Module slot_hashes

The most recent hashes of a slot’s parent banks.

The slot hashes sysvar provides access to the SlotHashes type.

The Sysvar::from_account_info and Sysvar::get methods always return ProgramError::UnsupportedSysvar because this sysvar account is too large to process on-chain. Thus this sysvar cannot be accessed on chain, though one can still use the SysvarId::id, SysvarId::check_id and Sysvar::size_of methods in an on-chain program, and it can be accessed off-chain through RPC.

Examples

Calling via the RPC client:

fn print_sysvar_slot_hashes(client: &RpcClient) -> Result<()> {
    let slot_hashes = client.get_account(&slot_hashes::ID)?;
    let data: SlotHashes = bincode::deserialize(&slot_hashes.data)?;

    Ok(())
}

Structs

PodSlotHash

A bytemuck-compatible (plain old data) version of SlotHash.

PodSlotHashes

API for querying of the SlotHashes sysvar by on-chain programs.

SlotHashes

SlotHashesSysvarDeprecated

API for querying the SlotHashes sysvar.

Constants

ID

The const program ID.

Traits

SysvarId

A type that holds sysvar data and has an associated sysvar Pubkey.

Functions

check_id

Returns true if given pubkey is the program ID.

id

Returns the program ID.