useHasChainPermission

useHasChainPermission Hook¶

The useHasChainPermission hook lets you check whether a given blockchain address has the necessary permission by reading the on-chain state.

import React from "react";
import { useHasChainPermission } from "@redbellynetwork/eligibility-sdk";

const PermissionStatus: React.FC<{ userAddress: string }> = ({
  userAddress,
}) => {
  const { data, error, isLoading, refetch } =
    useHasChainPermission(userAddress);

  if (isLoading) return <p>Loading...</p>;
  if (error) return <p>Error: {error.message}</p>;

  return (
    <div>
      {data ? (
        <p>User {userAddress} is allowed.</p>
      ) : (
        <p>User {userAddress} is not allowed.</p>
      )}
    </div>
  );
};

export default PermissionStatus;

Parameters¶

• address The blockchain address to check for permission.

Return Value¶

The hook returns the object provided by useReadContract, which includes:

• data The response from the contract call. Typically, this is a boolean indicating if the address is allowed.

• isLoading A boolean that is true while the contract call is in progress.

• error An error object if the call fails; otherwise, undefined.

• refetch A function to manually trigger a re-fetch of the contract state.