Execute custom messages and interact with Cosmos modules using CosmJS with Para wallets.

Prerequisites

Setup CosmJS Libraries

Execute Custom Messages

import { useCosmosClient } from "./useCosmosClient";
import { coins } from "@cosmjs/stargate";
import { MsgSend } from "cosmjs-types/cosmos/bank/v1beta1/tx";

function CustomTransaction() {
  const { signingClient } = useCosmosClient("https://rpc.cosmos.network");

  const executeCustomMessage = async () => {
    if (!signingClient) return;

    const accounts = await signingClient.signer.getAccounts();
    const sender = accounts[0].address;
    
    const msgSend = {
      typeUrl: "/cosmos.bank.v1beta1.MsgSend",
      value: MsgSend.fromPartial({
        fromAddress: sender,
        toAddress: "cosmos1...", // Replace with recipient
        amount: coins(1000000, "uatom"),
      }),
    };

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

    try {
      const result = await signingClient.signAndBroadcast(
        sender,
        [msgSend],
        fee,
        "Custom message via Para"
      );
      
      console.log("Transaction hash:", result.transactionHash);
      console.log("Code:", result.code);
    } catch (error) {
      console.error("Transaction failed:", error);
    }
  };

  return (
    <button onClick={executeCustomMessage}>Execute Custom Message</button>
  );
}

Next Steps