Claim Staking Rewards

import { useMemo } from "react";
import { useParaCosmjsProtoSigner, useParaCosmjsSignAndBroadcast } from "@getpara/react-sdk/cosmos";
import { SigningStargateClient, coins } from "@cosmjs/stargate";
import { MsgWithdrawDelegatorReward } from "cosmjs-types/cosmos/distribution/v1beta1/tx";

const RPC_URL = "https://rpc.cosmos.directory/cosmoshub";

function ClaimRewards() {
  const { protoSigner, isLoading } = useParaCosmjsProtoSigner();

  const address = protoSigner?.address;

  const client = useMemo(
    () => protoSigner ? SigningStargateClient.connectWithSigner(RPC_URL, protoSigner) : undefined,
    [protoSigner]
  );

  const { signAndBroadcastAsync, isPending } = useParaCosmjsSignAndBroadcast(protoSigner, client);

  const claimStakingRewards = async () => {
    if (!protoSigner || !address) return;

    const validator = "cosmosvaloper1...";

    const msgWithdrawReward = {
      typeUrl: "/cosmos.distribution.v1beta1.MsgWithdrawDelegatorReward",
      value: MsgWithdrawDelegatorReward.fromPartial({
        delegatorAddress: address,
        validatorAddress: validator,
      }),
    };

    const fee = {
      amount: coins(5000, "uatom"),
      gas: "200000",
    };

    try {
      const result = await signAndBroadcastAsync({
        messages: [msgWithdrawReward],
        fee,
        memo: "Claiming rewards via Para",
      });

      console.log("Rewards claimed:", result.transactionHash);
      console.log("Gas used:", result.gasUsed);
    } catch (error) {
      console.error("Failed to claim rewards:", error);
    }
  };

  if (isLoading) return <div>Loading...</div>;

  return (
    <div>
      <p>Delegator: {address}</p>
      <button onClick={claimStakingRewards} disabled={isPending}>
        {isPending ? "Claiming..." : "Claim Rewards"}
      </button>
    </div>
  );
}