web3.js/test/coder.decodeParam.js

var chai = require('chai');
var assert = chai.assert;
var coder = require('../lib/solidity/coder');
var BigNumber = require('bignumber.js');
var bn = BigNumber;


describe('lib/solidity/coder', function () {
    describe('decodeParam', function () {
        var test = function (t) {
            it('should turn ' + t.value + ' to ' + t.expected, function () {
                assert.deepEqual(coder.decodeParam(t.type, t.value), t.expected);
            });
        };


        test({ type: 'int', expected: new bn(1),            value: '0000000000000000000000000000000000000000000000000000000000000001'});
        test({ type: 'int', expected: new bn(16),           value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'int', expected: new bn(-1),           value: 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'});
        test({ type: 'int256', expected: new bn(1),         value: '0000000000000000000000000000000000000000000000000000000000000001'});
        test({ type: 'int256', expected: new bn(16),        value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'int256', expected: new bn(-1),        value: 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'});
        test({ type: 'int8', expected: new bn(16),          value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'int32', expected: new bn(16),         value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'int64', expected: new bn(16),         value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'int128', expected: new bn(16),        value: '0000000000000000000000000000000000000000000000000000000000000010'});
        test({ type: 'bytes32', expected: '0x6761766f66796f726b0000000000000000000000000000000000000000000000',      
                                                            value: '6761766f66796f726b0000000000000000000000000000000000000000000000'});
        test({ type: 'bytes', expected: '0x6761766f66796f726b',       
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000009' + 
                                                                   '6761766f66796f726b0000000000000000000000000000000000000000000000'});
        test({ type: 'bytes32', expected: '0x731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',      
                                                            value: '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
        test({ type: 'bytes', expected: '0x731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',       
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000020' + 
                                                                   '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
        test({ type: 'bytes', expected: '0x731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                          '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',       
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000040' + 
                                                                   '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                   '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
        test({ type: 'bytes', expected: '0x131a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                          '231a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                          '331a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',       
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000060' + 
                                                                   '131a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                   '231a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                   '331a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
        test({ type: 'string', expected: 'gavofyork',       value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000009' + 
                                                                   '6761766f66796f726b0000000000000000000000000000000000000000000000'});
        test({ type: 'string', expected: '\xc3\xa4\x00\x00\xc3\xa4',
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000006' + 
                                                                   'c3a40000c3a40000000000000000000000000000000000000000000000000000'});
        test({ type: 'string', expected: '\xc3',
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000001' + 
                                                                   'c300000000000000000000000000000000000000000000000000000000000000'});
        test({ type: 'bytes', expected: '0xc3a40000c3a4',
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000006' + 
                                                                   'c3a40000c3a40000000000000000000000000000000000000000000000000000'});
        test({ type: 'bytes32', expected: '0xc3a40000c3a40000000000000000000000000000000000000000000000000000',
                                                            value: 'c3a40000c3a40000000000000000000000000000000000000000000000000000'});
        test({ type: 'int[]', expected: [],                 value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000000'});
        test({ type: 'int[]', expected: [new bn(3)],        value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000001' + 
                                                                   '0000000000000000000000000000000000000000000000000000000000000003'});
        test({ type: 'int256[]', expected: [new bn(3)],     value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000001' + 
                                                                   '0000000000000000000000000000000000000000000000000000000000000003'});
        test({ type: 'int[]', expected: [new bn(1), new bn(2), new bn(3)],
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000003' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000001' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000002' +
                                                                   '0000000000000000000000000000000000000000000000000000000000000003'});
        test({ type: 'bool', expected: true,                value: '0000000000000000000000000000000000000000000000000000000000000001'});
        test({ type: 'bool', expected: false,               value: '0000000000000000000000000000000000000000000000000000000000000000'});
        test({ type: 'real', expected: new bn(1),           value: '0000000000000000000000000000000100000000000000000000000000000000'});
        test({ type: 'real', expected: new bn(2.125),       value: '0000000000000000000000000000000220000000000000000000000000000000'});
        test({ type: 'real', expected: new bn(8.5),         value: '0000000000000000000000000000000880000000000000000000000000000000'});
        test({ type: 'real', expected: new bn(-1),          value: 'ffffffffffffffffffffffffffffffff00000000000000000000000000000000'});
        test({ type: 'ureal', expected: new bn(1),          value: '0000000000000000000000000000000100000000000000000000000000000000'});
        test({ type: 'ureal', expected: new bn(2.125),      value: '0000000000000000000000000000000220000000000000000000000000000000'});
        test({ type: 'ureal', expected: new bn(8.5),        value: '0000000000000000000000000000000880000000000000000000000000000000'});
        test({ type: 'address', expected: '0x407d73d8a49eeb85d32cf465507dd71d507100c1',          
                                                            value: '000000000000000000000000407d73d8a49eeb85d32cf465507dd71d507100c1'});
        test({ type: 'string', expected: 'welcome to ethereum. welcome to ethereum. welcome to ethereum.',
                                                            value: '0000000000000000000000000000000000000000000000000000000000000020' + 
                                                                    '000000000000000000000000000000000000000000000000000000000000003e' + 
                                                                    '77656c636f6d6520746f20657468657265756d2e2077656c636f6d6520746f20' + 
                                                                    '657468657265756d2e2077656c636f6d6520746f20657468657265756d2e0000'});
    });
});

describe('lib/solidity/coder', function () {
    describe('decodeParams', function () {
        var test = function (t) {
            it('should turn ' + t.values + ' to ' + t.expected, function () {
                assert.deepEqual(coder.decodeParams(t.types, t.values), t.expected);
            });
        };


        test({ types: ['int'], expected: [new bn(1)],       values: '0000000000000000000000000000000000000000000000000000000000000001'});
        test({ types: ['bytes32', 'int'], expected: ['0x6761766f66796f726b0000000000000000000000000000000000000000000000', new bn(5)],
                                                            values: '6761766f66796f726b0000000000000000000000000000000000000000000000' + 
                                                                    '0000000000000000000000000000000000000000000000000000000000000005'});
        test({ types: ['int', 'bytes32'], expected: [new bn(5), '0x6761766f66796f726b0000000000000000000000000000000000000000000000'],
                                                            values: '0000000000000000000000000000000000000000000000000000000000000005' + 
                                                                    '6761766f66796f726b0000000000000000000000000000000000000000000000'});
        test({ types: ['int', 'string', 'int', 'int', 'int', 'int[]'], expected: [new bn(1), 'gavofyork', new bn(2), new bn(3), new bn(4), 
                                                                                 [new bn(5), new bn(6), new bn(7)]],
                                                            values: '0000000000000000000000000000000000000000000000000000000000000001' +
                                                                    '00000000000000000000000000000000000000000000000000000000000000c0' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000002' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000003' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000004' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000100' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000009' +
                                                                    '6761766f66796f726b0000000000000000000000000000000000000000000000' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000003' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000005' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000006' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000007'});
        test({ types: ['int', 'bytes', 'int', 'bytes'], expected: [
                                                                    new bn(5),
                                                                    '0x131a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                      '231a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',
                                                                    new bn(3),
                                                                    '0x331a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                      '431a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',
                                                                    ],
                                                            values: '0000000000000000000000000000000000000000000000000000000000000005' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000080' + 
                                                                    '0000000000000000000000000000000000000000000000000000000000000003' + 
                                                                    '00000000000000000000000000000000000000000000000000000000000000e0' + 
                                                                    '0000000000000000000000000000000000000000000000000000000000000040' + 
                                                                    '131a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                    '231a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000040' + 
                                                                    '331a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b' +
                                                                    '431a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
    });
});