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use {
crate::error::FarmError,
arrayref::array_ref,
solana_program::{hash::Hasher, msg, program_error::ProgramError, pubkey::Pubkey},
std::fmt::Display,
};
pub fn checked_add<T>(arg1: T, arg2: T) -> Result<T, ProgramError>
where
T: num_traits::PrimInt + Display,
{
if let Some(res) = arg1.checked_add(&arg2) {
Ok(res)
} else {
msg!("Error: Overflow in {} + {}", arg1, arg2);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_sub<T>(arg1: T, arg2: T) -> Result<T, ProgramError>
where
T: num_traits::PrimInt + Display,
{
if let Some(res) = arg1.checked_sub(&arg2) {
Ok(res)
} else {
msg!("Error: Overflow in {} - {}", arg1, arg2);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_div<T>(arg1: T, arg2: T) -> Result<T, ProgramError>
where
T: num_traits::PrimInt + Display,
{
if let Some(res) = arg1.checked_div(&arg2) {
Ok(res)
} else {
msg!("Error: Overflow in {} / {}", arg1, arg2);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_mul<T>(arg1: T, arg2: T) -> Result<T, ProgramError>
where
T: num_traits::PrimInt + Display,
{
if let Some(res) = arg1.checked_mul(&arg2) {
Ok(res)
} else {
msg!("Error: Overflow in {} * {}", arg1, arg2);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_pow<T>(arg: T, exp: usize) -> Result<T, ProgramError>
where
T: num_traits::PrimInt + Display,
{
if let Some(res) = num_traits::checked_pow(arg, exp) {
Ok(res)
} else {
msg!("Error: Overflow in {} ^ {}", arg, exp);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_powf(arg: f64, exp: f64) -> Result<f64, ProgramError> {
let res = f64::powf(arg, exp);
if res.is_finite() {
Ok(res)
} else {
msg!("Error: Overflow in {} ^ {}", arg, exp);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_powi(arg: f64, exp: i32) -> Result<f64, ProgramError> {
let res = if exp > 0 {
f64::powi(arg, exp)
} else {
1.0 / f64::powi(arg, -exp)
};
if res.is_finite() {
Ok(res)
} else {
msg!("Error: Overflow in {} ^ {}", arg, exp);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_as_u64<T>(arg: T) -> Result<u64, ProgramError>
where
T: Display + num_traits::ToPrimitive + Clone,
{
let option: Option<u64> = num_traits::NumCast::from(arg.clone());
if let Some(res) = option {
Ok(res)
} else {
msg!("Error: Overflow in {} as u64", arg);
Err(FarmError::MathOverflow.into())
}
}
pub fn checked_as_u128<T>(arg: T) -> Result<u128, ProgramError>
where
T: Display + num_traits::ToPrimitive + Clone,
{
let option: Option<u128> = num_traits::NumCast::from(arg.clone());
if let Some(res) = option {
Ok(res)
} else {
msg!("Error: Overflow in {} as u128", arg);
Err(FarmError::MathOverflow.into())
}
}
pub fn get_fee_parts(fee: f64) -> (u64, u64) {
if fee <= 0.0 || fee > 1.0 {
return (0, 1);
}
let mut numerator = fee;
let mut denominator = 1u64;
let mut i = 0;
while numerator != (numerator as u64) as f64 && i < 6 {
numerator *= 10.0;
denominator *= 10;
i += 1;
}
if numerator as u64 == denominator {
(1, 1)
} else {
(numerator as u64, denominator)
}
}
pub fn get_no_fee_amount(
amount: u64,
fee_numerator: u64,
fee_denominator: u64,
) -> Result<u64, ProgramError> {
if amount == 0 {
return Ok(0);
}
checked_sub(
amount,
std::cmp::max(
checked_as_u64(checked_div(
checked_mul(amount as u128, fee_numerator as u128)?,
fee_denominator as u128,
)?)?,
1,
),
)
}
pub fn hash_address(current_hash: u64, address: &Pubkey) -> u64 {
let mut input: Vec<u8>;
let mut hasher = Hasher::default();
if current_hash != 0 {
input = current_hash.to_le_bytes().to_vec();
input.extend_from_slice(address.as_ref());
} else {
input = address.as_ref().to_vec();
}
hasher.hash(input.as_slice());
let hash = hasher.result();
u64::from_le_bytes(*array_ref!(hash.as_ref(), 0, 8))
}
