///
/// Implementations that cannot find headers based on the hash should return a `Transient` error
/// when `height_hint` is `None`.
- fn get_header<'a>(&'a mut self, header_hash: &'a BlockHash, height_hint: Option<u32>) -> AsyncBlockSourceResult<'a, BlockHeaderData>;
+ fn get_header<'a>(&'a self, header_hash: &'a BlockHash, height_hint: Option<u32>) -> AsyncBlockSourceResult<'a, BlockHeaderData>;
/// Returns the block for a given hash. A headers-only block source should return a `Transient`
/// error.
- fn get_block<'a>(&'a mut self, header_hash: &'a BlockHash) -> AsyncBlockSourceResult<'a, Block>;
+ fn get_block<'a>(&'a self, header_hash: &'a BlockHash) -> AsyncBlockSourceResult<'a, Block>;
/// Returns the hash of the best block and, optionally, its height.
///
/// to allow for a more efficient lookup.
///
/// [`get_header`]: Self::get_header
- fn get_best_block<'a>(&'a mut self) -> AsyncBlockSourceResult<(BlockHash, Option<u32>)>;
+ fn get_best_block<'a>(&'a self) -> AsyncBlockSourceResult<(BlockHash, Option<u32>)>;
}
/// Result type for `BlockSource` requests.