@parity/light.js
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A high-level reactive JS library optimized for light clients
167 lines (166 loc) • 7.86 kB
JavaScript
;
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity.
//
// SPDX-License-Identifier: MIT
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var asyncRetry = require("async-retry");
var debug = require("debug");
var rxjs_1 = require("rxjs");
var api_1 = require("../../api");
function getTransactionByHash(transactionHash, api) {
var _this = this;
// We poll `eth_getTransactionByHash` 20 times, until we get a valid
// transaction included in a block.
return asyncRetry(function (_, attempt) { return __awaiter(_this, void 0, void 0, function () {
var tx;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
debug('@parity/light.js:getTransactionByHash')("Attempt #" + attempt + " to eth_getTransactionByHash.");
return [4 /*yield*/, api.eth.getTransactionByHash(transactionHash)];
case 1:
tx = _a.sent();
if (!tx || !tx.blockNumber || tx.blockNumber.eq(0)) {
throw new Error('Transaction did not go through');
}
return [2 /*return*/, tx];
}
});
}); }, {
retries: 20
});
}
/**
* Post a transaction to the network.
*
* Calls, in this order, `eth_estimateGas`, `personal_signTransaction`,
* `eth_sendRawTransaction` and `eth_getTransactionByHash` to get the status of
* the transaction.
*
* @param tx - Transaction object
* @param options - Options to pass to the {@link RpcObservable}.
* @param options.passphrase - Passphrase of the account
* @return - The status of the transaction: (estimated), signed, sent, confirmed
*/
function post$(tx, options) {
var _this = this;
if (!options || !options.passphrase) {
throw new Error('The passphrase is missing from the options');
}
var estimate = options.estimate, passphrase = options.passphrase, provider = options.provider;
var api = provider ? api_1.createApiFromProvider(provider) : api_1.getApi();
var source$ = rxjs_1.Observable.create(function (observer) { return __awaiter(_this, void 0, void 0, function () {
var gas, signedTransaction, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 4, , 5]);
if (!estimate) return [3 /*break*/, 2];
observer.next({ estimating: true });
return [4 /*yield*/, api.eth.estimateGas(tx)];
case 1:
gas = _a.sent();
observer.next({ estimated: gas });
_a.label = 2;
case 2: return [4 /*yield*/, api.personal.signTransaction(tx, passphrase)];
case 3:
signedTransaction = _a.sent();
observer.next({ signed: signedTransaction.raw });
// eslint-disable-next-line @typescript-eslint/no-use-before-define
postRaw$(signedTransaction.raw).subscribe(observer);
return [3 /*break*/, 5];
case 4:
error_1 = _a.sent();
observer.next({ failed: error_1 });
observer.error(error_1);
return [3 /*break*/, 5];
case 5: return [2 /*return*/];
}
});
}); });
return source$;
}
exports.post$ = post$;
/**
* Post a raw (signed) transaction to the network.
*
* Calls, in this order, `eth_sendRawTransaction` and
* `eth_getTransactionByHash` to get the status of the transaction.
*
* Note: if using parity-ethereum light client, this method only works with
* >=v2.5.0. See https://github.com/paritytech/parity-ethereum/pull/10559 for
* more info.
*
* @param rawTx - Raw transaction
* @param options? - Options to pass to the {@link RpcObservable}.
* @return - The status of the transaction: sent, confirmed
*/
function postRaw$(rawTx, options) {
var _this = this;
if (options === void 0) { options = {}; }
var provider = options.provider;
var api = provider ? api_1.createApiFromProvider(provider) : api_1.getApi();
var source$ = rxjs_1.Observable.create(function (observer) { return __awaiter(_this, void 0, void 0, function () {
var transactionHash, receipt, error_2;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 3, , 4]);
return [4 /*yield*/, api.eth.sendRawTransaction(rawTx)];
case 1:
transactionHash = _a.sent();
observer.next({ sent: transactionHash });
return [4 /*yield*/, getTransactionByHash(transactionHash, api)];
case 2:
receipt = _a.sent();
observer.next({ confirmed: receipt });
observer.complete();
return [3 /*break*/, 4];
case 3:
error_2 = _a.sent();
observer.next({ failed: error_2 });
observer.error(error_2);
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
}); });
return source$;
}
exports.postRaw$ = postRaw$;