scrypt-ts
Version:
A toolset for building sCrypt smart contract applications on Bitcoin SV network written in typescript.
125 lines • 6.18 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ContractApi = void 0;
const get_latest_instance_1 = require("./contract/get-latest-instance");
const sync_hashed_props_1 = require("./contract/sync-hashed-props");
const utils_1 = require("./../utils");
const io = require('socket.io-client');
const wait = ms => new Promise(r => setTimeout(r, ms));
const retryOperation = (operation, delay, retries, reasonCallback) => new Promise((resolve, reject) => {
return operation()
.then(resolve)
.catch((reason) => {
if (retries > 0 && (reasonCallback && reasonCallback(reason) || typeof reasonCallback === 'undefined')) {
return wait(delay)
.then(retryOperation.bind(null, operation, delay, retries - 1))
.then(resolve)
.catch(reject);
}
return reject(reason);
});
});
class ContractApi {
constructor(_core) {
this._core = _core;
}
/** @ignore */
syncHashedProps(instance) {
return __awaiter(this, void 0, void 0, function* () {
return this._core.actionResolver.resolve(new sync_hashed_props_1.SyncHashedPropsAction(), { instance });
});
}
/**
* Get a contract instance containing the latest state of the contract by the contract ID.
* The obtained contract instance may also be obtained by other users at the same time.
* If other users call this contract instance. Then the contract instance will be invalid.
* At this time, calling the contract will cause a `txn-mempool-conflict` error (that is, UTXO double spending).
* If this error occurs, you need to re-acquire the contract instance
* @param clazz
* @param contractId
* @returns a contract instance contains latest state
*/
getLatestInstance(clazz, contractId) {
return __awaiter(this, void 0, void 0, function* () {
const instance = yield retryOperation(() => {
return this._core.actionResolver.resolve(new get_latest_instance_1.GetLatestInstanceAction(), { clazz, contractId });
}, 3000, 10, (reason) => reason.message.includes('The utxo related to the contract was not found'));
return instance;
});
}
/**
* Subscribe to notifications of contract status changes by contract ID,
* @param options SubscribeOptions
* @param cb
* @returns a SubScription, which can be used to unsubscribe
*/
subscribe(options, cb) {
const self = this;
const baseUrl = this._core.getBaseUrl();
const apiKey = this._core.getApiKey();
const socket = io(baseUrl, {
path: '/streams/contract',
query: options.id,
auth: {
token: apiKey
}
});
let unsubscribe = () => {
socket.close();
self._core.events.delete(`${options.id.txId}:${options.id.outputIndex}`);
self._core.logger.info('unsubscribe', `The connection to ${options.id.txId}:${options.id.outputIndex} has been unsubscribed.`);
};
socket.on('connect', function () {
self._core.logger.info('Connected', `The connection to ${options.id.txId}:${options.id.outputIndex} has been established.`);
});
socket.on("connect_error", (error) => {
self._core.logger.error('connect_error', `The connection`);
});
socket.on('utxoSpent', function (data) {
return __awaiter(this, void 0, void 0, function* () {
self._core.logger.debug('utxoSpent', `Got message ${options.id.txId}:${options.id.outputIndex}: ${data}`);
let SCClazz = options.clazz;
const tx = yield (0, utils_1.getTransaction)(self._core.getNetWork(), data.spentBy.txId);
const calldata = SCClazz.parseCallData(tx, data.spentBy.inputIndex);
if (Array.isArray(options.methodNames) && !options.methodNames.includes(calldata.methodName)) {
// MethodNames that users don't care about
return;
}
const nexts = Array.isArray(data.createdInSpentTxOutputs) ? data.createdInSpentTxOutputs.map(outputIndex => SCClazz.fromTx(tx, outputIndex)) : [];
cb({
nexts,
methodName: calldata.methodName,
args: calldata.args.map(a => a.value),
tx
});
});
});
socket.on('subscribeFailed', function (errorMessage) {
self._core.logger.error('subscribeFailed', `Subscribe contract ${options.id.txId}:${options.id.outputIndex} failed: ${errorMessage}.`);
unsubscribe();
});
socket.on('error', function ({ statusCode, errorMsg }) {
self._core.logger.error(`websocket error`, `statusCode=${statusCode}, errorMsg=${errorMsg}`);
unsubscribe();
});
socket.on('disconnect', function () {
self._core.logger.info('Disconnected', `The connection to ${options.id.txId}:${options.id.outputIndex} disconnected.`);
self._core.events.delete(`${options.id.txId}:${options.id.outputIndex}`);
});
this._core.events.set(`${options.id.txId}:${options.id.outputIndex}`, socket);
return {
unsubscribe
};
}
}
exports.ContractApi = ContractApi;
//# sourceMappingURL=contract-api.js.map