openethereum/js/packages/api/util/decode.js
Jaco Greeff 49fdd23d58 Ui 2 move to packages/* (#6113)
* Move secureApi to shell

* Extract isTestnet test

* Use mobx + subscriptions for status

* Re-add status indicator

* Add lerna

* Move intial packages to js/packages

* Move 3rdparty/{email,sms}-verification to correct location

* Move package.json & README to library src

* Move tests for library packages

* Move views & dapps to packages

* Move i18n to root

* Move shell to actual src (main app)

* Remove ~ references

* Change ~ to root (explicit imports)

* Finalise convert of ~

* Move views into dapps as well

* Move dapps to packages/

* Fix references

* Update css

* Update test spec locations

* Update tests

* Case fix

* Skip flakey tests

* Update enzyme

* Skip previously ignored tests

* Allow empty api for hw

* Re-add theme for embed
2017-07-21 15:46:53 +02:00

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3.0 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 { isHex } from './types';
import Func from '@parity/abi/spec/function';
import { fromParamType, toParamType } from '@parity/abi/spec/paramType/format';
export function decodeCallData (data) {
if (!isHex(data)) {
throw new Error('Input to decodeCallData should be a hex value');
}
if (data.substr(0, 2) === '0x') {
return decodeCallData(data.slice(2));
}
if (data.length < 8) {
throw new Error('Input to decodeCallData should be method signature + data');
}
const signature = data.substr(0, 8);
const paramdata = data.substr(8);
return {
signature: `0x${signature}`,
paramdata: `0x${paramdata}`
};
}
export function decodeMethodInput (methodAbi, paramdata) {
if (!methodAbi) {
throw new Error('decodeMethodInput should receive valid method-specific ABI');
}
if (paramdata && paramdata.length) {
if (!isHex(paramdata)) {
throw new Error('Input to decodeMethodInput should be a hex value');
}
if (paramdata.substr(0, 2) === '0x') {
return decodeMethodInput(methodAbi, paramdata.slice(2));
}
}
return new Func(methodAbi).decodeInput(paramdata).map((decoded) => decoded.value);
}
// takes a method in form name(...,types) and returns the inferred abi definition
export function methodToAbi (method) {
const length = method.length;
const typesStart = method.indexOf('(');
const typesEnd = method.indexOf(')');
if (typesStart === -1) {
throw new Error(`Missing start ( in call to decodeMethod with ${method}`);
} else if (typesEnd === -1) {
throw new Error(`Missing end ) in call to decodeMethod with ${method}`);
} else if (typesEnd < typesStart) {
throw new Error(`End ) is before start ( in call to decodeMethod with ${method}`);
} else if (typesEnd !== length - 1) {
throw new Error(`Extra characters after end ) in call to decodeMethod with ${method}`);
}
const name = method.substr(0, typesStart);
const types = method.substr(typesStart + 1, length - (typesStart + 1) - 1).split(',');
const inputs = types.filter((_type) => _type.length).map((_type) => {
const type = fromParamType(toParamType(_type));
return { type };
});
return { type: 'function', name, inputs };
}
export function abiDecode (inputTypes, data) {
return decodeMethodInput({
inputs: inputTypes.map((type) => {
return { type };
})
}, data);
}