993 lines
29 KiB
JavaScript
993 lines
29 KiB
JavaScript
'use strict';
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// See: https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI
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var utils = (function() {
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var convert = require('../utils/convert.js');
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var utf8 = require('../utils/utf8.js');
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return {
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defineProperty: require('../utils/properties.js').defineProperty,
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arrayify: convert.arrayify,
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padZeros: convert.padZeros,
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bigNumberify: require('../utils/bignumber.js').bigNumberify,
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getAddress: require('../utils/address').getAddress,
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concat: convert.concat,
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toUtf8Bytes: utf8.toUtf8Bytes,
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toUtf8String: utf8.toUtf8String,
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hexlify: convert.hexlify,
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};
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})();
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var errors = require('./errors');
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var paramTypeBytes = new RegExp(/^bytes([0-9]*)$/);
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var paramTypeNumber = new RegExp(/^(u?int)([0-9]*)$/);
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var paramTypeArray = new RegExp(/^(.*)\[([0-9]*)\]$/);
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var defaultCoerceFunc = function(type, value) {
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var match = type.match(paramTypeNumber)
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if (match && parseInt(match[2]) <= 48) { return value.toNumber(); }
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return value;
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}
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///////////////////////////////////
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// Parsing for Solidity Signatures
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var regexParen = new RegExp("^([^)(]*)\\((.*)\\)([^)(]*)$");
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var regexIdentifier = new RegExp("^[A-Za-z_][A-Za-z0-9_]*$");
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var close = { "(": ")", "[": "]" };
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function verifyType(type) {
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// These need to be transformed to their full description
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if (type.match(/^uint($|[^1-9])/)) {
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type = 'uint256' + type.substring(4);
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} else if (type.match(/^int($|[^1-9])/)) {
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type = 'int256' + type.substring(3);
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}
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return type;
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}
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function parseParam(param, allowIndexed) {
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function throwError(i) {
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throw new Error('unexpected character "' + param[i] + '" at position ' + i + ' in "' + param + '"');
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}
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var parent = { type: '', name: '', state: { allowType: true } };
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var node = parent;
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for (var i = 0; i < param.length; i++) {
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var c = param[i];
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switch (c) {
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case '(':
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if (!node.state.allowParams) { throwError(i); }
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delete node.state.allowType;
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node.type = verifyType(node.type);
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node.components = [ { type: '', name: '', parent: node, state: { allowType: true } } ];
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node = node.components[0];
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break;
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case ')':
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delete node.state;
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node.type = verifyType(node.type);
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var child = node;
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node = node.parent;
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if (!node) { throwError(i); }
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delete child.parent;
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delete node.state.allowParams;
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node.state.allowName = true;
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node.state.allowArray = true;
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break;
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case ',':
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delete node.state;
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node.type = verifyType(node.type);
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var sibling = { type: '', name: '', parent: node.parent, state: { allowType: true } };
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node.parent.components.push(sibling);
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delete node.parent;
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node = sibling;
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break;
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// Hit a space...
