Trait IpfsBlockProvider 

pub trait IpfsBlockProvider: Send + Sync {
    // Required methods
    fn have(&self, multihash: &Multihash<32>) -> bool;
    fn get(&self, multihash: &Multihash<32>) -> Option<Vec<u8>>;
    fn changes(&self) -> Pin<Box<dyn Stream<Item = Change> + Send>>;
}

Provides blocks to be served over IPFS. Requires Send and Sync so we can write Arc<dyn BlockProvider> instead of Arc<dyn BlockProvider + Send + Sync>.

Required Methods

fn have(&self, multihash: &Multihash<32>) -> bool

Returns true if we have the block with the given hash.

fn get(&self, multihash: &Multihash<32>) -> Option<Vec<u8>>

Returns the block with the given hash if possible, otherwise returns None.

fn changes(&self) -> Pin<Box<dyn Stream<Item = Change> + Send>>

Returns a stream of changes to the available blocks. All blocks which are available at the point of calling will be reported as additions. Note that the stream may not be perfectly synchronised with have/get.

Implementors

impl<B, C> BlockProvider for IndexedTransactions<B, C>

where B: Block, C: BlockchainEvents<B> + BlockBackend<B> + Send + Sync + 'static,