# TransactionEntryPoint

Specifies which entry point a transaction targets - built-in system entry points or a custom contract entry point.

## Import

```ts
import { TransactionEntryPoint, TransactionEntryPointEnum } from 'casper-js-sdk';
```

## Enum

### `TransactionEntryPointEnum`

| Value | Description |
|---|---|
| `Custom` | A custom contract entry point |
| `Transfer` | Native token transfer |
| `AddBid` | Add a validator bid |
| `WithdrawBid` | Withdraw a validator bid |
| `Delegate` | Delegate stake to a validator |
| `Undelegate` | Remove delegation |
| `Redelegate` | Move delegation to another validator |
| `ActivateBid` | Reactivate an inactive bid |
| `ChangeBidPublicKey` | Change a validator's public key |
| `Call` | Generic contract call |
| `AddReservations` | Add delegation reservations |
| `CancelReservations` | Cancel delegation reservations |

## Class

### `TransactionEntryPoint`

| Property | Type | Description |
|---|---|---|
| `type` | `TransactionEntryPointEnum` | Entry point type |
| `customEntryPoint?` | `string` | Entry point name for `Custom` type |

#### Constructor

```ts
new TransactionEntryPoint(
  type: TransactionEntryPointEnum,
  customEntryPoint?: string
)
```

#### Methods

```ts
ep.tag(): number          // Numeric tag (0–11)
ep.toBytes(): Uint8Array
ep.toJSON(): unknown
TransactionEntryPoint.fromJSON(json: any): TransactionEntryPoint
TransactionEntryPoint.fromBytes(bytes: Uint8Array): TransactionEntryPoint
```

## Usage

```ts
import { TransactionEntryPoint, TransactionEntryPointEnum } from 'casper-js-sdk';

// Native transfer
const transfer = new TransactionEntryPoint(TransactionEntryPointEnum.Transfer);

// Custom contract entry point
const custom = new TransactionEntryPoint(
  TransactionEntryPointEnum.Custom,
  'mint'
);

// Delegate
const delegate = new TransactionEntryPoint(TransactionEntryPointEnum.Delegate);
```

:::tip
Transaction builders like `NativeTransferBuilder` and `NativeDelegateBuilder` set the entry point automatically.
:::

## See Also

- [`TransactionV1Payload`](/types/transaction-v1-payload) - Contains `entryPoint`
- [Transaction Builders](/builders/introduction) - Set entry points automatically