Multisig Transaction Purpose Explainer

WHAT IT DOES

Multisig Transaction Purpose Explainer decodes and explains pending multisig transactions in plain English before you sign or vote. The tool takes the multisig contract address and transaction calldata, decodes the function signature to identify the operation (submitTransaction, confirmTransaction, executeTransaction, addOwner, removeOwner, changeRequirement, token transfers, approvals, and more), extracts the target address and parameters, and detects suspicious patterns including unlimited approvals, ownership changes, requirement changes, calls to unknown contracts, and large transfers. The tool then uses AI to generate a plain-language explanation of the transaction purpose: what the transaction does (which contract it calls, which function, and with what parameters), who proposed it, how many confirmations are needed, and whether it appears to be a routine operation or something unusual. Results include a risk level, function name, function signature, target address, value/amount, operation type, parameters, flags, and a comprehensive AI-generated explanation. The tool operates entirely read-only — no transactions are sent, no signatures are required. The AI explanation is designed to help you understand exactly what you are approving before you sign.

HOW TO USE

Connect your EVM wallet using the "Connect" button in the header. Select the network where the multisig contract is deployed from the dropdown menu. Enter the multisig contract address. Paste the transaction calldata (hex string starting with 0x) from the pending transaction — this is the data that encodes the transaction being proposed. Optionally enter the transaction nonce if you know it. Click "Explain transaction purpose" to begin the analysis. The tool decodes the calldata, extracts the function signature and parameters, detects suspicious patterns, and sends the data to the AI for a plain-English transaction purpose explanation. Results appear within seconds, showing the multisig contract, chain, risk level, function name, function signature, target address, value/amount, operation type, parameters, flags, and a comprehensive AI-generated explanation written in clear, conversational language.

CALLDATA DECODING AND SUSPICIOUS PATTERN DETECTION

The tool uses a signature-based decoding engine to analyze multisig transactions. It extracts the first 4 bytes of the calldata as the function signature and matches it against a database of known multisig and token function signatures — including submitTransaction (0x8b3820c0), confirmTransaction (0xda3c3d6a), revokeConfirmation (0xf2c9ecd8), executeTransaction (0xe20c9f71), addOwner (0x7bd703e8), removeOwner (0x0d5820a7), changeRequirement (0x44b1b8f9), approve (0x095ea7b3), transfer (0xa9059cbb), transferFrom (0x23b872dd), setApprovalForAll (0xa22cb465), and claim (0x2e7ba6ef). For each recognized signature, the tool identifies the operation type and attempts to extract the target address and amount from the calldata parameters. The tool also scans for dangerous patterns including unlimited approvals (max uint256), NFT approvals (setApprovalForAll), ownership changes, requirement changes, and transferFrom operations. The AI receives all decoded data and is prompted to explain the transaction purpose in plain language — stating what the transaction does, who proposed it, how many confirmations are needed, and whether it appears routine or suspicious. The AI is also instructed to state plainly what it cannot verify — that it decodes calldata and reads on-chain data, not the proposer's intent, off-chain context, or the legitimacy of the target contract.

WHAT IT CANNOT SEE

This tool cannot definitively verify the true intent of a multisig transaction — only decodes calldata and reads on-chain data. It cannot detect off-chain coordination or malicious intent not reflected in calldata — a transaction that appears benign in calldata could be part of a coordinated attack. The tool cannot predict whether the transaction will be approved or executed — it can only explain the transaction itself. Legitimate multisig transactions with complex calldata may be difficult to decode — the tool may not fully understand custom function signatures or complex parameter structures. The tool cannot detect if the multisig contract has been compromised. The tool cannot verify the legitimacy of the target contract. The tool cannot detect if the function signature corresponds to the intended behavior. The tool cannot predict the outcome of the transaction execution. The tool cannot detect off-chain governance processes or social context that might make a transaction more or less suspicious. The tool cannot detect if the multisig is being attacked through social engineering.

PLEASE NOTE

Multisig Transaction Purpose Explainer supports EVM-compatible chains only (Ethereum, BSC, Polygon, Arbitrum, Optimism, Avalanche, and others). The tool is read-only and never requests wallet signatures or transaction approvals. Transaction purpose explanations are AI-generated from calldata decoding — always verify the transaction details through the multisig contract's official interface and your wallet's transaction preview before signing. The AI explanation is for informational purposes only and does not constitute financial or legal advice. Never sign a multisig transaction you do not fully understand. Always double-check the target address, function, and parameters before approving.