sign-transaction.js

import {
    Client,
    PrivateKey,
    AccountCreateTransaction,
    Hbar,
    AccountId,
    KeyList,
    TransferTransaction,
} from "@hashgraph/sdk";

import * as dotenv from "dotenv";

dotenv.config();

let user1Key;
let user2Key;

async function main() {
    let client;

    try {
        client = Client.forName(process.env.HEDERA_NETWORK).setOperator(
            AccountId.fromString(process.env.OPERATOR_ID),
            PrivateKey.fromString(process.env.OPERATOR_KEY)
        );
    } catch (error) {
        throw new Error(
            "Environment; variables HEDERA_NETWORK, OPERATOR_ID, and OPERATOR_KEY are required."
        );
    }

    user1Key = PrivateKey.generate();
    user2Key = PrivateKey.generate();

    // create a multi-sig account
    const keyList = new KeyList([user1Key, user2Key]);

    const createAccountTransaction = new AccountCreateTransaction()
        .setInitialBalance(new Hbar(2)) // 5 h
        .setKey(keyList);

    const response = await createAccountTransaction.execute(client);

    let receipt = await response.getReceipt(client);

    console.log(`account id = ${receipt.accountId.toString()}`);

    // create a transfer from new account to 0.0.3
    const transferTransaction = new TransferTransaction()
        .setNodeAccountIds([new AccountId(3)])
        .addHbarTransfer(receipt.accountId, -1)
        .addHbarTransfer("0.0.3", 1)
        .freezeWith(client);

    await transferTransaction.signWithOperator(client);
    user1Key.signTransaction(transferTransaction);
    user2Key.signTransaction(transferTransaction);

    const result = await transferTransaction.execute(client);
    receipt = await result.getReceipt(client);

    console.log(receipt.status.toString());
}

void main();