INTRODUCTION

0xEssential provides open-source software and permissionless services that allow developers to deploy Layer 2 contracts that depend on trust-minimized Layer 1 NFT ownership data.

Instead of users bridging NFTs between chains to use them in games or other contracts, 0xEssential's approach uses meta-transactions and trust-minimized offchain data fetching based on EIP standards to offer a superior developer and user experience.

dApp developers can use our client SDK to gather EIP-712 meta-transaction signatures from users. Those signatures must be routed through a relaying service backend - we provide deploy-ready OSS for this step, but developers are responsible for providing infrastructure - your own backend, or a SAAS service like OpenZeppelin Defender.

The relayer can call 0xEssential's deployed EssentialForwarder contract, or developers may deploy their own version. NFT ownership data is fetched via EIP-3668 OffchainLookup - 0xEssential provides an open and standards based HTTPS RPC API that integrates with our OSS contract and relayer.

Finally, developers must inherit our EssentialERC7221Context primitive in their implementation contract. This allows the contract developer to use _msgSender() and _msgNFT() functions to get verified data about the L1 NFT being used and its owner inside their Layer 2 contract functions....