# Versioned Transactions

***Github repository:*** [***https://github.com/zetamarkets/sdk/tree/main/examples/versioned-txes***](https://github.com/zetamarkets/sdk/tree/main/examples/versioned-txes)

Advanced Solana features help you get more out of your code. This example uses Address Lookup Tables (ALTs), a feature of Solana's new Versioned Transactions, to stack multiple placeOrder instructions into a single transaction. Sandwiching instructions is quite limited without ALTs as you'll quickly run into resource and account limits.

<details>

<summary>Code</summary>

```typescript
require("dotenv").config();

import {
  Wallet,
  CrossClient,
  Exchange,
  Network,
  utils,
  types,
  assets,
  constants,
} from "@zetamarkets/sdk";
import { PublicKey, Connection, Keypair, Transaction } from "@solana/web3.js";
import fetch from "node-fetch";

const NETWORK_URL = process.env["network_url"]!;
const SERVER_URL = process.env["server_url"];
const STARTING_BALANCE = 10_000;
const ASSETS = [constants.Asset.SOL, constants.Asset.ARB, constants.Asset.APT];
const USER_KEY = Keypair.generate();
const WALLET = new Wallet(USER_KEY);
const CONNECTION: Connection = new Connection(NETWORK_URL, "confirmed");

const MAX_SINGLE_MARKET_PLACE_ORDER_IXS = 6;
const MAX_ALL_PERP_MARKET_PLACE_ORDER_IXS = 6;

async function main() {
  // Airdropping SOL.
  await CONNECTION.requestAirdrop(WALLET.publicKey, 1_000_000_000);

  await fetch(`${SERVER_URL}/faucet/USDC`, {
    method: "post",
    body: JSON.stringify({
      key: WALLET.publicKey.toString(),
      amount: 10_000,
    }),
    headers: { "Content-Type": "application/json" },
  });

  const loadExchangeConfig = types.defaultLoadExchangeConfig(
    Network.DEVNET,
    CONNECTION,
    utils.defaultCommitment(),
    0, // ThrottleMs - increase if you are running into rate limit issues on startup.
    true
  );

  await Exchange.load(loadExchangeConfig);

  const client = await CrossClient.load(
    CONNECTION,
    WALLET,
    undefined,
    undefined,
    undefined,
    undefined,
    true
  );

  console.log("client loaded:", client.publicKey.toBase58());

  await client.deposit(utils.convertDecimalToNativeInteger(STARTING_BALANCE));

  await utils.sleep(500);

  console.log(
    `User margin acc balance: ${
      Exchange.riskCalculator.getCrossMarginAccountState(client.account!)
        .balance
    }`
  );

  await Promise.all(
    ASSETS.map(async (asset) => {
      return client.initializeOpenOrdersAccount(asset);
    })
  );

  await Promise.all(
    ASSETS.map(async (asset) => {
      let singleMarketTx = new Transaction();
      for (let i = 0; i < MAX_SINGLE_MARKET_PLACE_ORDER_IXS; i++) {
        singleMarketTx.add(
          client.createPlacePerpOrderInstruction(
            asset,
            utils.convertDecimalToNativeInteger((i + 1) / 100),
            utils.convertDecimalToNativeLotSize(1),
            types.Side.BID
          )
        );
      }

      await utils.processTransaction(
        client.provider,
        singleMarketTx,
        undefined,
        undefined,
        undefined,
        utils.getZetaLutArr()
      );
    })
  );

  await utils.sleep(2000);

  ASSETS.forEach((asset) => {
    console.log(
      `client has ${client.getOrders(asset).length} orders on ${asset}`
    );
  });

  await client.cancelAllMarketOrders();
  let multiMarketTx = new Transaction();

  for (let i = 0; i < MAX_ALL_PERP_MARKET_PLACE_ORDER_IXS; i++) {
    multiMarketTx.add(
      client.createPlacePerpOrderInstruction(
        ASSETS[0],
        utils.convertDecimalToNativeInteger((i + 1) / 100),
        utils.convertDecimalToNativeLotSize(0.01),
        types.Side.BID
      )
    );
  }

  await utils.processTransaction(
    client.provider,
    multiMarketTx,
    undefined,
    undefined,
    undefined,
    utils.getZetaLutArr()
  );

  await utils.sleep(2000);

  ASSETS.forEach((asset) => {
    console.log(
      `client has ${client.getOrders(asset).length} orders on ${asset}`
    );
  });

  await Exchange.close();
  await client.close();
}

main().catch(console.error.bind(console));
```

</details>


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