12856536243

Committed 19 Jan 2025 07:30PM UTC coverage: 60.548% (+0.06%) from 60.489%

Build # 12856536243

Build Type

Pull #491

github

Committed by

web-flow

Commit Message

Merge 13bf515d5 into 4bbac3446

Pull Request Pull Request #491: use FeeRate for max_fee_rate arg, and default it to BROADCAST_MIN

Coverage Stats

7 of 13 new or added lines in 6 files covered. (53.85%)

5 existing lines in 1 file now uncovered.

2939 of 4854 relevant lines covered (60.55%)

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0.0

/payjoin-cli/src/app/v2.rs

use std::str::FromStr;
use std::sync::Arc;

use anyhow::{anyhow, Context, Result};
use bitcoincore_rpc::RpcApi;
use payjoin::bitcoin::consensus::encode::serialize_hex;
use payjoin::bitcoin::psbt::Psbt;
use payjoin::bitcoin::{Amount, FeeRate};
use payjoin::receive::v2::{Receiver, UncheckedProposal};
use payjoin::receive::Error;
use payjoin::send::v2::{Sender, SenderBuilder};
use payjoin::{bitcoin, Uri};
use tokio::signal;
use tokio::sync::watch;

use super::config::AppConfig;
use super::App as AppTrait;
use crate::app::{http_agent, input_pair_from_list_unspent};
use crate::db::Database;

#[derive(Clone)]
pub(crate) struct App {
    config: AppConfig,
    db: Arc<Database>,
    interrupt: watch::Receiver<()>,
}

#[async_trait::async_trait]
impl AppTrait for App {
    fn new(config: AppConfig) -> Result<Self> {
        let db = Arc::new(Database::create(&config.db_path)?);
        let (interrupt_tx, interrupt_rx) = watch::channel(());
        tokio::spawn(handle_interrupt(interrupt_tx));
        let app = Self { config, db, interrupt: interrupt_rx };
        app.bitcoind()?
            .get_blockchain_info()
            .context("Failed to connect to bitcoind. Check config RPC connection.")?;
        Ok(app)
    }

    fn bitcoind(&self) -> Result<bitcoincore_rpc::Client> {
        match &self.config.bitcoind_cookie {
            Some(cookie) => bitcoincore_rpc::Client::new(
                self.config.bitcoind_rpchost.as_str(),
                bitcoincore_rpc::Auth::CookieFile(cookie.into()),
            ),
            None => bitcoincore_rpc::Client::new(
                self.config.bitcoind_rpchost.as_str(),
                bitcoincore_rpc::Auth::UserPass(
                    self.config.bitcoind_rpcuser.clone(),
                    self.config.bitcoind_rpcpassword.clone(),
                ),
            ),
        }
        .with_context(|| "Failed to connect to bitcoind")
    }

    async fn send_payjoin(&self, bip21: &str, fee_rate: FeeRate) -> Result<()> {
        use payjoin::UriExt;
        let uri =
            Uri::try_from(bip21).map_err(|e| anyhow!("Failed to create URI from BIP21: {}", e))?;
        let uri = uri.assume_checked();
        let uri = uri.check_pj_supported().map_err(|_| anyhow!("URI does not support Payjoin"))?;
        let url = uri.extras.endpoint();
        // match bip21 to send_session public_key
        let req_ctx = match self.db.get_send_session(url)? {
            Some(send_session) => send_session,
            None => {
                let psbt = self.create_original_psbt(&uri, fee_rate)?;
                let mut req_ctx = SenderBuilder::new(psbt, uri.clone())
                    .build_recommended(fee_rate)
                    .with_context(|| "Failed to build payjoin request")?;
                self.db.insert_send_session(&mut req_ctx, url)?;
                req_ctx
            }
        };
        self.spawn_payjoin_sender(req_ctx).await
    }

    async fn receive_payjoin(self, amount: Amount) -> Result<()> {
        let address = self.bitcoind()?.get_new_address(None, None)?.assume_checked();
        let ohttp_keys = unwrap_ohttp_keys_or_else_fetch(&self.config).await?;
        let session =
            Receiver::new(address, self.config.pj_directory.clone(), ohttp_keys.clone(), None);
        self.db.insert_recv_session(session.clone())?;
        self.spawn_payjoin_receiver(session, Some(amount)).await
    }
}

