polkadotjs-app 导入以太坊格式助记词

import fs from "fs";
import { ApiPromise, Keyring, WsProvider, HttpProvider } from "@polkadot/api"
import { mnemonicGenerate, cryptoWaitReady } from "@polkadot/util-crypto";

async function main() {
  await cryptoWaitReady();

  // 1) 生成助记词
//   const mnemonic = mnemonicGenerate(); // 12 words
// const mnemonic = 'knee raccoon silk transfer move tortoise warm right eager travel smooth limb'
const mnemonic = 'immune dirt melody hour say remind era vivid oblige hope issue breeze'

  // 2) 使用 ECDSA 类型创建 Keyring
  const keyring = new Keyring({ type: "ethereum" });
  const pair = keyring.addFromUri(mnemonic, { name: "my-ecdsa-account" }, "ethereum");

  // 3) 设置导入时的加密口令
//   const password = "strong-passphrase-here";
  const password = null;

  // 4) 导出 JSON（polkadot.js apps 可直接导入）
//   const json = keyring.addPair(pair);
  const json1 = keyring.toJson(pair.address)
//   console.log('json1:', JSON.stringify(json1, null, 2))

  // 5) 写入文件
  const filename = `polkadotjs-ecdsa-${pair.address}.json`;
  fs.writeFileSync(filename, JSON.stringify(json1, null, 2), "utf-8");

  console.log("助记词:", mnemonic);
  console.log("地址:", pair.address);
  console.log("已写入文件:", filename);
  console.log("\n--- JSON 预览 ---\n", JSON.stringify(json1, null, 2).slice(0, 500), "\n...");
}

main().catch(console.error);