77 lines
2.2 KiB
JavaScript
77 lines
2.2 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 { api } from './parity';
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import { eip20 as eip20Abi } from '~/contracts/abi';
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export const INVALID_URL_HASH = '0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470';
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export const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
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/**
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* Convert the given URL to a content hash,
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* and checks if it is already registered in GHH
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*/
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export const urlToHash = (ghhInstance, url) => {
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if (!url || !url.length) {
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return Promise.resolve(null);
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}
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return api.parity
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.hashContent(url)
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.catch((error) => {
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const message = error.text || error.message || error.toString();
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throw new Error(`${message} (${url})`);
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})
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.then((contentHash) => {
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console.log('lookupHash', url, contentHash);
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if (contentHash === INVALID_URL_HASH) {
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throw new Error(`"${url}" is not a valid URL`);
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}
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return ghhInstance.entries
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.call({}, [contentHash])
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.then(([accountSlashRepo, commit, contentHashOwner]) => {
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const registered = (contentHashOwner !== ZERO_ADDRESS);
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return {
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hash: contentHash,
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registered
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};
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});
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});
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};
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export const getTokenTotalSupply = (tokenAddress) => {
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return api
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.eth
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.getCode(tokenAddress)
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.then(code => {
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if (!code || /^(0x)?0?$/.test(code)) {
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return null;
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}
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const contract = api.newContract(eip20Abi, tokenAddress);
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return contract
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.instance
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.totalSupply
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.call({}, []);
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});
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};
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