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pub use crate::rent::Rent;
use crate::{
account::{Account, KeyedAccount},
instruction::InstructionError,
sysvar::Sysvar,
};
crate::declare_sysvar_id!("SysvarRent111111111111111111111111111111111", Rent);
impl Sysvar for Rent {}
pub fn create_account(lamports: u64, rent: &Rent) -> Account {
rent.create_account(lamports)
}
pub fn verify_rent_exemption(
account: &KeyedAccount,
rent_sysvar_account: &KeyedAccount,
) -> Result<(), InstructionError> {
let rent = Rent::from_keyed_account(rent_sysvar_account)?;
if !rent.is_exempt(account.account.lamports, account.account.data.len()) {
Err(InstructionError::InsufficientFunds)
} else {
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_rent_create_account() {
let lamports = 42;
let account = create_account(lamports, &Rent::default());
let rent = Rent::from_account(&account).unwrap();
assert_eq!(rent, Rent::default());
}
}