Multi-Chain Wallet Tracker

WHAT IT DOES

The Multi-Chain Wallet Tracker is a read-only analytics tool that shows you wallet balances across multiple EVM chains in one place. Enter a wallet address and select the chains you want to monitor — Ethereum, Optimism, BNB Chain, Polygon, Fantom, Arbitrum, Avalanche, Base, and more. The app fetches the native token balance (ETH, BNB, MATIC, etc.), account nonce, and current block number for each selected chain. You can also paste a list of ERC-20 token contract addresses to fetch token balances, symbols, and decimals for the wallet on your currently connected chain. This is ideal for DeFi users, portfolio trackers, and anyone managing assets across multiple networks who wants a quick, consolidated view without opening separate block explorers.

HOW TO USE

1. Connect your wallet or enter the wallet address you want to track.

2. Select one or more chains from the dropdown (hold Ctrl/Cmd to select multiple).

3. Click "Track wallet" to fetch native balances, nonces, and block numbers for all selected chains.

4. Scroll down to the token holdings section.

5. Paste ERC-20 token contract addresses (one per line) into the text area.

6. Click "Fetch token balances" to retrieve balances, decimals, and symbols for those tokens on your currently selected/connected chain.

7. Review the results in the tables. Use "Clear" to reset all fields and results.

ONE TECHNICAL SECTION

This tool uses ethers v5's provider abstraction to connect to multiple chains simultaneously. For each chain selected, it instantiates a provider using either the connected wallet's provider (if the wallet is on that chain) or a fallback default provider with chain-specific RPC endpoints. The app then makes parallel balanceOf and getTransactionCount calls using Promise.all to ensure fast, concurrent fetching. For token balances, it uses the ERC-20 ABI's balanceOf, decimals, and symbol functions. The app handles errors gracefully per chain — if one RPC is rate-limited or down, the others continue to return results, and the error is displayed inline without blocking the entire operation. This parallel, fault-tolerant approach gives you a complete picture even when some chains are temporarily unavailable.

WHAT IT CANNOT SEE

This tool cannot track non-EVM chains such as Solana, Tron, Bitcoin, Cosmos, or any chain outside the EVM ecosystem. It cannot track off-chain activity or pending cross-chain bridges — it only reads on-chain data that has been finalized. It is limited by RPC availability and rate limits; if a provider is overloaded or blocks your request, the data may be incomplete or delayed. The tool cannot prove private key ownership or sign transactions — it is read-only and never requests signing. It cannot track token balances on chains that are not explicitly selected in the interface, nor can it detect tokens that do not implement the standard ERC-20 balanceOf method. It also cannot fetch historical balances or transaction

PLEASE NOTE

Sites and services change over time and this app may need updating to match.