73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
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// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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import { padAddress, padBool, padBytes, padFixedBytes, padU32, padString } from '../util/pad';
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import Mediate from './mediate';
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import Token from '../token/token';
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import { isArray, isInstanceOf } from '../util/types';
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export default class Encoder {
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static encode (tokens) {
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if (!isArray(tokens)) {
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throw new Error('tokens should be array of Token');
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}
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const mediates = tokens.map((token) => Encoder.encodeToken(token));
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const inits = mediates
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.map((mediate, idx) => mediate.init(Mediate.offsetFor(mediates, idx)))
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.join('');
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const closings = mediates
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.map((mediate, idx) => mediate.closing(Mediate.offsetFor(mediates, idx)))
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.join('');
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return `${inits}${closings}`;
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}
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static encodeToken (token) {
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if (!isInstanceOf(token, Token)) {
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throw new Error('token should be instanceof Token');
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}
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switch (token.type) {
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case 'address':
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return new Mediate('raw', padAddress(token.value));
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case 'int':
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case 'uint':
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return new Mediate('raw', padU32(token.value));
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case 'bool':
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return new Mediate('raw', padBool(token.value));
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case 'fixedBytes':
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return new Mediate('raw', padFixedBytes(token.value));
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case 'bytes':
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return new Mediate('prefixed', padBytes(token.value));
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case 'string':
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return new Mediate('prefixed', padString(token.value));
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case 'fixedArray':
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case 'array':
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return new Mediate(token.type, token.value.map((token) => Encoder.encodeToken(token)));
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default:
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throw new Error(`Invalid token type ${token.type} in encodeToken`);
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}
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}
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}
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