...教程的前端 api 例子:
```typescript
import program from "commander";
import * as fs from "fs";
import { ApiPromise, WsProvider, Keyring } from "@polkadot/api";
import { blake2AsHex } from "@polkadot/util-crypto";
const wsProvider = new WsProvider("ws://127.0.0.1:9944");
module...