Struct StatementAllowance 

pub struct StatementAllowance {
    pub max_count: u32,
    pub max_size: u32,
}

Per-account statement allowance: the resource budget an account may consume in the store.

The allowance is enforced on two axes at once — a maximum number of statements (max_count) and a maximum total data size in bytes (max_size). Because the binding constraint is primarily size, an account may spend its budget as either a few large statements or many small ones, up to whichever limit it hits first. When a submission would exceed either limit, the account’s lowest-priority statements are evicted to make room.

Allowances are not fixed in this crate: they are held in chain state under STATEMENT_ALLOWANCE_PREFIX (keyed by statement_allowance_key) and granted or revoked by the runtime via increase_allowance_by / decrease_allowance_by; the store reads the current value with get_allowance when validating a submission. An account with no allowance (or a depleted one) cannot store statements.

Fields

max_count: u32

Maximum number of statements allowed

max_size: u32

Maximum total size of statements in bytes

Implementations

impl StatementAllowance

pub fn new(max_count: u32, max_size: u32) -> Self

Create a new statement allowance.

pub const fn saturating_add(self, rhs: StatementAllowance) -> StatementAllowance

Saturating addition of statement allowances.

pub const fn saturating_sub(self, rhs: StatementAllowance) -> StatementAllowance

Saturating subtraction of statement allowances.

pub fn is_depleted(&self) -> bool

Returns true if the allowance is exhausted on either axis — that is, if max_count or max_size has reached zero.

Trait Implementations

impl Clone for StatementAllowance

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StatementAllowance

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Decode for StatementAllowance

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl DecodeWithMemTracking for StatementAllowance

impl Default for StatementAllowance

fn default() -> Self

Returns the “default value” for a type.

impl Encode for StatementAllowance

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl EncodeLike for StatementAllowance

impl Eq for StatementAllowance

impl PartialEq for StatementAllowance

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for StatementAllowance

impl TypeInfo for StatementAllowance

type Identity = StatementAllowance

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.