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Adjust quote based on Bitcoin balance

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This commit is contained in:
leonardo 2022-02-24 02:12:45 +01:00
parent 6911509b16
commit d224c2910b
5 changed files with 127 additions and 7 deletions
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38
swap/src/monero.rs
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@ -99,6 +99,20 @@ impl Amount {
self.0
}
pub fn max_bitcoin_for_price(&self, ask_price: bitcoin::Amount) -> bitcoin::Amount {
let piconero_minus_fee = self.as_piconero().saturating_sub(MONERO_FEE.as_piconero());
if piconero_minus_fee == 0 {
return bitcoin::Amount::ZERO;
}
// There needs to be an offset for difference in zeroes beetween Piconeros and
// Satoshis
let piconero_calc = (piconero_minus_fee * ask_price.as_sat()) / PICONERO_OFFSET;
bitcoin::Amount::from_sat(piconero_calc)
}
pub fn from_monero(amount: f64) -> Result<Self> {
let decimal = Decimal::try_from(amount)?;
Self::from_decimal(decimal)
@ -360,6 +374,30 @@ mod tests {
);
}
#[test]
fn geting_max_bitcoin_to_trade() {
let amount = Amount::parse_monero("10").unwrap();
let bitcoin_price_sats = bitcoin::Amount::from_sat(382_900);
let monero_max_from_bitcoin = amount.max_bitcoin_for_price(bitcoin_price_sats);
assert_eq!(
bitcoin::Amount::from_sat(3_828_988),
monero_max_from_bitcoin
);
}
#[test]
fn geting_max_bitcoin_to_trade_with_balance_smaller_than_locking_fee() {
let monero = "0.00001";
let amount = Amount::parse_monero(monero).unwrap();
let bitcoin_price_sats = bitcoin::Amount::from_sat(382_900);
let monero_max_from_bitcoin = amount.max_bitcoin_for_price(bitcoin_price_sats);
assert_eq!(bitcoin::Amount::ZERO, monero_max_from_bitcoin);
}
use rand::rngs::OsRng;
use serde::{Deserialize, Serialize};