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xmr-btc-swap
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Avoid carrying rng

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pull/173/head
Franck Royer 3 years ago
parent 25bf5df122
commit e82383bcf6
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GPG Key ID: A82ED75A8DFC50A4
5 changed files with 24 additions and 39 deletions
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1
swap/src/protocol/alice.rs
Unescape Escape View File

@ -198,6 +198,7 @@ impl Builder {
self.execution_params.bitcoin_punish_timelock,
redeem_address,
punish_address,
rng,
);
Ok(AliceState::Started { amounts, state0 })

20
swap/src/protocol/alice/state.rs
Unescape Escape View File

@ -16,7 +16,6 @@ use rand::{CryptoRng, RngCore};
use serde::{Deserialize, Serialize};
use sha2::Sha256;
use std::fmt;
use tracing::info;
#[derive(Debug)]
pub enum AliceState {
@ -87,6 +86,7 @@ pub struct State0 {
pub a: bitcoin::SecretKey,
pub s_a: cross_curve_dleq::Scalar,
pub v_a: monero::PrivateViewKey,
pub dleq_proof_s_a: cross_curve_dleq::Proof,
#[serde(with = "::bitcoin::util::amount::serde::as_sat")]
pub btc: bitcoin::Amount,
pub xmr: monero::Amount,
@ -98,7 +98,7 @@ pub struct State0 {
impl State0 {
#[allow(clippy::too_many_arguments)]
pub fn new(
pub fn new<R>(
a: bitcoin::SecretKey,
s_a: cross_curve_dleq::Scalar,
v_a: monero::PrivateViewKey,
@ -108,11 +108,18 @@ impl State0 {
punish_timelock: Timelock,
redeem_address: bitcoin::Address,
punish_address: bitcoin::Address,
) -> Self {
rng: &mut R,
) -> Self
where
R: RngCore + CryptoRng,
{
let dleq_proof_s_a = cross_curve_dleq::Proof::new(rng, &s_a);
Self {
a,
s_a,
v_a,
dleq_proof_s_a,
redeem_address,
punish_address,
btc,
@ -122,17 +129,14 @@ impl State0 {
}
}
pub fn next_message<R: RngCore + CryptoRng>(&self, rng: &mut R) -> alice::Message0 {
info!("Producing first message");
let dleq_proof_s_a = cross_curve_dleq::Proof::new(rng, &self.s_a);
pub fn next_message(&self) -> alice::Message0 {
alice::Message0 {
A: self.a.public(),
S_a_monero: monero::PublicKey::from_private_key(&monero::PrivateKey {
scalar: self.s_a.into_ed25519(),
}),
S_a_bitcoin: self.s_a.into_secp256k1().into(),
dleq_proof_s_a,
dleq_proof_s_a: self.dleq_proof_s_a.clone(),
v_a: self.v_a,
redeem_address: self.redeem_address.clone(),
punish_address: self.punish_address.clone(),

3
swap/src/protocol/alice/steps.rs
Unescape Escape View File

@ -23,7 +23,6 @@ use futures::{
pin_mut,
};
use libp2p::PeerId;
use rand::rngs::OsRng;
use sha2::Sha256;
use std::sync::Arc;
use tokio::time::timeout;
@ -62,7 +61,7 @@ pub async fn negotiate(
)
.await??;
let alice_message0 = state0.next_message(&mut OsRng);
let alice_message0 = state0.next_message();
event_loop_handle
.send_message0(channel, alice_message0)
.await?;

