ERC2477 Token Metadata Integrity

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