Nonce Checker
Scan Solana addresses for durable nonce attack vectors
Inspired by the Drift exploit — detect suspicious nonce assignments on multisigs
What is a durable nonce attack?
Durable nonces on Solana allow transactions to be signed now and submitted later — they don't expire like regular transactions (which have ~60 second blockhash windows).
If an attacker compromises multisig signers, they can pre-sign transactions using durable nonces and execute them at any time. The nonce assignment to a multisig signer should be an immediate red flag.
This tool checks if a given address has any durable nonce accounts where it is the authority, which could indicate a potential attack vector — especially for multisig wallets.