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case ' ':
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// If reading type, the type is done and may read a param or name
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if (node.state.allowType) {
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if (node.type !== '') {
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node.type = verifyType(node.type);
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delete node.state.allowType;
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node.state.allowName = true;
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node.state.allowParams = true;
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}
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}
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// If reading name, the name is done
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if (node.state.allowName) {
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if (node.name !== '') {
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if (allowIndexed && node.name === 'indexed') {
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node.indexed = true;
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node.name = '';
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} else {
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delete node.state.allowName;
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}
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}
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}
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break;
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case '[':
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if (!node.state.allowArray) { throwError(i); }
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//if (!node.array) { node.array = ''; }
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//node.array += c;
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node.type += c;
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delete node.state.allowArray;
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delete node.state.allowName;
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node.state.readArray = true;
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break;
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case ']':
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if (!node.state.readArray) { throwError(i); }
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//node.array += c;
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node.type += c;
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delete node.state.readArray;
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node.state.allowArray = true;
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node.state.allowName = true;
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break;
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default:
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if (node.state.allowType) {
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node.type += c;
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node.state.allowParams = true;
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node.state.allowArray = true;
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} else if (node.state.allowName) {
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node.name += c;
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delete node.state.allowArray;
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} else if (node.state.readArray) {
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//node.array += c;
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node.type += c;
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} else {
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throwError(i);
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}
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}
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}
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if (node.parent) { throw new Error("unexpected eof"); }
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delete parent.state;
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parent.type = verifyType(parent.type);
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//verifyType(parent);
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return parent;
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}
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function parseSignatureEvent(fragment) {
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var abi = {
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anonymous: false,
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inputs: [],
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type: 'event'
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}
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var match = fragment.match(regexParen);
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if (!match) { throw new Error('invalid event: ' + fragment); }
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abi.name = match[1].trim();
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splitNesting(match[2]).forEach(function(param) {
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param = parseParam(param, true);
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param.indexed = !!param.indexed;
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abi.inputs.push(param);
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});
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match[3].split(' ').forEach(function(modifier) {
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switch(modifier) {
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case 'anonymous':
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abi.anonymous = true;
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break;
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case '':
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break;
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default:
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console.log('unknown modifier: ' + mdifier);
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}
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});
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if (abi.name && !abi.name.match(regexIdentifier)) {
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throw new Error('invalid identifier: "' + result.name + '"');
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}
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return abi;
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}
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function parseSignatureFunction(fragment) {
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var abi = {
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constant: false,
