nem-library
Version:
Reactive Library for NEM
93 lines • 3.28 kB
JavaScript
;
/*
* The MIT License (MIT)
*
* Copyright (c) 2017 NEM
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const models_1 = require("../models");
const Listener_1 = require("./Listener");
/**
* Blockchain listener
*/
class BlockchainListener extends Listener_1.Listener {
/**
* Constructor
* @param nodes
*/
constructor(nodes) {
super(nodes);
}
/**
* Start listening new blocks
* @returns {Observable<Block>}
*/
newBlock() {
return rxjs_1.Observable.create((observer) => {
const client = this.createClient();
client.connect({}, () => {
client.subscribe("/blocks", (data) => {
try {
const dto = JSON.parse(data.body);
observer.next(models_1.Block.createFromBlockDTO(dto));
}
catch (e) {
observer.error(e);
}
});
}, (err) => {
observer.error(err);
});
return () => {
client.unsubscribe();
};
}).pipe(operators_1.retry(10));
}
/**
* Start listening new blockchain height
* @returns {Observable<BlockHeight>}
*/
newHeight() {
return rxjs_1.Observable.create((observer) => {
const client = this.createClient();
client.connect({}, () => {
client.subscribe("/blocks/new", (data) => {
try {
const dto = JSON.parse(data.body);
observer.next(dto.height);
}
catch (e) {
observer.error(e);
}
});
}, (err) => {
observer.error(err);
});
return () => {
client.unsubscribe();
};
}).pipe(operators_1.retry(10));
}
}
exports.BlockchainListener = BlockchainListener;
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