# WithdrawalSenderTag.from

Derives the sender tag that identifies the indexed parent-chain `WithdrawalProcessed` event for a Zone withdrawal.

The `transactionHash` is the Zone transaction containing the `ZoneOutbox.requestWithdrawal` call. The protocol defines a user withdrawal sender tag as `keccak256(abi.encodePacked(sender, transactionHash, fallbackNonce))`. Internal deposit bounce-backs use the canonical zero-sender tag derived from `address(0)` and `bytes32(0)` without a fallback nonce.

[Authenticated Withdrawals Specification](https://github.com/tempoxyz/zones/blob/main/specs/spec.md#authenticated-withdrawals)

## Imports

:::code-group
```ts [Named]
import { WithdrawalSenderTag } from 'ox/tempo'
```

```ts [Entrypoint]
import * as WithdrawalSenderTag from 'ox/tempo/WithdrawalSenderTag'
```
:::

## Examples

```ts twoslash
import { WithdrawalSenderTag } from 'ox/tempo'

const senderTag = WithdrawalSenderTag.from({
  fallbackNonce: 19n,
  sender: '0x1234567890abcdef1234567890abcdef12345678',
  transactionHash:
    '0xabababababababababababababababababababababababababababababababab'
})
```

## Definition

```ts
function from(
  value: from.Value,
): Hex.Hex
```

**Source:** [src/tempo/WithdrawalSenderTag.ts](https://github.com/wevm/ox/blob/main/src/tempo/WithdrawalSenderTag.ts#L34)

## Parameters

### value

* **Type:** `from.Value`

Withdrawal sender, Zone transaction hash, and fallback nonce.

#### value.fallbackNonce

* **Type:** `bigint`

Public nonce assigned to the withdrawal's private fallback recipient.

#### value.sender

* **Type:** `abitype_Address`

Address that requested the withdrawal.

#### value.transactionHash

* **Type:** `0x${string}`

Hash of the Zone transaction containing `ZoneOutbox.requestWithdrawal`.

## Return Type

The sender tag.

`Hex.Hex`