Certificate Registry
Certificate Registries are smart contracts that allow users to issue ERC-1155/ERC-1888 type of NFTs. Multiple Issuers can connect to the same Registry and issue NFTs on it.
Only a single Issuer (smart contract or blockchain account) can issue NFTs with a specific topic. Each topic can have a separate agreed-upon NFT metadata structure upon issuance.
Class Diagram
Source code: https://github.com/zerolabsgreen/tokenization/blob/develop/packages/contracts/contracts/CertificateRegistry.sol
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