Function assert_delegate

programs/asset/program/src/utils.rs:31–59

(
    delegates: &[Option<&Delegate>],
    target: &Pubkey,
    role: DelegateRole,
)

#[allow(clippy::manual_try_fold)]
#[inline(always)]
pub fn assert_delegate(
    delegates: &[Option<&Delegate>],
    target: &Pubkey,
    role: DelegateRole,
) -> ProgramResult {
    delegates.iter().fold(
        Err(AssetError::DelegateNotFound.into()),
        |result, delegate| {
            if let Some(delegate) = delegate {
                require!(
                    *delegate.address == *target,
                    AssetError::InvalidDelegate,
                    "invalid delegate"
                );

                require!(
                    delegate.is_active(role),
                    AssetError::DelegateRoleNotActive,
                    "missing \"{:?}\" role",
                    role
                );

                Ok(())
            } else {
                result
            }
        },
    )
}

#[macro_export]
macro_rules! process_royalties {