Trait StorableAccounts

pub trait StorableAccounts<'a>: Sync {
    // Required methods
    fn account<Ret>(
        &self,
        index: usize,
        callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret,
    ) -> Ret;
    fn slot(&self, index: usize) -> Slot;
    fn target_slot(&self) -> Slot;
    fn len(&self) -> usize;

    // Provided methods
    fn account_default_if_zero_lamport<Ret>(
        &self,
        index: usize,
        callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret,
    ) -> Ret { ... }
    fn is_empty(&self) -> bool { ... }
    fn contains_multiple_slots(&self) -> bool { ... }
}

abstract access to pubkey, account, slot, target_slot of either: a. (slot, &[&Pubkey, &ReadableAccount]) b. (slot, &[&Pubkey, &ReadableAccount, Slot]) (we will use this later) This trait avoids having to allocate redundant data when there is a duplicated slot parameter. All legacy callers do not have a unique slot per account to store.

Required Methods

fn account<Ret>( &self, index: usize, callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret, ) -> Ret

account at ‘index’

fn slot(&self, index: usize) -> Slot

fn target_slot(&self) -> Slot

slot that all accounts are to be written to

fn len(&self) -> usize

accounts to write

Provided Methods

fn account_default_if_zero_lamport<Ret>( &self, index: usize, callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret, ) -> Ret

None if account is zero lamports

fn is_empty(&self) -> bool

true if no accounts to write

fn contains_multiple_slots(&self) -> bool

are there accounts from multiple slots only used for an assert

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.

Implementations on Foreign Types

impl<'a> StorableAccounts<'a> for (Slot, &'a [StakeReward])

allow StakeReward to be passed to StoreAccounts directly without copies or vec construction

fn account<Ret>( &self, index: usize, callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret, ) -> Ret

fn slot(&self, _index: usize) -> Slot

fn target_slot(&self) -> Slot

fn len(&self) -> usize

impl<'a: 'b, 'b> StorableAccounts<'a> for (Slot, &'b [(&'a Pubkey, &'a AccountSharedData)])

fn account<Ret>( &self, index: usize, callback: impl for<'local> FnMut(AccountForStorage<'local>) -> Ret, ) -> Ret

fn slot(&self, _index: usize) -> Slot

fn target_slot(&self) -> Slot

fn len(&self) -> usize

Implementors

impl<'a> StorableAccounts<'a> for StorableAccountsBySlot<'a>