forked from cerc-io/plugeth
simplifid abi.js methods
This commit is contained in:
Marek Kotewicz
parent
17f2f12ce6
commit
ed1cb9edca
131
lib/abi.js
131
lib/abi.js
@ -54,56 +54,52 @@ var padLeft = function (string, chars) {
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return new Array(chars - string.length + 1).join("0") + string;
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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 setupInputTypes = function () {
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var prefixedType = function (prefix) {
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return function (type, value) {
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var expected = prefix;
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if (type.indexOf(expected) !== 0) {
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return false;
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}
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var padding = 32; // override as per the new ABI.
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if (prefix === "string")
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return web3.fromAscii(value, padding).substr(2);
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if (typeof value === "number")
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value = value.toString(16);
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else if (typeof value === "string")
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value = web3.toHex(value);
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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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return type.indexOf(prefix) === 0;
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};
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};
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var namedType = function (name, 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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}
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var padding = 32; //override as per the new ABI.
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return padLeft(formatter ? formatter(value) : value, padding * 2);
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return type === name;
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};
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};
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var formatInt = function (value) {
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var padding = 32 * 2;
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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 if (typeof value === 'string')
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value = value.toHex(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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var formatString = function (value) {
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return web3.fromAscii(value, 32).substr(2);
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};
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var formatBool = function (value) {
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return value ? '0x1' : '0x0';
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return '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0');
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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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prefixedType('string'),
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prefixedType('real'),
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prefixedType('ureal'),
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namedType('address'),
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namedType('bool', formatBool),
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{ type: prefixedType('uint'), format: formatInt },
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{ type: prefixedType('int'), format: formatInt },
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{ type: prefixedType('hash'), format: formatInt },
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{ type: prefixedType('string'), format: formatString },
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{ type: prefixedType('real'), format: formatInt },
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{ type: prefixedType('ureal'), format: formatInt },
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{ type: namedType('address') },
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{ type: namedType('bool'), format: formatBool }
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];
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};
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@ -118,65 +114,73 @@ var toAbiInput = function (json, methodName, params) {
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}
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var method = json[index];
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var padding = 32 * 2;
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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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found = inputTypes[j](method.inputs[i].type, params[i]);
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var typeMatch = false;
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for (var j = 0; j < inputTypes.length && !typeMatch; j++) {
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typeMatch = inputTypes[j].type(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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if (!typeMatch) {
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console.error('input parser does not support type: ' + method.inputs[i].type);
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}
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bytes += found;
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var formatter = inputTypes[j - 1].format;
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bytes += (formatter ? formatter(params[i]) : params[i]);
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}
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return bytes;
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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 setupOutputTypes = function () {
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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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var expected = prefix;
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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 = 32; // override as per the new ABI.
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return padding * 2;
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return type.indexOf(expected) === 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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var padding = 32; // override as per the new ABI.
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return name === type ? padding * 2 : -1;
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return name === type;
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};
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};
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/// @returns input bytes formatted to int
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var formatInt = function (value) {
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return value.length <= 8 ? +parseInt(value, 16) : hexToDec(value);
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};
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/// @returns input bytes formatted to hex
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var formatHash = function (value) {
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return "0x" + value;
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};
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/// @returns input bytes formatted to bool
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var formatBool = function (value) {
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return value === '1' ? true : false;
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};
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/// @returns input bytes formatted to ascii string
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var formatString = function (value) {
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return web3.toAscii(value);
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};
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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: prefixedType('string'), format: formatString },
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{ padding: prefixedType('real'), format: formatInt },
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{ padding: prefixedType('ureal'), format: formatInt },
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{ padding: namedType('address') },
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{ padding: namedType('bool'), format: formatBool }
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{ type: prefixedType('uint'), format: formatInt },
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{ type: prefixedType('int'), format: formatInt },
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{ type: prefixedType('hash'), format: formatHash },
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{ type: prefixedType('string'), format: formatString },
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{ type: prefixedType('real'), format: formatInt },
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{ type: prefixedType('ureal'), format: formatInt },
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{ type: namedType('address') },
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{ type: namedType('bool'), format: formatBool }
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];
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};
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@ -193,14 +197,16 @@ var fromAbiOutput = function (json, methodName, output) {
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var result = [];
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var method = json[index];
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var padding = 32 * 2;
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for (var i = 0; i < method.outputs.length; i++) {
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var padding = -1;
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for (var j = 0; j < outputTypes.length && padding === -1; j++) {
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padding = outputTypes[j].padding(method.outputs[i].type);
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var typeMatch = false;
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for (var j = 0; j < outputTypes.length && !typeMatch; j++) {
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typeMatch = outputTypes[j].type(method.outputs[i].type);
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}
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if (padding === -1) {
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if (!typeMatch) {
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// not found output parsing
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console.error('output parser does not support type: ' + method.outputs[i].type);
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continue;
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}
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var res = output.slice(0, padding);
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@ -212,6 +218,8 @@ var fromAbiOutput = function (json, methodName, output) {
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return result;
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};
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/// @param json abi for contract
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/// @returns input parser object for given json abi
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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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@ -224,6 +232,8 @@ var inputParser = function (json) {
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return parser;
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};
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/// @param json abi for contract
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/// @returns output parser for given json abi
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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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@ -235,6 +245,9 @@ var outputParser = function (json) {
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return parser;
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};
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/// @param json abi for contract
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/// @param method name for which we want to get method signature
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/// @returns (promise) contract method signature for method with given name
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var methodSignature = function (json, name) {
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var method = json[findMethodIndex(json, name)];
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var result = name + '(';
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