# `Selectors`

Generated Tempo precompile function selectors.

:::warning
This API is experimental and may change in future releases.
:::

## Usage

Use `Selectors` when you need the `bytes4` selector for a Tempo precompile function, or when building
typed access-key scopes with [`Scopes.contract`](/tempo/utilities/Scopes#scopescontract).

### TIP-20 Selector

```ts twoslash
import { Selectors } from 'viem/tempo'

const selector = Selectors.tip20.transfer
//    ^? const selector: "0xa9059cbb"
```

### Overloaded Selector

Some precompile functions are overloaded. For those functions, the selector is keyed by full
function signature.

```ts twoslash
import { Selectors } from 'viem/tempo'

const selector = Selectors.tip20Factory.createToken[
  'createToken(string,string,string,address,address,bytes32,string)'
]
//    ^? const selector: "0x5323d222"
```

### Access-Key Scope Builder

```ts twoslash
import { Scopes, Selectors } from 'viem/tempo'

const tip20 = Scopes.contract(
  '0x20c0000000000000000000000000000000000001',
  Selectors.tip20,
)

const scope = tip20.transfer({
  recipients: ['0xcafebabecafebabecafebabecafebabecafebabe'],
})
```

## Return Type

Selector values are hex strings.

```ts
type Selector = Hex
```

Selector maps are grouped by Tempo precompile.

```ts
type SelectorMap = Record<string, Selector | Record<string, Selector>>
```

## Exports

```ts
import { Selectors } from 'viem/tempo'

Selectors.accountKeychain
Selectors.addressRegistry
Selectors.nonce
Selectors.receivePolicyGuard
Selectors.signatureVerifier
Selectors.stablecoinDex
Selectors.tip20
Selectors.tip20ChannelReserve
Selectors.tip20Factory
Selectors.tip403Registry
Selectors.feeManager
Selectors.feeAmm
Selectors.validatorConfig
Selectors.validatorConfigV2
```