import { Client, http, publicActions } from 'viem'
import { mainnet } from 'viem/chains'
 
const client = Client.create({
  chain: mainnet,
  transport: http(),
}).extend(publicActions())
 
const balance = await client.token.getBalance({
  account: '0x55FE002aefF02F77364de339a1292923A15844B8',
  token: 'usdc',
})
{ amount: 1000000000n, decimals: 6, formatted: '1000' }