# NativeUndelegateBuilder

Builds a native undelegate transaction to unstake CSPR from a validator.

## Import

```ts
import { NativeUndelegateBuilder, PublicKey } from 'casper-js-sdk';
```

## Usage

```ts
const transaction = new NativeUndelegateBuilder()
  .from(delegatorPublicKey)
  .validator(validatorPublicKey)
  .amount('500000000000')  // 500 CSPR to unstake
  .chainName('casper')
  .payment(2_500_000_000)
  .build();

transaction.sign(privateKey);
const result = await rpcClient.putTransaction(transaction);
```

## Methods

### .from(publicKey)

- **Type:** `PublicKey` - required

### .validator(publicKey)

- **Type:** `PublicKey` - required

The validator to unstake from.

### .amount(motes)

- **Type:** `BigNumber | string` - required

Amount to unstake in motes.

### .chainName(name)

- **Type:** `string` - required

## Notes

- After undelegating, there is an **unbonding period** of 7 eras (~14 hours) before funds are returned.
- During the unbonding period, the stake does not earn rewards.

## Related

- [`NativeDelegateBuilder`](/builders/NativeDelegateBuilder)
- [`NativeRedelegateBuilder`](/builders/NativeRedelegateBuilder)