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inputs: [],
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outputs: [],
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payable: false,
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type: 'function'
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};
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var comps = fragment.split(' returns ');
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var left = comps[0].match(regexParen);
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if (!left) { throw new Error('invalid signature'); }
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abi.name = left[1].trim();
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if (!abi.name.match(regexIdentifier)) {
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throw new Error('invalid identifier: "' + left[1] + '"');
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}
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splitNesting(left[2]).forEach(function(param) {
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abi.inputs.push(parseParam(param));
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});
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left[3].split(' ').forEach(function(modifier) {
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switch (modifier) {
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case 'constant':
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abi.constant = true;
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break;
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case 'payable':
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abi.payable = true;
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break;
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case 'pure':
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abi.constant = true;
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abi.stateMutability = 'pure';
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break;
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case 'view':
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abi.constant = true;
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abi.stateMutability = 'view';
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break;
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case '':
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break;
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default:
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console.log('unknown modifier: ' + modifier);
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}
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});
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// We have outputs
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if (comps.length > 1) {
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var right = comps[1].match(regexParen);
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if (right[1].trim() != '' || right[3].trim() != '') {
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throw new Error('unexpected tokens');
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}
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splitNesting(right[2]).forEach(function(param) {
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abi.outputs.push(parseParam(param));
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});
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}
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return abi;
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}
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function parseSignature(fragment) {
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if(typeof(fragment) === 'string') {
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// Make sure the "returns" is surrounded by a space and all whitespace is exactly one space
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fragment = fragment.replace(/\(/g, ' (').replace(/\)/g, ') ').replace(/\s+/g, ' ');
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fragment = fragment.trim();
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if (fragment.substring(0, 6) === 'event ') {
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return parseSignatureEvent(fragment.substring(6).trim());
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} else {
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if (fragment.substring(0, 9) === 'function ') {
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fragment = fragment.substring(9);
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}
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return parseSignatureFunction(fragment.trim());
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}
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}
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throw new Error('unknown fragment');
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}
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///////////////////////////////////
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// Coders
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var coderNull = function(coerceFunc) {
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return {
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name: 'null',
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type: '',
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encode: function(value) {
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return utils.arrayify([]);
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},
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decode: function(data, offset) {
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if (offset > data.length) { throw new Error('invalid null'); }
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return {
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consumed: 0,
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value: coerceFunc('null', undefined)
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}
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},
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dynamic: false
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};
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}
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var coderNumber = function(coerceFunc, size, signed, localName) {
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var name = ((signed ? 'int': 'uint') + (size * 8));
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return {
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localName: localName,
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name: name,
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type: name,
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encode: function(value) {
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try {
