70 lines
2.1 KiB
JavaScript
70 lines
2.1 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
|
|
// This file is part of Parity.
|
|
|
|
// Parity is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Parity is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import Abi from '~/abi';
|
|
import Func from '~/abi/spec/function';
|
|
|
|
import { abiDecode } from './decode';
|
|
import { cleanupValue } from './format';
|
|
import { sha3 } from './sha3';
|
|
|
|
export function encodeMethodCallAbi (methodAbi = {}, values = []) {
|
|
const func = new Func(methodAbi);
|
|
const tokens = Abi.encodeTokens(func.inputParamTypes(), values);
|
|
const call = func.encodeCall(tokens);
|
|
|
|
return `0x${call}`;
|
|
}
|
|
|
|
export function abiEncode (methodName, inputTypes, data) {
|
|
const result = encodeMethodCallAbi({
|
|
name: methodName || '',
|
|
type: 'function',
|
|
inputs: inputTypes.map((type) => {
|
|
return { type };
|
|
})
|
|
}, data);
|
|
|
|
return result;
|
|
}
|
|
|
|
export function abiUnencode (abi, data) {
|
|
const callsig = data.substr(2, 8);
|
|
const op = abi.find((field) => {
|
|
return field.type === 'function' &&
|
|
abiSignature(field.name, field.inputs.map((input) => input.type)).substr(2, 8) === callsig;
|
|
});
|
|
|
|
if (!op) {
|
|
console.warn(`Unknown function ID: ${callsig}`);
|
|
return null;
|
|
}
|
|
|
|
let argsByIndex = abiDecode(op.inputs.map((field) => field.type), '0x' + data.substr(10))
|
|
.map((value, index) => cleanupValue(value, op.inputs[index].type));
|
|
const argsByName = op.inputs.reduce((result, field, index) => {
|
|
result[field.name] = argsByIndex[index];
|
|
|
|
return result;
|
|
}, {});
|
|
|
|
return [op.name, argsByName, argsByIndex];
|
|
}
|
|
|
|
export function abiSignature (name, inputs) {
|
|
return sha3(`${name}(${inputs.join()})`);
|
|
}
|