# Struct solana_program::rent::Rent

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

Configuration of network rent.

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§`lamports_per_byte_year: u64`

Rental rate in lamports/byte-year.

§`exemption_threshold: f64`

Amount of time (in years) a balance must include rent for the account to be rent exempt.

§`burn_percent: u8`

The percentage of collected rent that is burned.

Valid values are in the range [0, 100]. The remaining percentage is distributed to validators.

## 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.

The first value returned is the amount burned. The second is the amount to distribute to validators.

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

Minimum balance due for rent-exemption of a given account data size.

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

Whether a given balance and data length 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 length 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

Creates a `Rent` that charges no lamports.

This is used for testing.

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#### pub fn with_slots_per_epoch(slots_per_epoch: u64) -> Self

Creates a `Rent` that is scaled based on the number of slots in an epoch.

This is used for testing.

## Trait Implementations§

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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 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 size_of() -> usize

The size in bytes of the sysvar as serialized account data.
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#### fn from_account_info( account_info: &AccountInfo<'_>, ) -> Result<Self, ProgramError>

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

Serializes the sysvar to `AccountInfo`. Read more
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### impl SysvarId for Rent

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#### fn id() -> Pubkey

The `Pubkey` of the sysvar.
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#### fn check_id(pubkey: &Pubkey) -> bool

Returns `true` if the given pubkey is the program ID.
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## Blanket Implementations§

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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>,

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#### 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> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T> Pointable for T

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#### const ALIGN: usize = _

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

Performs the conversion.
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