impl App {
    #[allow(clippy::incompatible_msrv)]
    async fn spawn_payjoin_sender(&self, mut req_ctx: Sender) -> Result<()> {
        let mut interrupt = self.interrupt.clone();
        tokio::select! {
            res = self.long_poll_post(&mut req_ctx) => {
                self.process_pj_response(res?)?;
                self.db.clear_send_session(req_ctx.endpoint())?;
            }
            _ = interrupt.changed() => {
                println!("Interrupted. Call `send` with the same arguments to resume this session or `resume` to resume all sessions.");
            }
        }
        Ok(())
    }

    #[allow(clippy::incompatible_msrv)]
    async fn spawn_payjoin_receiver(
        &self,
        mut session: Receiver,
        amount: Option<Amount>,
    ) -> Result<()> {
        println!("Receive session established");
        let mut pj_uri = session.pj_uri();
        pj_uri.amount = amount;

        println!("Request Payjoin by sharing this Payjoin Uri:");
        println!("{}", pj_uri);

        let mut interrupt = self.interrupt.clone();
        let receiver = tokio::select! {
            res = self.long_poll_fallback(&mut session) => res,
            _ = interrupt.changed() => {
                println!("Interrupted. Call the `resume` command to resume all sessions.");
                return Ok(());
            }
        }?;

        println!("Fallback transaction received. Consider broadcasting this to get paid if the Payjoin fails:");
        println!("{}", serialize_hex(&receiver.extract_tx_to_schedule_broadcast()));
        let mut payjoin_proposal = match self.process_v2_proposal(receiver.clone()) {
            Ok(proposal) => proposal,
            Err(e) => {
                return Err(handle_request_error(e, receiver, &self.config.ohttp_relay).await);
            }
        };
        let (req, ohttp_ctx) = payjoin_proposal
            .extract_v2_req(&self.config.ohttp_relay)
            .map_err(|e| anyhow!("v2 req extraction failed {}", e))?;
        println!("Got a request from the sender. Responding with a Payjoin proposal.");
        let res = post_request(req).await?;
        payjoin_proposal
            .process_res(&res.bytes().await?, ohttp_ctx)
            .map_err(|e| anyhow!("Failed to deserialize response {}", e))?;
        let payjoin_psbt = payjoin_proposal.psbt().clone();
        println!(
            "Response successful. Watch mempool for successful Payjoin. TXID: {}",
            payjoin_psbt.extract_tx_unchecked_fee_rate().clone().compute_txid()
        );
        self.db.clear_recv_session()?;
        Ok(())
    }

    #[allow(clippy::incompatible_msrv)]
    pub async fn resume_payjoins(&self) -> Result<()> {
        let recv_sessions = self.db.get_recv_sessions()?;
        let send_sessions = self.db.get_send_sessions()?;

        if recv_sessions.is_empty() && send_sessions.is_empty() {
            println!("No sessions to resume.");
            return Ok(());
        }

        let mut tasks = Vec::new();

        for session in recv_sessions {
            let self_clone = self.clone();
            tasks.push(tokio::spawn(async move {
                self_clone.spawn_payjoin_receiver(session, None).await
            }));
        }

        for session in send_sessions {
            let self_clone = self.clone();
            tasks.push(tokio::spawn(async move { self_clone.spawn_payjoin_sender(session).await }));
        }

        let mut interrupt = self.interrupt.clone();
        tokio::select! {
            _ = async {
                for task in tasks {
                    let _ = task.await;
                }
            } => {
                println!("All resumed sessions completed.");
            }
            _ = interrupt.changed() => {
                println!("Resumed sessions were interrupted.");
            }
        }
        Ok(())
    }