9
swap/src/protocol/bob/state.rs
Unescape Escape View File

@ -74,6 +74,7 @@ pub struct State0 {
b: bitcoin::SecretKey,
s_b: cross_curve_dleq::Scalar,
v_b: monero::PrivateViewKey,
dleq_proof_s_b: cross_curve_dleq::Proof,
#[serde(with = "::bitcoin::util::amount::serde::as_sat")]
btc: bitcoin::Amount,
xmr: monero::Amount,
@ -97,6 +98,7 @@ impl State0 {
let s_b = cross_curve_dleq::Scalar::random(rng);
let v_b = monero::PrivateViewKey::new_random(rng);
let dleq_proof_s_b = cross_curve_dleq::Proof::new(rng, &s_b);
Self {
b,
@ -104,6 +106,7 @@ impl State0 {
v_b,
btc,
xmr,
dleq_proof_s_b,
cancel_timelock,
punish_timelock,
refund_address,
@ -111,16 +114,14 @@ impl State0 {
}
}
pub fn next_message<R: RngCore + CryptoRng>(&self, rng: &mut R) -> bob::Message0 {
let dleq_proof_s_b = cross_curve_dleq::Proof::new(rng, &self.s_b);
pub fn next_message(&self) -> bob::Message0 {
bob::Message0 {
B: self.b.public(),
S_b_monero: monero::PublicKey::from_private_key(&monero::PrivateKey {
scalar: self.s_b.into_ed25519(),
}),
S_b_bitcoin: self.s_b.into_secp256k1().into(),
dleq_proof_s_b,
dleq_proof_s_b: self.dleq_proof_s_b.clone(),
v_b: self.v_b,
refund_address: self.refund_address.clone(),
}

30
swap/src/protocol/bob/swap.rs
Unescape Escape View File

@ -11,7 +11,6 @@ use crate::{
};
use anyhow::{bail, Result};
use async_recursion::async_recursion;
use rand::{rngs::OsRng, CryptoRng, RngCore};
use std::sync::Arc;
use tokio::select;
use tracing::info;
@ -44,7 +43,6 @@ pub async fn run_until(
swap.db,
swap.bitcoin_wallet,
swap.monero_wallet,
OsRng,
swap.swap_id,
swap.execution_params,
)
@ -54,20 +52,16 @@ pub async fn run_until(
// State machine driver for swap execution
#[allow(clippy::too_many_arguments)]
#[async_recursion]
async fn run_until_internal<R>(
async fn run_until_internal(
state: BobState,
is_target_state: fn(&BobState) -> bool,
mut event_loop_handle: EventLoopHandle,
db: Database,
bitcoin_wallet: Arc<bitcoin::Wallet>,
monero_wallet: Arc<monero::Wallet>,
mut rng: R,
swap_id: Uuid,
execution_params: ExecutionParams,
) -> Result<BobState>
where
R: RngCore + CryptoRng + Send,
{
) -> Result<BobState> {
info!("Current state: {}", state);
if is_target_state(&state) {
Ok(state)
@ -80,7 +74,6 @@ where
state0,
amounts,
&mut event_loop_handle,
&mut rng,
bitcoin_wallet.clone(),
)
.await?;
@ -95,7 +88,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -117,7 +109,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -170,7 +161,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -217,7 +207,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -260,7 +249,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -296,7 +284,6 @@ where
db,
bitcoin_wallet.clone(),
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -318,7 +305,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -344,7 +330,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -376,7 +361,6 @@ where
db,
bitcoin_wallet,
monero_wallet,
rng,
swap_id,
execution_params,
)
@ -390,16 +374,12 @@ where
}
}
pub async fn negotiate<R>(
pub async fn negotiate(
state0: crate::protocol::bob::state::State0,
amounts: SwapAmounts,
swarm: &mut EventLoopHandle,
mut rng: R,
bitcoin_wallet: Arc<crate::bitcoin::Wallet>,
) -> Result<bob::state::State2>
where
R: RngCore + CryptoRng + Send,
{
) -> Result<bob::state::State2> {
tracing::trace!("Starting negotiate");
swarm
.send_swap_request(SwapRequest {
@ -411,7 +391,7 @@ where
// argument.
let _swap_response = swarm.recv_swap_response().await?;
swarm.send_message0(state0.next_message(&mut rng)).await?;
swarm.send_message0(state0.next_message()).await?;
let msg0 = swarm.recv_message0().await?;
let state1 = state0.receive(bitcoin_wallet.as_ref(), msg0).await?;

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