Permit2 Nonce Finder

Context

This contract is designed to help you work with Permit2 signatures.

When using Permit2, you should pick nonces sequentially to minimize gas cost.

At Flood we're building a one-signature trading experience. Finding nonces offchain is annoying and can be slow, so we developed Permit2NonceFinder to discover the next available nonce in a single RPC call.

Happy signing 🫡

Usage

This contract is supposed to be used off-chain to find the first consumable nonce for a given owner.

• nextNonce(address owner) finds the first available nonce for owner
• nextNonceAfter(address owner, uint start) finds the first available nonce for owner after start. Use this if you're signing multiple nonces at once.

Deployment Address

Permit2NonceFinder is deployed on Mainnet and Arbitrum at 0xf100Df4CA9bF942878888c1F05010F1823E5Dc73