    async fn long_poll_post(&self, req_ctx: &mut Sender) -> Result<Psbt> {
        match req_ctx.extract_v2(self.config.ohttp_relay.clone()) {
            Ok((req, ctx)) => {
                println!("Posting Original PSBT Payload request...");
                let response = post_request(req).await?;
                println!("Sent fallback transaction");
                let v2_ctx = Arc::new(ctx.process_response(&response.bytes().await?)?);
                loop {
                    let (req, ohttp_ctx) = v2_ctx.extract_req(self.config.ohttp_relay.clone())?;
                    let response = post_request(req).await?;
                    match v2_ctx.process_response(&response.bytes().await?, ohttp_ctx) {
                        Ok(Some(psbt)) => return Ok(psbt),
                        Ok(None) => {
                            println!("No response yet.");
                        }
                        Err(re) => {
                            println!("{}", re);
                            log::debug!("{:?}", re);
                            return Err(anyhow!("Response error").context(re));
                        }
                    }
                }
            }
            Err(_) => {
                let (req, v1_ctx) = req_ctx.extract_v1()?;
                println!("Posting Original PSBT Payload request...");
                let response = post_request(req).await?;
                println!("Sent fallback transaction");
                match v1_ctx.process_response(&mut response.bytes().await?.to_vec().as_slice()) {
                    Ok(psbt) => Ok(psbt),
                    Err(re) => {
                        println!("{}", re);
                        log::debug!("{:?}", re);
                        Err(anyhow!("Response error").context(re))
                    }
                }
            }
        }
    }

    async fn long_poll_fallback(
        &self,
        session: &mut payjoin::receive::v2::Receiver,
    ) -> Result<payjoin::receive::v2::UncheckedProposal> {
        loop {
            let (req, context) = session.extract_req(&self.config.ohttp_relay)?;
            println!("Polling receive request...");
            let ohttp_response = post_request(req).await?;
            let proposal = session
                .process_res(ohttp_response.bytes().await?.to_vec().as_slice(), context)
                .map_err(|_| anyhow!("GET fallback failed"))?;
            log::debug!("got response");
            if let Some(proposal) = proposal {
                break Ok(proposal);
            }
        }
    }

    fn process_v2_proposal(
        &self,
        proposal: payjoin::receive::v2::UncheckedProposal,
    ) -> Result<payjoin::receive::v2::PayjoinProposal, Error> {
        let bitcoind = self.bitcoind().map_err(|e| Error::Implementation(e.into()))?;

        // in a payment processor where the sender could go offline, this is where you schedule to broadcast the original_tx
        let _to_broadcast_in_failure_case = proposal.extract_tx_to_schedule_broadcast();

        // The network is used for checks later
        let network =
            bitcoind.get_blockchain_info().map_err(|e| Error::Implementation(e.into()))?.chain;
        // Receive Check 1: Can Broadcast
        let proposal = proposal.check_broadcast_suitability(None, |tx| {
            let raw_tx = bitcoin::consensus::encode::serialize_hex(&tx);
            let mempool_results = bitcoind
                .test_mempool_accept(&[raw_tx])
                .map_err(|e| Error::Implementation(e.into()))?;
            match mempool_results.first() {
                Some(result) => Ok(result.allowed),
                None => Err(Error::Implementation(
                    anyhow!("No mempool results returned on broadcast check").into(),
                )),
            }
        })?;
        log::trace!("check1");

        // Receive Check 2: receiver can't sign for proposal inputs
        let proposal = proposal.check_inputs_not_owned(|input| {
            if let Ok(address) = bitcoin::Address::from_script(input, network) {
                bitcoind
                    .get_address_info(&address)
                    .map(|info| info.is_mine.unwrap_or(false))
                    .map_err(|e| Error::Implementation(e.into()))
            } else {
                Ok(false)
            }
        })?;
        log::trace!("check2");

        // Receive Check 3: have we seen this input before? More of a check for non-interactive i.e. payment processor receivers.
        let payjoin = proposal.check_no_inputs_seen_before(|input| {
            self.db.insert_input_seen_before(*input).map_err(|e| Error::Implementation(e.into()))
        })?;
        log::trace!("check3");

        let payjoin = payjoin
            .identify_receiver_outputs(|output_script| {
                if let Ok(address) = bitcoin::Address::from_script(output_script, network) {
                    bitcoind
                        .get_address_info(&address)
                        .map(|info| info.is_mine.unwrap_or(false))
                        .map_err(|e| Error::Implementation(e.into()))
                } else {
                    Ok(false)
                }
            })?
            .commit_outputs();

        let provisional_payjoin = try_contributing_inputs(payjoin.clone(), &bitcoind)
            .unwrap_or_else(|e| {
                log::warn!("Failed to contribute inputs: {}", e);
                payjoin.commit_inputs()
            });

