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,
}

Fields

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 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
) -> (u64, bool )

rent due on account’s data_len with balance

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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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fn clone(&self) -> Rent

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 ==. Read more

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

This method tests for !=.

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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>

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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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fn id() -> Pubkey

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fn check_id(pubkey: &Pubkey) -> bool

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impl Copy for Rent

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impl StructuralPartialEq for Rent

Auto Trait Implementations

impl RefUnwindSafe for Rent

impl Send for Rent

impl Sync for Rent

impl Unpin for Rent

impl UnwindSafe for Rent

Blanket Implementations

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

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

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

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pub 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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pub default fn example() -> T

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

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

pub 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

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

pub 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> Same<T> for T

type Output = T

Should always be Self

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

pub fn vzip(self) -> V

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Struct solana_program::rent::Rent

Fields

Implementations

impl Rent

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

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

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

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

pub fn free() -> Self

pub fn with_slots_per_epoch(slots_per_epoch: u64) -> Self

Trait Implementations

impl AbiExample for Rent

fn example() -> Self

impl Clone for Rent

fn clone(&self) -> Rent

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

impl Debug for Rent

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

impl Default for Rent

fn default() -> Self

impl<'de> Deserialize<'de> for Rent

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

impl PartialEq<Rent> for Rent

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

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

impl Serialize for Rent

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

impl Sysvar for Rent

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

fn size_of() -> usize

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

fn to_account_info(&self, account_info: &mut AccountInfo<'_>) -> Option<()>

impl SysvarId for Rent

fn id() -> Pubkey

fn check_id(pubkey: &Pubkey) -> bool

impl Copy for Rent

impl StructuralPartialEq for Rent

Auto Trait Implementations

impl RefUnwindSafe for Rent

impl Send for Rent

impl Sync for Rent

impl Unpin for Rent

impl UnwindSafe for Rent

Blanket Implementations

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

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

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

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

impl<T> AbiExample for T

pub default fn example() -> T

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

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

pub fn from(t: T) -> T

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

pub fn into(self) -> U

impl<T> Same<T> for T

type Output = T

impl<T> ToOwned for T where T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

pub fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

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

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

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

impl<V, T> VZip<V> for T where V: MultiLane<T>,

pub fn vzip(self) -> V

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

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

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

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

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

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

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

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

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

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

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

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

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