nft_server

Trait MetadataGenerator

Source 
pub trait MetadataGenerator {
    type Error: Error + Send + Sync + 'static;

    // Required methods
    fn metadata_for<'life0, 'async_trait>(
        &'life0 self,
        token_id: U256,
    ) -> Pin<Box<dyn Future<Output = Result<Option<NftMetadata>, Self::Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn contract_metadata<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Option<ContractMetadata>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

A MetadataGenerator asynchronously generates token and contract Metadata. Tokens are referenced by the uint256 tokenId used to identify them in the ERC-721 contract.

A MetadataGenerator may query an outside API, a DB, the local filesystem, or any other potential data source. Projects seeking to use this library should make their own metadata generator

Required Associated Types§

Source

type Error: Error + Send + Sync + 'static

Associated Error type

Required Methods§

Source

fn metadata_for<'life0, 'async_trait>( &'life0 self, token_id: U256, ) -> Pin<Box<dyn Future<Output = Result<Option<NftMetadata>, Self::Error>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Generate metadata for a specific token

Source

fn contract_metadata<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Option<ContractMetadata>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Generate contract-level metadata (in the OpenSea format). See ContractMetadata.

This function returns an option, as contract metadata is not intended to be dynamically generated

Implementors§