@onekeyfe/blockchain-link
Version:
High-level javascript interface for blockchain communication
325 lines (324 loc) • 13.4 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
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extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
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extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
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Object.defineProperty(exports, "__esModule", { value: true });
var events_1 = require("events");
var errors_1 = require("./constants/errors");
var constants_1 = require("./constants");
var deferred_1 = require("./utils/deferred");
var workerWrapper = function (factory) {
if (typeof factory === 'function')
return factory();
if (typeof factory === 'string' && typeof Worker !== 'undefined')
return new Worker(factory);
throw new errors_1.CustomError('worker_not_found');
};
var initWorker = function (_a) {
var factory = _a.worker, settings = __rest(_a, ["worker"]);
var dfd = deferred_1.create(-1);
var worker = workerWrapper(factory);
if (typeof worker !== 'object' || typeof worker.postMessage !== 'function') {
throw new errors_1.CustomError('worker_invalid');
}
var timeout = setTimeout(function () {
worker.onmessage = null;
worker.onerror = null;
dfd.reject(new errors_1.CustomError('worker_timeout'));
}, settings.timeout || 30000);
worker.onmessage = function (message) {
if (message.data.type !== constants_1.MESSAGES.HANDSHAKE)
return;
clearTimeout(timeout);
worker.postMessage({
type: constants_1.MESSAGES.HANDSHAKE,
settings: settings,
});
dfd.resolve(worker);
};
worker.onerror = function (error) {
clearTimeout(timeout);
worker.onmessage = null;
worker.onerror = null;
try {
worker.terminate();
}
catch (error) {
}
var message = error.message
? "Worker runtime error: Line " + error.lineno + " in " + error.filename + ": " + error.message
: 'Worker handshake error';
dfd.reject(new errors_1.CustomError('worker_runtime', message));
};
return dfd.promise;
};
var BlockchainLink = (function (_super) {
__extends(BlockchainLink, _super);
function BlockchainLink(settings) {
var _this = _super.call(this) || this;
_this.messageId = 0;
_this.deferred = [];
_this.onMessage = function (event) {
if (!event.data)
return;
var data = event.data;
if (data.id === -1) {
_this.onEvent(data);
return;
}
var dfd = _this.deferred.find(function (d) { return d.id === data.id; });
if (!dfd) {
return;
}
if (data.type === constants_1.RESPONSES.ERROR) {
dfd.reject(new errors_1.CustomError(data.payload.code, data.payload.message));
}
else {
dfd.resolve(data.payload);
}
_this.deferred = _this.deferred.filter(function (d) { return d !== dfd; });
};
_this.onEvent = function (data) {
if (data.type === constants_1.RESPONSES.CONNECTED) {
_this.emit('connected');
}
if (data.type === constants_1.RESPONSES.DISCONNECTED) {
_this.emit('disconnected');
}
if (data.type === constants_1.RESPONSES.NOTIFICATION) {
_this.emit(data.payload.type, data.payload.payload);
}
};
_this.onError = function (error) {
var message = error.message
? "Worker runtime error: Line " + error.lineno + " in " + error.filename + ": " + error.message
: 'Worker handshake error';
var e = new errors_1.CustomError('worker_runtime', message);
_this.deferred.forEach(function (d) {
d.reject(e);
});
_this.deferred = [];
};
_this.settings = settings;
return _this;
}
BlockchainLink.prototype.getWorker = function () {
return __awaiter(this, void 0, void 0, function () {
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!!this.worker) return [3, 2];
_a = this;
return [4, initWorker(this.settings)];
case 1:
_a.worker = _b.sent();
this.worker.onmessage = this.onMessage.bind(this);
this.worker.onerror = this.onError.bind(this);
_b.label = 2;
case 2: return [2, this.worker];
}
});
});
};
BlockchainLink.prototype.sendMessage = function (message) {
return __awaiter(this, void 0, void 0, function () {
var worker, dfd;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.getWorker()];
case 1:
worker = _a.sent();
dfd = deferred_1.create(this.messageId);
this.deferred.push(dfd);
worker.postMessage(__assign({ id: this.messageId }, message));
this.messageId++;
return [2, dfd.promise];
}
});
});
};
BlockchainLink.prototype.connect = function () {
return this.sendMessage({
type: constants_1.MESSAGES.CONNECT,
});
};
BlockchainLink.prototype.getInfo = function () {
return this.sendMessage({
type: constants_1.MESSAGES.GET_INFO,
});
};
BlockchainLink.prototype.getBlockHash = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_BLOCK_HASH,
payload: payload,
});
};
BlockchainLink.prototype.getAccountInfo = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_ACCOUNT_INFO,
payload: payload,
});
};
BlockchainLink.prototype.getAccountUtxo = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_ACCOUNT_UTXO,
payload: payload,
});
};
BlockchainLink.prototype.getTransaction = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_TRANSACTION,
payload: payload,
});
};
BlockchainLink.prototype.getAccountBalanceHistory = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_ACCOUNT_BALANCE_HISTORY,
payload: payload,
});
};
BlockchainLink.prototype.getCurrentFiatRates = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_CURRENT_FIAT_RATES,
payload: payload,
});
};
BlockchainLink.prototype.getFiatRatesForTimestamps = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_FIAT_RATES_FOR_TIMESTAMPS,
payload: payload,
});
};
BlockchainLink.prototype.getFiatRatesTickersList = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.GET_FIAT_RATES_TICKERS_LIST,
payload: payload,
});
};
BlockchainLink.prototype.estimateFee = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.ESTIMATE_FEE,
payload: payload,
});
};
BlockchainLink.prototype.subscribe = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.SUBSCRIBE,
payload: payload,
});
};
BlockchainLink.prototype.unsubscribe = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.UNSUBSCRIBE,
payload: payload,
});
};
BlockchainLink.prototype.pushTransaction = function (payload) {
return this.sendMessage({
type: constants_1.MESSAGES.PUSH_TRANSACTION,
payload: payload,
});
};
BlockchainLink.prototype.disconnect = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (!this.worker)
return [2, true];
return [2, this.sendMessage({
type: constants_1.MESSAGES.DISCONNECT,
})];
});
});
};
BlockchainLink.prototype.dispose = function () {
this.removeAllListeners();
var worker = this.worker;
if (worker) {
worker.terminate();
delete this.worker;
}
};
return BlockchainLink;
}(events_1.EventEmitter));
exports.default = BlockchainLink;
__exportStar(require("./types/common"), exports);
__exportStar(require("./types/events"), exports);