Git-Mirrors/xmr-btc-swap
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Calculate amounts from BTC

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This commit is contained in:
Tobin C. Harding 2020-10-16 12:42:47 +11:00
parent e457130b6c
commit 1251681cfd
2 changed files with 36 additions and 11 deletions
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39
swap/src/alice.rs
View File

@ -13,7 +13,7 @@ mod messenger;
use self::messenger::*; use self::messenger::*;
use crate::{ use crate::{
monero, bitcoin, monero,
network::{ network::{
peer_tracker::{self, PeerTracker}, peer_tracker::{self, PeerTracker},
request_response::{AliceToBob, TIMEOUT}, request_response::{AliceToBob, TIMEOUT},
@ -31,14 +31,8 @@ pub async fn swap(listen: Multiaddr) -> Result<()> {
match swarm.next().await { match swarm.next().await {
BehaviourOutEvent::Request(messenger::BehaviourOutEvent::Btc { btc, channel }) => { BehaviourOutEvent::Request(messenger::BehaviourOutEvent::Btc { btc, channel }) => {
debug!("Got request from Bob to swap {}", btc); debug!("Got request from Bob to swap {}", btc);
let params = SwapParams { let p = calculate_amounts(btc);
btc, swarm.send(channel, AliceToBob::Amounts(p));
// TODO: Do a real calculation.
xmr: monero::Amount::from_piconero(10),
};
let msg = AliceToBob::Amounts(params);
swarm.send(channel, msg);
} }
other => panic!("unexpected event: {:?}", other), other => panic!("unexpected event: {:?}", other),
} }
@ -137,3 +131,30 @@ impl Default for Alice {
} }
} }
} }
fn calculate_amounts(btc: bitcoin::Amount) -> SwapParams {
const XMR_PER_BTC: u64 = 100; // TODO: Get this from an exchange.
// XMR uses 12 zerose BTC uses 8.
let picos = (btc.as_sat() * 10000) * XMR_PER_BTC;
let xmr = monero::Amount::from_piconero(picos);
SwapParams { btc, xmr }
}
#[cfg(test)]
mod tests {
use super::*;
const ONE_BTC: u64 = 100_000_000;
const HUNDRED_XMR: u64 = 100_000_000_000_000;
#[test]
fn one_bitcoin_equals_a_hundred_moneroj() {
let btc = bitcoin::Amount::from_sat(ONE_BTC);
let want = monero::Amount::from_piconero(HUNDRED_XMR);
let SwapParams { xmr: got, .. } = calculate_amounts(btc);
assert_eq!(got, want);
}
}

8
swap/src/lib.rs
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@ -43,7 +43,7 @@ pub mod monero {
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
use std::fmt; use std::fmt;
#[derive(Copy, Clone, Debug, Serialize, Deserialize)] #[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
pub struct Amount(u64); pub struct Amount(u64);
impl Amount { impl Amount {
@ -76,7 +76,7 @@ pub mod bitcoin {
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
use std::fmt; use std::fmt;
#[derive(Copy, Clone, Debug, Serialize, Deserialize)] #[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
pub struct Amount(u64); pub struct Amount(u64);
impl Amount { impl Amount {
@ -92,6 +92,10 @@ pub mod bitcoin {
pub fn from_sat(satoshi: u64) -> Amount { pub fn from_sat(satoshi: u64) -> Amount {
Amount(satoshi) Amount(satoshi)
} }
pub fn as_sat(&self) -> u64 {
self.0
}
} }
impl fmt::Display for Amount { impl fmt::Display for Amount {