Struct HopperCpiBuf 

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

Variable-data CPI builder – const accounts, runtime data length.

For instructions where data size isn’t known at compile time (e.g., Borsh-serialized arguments), but bounded by MAX.

Implementations

impl<'a, const ACCTS: usize, const MAX: usize> HopperCpiBuf<'a, ACCTS, MAX>

pub fn new(program_id: &'a Address) -> Self

Begin building a variable-data CPI call.

pub fn add_account( self, view: &'a AccountView, is_writable: bool, is_signer: bool, ) -> Self

Add an account.

pub fn write_data(self, src: &[u8]) -> Result<Self, ProgramError>

Write data into the buffer. Returns error if exceeds MAX.

pub fn invoke(&self) -> ProgramResult

Invoke without signer seeds.

pub fn invoke_signed(&self, seeds: &[&[&[u8]]]) -> ProgramResult

Invoke with PDA signer seeds.