43 lines
1.4 KiB
JavaScript
43 lines
1.4 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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const isValidReceipt = (receipt) => {
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return receipt && receipt.blockNumber && receipt.blockNumber.gt(0);
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};
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const waitForConfirmations = (api, tx, confirmations) => {
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return new Promise((resolve, reject) => {
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api.pollMethod('eth_getTransactionReceipt', tx, isValidReceipt)
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.then((receipt) => {
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let subscription;
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api.subscribe('eth_blockNumber', (err, block) => {
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if (err) {
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reject(err);
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} else if (block.minus(confirmations - 1).gte(receipt.blockNumber)) {
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api.unsubscribe(subscription);
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resolve();
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}
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})
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.then((_subscription) => {
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subscription = _subscription;
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})
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.catch(reject);
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});
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});
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};
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export default waitForConfirmations;
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