        let payjoin_proposal = provisional_payjoin.finalize_proposal(
            |psbt: &Psbt| {
                bitcoind
                    .wallet_process_psbt(&psbt.to_string(), None, None, Some(false))
                    .map(|res| {
                        Psbt::from_str(&res.psbt).map_err(|e| Error::Implementation(e.into()))
                    })
                    .map_err(|e| Error::Implementation(e.into()))?
            },
            Some(bitcoin::FeeRate::MIN),
            self.config.max_fee_rate.unwrap_or(FeeRate::BROADCAST_MIN),
        )?;
        let payjoin_proposal_psbt = payjoin_proposal.psbt();
        log::debug!("Receiver's Payjoin proposal PSBT Rsponse: {:#?}", payjoin_proposal_psbt);
        Ok(payjoin_proposal)
    }
}

/// Handle request error by sending an error response over the directory
async fn handle_request_error(
    e: Error,
    mut receiver: UncheckedProposal,
    ohttp_relay: &payjoin::Url,
) -> anyhow::Error {
    let (err_req, err_ctx) = match receiver.extract_err_req(&e, ohttp_relay) {
        Ok(req_ctx) => req_ctx,
        Err(e) => return anyhow!("Failed to extract error request: {}", e),
    };

    let err_response = match post_request(err_req).await {
        Ok(response) => response,
        Err(e) => return anyhow!("Failed to post error request: {}", e),
    };

    let err_bytes = match err_response.bytes().await {
        Ok(bytes) => bytes,
        Err(e) => return anyhow!("Failed to get error response bytes: {}", e),
    };

    if let Err(e) = receiver.process_err_res(&err_bytes, err_ctx) {
        return anyhow!("Failed to process error response: {}", e);
    }

    e.into()
}

fn try_contributing_inputs(
    payjoin: payjoin::receive::v2::WantsInputs,
    bitcoind: &bitcoincore_rpc::Client,
) -> Result<payjoin::receive::v2::ProvisionalProposal> {
    let candidate_inputs = bitcoind
        .list_unspent(None, None, None, None, None)
        .context("Failed to list unspent from bitcoind")?
        .into_iter()
        .map(input_pair_from_list_unspent);
    let selected_input = payjoin
        .try_preserving_privacy(candidate_inputs)
        .map_err(|e| anyhow!("Failed to make privacy preserving selection: {}", e))?;
    log::debug!("selected input: {:#?}", selected_input);

    Ok(payjoin
        .contribute_inputs(vec![selected_input])
        .expect("This shouldn't happen. Failed to contribute inputs.")
        .commit_inputs())
}

async fn unwrap_ohttp_keys_or_else_fetch(config: &AppConfig) -> Result<payjoin::OhttpKeys> {
    if let Some(keys) = config.ohttp_keys.clone() {
        println!("Using OHTTP Keys from config");
        Ok(keys)
    } else {
        println!("Bootstrapping private network transport over Oblivious HTTP");
        let ohttp_relay = config.ohttp_relay.clone();
        let payjoin_directory = config.pj_directory.clone();
        #[cfg(feature = "_danger-local-https")]
        let ohttp_keys = {
            let cert_der = crate::app::read_local_cert()?;
            payjoin::io::fetch_ohttp_keys_with_cert(ohttp_relay, payjoin_directory, cert_der)
                .await?
        };
        #[cfg(not(feature = "_danger-local-https"))]
        let ohttp_keys = payjoin::io::fetch_ohttp_keys(ohttp_relay, payjoin_directory).await?;
        Ok(ohttp_keys)
    }
}

async fn handle_interrupt(tx: watch::Sender<()>) {
    if let Err(e) = signal::ctrl_c().await {
        eprintln!("Error setting up Ctrl-C handler: {}", e);
    }
    let _ = tx.send(());
}

async fn post_request(req: payjoin::Request) -> Result<reqwest::Response> {
    let http = http_agent()?;
    http.post(req.url)
        .header("Content-Type", req.content_type)
        .body(req.body)
        .send()
        .await
        .map_err(map_reqwest_err)
}

fn map_reqwest_err(e: reqwest::Error) -> anyhow::Error {
    match e.status() {
        Some(status_code) => anyhow!("HTTP request failed: {} {}", status_code, e),
        None => anyhow!("No HTTP response: {}", e),
    }
}