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value = utils.bigNumberify(value)
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} catch (error) {
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errors.throwError('invalid number value', errors.INVALID_ARGUMENT, {
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arg: localName,
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type: typeof(value),
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value: value
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});
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}
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value = value.toTwos(size * 8).maskn(size * 8);
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//value = value.toTwos(size * 8).maskn(size * 8);
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if (signed) {
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value = value.fromTwos(size * 8).toTwos(256);
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}
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return utils.padZeros(utils.arrayify(value), 32);
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},
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decode: function(data, offset) {
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if (data.length < offset + 32) {
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errors.throwError('insufficient data for ' + name + ' type', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: name,
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value: utils.hexlify(data.slice(offset, offset + 32))
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});
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}
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var junkLength = 32 - size;
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var value = utils.bigNumberify(data.slice(offset + junkLength, offset + 32));
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if (signed) {
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value = value.fromTwos(size * 8);
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} else {
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value = value.maskn(size * 8);
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}
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//if (size <= 6) { value = value.toNumber(); }
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return {
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consumed: 32,
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value: coerceFunc(name, value),
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}
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}
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};
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}
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var uint256Coder = coderNumber(function(type, value) { return value; }, 32, false);
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var coderBoolean = function(coerceFunc, localName) {
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return {
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localName: localName,
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name: 'bool',
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type: 'bool',
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encode: function(value) {
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return uint256Coder.encode(!!value ? 1: 0);
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},
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decode: function(data, offset) {
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try {
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var result = uint256Coder.decode(data, offset);
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} catch (error) {
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if (error.reason === 'insufficient data for uint256 type') {
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errors.throwError('insufficient data for boolean type', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: 'boolean',
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value: error.value
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});
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}
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throw error;
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}
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return {
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consumed: result.consumed,
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value: coerceFunc('boolean', !result.value.isZero())
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}
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}
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}
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}
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var coderFixedBytes = function(coerceFunc, length, localName) {
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var name = ('bytes' + length);
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return {
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localName: localName,
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name: name,
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type: name,
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encode: function(value) {
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try {
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value = utils.arrayify(value);
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} catch (error) {
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errors.throwError('invalid ' + name + ' value', errors.INVALID_ARGUMENT, {
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arg: localName,
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type: typeof(value),
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value: error.value
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});
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}
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if (length === 32) { return value; }
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var result = new Uint8Array(32);
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result.set(value);
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return result;
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},
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decode: function(data, offset) {
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if (data.length < offset + 32) {
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errors.throwError('insufficient data for ' + name + ' type', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: name,
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value: utils.hexlify(data.slice(offset, offset + 32))
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});
