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 final_rent_epoch(&self, account_block: &[u8]) -> Epoch;
    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 final_rent_epoch(&self, account_block: &[u8]) -> Epoch

Returns the epoch that this account will next owe rent by parsing the specified account block. RENT_EXEMPT_RENT_EPOCH will be returned if the account is rent-exempt.

For a zero-lamport account, Epoch::default() will be returned to default states of an AccountSharedData.

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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.

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§