1	use std::str::FromStr;
2	use std::sync::Arc;
3
4	use anyhow::{anyhow, Context, Result};
5	use bitcoincore_rpc::RpcApi;
6	use payjoin::bitcoin::consensus::encode::serialize_hex;
7	use payjoin::bitcoin::psbt::Psbt;
8	use payjoin::bitcoin::{Amount, FeeRate};
9	use payjoin::receive::v2::{Receiver, UncheckedProposal};
10	use payjoin::receive::Error;
11	use payjoin::send::v2::{Sender, SenderBuilder};
12	use payjoin::{bitcoin, Uri};
13	use tokio::signal;
14	use tokio::sync::watch;
15
16	use super::config::AppConfig;
17	use super::App as AppTrait;
18	use crate::app::{http_agent, input_pair_from_list_unspent};
19	use crate::db::Database;
20
21	#[derive(Clone)]
22	pub(crate) struct App {
23	config: AppConfig,
24	db: Arc<Database>,
25	interrupt: watch::Receiver<()>,
26	}
27
28	#[async_trait::async_trait]
29	impl AppTrait for App {
30	fn new(config: AppConfig) -> Result<Self> {	×
31	let db = Arc::new(Database::create(&config.db_path)?);	×
32	let (interrupt_tx, interrupt_rx) = watch::channel(());	×
33	tokio::spawn(handle_interrupt(interrupt_tx));	×
34	let app = Self { config, db, interrupt: interrupt_rx };	×
35	app.bitcoind()?	×
36	.get_blockchain_info()	×
37	.context("Failed to connect to bitcoind. Check config RPC connection.")?;	×
38	Ok(app)	×
39	}	×
40
41	fn bitcoind(&self) -> Result<bitcoincore_rpc::Client> {	×
42	match &self.config.bitcoind_cookie {	×
43	Some(cookie) => bitcoincore_rpc::Client::new(	×
44	self.config.bitcoind_rpchost.as_str(),	×
45	bitcoincore_rpc::Auth::CookieFile(cookie.into()),	×
46	),	×
47	None => bitcoincore_rpc::Client::new(	×
48	self.config.bitcoind_rpchost.as_str(),	×
49	bitcoincore_rpc::Auth::UserPass(	×
50	self.config.bitcoind_rpcuser.clone(),	×
51	self.config.bitcoind_rpcpassword.clone(),	×
52	),	×
53	),	×
54	}
55	.with_context(\|\| "Failed to connect to bitcoind")	×
56	}	×
57
58	async fn send_payjoin(&self, bip21: &str, fee_rate: FeeRate) -> Result<()> {	×
59	use payjoin::UriExt;
60	let uri =	×
61	Uri::try_from(bip21).map_err(\|e\| anyhow!("Failed to create URI from BIP21: {}", e))?;	×
62	let uri = uri.assume_checked();	×
63	let uri = uri.check_pj_supported().map_err(\|_\| anyhow!("URI does not support Payjoin"))?;	×
64	let url = uri.extras.endpoint();	×
65	// match bip21 to send_session public_key
66	let req_ctx = match self.db.get_send_session(url)? {	×
67	Some(send_session) => send_session,	×
68	None => {
69	let psbt = self.create_original_psbt(&uri, fee_rate)?;	×
70	let mut req_ctx = SenderBuilder::new(psbt, uri.clone())	×
71	.build_recommended(fee_rate)	×
72	.with_context(\|\| "Failed to build payjoin request")?;	×
73	self.db.insert_send_session(&mut req_ctx, url)?;	×
74	req_ctx	×
75	}
76	};
77	self.spawn_payjoin_sender(req_ctx).await	×
78	}	×
79
80	async fn receive_payjoin(self, amount: Amount) -> Result<()> {	×
81	let address = self.bitcoind()?.get_new_address(None, None)?.assume_checked();	×
82	let ohttp_keys = unwrap_ohttp_keys_or_else_fetch(&self.config).await?;	×
83	let session =	×
84	Receiver::new(address, self.config.pj_directory.clone(), ohttp_keys.clone(), None);	×
85	self.db.insert_recv_session(session.clone())?;	×
86	self.spawn_payjoin_receiver(session, Some(amount)).await	×
87	}	×
88	}
89
90	impl App {
91	#[allow(clippy::incompatible_msrv)]
92	async fn spawn_payjoin_sender(&self, mut req_ctx: Sender) -> Result<()> {	×