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}
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return {
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consumed: 32,
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value: coerceFunc(name, utils.hexlify(data.slice(offset, offset + length)))
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}
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}
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};
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}
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var coderAddress = function(coerceFunc, localName) {
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return {
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localName: localName,
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name: 'address',
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type: 'address',
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encode: function(value) {
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try {
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value = utils.arrayify(utils.getAddress(value));
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} catch (error) {
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errors.throwError('invalid address', errors.INVALID_ARGUMENT, {
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arg: localName,
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type: typeof(value),
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value: value
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});
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}
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var result = new Uint8Array(32);
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result.set(value, 12);
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return result;
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},
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decode: function(data, offset) {
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if (data.length < offset + 32) {
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errors.throwError('insufficuent data for address type', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: 'address',
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value: utils.hexlify(data.slice(offset, offset + 32))
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});
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}
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return {
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consumed: 32,
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value: coerceFunc('address', utils.getAddress(utils.hexlify(data.slice(offset + 12, offset + 32))))
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}
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}
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}
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}
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function _encodeDynamicBytes(value) {
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var dataLength = parseInt(32 * Math.ceil(value.length / 32));
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var padding = new Uint8Array(dataLength - value.length);
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return utils.concat([
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uint256Coder.encode(value.length),
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value,
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padding
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]);
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}
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function _decodeDynamicBytes(data, offset, localName) {
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if (data.length < offset + 32) {
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errors.throwError('insufficient data for dynamicBytes length', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: 'dynamicBytes',
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value: utils.hexlify(data.slice(offset, offset + 32))
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});
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}
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var length = uint256Coder.decode(data, offset).value;
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try {
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length = length.toNumber();
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} catch (error) {
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errors.throwError('dynamic bytes count too large', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: 'dynamicBytes',
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value: length.toString()
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});
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}
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if (data.length < offset + 32 + length) {
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errors.throwError('insufficient data for dynamicBytes type', errors.INVALID_ARGUMENT, {
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arg: localName,
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coderType: 'dynamicBytes',
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value: utils.hexlify(data.slice(offset, offset + 32 + length))
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});
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}
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return {
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consumed: parseInt(32 + 32 * Math.ceil(length / 32)),
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value: data.slice(offset + 32, offset + 32 + length),
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}
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}
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var coderDynamicBytes = function(coerceFunc, localName) {
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return {
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localName: localName,
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name: 'bytes',
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type: 'bytes',
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encode: function(value) {
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try {
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value = utils.arrayify(value);
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} catch (error) {
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errors.throwError('invalid bytes value', errors.INVALID_ARGUMENT, {
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arg: localName,
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type: typeof(value),
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value: error.value
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});
