GASUB

Screenshots

Problem Statement

Our platform simplifies gas fee management by offering subscriptions represented as NFTs. Users can extend balances, update sponsored addresses, and manage gas fee coverage across chains. Cross-chain interoperability is powered by LayerZero’s OApp protocol, ensuring seamless updates for subscriptions across supported chains.

Solution

Built with Solidity, using OpenZeppelin ERC-721 for NFTs and Foundry for testing. The system integrates LayerZero for cross-chain updates and Account Abstraction for gas fee sponsorship. It features modular contracts (SubscriptionNFT, Paymaster, and Manager) for flexibility and extensibility.