Struct solana_program::rent::Rent

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#[repr(C)]
pub struct Rent { pub lamports_per_byte_year: u64, pub exemption_threshold: f64, pub burn_percent: u8, }

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§lamports_per_byte_year: u64

Rental rate

§exemption_threshold: f64

exemption threshold, in years

§burn_percent: u8

Implementations§

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impl Rent

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pub fn calculate_burn(&self, rent_collected: u64) -> (u64, u64)

calculate how much rent to burn from the collected rent

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pub fn minimum_balance(&self, data_len: usize) -> u64

minimum balance due for rent-exemption of a given size Account::data.len()

Note: a stripped-down version of this calculation is used in calculate_split_rent_exempt_reserve in the stake program. When this function is updated, – eg. when making rent variable – the stake program will need to be refactored

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pub fn is_exempt(&self, balance: u64, data_len: usize) -> bool

whether a given balance and data_len would be exempt

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pub fn due(&self, balance: u64, data_len: usize, years_elapsed: f64) -> RentDue

rent due on account’s data_len with balance

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pub fn due_amount(&self, data_len: usize, years_elapsed: f64) -> u64

rent due for account that is known to be not exempt

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pub fn free() -> Self

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pub fn with_slots_per_epoch(slots_per_epoch: u64) -> Self

Trait Implementations§

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impl AbiExample for Rent

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fn example() -> Self

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impl Clone for Rent

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Rent

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

Formats the value using the given formatter. Read more
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impl Default for Rent

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for Rent

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq<Rent> for Rent

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for Rent

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Sysvar for Rent

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fn get() -> Result<Self, ProgramError>

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fn size_of() -> usize

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fn from_account_info( account_info: &AccountInfo<'_> ) -> Result<Self, ProgramError>

Deserializes a sysvar from its AccountInfo. Read more
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fn to_account_info(&self, account_info: &mut AccountInfo<'_>) -> Option<()>

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impl SysvarId for Rent

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impl Copy for Rent

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impl StructuralPartialEq for Rent

Auto Trait Implementations§

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impl RefUnwindSafe for Rent

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impl Send for Rent

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impl Sync for Rent

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impl Unpin for Rent

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impl UnwindSafe for Rent

Blanket Implementations§

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impl<T> AbiEnumVisitor for Twhere T: Serialize + ?Sized,

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default fn visit_for_abi( &self, _digester: &mut AbiDigester ) -> Result<AbiDigester, DigestError>

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impl<T> AbiEnumVisitor for Twhere T: Serialize + AbiExample + ?Sized,

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default fn visit_for_abi( &self, digester: &mut AbiDigester ) -> Result<AbiDigester, DigestError>

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impl<T> AbiExample for T

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default fn example() -> T

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> DeserializeOwned for Twhere T: for<'de> Deserialize<'de>,