Entrypoint

The only function in the entrypoint module is the entrypoint function. This module conforms to the standard Solana program structure and serves to call through to the process function in the process module; processor::process(program_id, accounts, instruction_data).

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