format: formatBool } |
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]; |
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@ -146,7 +165,7 @@ var fromAbiOutput = function (json, methodName, output) { |
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if (index === -1) { |
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return; |
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} |
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output = output.slice(2); |
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var result = []; |
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@ -163,7 +182,7 @@ var fromAbiOutput = function (json, methodName, output) { |
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} |
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var res = output.slice(0, padding); |
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var formatter = outputTypes[j - 1].format; |
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result.push(formatter ? formatter(res): res); |
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result.push(formatter ? formatter(res) : ("0x" + res)); |
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output = output.slice(padding); |
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} |
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@ -197,4 +216,3 @@ module.exports = { |
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inputParser: inputParser, |
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outputParser: outputParser |
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}; |
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