Module clock

Information about the network’s clock, ticks, slots, etc.

The clock sysvar provides access to the Clock type, which includes the current slot, the current epoch, and the approximate real-world time of the slot.

Clock implements Sysvar::get and can be loaded efficiently without passing the sysvar account ID to the program.

See also the Solana documentation on the clock sysvar.

Examples

Accessing via on-chain program directly:

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {

    let clock = Clock::get()?;
    msg!("clock: {:#?}", clock);

    Ok(())
}

Accessing via on-chain program’s account parameters:

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    let account_info_iter = &mut accounts.iter();
    let clock_account_info = next_account_info(account_info_iter)?;

    assert!(clock::check_id(clock_account_info.key));

    let clock = Clock::from_account_info(clock_account_info)?;
    msg!("clock: {:#?}", clock);

    Ok(())
}

Accessing via the RPC client:

fn print_sysvar_clock(client: &RpcClient) -> Result<()> {
    let clock = client.get_account(&clock::ID)?;
    let data: Clock = bincode::deserialize(&clock.data)?;

    Ok(())
}

Re-exports

• pub use crate::clock::Clock;

Constants

• ID
  The const program ID.

Functions

• check_id
  Returns true if given pubkey is the program ID.
• id
  Returns the program ID.