ElderJS

import { eth_getElderMsgAndFeeTxRaw, eth_broadcastTx, eth_getElderAccountInfoFromSignature } from 'elderjs';
import { ethers } from "ethers";

function getWeb3Provider() {
    if (window.ethereum) {
        return new ethers.BrowserProvider(window.ethereum);
    }
    return null;
}
const provider = getWeb3Provider();

let message = "Sign to Login";
const signer = await provider.getSigner();
const signature = await signer.signMessage(message);
var { recoveredPublicKey, elderAddr } = await eth_getElderAccountInfoFromSignature(message, signature)

// Example transaction data
const tx = await DUMMY_CONTRACT.METHOD.populateTransaction();

const elderAddress = elderAddr;
const elderPublicKey = recoveredPublicKey;

const gasLimit = 21000;

const elderChainConfig = {
    chainName: "elder-testnet",
    rpc: "https://rpc.elder.example.com",
    rest: "https://rest.elder.example.com",
    rollChainID: 1234,
    
    // Elder Roll ID
    rollID: 2,
};

// Create and sign transaction
const { tx_hash, rawTx } = await eth_getElderMsgAndFeeTxRaw(
    tx,
    elderAddress,
    elderPublicKey,
    gasLimit,
    ethers.parseEther("1.0"),
    elderChainConfig
);

// Broadcast transaction
// broadcastResult.code == 0 (for tx success)
const broadcastResult = await eth_broadcastTx(rawTx, elderChainConfig.rpc);

console.log("Transaction Hash:", tx_hash);
console.log("Broadcast Result:", broadcastResult);

import { cosmos_getElderClient, cosmos_getElderMsgAndFeeTxRaw, getEthereumAddressFromCosmosCompressedPubKey } from 'elderjs';

// Elder chain configuration
const elderChainConfig = {
    chainName: "elder-testnet",
    rpc: "https://rpc.elder.example.com",
    rest: "https://rest.elder.example.com",
    rollChainID: 1234,
    
    // Elder Roll ID
    rollID: 2,
};

// Connect to Keplr and get client
const { elderAddress, elderClient, elderPublicKey } = await cosmos_getElderClient(elderChainConfig);
const ethAddress = getEthereumAddressFromCosmosCompressedPubKey(elderPublicKey);
  
// Example transaction data
const tx = await DUMMY_CONTRACT.METHOD.populateTransaction();

// Create and sign transaction
const { tx_hash, rawTx } = await cosmos_getElderMsgAndFeeTxRaw(
    tx,
    elderAddress,
    elderPublicKey,
    21000, // gasLimit
    ethers.parseEther("1.0"),
    1234, // rollChainId
    2, // ElderRollID
    "elder-testnet"  // chainName
);

// Broadcast transaction using the client
// broadcastResult.code == 0 (for tx success)
const broadcastResult = await elderClient.broadcastTx(rawTx);

console.log("Transaction Hash:", tx_hash);
console.log("Broadcast Result:", broadcastResult);