129 lines
3.4 KiB
JavaScript
129 lines
3.4 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (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 { bytesToHex, hexToAscii } from '~/api/util/format';
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import ABI from './abi/certifier.json';
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const ZERO20 = '0x0000000000000000000000000000000000000000';
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const ZERO32 = '0x0000000000000000000000000000000000000000000000000000000000000000';
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export default class BadgeReg {
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constructor (api, registry) {
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this._api = api;
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this._registry = registry;
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registry.getContract('badgereg');
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this.certifiers = []; // by id
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this.contracts = {}; // by name
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}
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getContract () {
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return this._registry.getContract('badgereg');
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}
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certifierCount () {
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return this
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.getContract()
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.then((badgeReg) => {
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return badgeReg.instance.badgeCount.call({}, [])
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.then((count) => count.valueOf());
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});
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}
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fetchCertifier (id) {
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if (this.certifiers[id]) {
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return Promise.resolve(this.certifiers[id]);
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}
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return this
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.getContract()
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.then((badgeReg) => {
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return badgeReg.instance.badge.call({}, [ id ]);
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})
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.then(([ address, name ]) => {
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if (address === ZERO20) {
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throw new Error(`Certifier ${id} does not exist.`);
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}
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name = bytesToHex(name);
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name = name === ZERO32
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? null
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: hexToAscii(name);
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return this.fetchMeta(id)
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.then(({ title, icon }) => {
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const data = { address, id, name, title, icon };
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this.certifiers[id] = data;
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return data;
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});
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});
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}
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fetchCertifierByName (name) {
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return this
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.getContract()
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.then((badgeReg) => {
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return badgeReg.instance.fromName.call({}, [ name ]);
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})
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.then(([ id, address, owner ]) => {
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if (address === ZERO20) {
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throw new Error(`Certifier ${name} does not exist.`);
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}
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return this.fetchMeta(id)
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.then(({ title, icon }) => {
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const data = { address, id, name, title, icon };
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this.certifiers[id] = data;
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return data;
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});
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});
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}
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fetchMeta (id) {
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return this
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.getContract()
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.then((badgeReg) => {
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return Promise.all([
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badgeReg.instance.meta.call({}, [id, 'TITLE']),
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badgeReg.instance.meta.call({}, [id, 'IMG'])
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]);
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})
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.then(([ title, icon ]) => {
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title = bytesToHex(title);
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title = title === ZERO32 ? null : hexToAscii(title);
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if (bytesToHex(icon) === ZERO32) {
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icon = null;
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}
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return { title, icon };
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});
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}
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checkIfCertified (certifier, address) {
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if (!this.contracts[certifier]) {
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this.contracts[certifier] = this._api.newContract(ABI, certifier);
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}
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const contract = this.contracts[certifier];
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return contract.instance.certified.call({}, [address]);
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}
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}
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