AI Pre-Sign Transaction Explainer

WHAT IT DOES

This tool gives you a plain-language explanation of any Ethereum-compatible transaction before you authorize it. Paste a transaction hash, contract address, or ENS name, and it reads the on-chain data—target contract, function signature, parameters, and value—then presents a clear summary of what the transaction actually does. It flags common risk patterns like large value transfers, complex call data, high-balance interactions, and unusual function signatures. The AI layer translates raw call data into human-readable terms, so you know what you're approving before your wallet ever asks for a signature.

HOW TO USE

Connect your EVM wallet using the bridge—MetaMask or any WalletConnect-compatible wallet works. Select the network that matches the transaction you're investigating. Paste a transaction hash to decode its full call data and see an AI-generated explanation of its effect. Paste an address or ENS name to see a summary of that address's recent activity and balance, with risk indicators. The explanation appears in the results card, alongside any detected flags and a link to the block explorer for deeper inspection. No transaction is ever sent—this tool reads only, and your wallet's own signature prompt remains the sole gatekeeper for any real action.

TECHNICAL MECHANISM

The app uses the injected BGWallet bridge to access the EVM provider via ethers.js v5.7.2. It resolves ENS names through the provider's resolveName method, fetches transaction details via getTransaction, and reads balances and nonces through standard RPC calls. For address lookups, it retrieves the current balance and transaction count—on-chain state, not historical logs. The AI bridge (BGAI.generate) receives a prompt constructed from the actual data read from the chain: target address, value in ETH, function signature, raw call data, and transaction hash. The prompt is capped to fit within the model's context window and asks for a concise, plain-English explanation with risk flags. The result is rendered alongside the raw data, with a clear disclaimer that the AI explanation is generated and does not replace manual review. The wallet connector's connect and switchNetwork methods are wrapped in try/catch with user-facing error messages, ensuring failures like missing wallet extensions or network mismatches are visible rather than silent.

WHAT IT CANNOT SEE

This tool cannot detect malicious intent hidden in contract bytecode—it only reads the transaction data visible on-chain. It cannot verify off-chain consequences of a transaction, such as what a contract might do with tokens after receipt or whether the contract's owner can upgrade it later. It does not simulate transaction execution, so it cannot predict revert conditions or gas exhaustion. It cannot see your wallet's private keys or sign anything—the wallet bridge handles all signing separately. It does not access browser history, bookmarks, or other tabs. The AI explanation is generated from the data provided; it may miss nuanced attack vectors or social-engineering cues that are not present in the call data.

PLEASE NOTE

This tool supports EVM-compatible chains only—Ethereum, Sepolia, Polygon, Mumbai, Optimism, Arbitrum, and any other network the wallet bridge can connect to. Explanations are AI-generated and should be treated as assists, not authoritative audits. Always review the transaction details in your wallet's own signature prompt before approving. The wallet's signature step is the only protection that actually gates any action—this tool is informational and does not replace that safeguard. Free to use, no API keys required.