toFunctionSelector

import { toFunctionSelector } from 'viem'

import { 
const toFunctionSelector: (fn: string | AbiFunction) => `0x${string}`
Returns the function selector for a given function definition.
toFunctionSelector } from 'viem'
 
const 
const selector_1: `0x${string}`
selector_1 = 
function toFunctionSelector(fn: string | AbiFunction): `0x${string}`
Returns the function selector for a given function definition.
toFunctionSelector('function ownerOf(uint256 tokenId)')
Output: 0x6352211e
 
const 
const selector_2: `0x${string}`
selector_2 = 
function toFunctionSelector(fn: string | AbiFunction): `0x${string}`
Returns the function selector for a given function definition.
toFunctionSelector('ownerOf(uint256)')
Output: 0x6352211e
 
// or from an `AbiFunction` on your contract ABI
const 
const selector_3: `0x${string}`
selector_3 = 
function toFunctionSelector(fn: string | AbiFunction): `0x${string}`
Returns the function selector for a given function definition.
toFunctionSelector({
  
name: string
name: 'ownerOf',
  
type: "function"
type: 'function',
  
inputs: readonly AbiParameter[]
inputs: [{ 
name: string
name: 'tokenId', 
type: "uint256"
type: 'uint256' }],
  
outputs: readonly AbiParameter[]
outputs: [],
  
stateMutability: AbiStateMutability
stateMutability: 'view',
})
Output: 0x6352211e