openethereum/js/packages/api/provider/promise.js

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// Copyright 2015-2017 Parity Technologies (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/>.
export default class PromiseProvider {
constructor (provider) {
this.provider = provider;
}
send = (method, ...params) => {
if (!this.provider.send) {
// old-style transport interface for backwards compatibility
return this.provider.execute(method, params);
}
return new Promise((resolve, reject) => {
this.provider.send(method, params, (error, result) => {
if (error) {
reject(error);
} else {
resolve(result);
}
});
});
}
}