93	let mut interrupt = self.interrupt.clone();	×
94	tokio::select! {	×
95	res = self.long_poll_post(&mut req_ctx) => {	×
96	self.process_pj_response(res?)?;	×
97	self.db.clear_send_session(req_ctx.endpoint())?;	×
98	}
99	_ = interrupt.changed() => {	×
100	println!("Interrupted. Call `send` with the same arguments to resume this session or `resume` to resume all sessions.");	×
101	}	×
102	}
103	Ok(())	×
104	}	×
105
106	#[allow(clippy::incompatible_msrv)]
107	async fn spawn_payjoin_receiver(	×
108	&self,	×
109	mut session: Receiver,	×
110	amount: Option<Amount>,	×
111	) -> Result<()> {	×
112	println!("Receive session established");	×
113	let mut pj_uri = session.pj_uri();	×
114	pj_uri.amount = amount;	×
115		×
116	println!("Request Payjoin by sharing this Payjoin Uri:");	×
117	println!("{}", pj_uri);	×
118		×
119	let mut interrupt = self.interrupt.clone();	×
120	let receiver = tokio::select! {	×
121	res = self.long_poll_fallback(&mut session) => res,	×
122	_ = interrupt.changed() => {	×
123	println!("Interrupted. Call the `resume` command to resume all sessions.");	×
124	return Ok(());	×
125	}
126	}?;	×
127
128	println!("Fallback transaction received. Consider broadcasting this to get paid if the Payjoin fails:");	×
129	println!("{}", serialize_hex(&receiver.extract_tx_to_schedule_broadcast()));	×
130	let mut payjoin_proposal = match self.process_v2_proposal(receiver.clone()) {	×
131	Ok(proposal) => proposal,	×
132	Err(e) => {	×
133	return Err(handle_request_error(e, receiver, &self.config.ohttp_relay).await);	×
134	}
135	};
136	let (req, ohttp_ctx) = payjoin_proposal	×
137	.extract_v2_req(&self.config.ohttp_relay)	×
138	.map_err(\|e\| anyhow!("v2 req extraction failed {}", e))?;	×
139	println!("Got a request from the sender. Responding with a Payjoin proposal.");	×
140	let res = post_request(req).await?;	×
141	payjoin_proposal	×
142	.process_res(&res.bytes().await?, ohttp_ctx)	×
143	.map_err(\|e\| anyhow!("Failed to deserialize response {}", e))?;	×
144	let payjoin_psbt = payjoin_proposal.psbt().clone();	×
145	println!(	×
146	"Response successful. Watch mempool for successful Payjoin. TXID: {}",	×
147	payjoin_psbt.extract_tx_unchecked_fee_rate().clone().compute_txid()	×
148	);	×
149	self.db.clear_recv_session()?;	×
150	Ok(())	×
151	}	×
152
153	#[allow(clippy::incompatible_msrv)]
154	pub async fn resume_payjoins(&self) -> Result<()> {	×
155	let recv_sessions = self.db.get_recv_sessions()?;	×
156	let send_sessions = self.db.get_send_sessions()?;	×
157
158	if recv_sessions.is_empty() && send_sessions.is_empty() {	×
159	println!("No sessions to resume.");	×
160	return Ok(());	×
161	}	×
162		×
163	let mut tasks = Vec::new();	×
164
165	for session in recv_sessions {	×
166	let self_clone = self.clone();	×
167	tasks.push(tokio::spawn(async move {	×
168	self_clone.spawn_payjoin_receiver(session, None).await	×
169	}));	×
170	}	×
171
172	for session in send_sessions {	×
173	let self_clone = self.clone();	×
174	tasks.push(tokio::spawn(async move { self_clone.spawn_payjoin_sender(session).await }));	×
175	}	×
176
177	let mut interrupt = self.interrupt.clone();	×
178	tokio::select! {	×
179	_ = async {	×
180	for task in tasks {	×
181	let _ = task.await;	×
182	}
183	} => {	×
184	println!("All resumed sessions completed.");	×
185	}	×
186	_ = interrupt.changed() => {	×
