How do you implement multi-chain support in a DeFi wallet?

Problem Faced:
Many DeFi wallets support only one blockchain network, making it hard for users to manage multiple assets across different blockchains.

Solution:

• Use web3.js or ethers.js to connect to Ethereum-compatible chains (BSC, Polygon, Arbitrum, etc.).
• Implement blockchain RPC switching dynamically.
• Store supported chain IDs and RPC URLs in a config file.
• Use Cosmos SDK or Polkadot Substrate for non-EVM chains

javascript

const provider = new ethers.JsonRpcProvider("https://bsc-dataseed.binance.org/");
const wallet = new ethers.Wallet(PRIVATE_KEY, provider);
console.log("Wallet Address:", wallet.address);

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