# Transaction Builder

## TS SDK Transaction Builder <a href="#ts-sdk-transaction-builder" id="ts-sdk-transaction-builder"></a>

The SDK provides a simplified and meaningful transaction builder flow to handles the transaction creation lifecycle.

The transaction builder is separated to different namespaces for each transaction step in the transaction submission flow. Each namespace/step can be accessed by initiating the Endless class

* **build** - Build a raw transaction that can be signed and then submitted to chain
* **simulate** - Simulate a transaction before signing and submitting to chain
* **sign** - Sign a raw transaction to later submit to chain
* **submit** - Submit a transaction to chain

### Submit transaction <a href="#submit-transaction" id="submit-transaction"></a>

**Simple transaction**

```js
// build a transaction
const transaction = await endless.transaction.build.simple({
  sender: alice.accountAddress,
  data: {
    function: "0x1::endless_coin::transfer",
    typeArguments: [],
    functionArguments: [bob.accountAddress, 100],
  },
});

// using sign and submit separately
const senderAuthenticator = endless.transaction.sign({
  signer: alice,
  transaction,
});
const committedTransaction = await endless.transaction.submit.simple({
  transaction,
  senderAuthenticator,
});

// or using signAndSubmit combined
const committedTransaction = await endless.signAndSubmitTransaction({
  signer: alice,
  transaction,
});
```

### Simulate transaction <a href="#simulate-transaction" id="simulate-transaction"></a>

**Simple transaction**

```js
const transaction = await endless.transaction.build.simple({
  sender: alice.accountAddress,
  data: {
    function: "0x1::endless_coin::transfer",
    functionArguments: [bob.accountAddress, 100],
  },
});
const [userTransactionResponse] = await endless.transaction.simulate.simple({
  signerPublicKey: alice.publicKey,
  transaction,
});
```