97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
// 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 * as abis from './abi';
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export default class Registry {
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constructor (api) {
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this._api = api;
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this._contracts = [];
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this._instance = null;
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this._fetching = false;
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this._queue = [];
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this.getInstance();
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}
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getInstance () {
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if (this._instance) {
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return Promise.resolve(this._instance);
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}
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if (this._fetching) {
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return new Promise((resolve) => {
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this._queue.push({ resolve });
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});
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}
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this._fetching = true;
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return this._api.parity
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.registryAddress()
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.then((address) => {
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this._fetching = false;
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this._instance = this._api.newContract(abis.registry, address).instance;
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this._queue.forEach((queued) => {
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queued.resolve(this._instance);
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});
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this._queue = [];
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return this._instance;
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});
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}
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getContract (_name) {
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const name = _name.toLowerCase();
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return new Promise((resolve, reject) => {
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if (this._contracts[name]) {
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resolve(this._contracts[name]);
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return;
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}
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this
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.lookupAddress(name)
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.then((address) => {
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this._contracts[name] = this._api.newContract(abis[name], address);
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resolve(this._contracts[name]);
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})
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.catch(reject);
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});
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}
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getContractInstance (_name) {
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return this
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.getContract(_name)
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.then((contract) => contract.instance);
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}
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lookupAddress (_name) {
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const name = _name.toLowerCase();
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const sha3 = this._api.util.sha3(name);
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return this.getInstance().then((instance) => {
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return instance.getAddress.call({}, [sha3, 'A']);
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})
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.then((address) => {
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console.log('lookupAddress', name, sha3, address);
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return address;
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});
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}
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}
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