Chain-Agnostic Transaction Signer Tool

WHAT IT DOES

This tool evaluates chain-agnostic transaction signer readiness, helping developers and users determine if a transaction can be signed across multiple EVM chains using a unified signer interface. Given a signer contract address, a list of chain configurations (chain ID, RPC URL, chain name), transaction data (JSON with to, data, and value), and an optional user address, it reads the user's nonce for each chain, whether the transaction can be signed, whether it has already been signed, and the signer count. The tool then displays a clear status for each chain—Ready to sign, Already signed, or Pending (cannot sign)—and provides a summary of chains where signing is possible. All data is pulled directly from the blockchain and RPC endpoints in real time, providing a transparent, comprehensive view of chain-agnostic transaction signer readiness.

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 signer contract address. Enter each chain configuration on a separate line in the format: chainId,rpcUrl,chainName (e.g., "1,https://eth.llamarpc.com,Ethereum"). Enter the transaction data as JSON with at least a "to" field (e.g., {"to":"0x...","data":"0x...","value":"0"}). Optionally, provide a user address (defaults to connected wallet). Click "Check signer." The tool will fetch the nonce, canSign status, isSigned status, and signer count for each chain. Results appear in the card below with a prominent signer status badge (X chain(s) ready to sign, Transaction already signed, or No chains ready for signing), a detailed list of each chain showing its nonce, canSign status, isSigned status, and signer count, and a summary of chains and signing readiness. Use this information to identify which chains support transaction signing.

CHAIN-AGNOSTIC TRANSACTION SIGNER VERIFICATION WITH NONCE AND STATUS ANALYSIS

The tool provides comprehensive chain-agnostic transaction signer verification through multiple on-chain reads. First, it calls getNonce() for each chain to retrieve the user's current nonce from the signer contract. It then calls canSign() to check if the transaction can be signed on that chain, passing the user address, chain ID, and encoded transaction data. The isSigned() function checks if the transaction has already been signed for that chain by computing a transaction hash from the data and chain ID. The getSignerCount() function returns the total number of signers authorized for the user. The signing status is determined by checking isSigned first—Signed if true, Ready if canSign is true, Pending otherwise. The overall signing status is summarized by counting chains ready to sign—Ready if any are ready, Signed if all are already signed, Pending otherwise. All factors are combined to provide a clear, actionable view of chain-agnostic transaction signer readiness with detailed per-chain analysis.

WHAT IT CANNOT SEE

This tool cannot guarantee transaction signing success—on-chain conditions may change between the check and the signing transaction. It cannot predict transaction ordering or ensure that the signature will be accepted. It cannot verify off-chain signature conditions or ensure that the signer contract is correctly configured. It cannot detect signature manipulation risks or ensure that signatures are securely handled. It cannot ensure transaction execution or detect front-running. It cannot assure that the signer contract is free from vulnerabilities, bugs, or malicious code. It cannot verify that the signer contract address or chain configurations are correct. It cannot detect front-running or other execution risks. It cannot provide legal or financial advice or guarantee that signing transactions is safe. All data is provided as-is for informational purposes only; any reliance on the tool's output for signing 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 signing 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. Nonces, canSign statuses, and signing readiness are contract-defined and RPC-derived values and do not guarantee signing success. Always verify critical data independently through block explorers and consult with developers before making any signing decisions.