Trait fvm::kernel::IpldBlockOps

source ·

pub trait IpldBlockOps {
    // Required methods
    fn block_open(&mut self, cid: &Cid) -> Result<(BlockId, BlockStat)>;
    fn block_create(&mut self, codec: u64, data: &[u8]) -> Result<BlockId>;
    fn block_link(
        &mut self,
        id: BlockId,
        hash_fun: u64,
        hash_len: u32,
    ) -> Result<Cid>;
    fn block_read(
        &self,
        id: BlockId,
        offset: u32,
        buf: &mut [u8],
    ) -> Result<i32>;
    fn block_stat(&self, id: BlockId) -> Result<BlockStat>;
}

Expand description

The IPLD subset of the kernel.

Required Methods§

source

fn block_open(&mut self, cid: &Cid) -> Result<(BlockId, BlockStat)>

Open a block.

This method will fail if the requested block isn’t reachable.

source

fn block_create(&mut self, codec: u64, data: &[u8]) -> Result<BlockId>

Create a new block.

This method will fail if the block is too large (SPEC_AUDIT), the codec is not allowed (SPEC_AUDIT), the block references unreachable blocks, or the block contains too many links (SPEC_AUDIT).

source