solana/programs/noop/src/lib.rs

use log::*;
use solana_sdk::account::KeyedAccount;
use solana_sdk::instruction::InstructionError;
use solana_sdk::pubkey::Pubkey;

solana_sdk::declare_program!(
    "Noop111111111111111111111111111111111111111",
    solana_noop_program,
    process_instruction
);

fn process_instruction(
    program_id: &Pubkey,
    keyed_accounts: &[KeyedAccount],
    data: &[u8],
) -> Result<(), InstructionError> {
    solana_logger::setup();
    trace!("noop: program_id: {:?}", program_id);
    trace!("noop: keyed_accounts: {:#?}", keyed_accounts);
    trace!("noop: data: {:?}", data);
    Ok(())
}