Multi-Chain Gas Tank Top-Up Tool

WHAT IT DOES

This tool evaluates multi-chain gas tank top-up needs, helping users monitor and manage gas balances across multiple EVM chains. Given a gas tank contract address, a list of chain configurations (chain ID, RPC URL, native token symbol, and threshold), and an optional user address, it reads the user's native coin balance from each chain via RPC and from the gas tank contract. It then compares the balance against the configured threshold and determines if a top-up is needed. The tool displays a clear status for each chain—Need top-up, Low, or Ready—and provides a summary of chains requiring top-up. All data is pulled directly from the blockchain and RPC endpoints in real time, providing a transparent, comprehensive view of gas tank top-up requirements.

HOW TO USE

Connect your wallet using the Connect button in the header, or enter a user address manually. Select the target network from the dropdown—Ethereum Mainnet, Polygon, Optimism, Arbitrum One, Base, or Sepolia testnet. Enter the gas tank contract address. Enter each chain configuration on a separate line in the format: chainId,rpcUrl,nativeSymbol,threshold (e.g., "1,https://eth.llamarpc.com,ETH,0.01" for a 0.01 ETH threshold). Optionally, provide a user address (defaults to connected wallet). Click "Check gas levels." The tool will fetch the live balance from each chain's RPC and the contract balance. Results appear in the card below with a prominent top-up status badge (X chain(s) need top-up, Gas levels are low on some chains, or All chains have sufficient gas), a detailed list of each chain showing its balance, threshold, contract balance, and status, and a summary of chains and top-up needs. Use this information to identify which chains need gas top-up.

MULTI-CHAIN GAS TANK TOP-UP VERIFICATION WITH BALANCE AND THRESHOLD ANALYSIS

The tool provides comprehensive multi-chain gas tank top-up verification through multiple on-chain reads and RPC queries. First, it calls getGasBalances() on the gas tank contract with the user address and an array of chain IDs to retrieve all contract-stored gas balances in a single batch call. It then queries each chain's RPC endpoint using getBalance() to get the live native coin balance. The tool compares the live balance against the configured threshold—if the balance is below the threshold, the chain is marked as needing top-up. The needsTopUp() function provides the contract's own determination of top-up needs, and getTopUpAmount() returns the recommended top-up amount. The overall top-up status is determined by counting how many chains need top-up—any critical means action needed, low means monitoring recommended, and all ready means no action required. All factors are combined to provide a clear, actionable view of multi-chain gas tank top-up requirements with detailed per-chain analysis.

WHAT IT CANNOT SEE

This tool cannot guarantee top-up execution—on-chain conditions may change between the check and the top-up transaction. It cannot predict gas price movements or ensure that the top-up amount will be sufficient. It cannot verify off-chain top-up conditions or ensure that the gas tank contract is correctly configured. It cannot ensure bridge solvency or detect changes in bridge state that could affect top-ups. It cannot detect gas manipulation risks or ensure that gas prices are accurate. It cannot assure that the gas tank contract is free from vulnerabilities, bugs, or malicious code. It cannot verify that the gas tank contract address or chain configurations are correct. It cannot detect front-running or other execution risks. It cannot provide financial or legal advice or guarantee that topping up gas is safe. All data is provided as-is for informational purposes only; any reliance on the tool's output for top-up decisions is the sole responsibility of the user.

PLEASE NOTE

This tool supports EVM-compatible chains only: Ethereum Mainnet (1), Polygon (137), Optimism (10), Arbitrum One (42161), Base (8453), and Sepolia testnet (11155111). Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, and XRP are not supported. The tool requires a Web3 provider (MetaMask or WalletConnect) and access to RPC endpoints for the configured chains. It does not store any wallet data, chain configurations, or gas records. All queries are performed directly against the blockchain and RPC endpoints in real time. The tool only provides read-only information and does not execute any transactions. Gas balances and thresholds are contract-defined and RPC-derived values and do not guarantee top-up success. Always verify critical data independently through block explorers and consult with financial advisors before making any top-up decisions.