Claim Staking Rewards

import { View, Text, Button } from 'react-native';
import { useParaCosmos } from './hooks/useParaCosmos';
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, address, isLoading } = useParaCosmos();

  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 client = await SigningStargateClient.connectWithSigner(RPC_URL, protoSigner);

      const result = await client.signAndBroadcast(
        address,
        [msgWithdrawReward],
        fee,
        '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 <Text>Loading...</Text>;

  return (
    <View>
      <Text>Delegator: {address}</Text>
      <Button title="Claim Rewards" onPress={claimStakingRewards} />
    </View>
  );
}