use solana_sdk::{
    instruction::{AccountMeta, Instruction},
    pubkey::Pubkey,
};

/// Legacy symbols from Memo v1
pub mod v1 {
    solana_sdk::declare_id!("Memo1UhkJRfHyvLMcVucJwxXeuD728EqVDDwQDxFMNo");
}

solana_sdk::declare_id!("MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr");

/// Build a memo instruction, possibly signed
///
/// Accounts expected by this instruction:
///
///   0. ..0+N. `[signer]` Expected signers; if zero provided, instruction will be processed as a
///     normal, unsigned spl-memo
///
pub fn build_memo(memo: &[u8], signer_pubkeys: &[&Pubkey]) -> Instruction {
    Instruction {
        program_id: id(),
        accounts: signer_pubkeys
            .iter()
            .map(|&pubkey| AccountMeta::new_readonly(*pubkey, true))
            .collect(),
        data: memo.to_vec(),
    }
}