Typescript 如何创建由一个帐户签名但使用另一个帐户支付的Hedera交易

经过多次try ，我找到了解决问题的办法.

当Bob创建交易时，他需要使用setTransactionId()方法设置transactionId，如下所示:

const transaction = new TokenCreateTransaction()
  .setTransactionId(transactionId)

transactionId参数在这一过程中至关重要.Bob必须使用Alice的Account ID创建它，以将Alice指定为交易的付款人.要生成它，Bob可以使用TransactionId class中的generate()方法.确保在代码的开头导入类:

import { TransactionId } from "@hashgraph/sdk";

const transactionId = TransactionId.generate(aliceAccountId)

通过这种方式，我们可以确保Bob发起、冻结和签署交易，同时指定Alice作为支付交易费用的支付账户.

重要提示:此流程要求Bob在创建事务之前知道Alice的Account ID.

以下是所有更新的代码(只添加了2行，并用注释标记为:<--- New Line):

import {
  AccountId,
  TokenCreateTransaction,
  TokenType,
  PrivateKey,
  Client,
  TransactionId, // <--- New Line
} from "@hashgraph/sdk";

//  --- BOB Account (SIGNER) ---
const BOB_ACCOUNTID = "0.0.5782085";
const BOB_PRIVATE_KEY = "";

// --- ALICE Account (PAYER) ---
const ALICE_ACCOUNTID = "0.0.1079726";
const ALICE_PRIVATE_KEY = "";

async function main() {
  //  --- BOB (SIGNER account) ---
  const bobPrivateKey = PrivateKey.fromStringED25519(BOB_PRIVATE_KEY);
  const bobAccountId = AccountId.fromString(BOB_ACCOUNTID);
  const bobClient = Client.forTestnet().setOperator(
    bobAccountId,
    bobPrivateKey
  );

  // --- ALICE (PAYER account) ---
  const alicePrivateKey = PrivateKey.fromStringED25519(ALICE_PRIVATE_KEY);
  const aliceAccountId = AccountId.fromString(ALICE_ACCOUNTID);
  const aliceClient = Client.forTestnet().setOperator(
    aliceAccountId,
    alicePrivateKey
  );

  // 1. Bob creates the transaction object (e.g. a `TokenCreateTransaction`) 
  // and sets a specific transactionId to designate Alice as the payer account 
  const transaction = new TokenCreateTransaction()
    .setTokenName("New Token 123")
    .setTokenSymbol("NT123")
    .setTokenType(TokenType.FungibleCommon)
    .setInitialSupply(2000)
    .setTreasuryAccountId(bobAccountId)
    .setTransactionId(TransactionId.generate(aliceAccountId)); // <--- New Line

  // 2. Bob freezes and signs the transaction
  const frozenTx = await transaction.freezeWith(bobClient);
  const signedTx = await frozenTx.sign(bobPrivateKey);

  // 3. Alice receives the signed transaction from Bob and adds her signature
  const doubleSignedTx = await signedTx.sign(alicePrivateKey);

  // 4. Alice executes the transaction and pays for the transaction fees
  const txResponse = await doubleSignedTx.execute(aliceClient);
  const receipt = await txResponse.getReceipt(aliceClient);
  console.log("TransactionId: " + txResponse.transactionId);
  console.log("Transaction status: " + receipt.status.toString());
  console.log("Created tokenId: " + receipt.tokenId);

  process.exit();
}

main();

您可以在这里看到结果，其中Alice(Account ID 0.0.1079726)是付款人帐户:https://hashscan.io/testnet/transaction/1698423106.148047003

希望能对某些人有所帮助！