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}
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return _encodeDynamicBytes(value);
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},
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decode: function(data, offset) {
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var result = _decodeDynamicBytes(data, offset, localName);
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result.value = coerceFunc('bytes', utils.hexlify(result.value));
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return result;
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},
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dynamic: true
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};
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}
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var coderString = function(coerceFunc, localName) {
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return {
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localName: localName,
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name: 'string',
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type: 'string',
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encode: function(value) {
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if (typeof(value) !== 'string') {
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errors.throwError('invalid string value', errors.INVALID_ARGUMENT, {
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arg: localName,
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type: typeof(value),
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value: value
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});
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}
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return _encodeDynamicBytes(utils.toUtf8Bytes(value));
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},
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decode: function(data, offset) {
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var result = _decodeDynamicBytes(data, offset, localName);
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result.value = coerceFunc('string', utils.toUtf8String(result.value));
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return result;
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},
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dynamic: true
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};
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}
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function alignSize(size) {
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return parseInt(32 * Math.ceil(size / 32));
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}
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function pack(coders, values) {
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if (Array.isArray(values)) {
|
|
// do nothing
|
|
|
|
} else if (values && typeof(values) === 'object') {
|
|
var arrayValues = [];
|
|
coders.forEach(function(coder) {
|
|
arrayValues.push(values[coder.localName]);
|
|
});
|
|
values = arrayValues;
|
|
|
|
} else {
|
|
errors.throwError('invalid tuple value', errors.INVALID_ARGUMENT, {
|
|
coderType: 'tuple',
|
|
type: typeof(values),
|
|
value: values
|
|
});
|
|
}
|
|
|
|
if (coders.length !== values.length) {
|
|
errors.throwError('types/value length mismatch', errors.INVALID_ARGUMENT, {
|
|
coderType: 'tuple',
|
|
value: values
|
|
});
|
|
}
|
|
|
|
var parts = [];
|
|
|
|
coders.forEach(function(coder, index) {
|
|
parts.push({ dynamic: coder.dynamic, value: coder.encode(values[index]) });
|
|
});
|
|
|
|
var staticSize = 0, dynamicSize = 0;
|
|
parts.forEach(function(part, index) {
|
|
if (part.dynamic) {
|
|
staticSize += 32;
|
|
dynamicSize += alignSize(part.value.length);
|
|
} else {
|
|
staticSize += alignSize(part.value.length);
|
|
}
|
|
});
|
|
|
|
var offset = 0, dynamicOffset = staticSize;
|
|
var data = new Uint8Array(staticSize + dynamicSize);
|
|
|
|
parts.forEach(function(part, index) {
|
|
if (part.dynamic) {
|
|
//uint256Coder.encode(dynamicOffset).copy(data, offset);
|
|
data.set(uint256Coder.encode(dynamicOffset), offset);
|
|
offset += 32;
|
|
|
|
//part.value.copy(data, dynamicOffset); @TODO
|
|
data.set(part.value, dynamicOffset);
|
|
dynamicOffset += alignSize(part.value.length);
|
|
} else {
|
|
//part.value.copy(data, offset); @TODO
|
|
data.set(part.value, offset);
|
|
offset += alignSize(part.value.length);
|
|
}
|
|
});
|
|
|
|
return data;
|
|
}
|
|
|
|
function unpack(coders, data, offset) {
|
|
var baseOffset = offset;
|
|
var consumed = 0;
|
|
var value = [];
|
|
coders.forEach(function(coder) {
|
|
if (coder.dynamic) {
|
|
var dynamicOffset = uint256Coder.decode(data, offset);
|
|
var result = coder.decode(data, baseOffset + dynamicOffset.value.toNumber());
|
|
// The dynamic part is leap-frogged somewhere else; doesn't count towards size
|
|
result.consumed = dynamicOffset.consumed;
|
|
} else {
|
|
var result = coder.decode(data, offset);
|
|
}
|
|
|
|
if (result.value != undefined) {
|
|
value.push(result.value);
|
|
}
|
|
|
|
offset += result.consumed;
|
|
consumed += result.consumed;
|
|
});
|
|
|
|
coders.forEach(function(coder, index) {
|
|
var name = coder.localName;
|
|
if (!name) { return; }
|
|
|
|
if (typeof(name) === 'object') { name = name.name; }
|
|
if (!name) { return; }
|
|
|
|
if (name === 'length') { name = '_length'; }
|
|
|
|
if (value[name] != null) { return; }
|
|
|
|
value[name] = value[index];
|
|
});
|
|
|
|
return {
|
|
value: value,
|
|
consumed: consumed
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
function coderArray(coerceFunc, coder, length, localName) {
|
|
var type = (coder.type + '[' + (length >= 0 ? length: '') + ']');
|
|
|
|
return {
|
|
coder: coder,
|
|
localName: localName,
|
|
length: length,
|
|
name: 'array',
|
|
type: type,
|
|
encode: function(value) {
|
|
if (!Array.isArray(value)) {
|
|
errors.throwError('expected array value', errors.INVALID_ARGUMENT, {
|
|
arg: localName,
|
|
coderType: 'array',
|
|
type: typeof(value),
|
|
value: value
|
|
});
|
|
}
|
|
|
|
var count = length;
|
|
|
|
var result = new Uint8Array(0);
|
|
if (count === -1) {
|
|
count = value.length;
|
|
result = uint256Coder.encode(count);
|
|
}
|
|
|
|
if (count !== value.length) {
|
|
error.throwError('array value length mismatch', errors.INVALID_ARGUMENT, {
|
|
arg: localName,
|
|
coderType: 'array',
|
|
count: value.length,
|
|
expectedCount: count,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
var coders = [];
|
|
value.forEach(function(value) { coders.push(coder); });
|
|
|
|
return utils.concat([result, pack(coders, value)]);
|
|
},
|
|
decode: function(data, offset) {
|
|
// @TODO:
|
|
//if (data.length < offset + length * 32) { throw new Error('invalid array'); }
|
|
|
|
var consumed = 0;
|
|
|
|
var count = length;
|
|
|
|
if (count === -1) {
|
|
try {
|
|
var decodedLength = uint256Coder.decode(data, offset);
