openethereum/js/src/contracts/sms-verification.js

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// Copyright 2015, 2016 Ethcore (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 subscribeToEvent from '../util/subscribe-to-event';
export const checkIfVerified = (contract, account) => {
return contract.instance.certified.call({}, [account]);
};
export const checkIfRequested = (contract, account) => {
let subId = null;
let resolved = false;
return new Promise((resolve, reject) => {
contract
.subscribe('Requested', {
fromBlock: 0, toBlock: 'pending'
}, (err, logs) => {
if (err) {
return reject(err);
}
const e = logs.find((l) => {
return l.type === 'mined' && l.params.who && l.params.who.value === account;
});
resolve(e ? e.transactionHash : false);
resolved = true;
if (subId) {
contract.unsubscribe(subId);
}
})
.then((_subId) => {
subId = _subId;
if (resolved) {
contract.unsubscribe(subId);
}
});
});
};
const blockNumber = (api) => {
return new Promise((resolve, reject) => {
api.subscribe('eth_blockNumber', (err, block) => {
if (err) {
return reject(err);
}
resolve(block);
})
.then((subscription) => {
api.unsubscribe(subscription);
})
.catch(reject);
});
};
export const awaitPuzzle = (api, contract, account) => {
return blockNumber(api)
.then((block) => {
return new Promise((resolve, reject) => {
const subscription = subscribeToEvent(contract, 'Puzzled', {
from: block.toNumber(),
filter: (log) => log.params.who.value === account
});
subscription.once('error', reject);
subscription.once('log', subscription.unsubscribe);
subscription.once('log', resolve);
subscription.once('timeout', () => {
reject(new Error('Timed out waiting for the puzzle.'));
});
});
});
};