Nonce Checker

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.