|
|
} catch (error) {
|
|
errors.throwError('insufficient data for dynamic array length', errors.INVALID_ARGUMENT, {
|
|
arg: localName,
|
|
coderType: 'array',
|
|
value: error.value
|
|
});
|
|
}
|
|
try {
|
|
count = decodedLength.value.toNumber();
|
|
} catch (error) {
|
|
errors.throwError('array count too large', errors.INVALID_ARGUMENT, {
|
|
arg: localName,
|
|
coderType: 'array',
|
|
value: decodedLength.value.toString()
|
|
});
|
|
}
|
|
consumed += decodedLength.consumed;
|
|
offset += decodedLength.consumed;
|
|
}
|
|
|
|
var coders = [];
|
|
for (var i = 0; i < count; i++) { coders.push(coder); }
|
|
|
|
var result = unpack(coders, data, offset);
|
|
result.consumed += consumed;
|
|
result.value = coerceFunc(type, result.value);
|
|
return result;
|
|
},
|
|
dynamic: (length === -1 || coder.dynamic)
|
|
}
|
|
}
|
|
|
|
|
|
function coderTuple(coerceFunc, coders, localName) {
|
|
|
|
var dynamic = false;
|
|
var types = [];
|
|
coders.forEach(function(coder) {
|
|
if (coder.dynamic) { dynamic = true; }
|
|
types.push(coder.type);
|
|
});
|
|
|
|
var type = ('tuple(' + types.join(',') + ')');
|
|
|
|
return {
|
|
coders: coders,
|
|
localName: localName,
|
|
name: 'tuple',
|
|
type: type,
|
|
encode: function(value) {
|
|
return pack(coders, value);
|
|
},
|
|
decode: function(data, offset) {
|
|
var result = unpack(coders, data, offset);
|
|
result.value = coerceFunc(type, result.value);
|
|
return result;
|
|
},
|
|
dynamic: dynamic
|
|
};
|
|
}
|
|
/*
|
|
function getTypes(coders) {
|
|
var type = coderTuple(coders).type;
|
|
return type.substring(6, type.length - 1);
|
|
}
|
|
*/
|
|
function splitNesting(value) {
|
|
var result = [];
|
|
var accum = '';
|
|
var depth = 0;
|
|
for (var offset = 0; offset < value.length; offset++) {
|
|
var c = value[offset];
|
|
if (c === ',' && depth === 0) {
|
|
result.push(accum);
|
|
accum = '';
|
|
} else {
|
|
accum += c;
|
|
if (c === '(') {
|
|
depth++;
|
|
} else if (c === ')') {
|
|
depth--;
|
|
if (depth === -1) {
|
|
throw new Error('unbalanced parenthsis');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
result.push(accum);
|
|
|
|
return result;
|
|
}
|
|
|
|
var paramTypeSimple = {
|
|
address: coderAddress,
|
|
bool: coderBoolean,
|
|
string: coderString,
|
|
bytes: coderDynamicBytes,
|
|
};
|
|
|
|
function getTupleParamCoder(coerceFunc, components, localName) {
|
|
if (!components) { components = []; }
|
|
var coders = [];
|
|
components.forEach(function(component) {
|
|
coders.push(getParamCoder(coerceFunc, component));
|
|
});
|
|
|
|
return coderTuple(coerceFunc, coders, localName);
|
|
}
|
|
|
|
function getParamCoder(coerceFunc, param) {
|
|
var coder = paramTypeSimple[param.type];
|
|
if (coder) { return coder(coerceFunc, param.name); }
|
|
|
|
var match = param.type.match(paramTypeNumber);
|
|
if (match) {
|
|
var size = parseInt(match[2] || 256);
|
|
if (size === 0 || size > 256 || (size % 8) !== 0) {
|
|
errors.throwError('invalid ' + match[1] + ' bit length', errors.INVALID_ARGUMENT, {
|
|
arg: 'param',
|
|
value: param
|
|
});
|
|
}
|
|
return coderNumber(coerceFunc, size / 8, (match[1] === 'int'), param.name);
|
|
}
|
|
|
|
var match = param.type.match(paramTypeBytes);
|
|
if (match) {
|
|
var size = parseInt(match[1]);
|
|
if (size === 0 || size > 32) {
|
|
errors.throwError('invalid bytes length', errors.INVALID_ARGUMENT, {
|
|
arg: 'param',
|
|
value: param
|
|
});
|
|
}
|
|
return coderFixedBytes(coerceFunc, size, param.name);
|
|
}
|
|
|
|
var match = param.type.match(paramTypeArray);
|
|
if (match) {
|
|
var size = parseInt(match[2] || -1);
|
|
param.type = match[1];
|
|
return coderArray(coerceFunc, getParamCoder(coerceFunc, param), size, param.name);
|
|
}
|
|
|
|
if (param.type.substring(0, 5) === 'tuple') {
|
|
return getTupleParamCoder(coerceFunc, param.components, param.name);
|
|
}
|
|
|
|
if (type === '') {
|
|
return coderNull(coerceFunc);
|
|
}
|
|
|
|
errors.throwError('invalid type', errors.INVALID_ARGUMENT, {
|
|
arg: 'type',
|
|
value: type
|
|
});
|
|
}
|
|
|
|
function Coder(coerceFunc) {
|
|
if (!(this instanceof Coder)) { throw new Error('missing new'); }
|
|
if (!coerceFunc) { coerceFunc = defaultCoerceFunc; }
|
|
utils.defineProperty(this, 'coerceFunc', coerceFunc);
|
|
}
|
|
|
|
// Legacy name support
|
|
// @TODO: In the next major version, remove names from decode/encode and don't do this
|
|
function populateNames(type, name) {
|
|
if (!name) { return; }
|
|
|
|
if (type.type.substring(0, 5) === 'tuple' && typeof(name) !== 'string') {
|
|
if (type.components.length != name.names.length) {
|
|
errors.throwError('names/types length mismatch', errors.INVALID_ARGUMENT, {
|
|
count: { names: name.names.length, types: type.components.length },
|
|
value: { names: name.names, types: type.components }
|
|
});
|
|
}
|
|
|
|
name.names.forEach(function(name, index) {
|
|
populateNames(type.components[index], name);
|
|
});
|
|
|
|
name = (name.name || '');
|
|
}
|
|
|
|
if (!type.name && typeof(name) === 'string') {
|
|
type.name = name;
|
|
}
|
|
}
|
|
|
|
utils.defineProperty(Coder.prototype, 'encode', function(names, types, values) {
|
|
|
|
// Names is optional, so shift over all the parameters if not provided
|
|
if (arguments.length < 3) {
|
|
values = types;
|
|
types = names;
|
|
names = [];
|
|
}
|
|
|
|
if (types.length !== values.length) {
|
|
errors.throwError('types/values length mismatch', errors.INVALID_ARGUMENT, {
|
|
count: { types: types.length, values: values.length },
|
|
value: { types: types, values: values }
|
|
});
|
|
}
|
|
|
|
var coders = [];
|
|
types.forEach(function(type, index) {
|
|
// Convert types to type objects
|
|
// - "uint foo" => { type: "uint", name: "foo" }
|
|
// - "tuple(uint, uint)" => { type: "tuple", components: [ { type: "uint" }, { type: "uint" }, ] }
|
|
if (typeof(type) === 'string') {
|
|
type = parseParam(type);
|
|
}
|
|
|
|
// Legacy support for passing in names (this is going away in the next major version)
|
|
populateNames(type, names[index]);
|
|
|
|
coders.push(getParamCoder(this.coerceFunc, type));
|
|
}, this);
|
|
|
|
return utils.hexlify(coderTuple(this.coerceFunc, coders).encode(values));
|
|
});
|
|
|
|
utils.defineProperty(Coder.prototype, 'decode', function(names, types, data) {
|
|
|
|
// Names is optional, so shift over all the parameters if not provided
|
|
if (arguments.length < 3) {
|
|
data = types;
|
|
types = names;
|
|
names = [];
|
|
}
|
|
|
|
data = utils.arrayify(data);
|
|
|
|
var coders = [];
|
|
types.forEach(function(type, index) {
|
|
|
|
// See encode for details
|
|
if (typeof(type) === 'string') {
|
|
type = parseParam(type);
|
|
}
|
|
|
|
// Legacy; going away in the next major version
|
|
populateNames(type, names[index]);
|
|
|
|
coders.push(getParamCoder(this.coerceFunc, type));
|
|
}, this);
|
|
|
|
return coderTuple(this.coerceFunc, coders).decode(data, 0).value;
|
|
|
|
});
|
|
|
|
utils.defineProperty(Coder, 'defaultCoder', new Coder());
|
|
|
|
utils.defineProperty(Coder, 'parseSignature', parseSignature);
|
|
|
|
|
|
module.exports = Coder
|