use solana_program::{ account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, pubkey::Pubkey, }; entrypoint!(process_instruction); #[allow(clippy::unnecessary_wraps)] fn process_instruction( _program_id: &Pubkey, accounts: &[AccountInfo], _instruction_data: &[u8], ) -> ProgramResult { let from = &accounts[0]; let to = &accounts[1]; let to_balance = to.lamports(); **to.lamports.borrow_mut() = to_balance + from.lamports(); **from.lamports.borrow_mut() = 0u64; Ok(()) }