Struct HopperCpi 

pub struct HopperCpi<'a, const ACCTS: usize, const DATA: usize> { /* private fields */ }

Stack-allocated CPI call with compile-time-known account count and data size.

Both ACCTS and DATA are const generics – the compiler knows the exact buffer sizes at compile time, enabling optimal stack allocation and no runtime branching on sizes.

Implementations

impl<'a, const ACCTS: usize, const DATA: usize> HopperCpi<'a, ACCTS, DATA>

pub fn new(program_id: &'a Address) -> HopperCpi<'a, ACCTS, DATA>

Begin building a CPI call to program_id.

pub fn add_account( self, view: &'a AccountView, is_writable: bool, is_signer: bool, ) -> HopperCpi<'a, ACCTS, DATA>

Add an account to the CPI call.

Must be called exactly ACCTS times before invoke.

pub fn set_data(self, src: &[u8; DATA]) -> HopperCpi<'a, ACCTS, DATA>

Set the instruction data. Must be exactly DATA bytes.

pub fn set_data_from_slice( self, src: &[u8], ) -> Result<HopperCpi<'a, ACCTS, DATA>, ProgramError>

Write instruction data from a slice (must be exactly DATA bytes).

pub fn invoke(&self) -> Result<(), ProgramError>

Invoke the CPI without signer seeds.

pub fn invoke_signed(&self, seeds: &[&[&[u8]]]) -> Result<(), ProgramError>

Invoke the CPI with PDA signer seeds.