Trait LightProgramInterface 

pub trait LightProgramInterface: Sized {
    type Variant: Pack + Clone + Debug;
    type Instruction;
    type Error: Error;

    // Required methods
    fn program_id(&self) -> Pubkey;
    fn from_keyed_accounts(
        accounts: &[AccountInterface],
    ) -> Result<Self, Self::Error>;
    fn get_accounts_to_update(
        &self,
        ix: &Self::Instruction,
    ) -> Vec<AccountToFetch>;
    fn update(
        &mut self,
        accounts: &[AccountInterface],
    ) -> Result<(), Self::Error>;
    fn get_all_specs(&self) -> Vec<AccountSpec<Self::Variant>>;
    fn get_specs_for_instruction(
        &self,
        ix: &Self::Instruction,
    ) -> Vec<AccountSpec<Self::Variant>>;

    // Provided methods
    fn get_cold_specs(&self) -> Vec<AccountSpec<Self::Variant>> { ... }
    fn get_cold_specs_for_instruction(
        &self,
        ix: &Self::Instruction,
    ) -> Vec<AccountSpec<Self::Variant>> { ... }
    fn needs_loading(&self, ix: &Self::Instruction) -> bool { ... }
}

Trait for programs to give clients a unified API to load cold program accounts.

Required Associated Types

type Variant: Pack + Clone + Debug

The program’s interface account variant enum.

type Instruction

Program-specific instruction enum.

type Error: Error

Error type for SDK operations.

Required Methods

fn program_id(&self) -> Pubkey

The program ID.

fn from_keyed_accounts( accounts: &[AccountInterface], ) -> Result<Self, Self::Error>

Construct SDK from root account(s).

fn get_accounts_to_update(&self, ix: &Self::Instruction) -> Vec<AccountToFetch>

Returns pubkeys of accounts needed for an instruction.

fn update(&mut self, accounts: &[AccountInterface]) -> Result<(), Self::Error>

Update internal cache with fetched account data.

fn get_all_specs(&self) -> Vec<AccountSpec<Self::Variant>>

Get all cached specs.

fn get_specs_for_instruction( &self, ix: &Self::Instruction, ) -> Vec<AccountSpec<Self::Variant>>

Get specs filtered for a specific instruction.

Provided Methods

fn get_cold_specs(&self) -> Vec<AccountSpec<Self::Variant>>

Get only cold specs from all cached specs.

fn get_cold_specs_for_instruction( &self, ix: &Self::Instruction, ) -> Vec<AccountSpec<Self::Variant>>

Get only cold specs for a specific instruction.

fn needs_loading(&self, ix: &Self::Instruction) -> bool

Check if any accounts for this instruction are cold.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors