useReadContract()

Use it to read a smart contract state via JSON-RPC.

INFO

The built-in chain configurations default to using the hashio.io JSON-RPC relay.

Usage

import { ContractId } from "@hashgraph/sdk";
import { useReadContract } from '@buidlerlabs/hashgraph-react-wallets'
import { counterABI } from './ABIs'

const CONTRACT_ID = ContractId.fromString("0.0.123456");

const App = () => {
  const { readContract } = useReadContract();

  const handleGetCount = async () => {
    try {
      const count = await readContract({
        address: `0x${CONTRACT_ID.toSolidityAddress()}`,
        abi: counterABI,
        functionName: 'get',
      })

      console.log(Number(count))
    } catch (e) {
      console.error(e)
    }
  }

  return <button onClick={handleGetCount}>Get count</button>

Parameters

interface IUseWriteContractProps<Connector> {
  connector?: Connector | null
  chain?: Chain
}

WARNING

By default, this implementation uses the chain configuration of the currently connected wallet. To use it without a connected wallet, specify the chain parameter in the configuration.

- connector

• Type: HWBridgeConnector
• Required: false

- chain

• Type: Chain
• Required: false

readContract()

Read more about its usage on viem.sh

Return Type

// import { createPublicClient } from 'viem'

type TResult = {
  readContract: async <
    readParameters extends Parameters<ReturnType<typeof createPublicClient>['readContract']>[0],
  >(
    parameters: readParameters,
  ): Promise<TData>
}