useContractRead

Hook for calling an ethers Contract read-only method.

import { useContractRead } from 'wagmi'

Usage

The following examples use the wagmigotchi contract.

import { useContractRead } from 'wagmi'

function App() {
  const { data, isError, isLoading } = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
  })
}

Return Value

{
  data?: Result
  error?: Error
  isIdle: boolean
  isLoading: boolean
  isFetching: boolean
  isSuccess: boolean
  isError: boolean
  isFetched: boolean
  isRefetching: boolean
  refetch: (options: {
    throwOnError: boolean
    cancelRefetch: boolean
  }) => Promise<Result>
  status: 'idle' | 'error' | 'loading' | 'success'
}

Configuration

addressOrName

Contract address or ENS name.

import { useContract } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getSleep',
  })
}

contractInterface

Contract ABI in JSON or JS object format. An ethers Interface is also allowed.

import { useContract } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getSleep',
  })
}

functionName

Name of function to call.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getSleep',
  })
}

args (optional)

Arguments to pass to function call. Accepts any | any[].

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'love',
    args: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
  })
}

chainId (optional)

Force a specific chain id for the request. The wagmi Client's ethers provider must be set up as a chain-aware function for this to work correctly.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    chainId: 1,
  })
}

overrides (optional)

Overrides to pass to function call.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    overrides: { from: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e' },
  })
}

cacheOnBlock (optional)

Caches & persists the return data against the current block. Data will be considered stale when a new block arrives.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    cacheOnBlock: true,
  })
}

watch (optional)

Watches and refreshes data for new blocks.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    watch: true,
  })
}

cacheTime (optional)

Time (in ms) which the data should remain in the cache. Defaults to 0.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    cacheTime: 2_000,
  })
}

enabled (optional)

Set this to false to disable this query from automatically running. Defaults to true.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    enabled: false,
  })
}

isDataEqual (optional)

Determines if the data has changed or not. Defaults to deepEqual.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    isDataEqual: (prev, next) => prev === next,
  })
}

staleTime (optional)

Time (in ms) after data is considered stale. If set to Infinity the data will never be considered stale. Defaults to 0.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    staleTime: 2_000,
  })
}

select (optional)

Transform or select a part of the data returned by the contract.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    select: (data) => transform(data),
  })
}

suspense (optional)

Set this to true to enable suspense mode.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    suspense: true,
  })
}

onSuccess (optional)

Function to invoke when fetching new data is successful.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    onSuccess(data) {
      console.log('Success', data)
    },
  })
}

onError (optional)

Function to invoke when an error is thrown while fetching new data.

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    onError(error) {
      console.log('Error', error)
    },
  })
}

onSettled (optional)

Function to invoke when fetching is settled (either successfully fetched, or an error has thrown).

import { useContractRead } from 'wagmi'

function App() {
  const contractRead = useContractRead({
    addressOrName: '0xecb504d39723b0be0e3a9aa33d646642d1051ee1',
    contractInterface: wagmigotchiABI,
    functionName: 'getHunger',
    onSettled(data, error) {
      console.log('Settled', { data, error })
    },
  })
}