Tags:[[NFT Standards]] [[draft]] [[Metadata new version]] [[Storing the data]] # Intro Interface ERC Defines mechanism by which clients (dapps) may verify that the token metadata has been delivered without unexpected manipulation. Has two functions: - tokenURIIntegrity - tokenURISchemaIntegrity Which defines how to add tokenURIIntegrity to metadata which is then added to Schema ## Solving problem URLs (Uniform Resource Locators) provides no guarantees of storing metadata. This standard is providing access to assets on-chain. ## Standards that allows attaching metadata to specific tokens using URI: - [[ERC721]] metadata extension (`ERC721Metadata`) - [[ERC1155]] metadata extension (`ERC1155Metadata_URI`) - [[EIP1046 Metadata extension]] (DRAFT) ERC-20 Metadata Extension # [[further reading]] Full implementation: https://eips.ethereum.org/EIPS/eip-2477 Discussion: https://github.com/ethereum/EIPs/issues/2483