Struct solana_program::rent::Rent

#[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

impl Rent

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

calculate how much rent to burn from the collected rent

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

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

whether a given balance and data_len would be exempt

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

rent due on account’s data_len with balance

pub fn free() -> Self

pub fn with_slots_per_epoch(slots_per_epoch: u64) -> Self

Trait Implementations

impl Clone for Rent

fn clone(&self) -> Rent

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Rent

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

Formats the value using the given formatter.

impl Default for Rent

fn default() -> Self

Returns the “default value” for a type.

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

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

Deserialize this value from the given Serde deserializer.

impl PartialEq<Rent> for Rent

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Serialize for Rent

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

Serialize this value into the given Serde 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