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Use an option for the local port

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We can wrap the local port in an option and pass None when we are not using Tor.
This reduces code duplication.
This commit is contained in:
Tobin C. Harding 2020-10-28 08:38:10 +11:00
parent 7f3aa644a0
commit 5e35904101
2 changed files with 18 additions and 55 deletions
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69
swap/src/alice.rs
View File

@ -1,6 +1,6 @@
//! Run an XMR/BTC swap in the role of Alice.
//! Alice holds XMR and wishes receive BTC.
use anyhow::Result;
use anyhow::{bail, Result};
use libp2p::{
core::{identity::Keypair, Multiaddr},
request_response::ResponseChannel,
@ -28,35 +28,13 @@ use xmr_btc::{alice::State0, bob, monero};
pub type Swarm = libp2p::Swarm<Alice>;
#[cfg(not(feature = "tor"))]
pub async fn swap(
listen: Multiaddr,
local_port: Option<u16>,
redeem_address: ::bitcoin::Address,
punish_address: ::bitcoin::Address,
) -> Result<()> {
let swarm = new_swarm(listen)?;
_swap(redeem_address, punish_address, swarm).await
}
#[cfg(feature = "tor")]
pub async fn swap(
listen: Multiaddr,
local_port: u16,
redeem_address: ::bitcoin::Address,
punish_address: ::bitcoin::Address,
) -> Result<()> {
let swarm = new_swarm(listen, local_port)?;
_swap(redeem_address, punish_address, swarm).await
}
// TODO: After we have done some testing replace all the 'panic's with log
// statements or error returns.
// FIXME: This whole function is horrible, needs total re-write.
async fn _swap(
redeem_address: ::bitcoin::Address,
punish_address: ::bitcoin::Address,
mut swarm: Swarm,
) -> Result<()> {
let mut swarm = new_swarm(listen, local_port)?;
let message0: bob::Message0;
let mut last_amounts: Option<SwapAmounts> = None;
@ -129,8 +107,7 @@ async fn _swap(
Ok(())
}
#[cfg(feature = "tor")]
fn new_swarm(listen: Multiaddr, port: u16) -> Result<Swarm> {
fn new_swarm(listen: Multiaddr, port: Option<u16>) -> Result<Swarm> {
use anyhow::Context as _;
let behaviour = Alice::default();
@ -138,7 +115,18 @@ fn new_swarm(listen: Multiaddr, port: u16) -> Result<Swarm> {
let local_key_pair = behaviour.identity();
let local_peer_id = behaviour.peer_id();
let transport = transport::build(local_key_pair, Some((listen.clone(), port)))?;
let transport;
#[cfg(feature = "tor")]
{
transport = match port {
Some(port) => transport::build(local_key_pair, Some((listen.clone(), port)))?,
None => bail!("Must supply local port"),
};
}
#[cfg(not(feature = "tor"))]
{
transport = transport::build(local_key_pair)?;
}
let mut swarm = libp2p::swarm::SwarmBuilder::new(transport, behaviour, local_peer_id.clone())
.executor(Box::new(TokioExecutor {
@ -154,31 +142,6 @@ fn new_swarm(listen: Multiaddr, port: u16) -> Result<Swarm> {
Ok(swarm)
}
#[cfg(not(feature = "tor"))]
fn new_swarm(listen: Multiaddr) -> Result<Swarm> {
use anyhow::Context as _;
let behaviour = Alice::default();
let local_key_pair = behaviour.identity();
let local_peer_id = behaviour.peer_id();
let transport = transport::build(local_key_pair)?;
let mut swarm = libp2p::swarm::SwarmBuilder::new(transport, behaviour, local_peer_id.clone())
.executor(Box::new(TokioExecutor {
handle: tokio::runtime::Handle::current(),
}))
.build();
Swarm::listen_on(&mut swarm, listen.clone())
.with_context(|| format!("Address is not supported: {:#}", listen))?;
info!("Initialized swarm: {}", local_peer_id);
Ok(swarm)
}
#[allow(clippy::large_enum_variant)]
#[derive(Debug)]
pub enum OutEvent {

4
swap/src/main.rs
View File

@ -143,11 +143,11 @@ async fn swap_as_alice(
) -> Result<()> {
#[cfg(not(feature = "tor"))]
{
alice::swap(addr, redeem, punish).await
alice::swap(addr, None, redeem, punish).await
}
#[cfg(feature = "tor")]
{
alice::swap(addr, PORT, redeem, punish).await
alice::swap(addr, Some(PORT), redeem, punish).await
}
}