useToken

Hook for fetching ERC-20 token information.

import { useToken } from 'wagmi'

Usage#

The following examples use $UNI.

import { useContractEvent } from 'wagmi'

const App = () => {
  const [{ data, error, loading }, getToken] = useToken({
    address: '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984',
  })

  if (loading) return <div>Fetching token…</div>
  if (error) return <div>Error fetching token</div>
  return (
    <div>
      {data?.totalSupply?.formatted} {data?.symbol}
    </div>
  )
}

Return Values#

state#

{
  data?: {
    address: string
    decimals: number
    symbol: string
    totalSupply: {
      formatted: string
      value: BigNumber
    }
  }
  error?: Error
  loading?: boolean
}

watchToken#

(token: {
  address: string
  decimals?: number
  image?: string
  symbol: string
}) => Promise<boolean | Error>

getToken#

(config: { address: string; formatUnits?: string } = {}) => Promise<
  | {
      address: string
      decimals: number
      symbol: string
      totalSupply: {
        formatted: string
        value: BigNumber
      }
    }
  | Error
>

Configuration#

address#

Address of token.

import { useContractEvent } from 'wagmi'

const App = () => {
  const [{ data, error, loading }, getToken] = useToken({
    address: '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984',
  })

  return ...
}

formatUnits (optional)#

Formats balance using ethers.js units. Defaults to ether.

import { useContractEvent } from 'wagmi'

const App = () => {
  const [{ data, error, loading }, getToken] = useToken({
    address: '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984',
    formatUnits: 'gwei',
  })

  return ...
}

skip (optional)#

Skips automatically fetching data on mount. Defaults to false. Useful if you want to call getToken manually at some other point.

import { useContractEvent } from 'wagmi'

const App = () => {
  const [{ data, error, loading }, getToken] = useToken({
    address: '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984',
    skip: true,
  })

  return ...
}