solana_accounts_db::tiered_storage::meta

Trait TieredAccountMeta

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pub trait TieredAccountMeta: Sized {

Show 16 methods    // Required methods
    fn new() -> Self;
    fn with_lamports(self, lamports: u64) -> Self;
    fn with_account_data_padding(self, padding: u8) -> Self;
    fn with_owner_offset(self, owner_offset: OwnerOffset) -> Self;
    fn with_account_data_size(self, account_data_size: u64) -> Self;
    fn with_flags(self, flags: &AccountMetaFlags) -> Self;
    fn lamports(&self) -> u64;
    fn account_data_padding(&self) -> u8;
    fn owner_offset(&self) -> OwnerOffset;
    fn flags(&self) -> &AccountMetaFlags;
    fn supports_shared_account_block() -> bool;
    fn rent_epoch(&self, _account_block: &[u8]) -> Option<Epoch>;
    fn account_hash<'a>(
        &self,
        _account_block: &'a [u8],
    ) -> Option<&'a AccountHash>;
    fn optional_fields_offset(&self, _account_block: &[u8]) -> usize;
    fn account_data_size(&self, _account_block: &[u8]) -> usize;
    fn account_data<'a>(&self, _account_block: &'a [u8]) -> &'a [u8] ⓘ;

}
Expand description

A trait that allows different implementations of the account meta that support different tiers of the accounts storage.

Required Methods§

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fn new() -> Self

Constructs a TieredAcountMeta instance.

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fn with_lamports(self, lamports: u64) -> Self

A builder function that initializes lamports.

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fn with_account_data_padding(self, padding: u8) -> Self

A builder function that initializes the number of padding bytes for the account data associated with the current meta.

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fn with_owner_offset(self, owner_offset: OwnerOffset) -> Self

A builder function that initializes the owner offset.

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fn with_account_data_size(self, account_data_size: u64) -> Self

A builder function that initializes the account data size. The size here represents the logical data size without compression.

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fn with_flags(self, flags: &AccountMetaFlags) -> Self

A builder function that initializes the AccountMetaFlags of the current meta.

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fn lamports(&self) -> u64

Returns the balance of the lamports associated with the account.

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fn account_data_padding(&self) -> u8

Returns the number of padding bytes for the associated account data

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fn owner_offset(&self) -> OwnerOffset

Returns the offset to the accounts’ owner in the current AccountsFile.

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fn flags(&self) -> &AccountMetaFlags

Returns the AccountMetaFlags of the current meta.

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fn supports_shared_account_block() -> bool

Returns true if the TieredAccountMeta implementation supports multiple accounts sharing one account block.

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fn rent_epoch(&self, _account_block: &[u8]) -> Option<Epoch>

Returns the epoch that this account will next owe rent by parsing the specified account block. None will be returned if this account does not persist this optional field.

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fn account_hash<'a>(&self, _account_block: &'a [u8]) -> Option<&'a AccountHash>

Returns the account hash by parsing the specified account block. None will be returned if this account does not persist this optional field.

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fn optional_fields_offset(&self, _account_block: &[u8]) -> usize

Returns the offset of the optional fields based on the specified account block.

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fn account_data_size(&self, _account_block: &[u8]) -> usize

Returns the length of the data associated to this account based on the specified account block.

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fn account_data<'a>(&self, _account_block: &'a [u8]) -> &'a [u8] ⓘ

Returns the data associated to this account based on the specified account block.

Object Safety§

This trait is not object safe.

Implementors§