187	println!("Resumed sessions were interrupted.");	×
188	}	×
189	}
190	Ok(())	×
191	}	×
192
193	async fn long_poll_post(&self, req_ctx: &mut Sender) -> Result<Psbt> {	×
194	match req_ctx.extract_v2(self.config.ohttp_relay.clone()) {	×
195	Ok((req, ctx)) => {	×
196	println!("Posting Original PSBT Payload request...");	×
197	let response = post_request(req).await?;	×
198	println!("Sent fallback transaction");	×
199	let v2_ctx = Arc::new(ctx.process_response(&response.bytes().await?)?);	×
200	loop {
201	let (req, ohttp_ctx) = v2_ctx.extract_req(self.config.ohttp_relay.clone())?;	×
202	let response = post_request(req).await?;	×
203	match v2_ctx.process_response(&response.bytes().await?, ohttp_ctx) {	×
204	Ok(Some(psbt)) => return Ok(psbt),	×
205	Ok(None) => {	×
206	println!("No response yet.");	×
207	}	×
208	Err(re) => {	×
209	println!("{}", re);	×
210	log::debug!("{:?}", re);	×
211	return Err(anyhow!("Response error").context(re));	×
212	}
213	}
214	}
215	}
216	Err(_) => {
217	let (req, v1_ctx) = req_ctx.extract_v1()?;	×
218	println!("Posting Original PSBT Payload request...");	×
219	let response = post_request(req).await?;	×
220	println!("Sent fallback transaction");	×
221	match v1_ctx.process_response(&mut response.bytes().await?.to_vec().as_slice()) {	×
222	Ok(psbt) => Ok(psbt),	×
223	Err(re) => {	×
224	println!("{}", re);	×
225	log::debug!("{:?}", re);	×
226	Err(anyhow!("Response error").context(re))	×
227	}
228	}
229	}
230	}
231	}	×
232
233	async fn long_poll_fallback(	×
234	&self,	×
235	session: &mut payjoin::receive::v2::Receiver,	×
236	) -> Result<payjoin::receive::v2::UncheckedProposal> {	×
237	loop {
238	let (req, context) = session.extract_req(&self.config.ohttp_relay)?;	×
239	println!("Polling receive request...");	×
240	let ohttp_response = post_request(req).await?;	×
241	let proposal = session	×
242	.process_res(ohttp_response.bytes().await?.to_vec().as_slice(), context)	×
243	.map_err(\|_\| anyhow!("GET fallback failed"))?;	×
244	log::debug!("got response");	×
245	if let Some(proposal) = proposal {	×
246	break Ok(proposal);	×
247	}	×
248	}
249	}	×
250
251	fn process_v2_proposal(	×
252	&self,	×
253	proposal: payjoin::receive::v2::UncheckedProposal,	×
254	) -> Result<payjoin::receive::v2::PayjoinProposal, Error> {	×
255	let bitcoind = self.bitcoind().map_err(\|e\| Error::Implementation(e.into()))?;	×
256
257	// in a payment processor where the sender could go offline, this is where you schedule to broadcast the original_tx
258	let _to_broadcast_in_failure_case = proposal.extract_tx_to_schedule_broadcast();	×
259
260	// The network is used for checks later
261	let network =	×
262	bitcoind.get_blockchain_info().map_err(\|e\| Error::Implementation(e.into()))?.chain;	×
263	// Receive Check 1: Can Broadcast
264	let proposal = proposal.check_broadcast_suitability(None, \|tx\| {	×
265	let raw_tx = bitcoin::consensus::encode::serialize_hex(&tx);	×
266	let mempool_results = bitcoind	×
267	.test_mempool_accept(&[raw_tx])	×
268	.map_err(\|e\| Error::Implementation(e.into()))?;	×
269	match mempool_results.first() {	×
270	Some(result) => Ok(result.allowed),	×
271	None => Err(Error::Implementation(	×
272	anyhow!("No mempool results returned on broadcast check").into(),	×
273	)),	×
274	}
275	})?;	×
276	log::trace!("check1");	×
277
278	// Receive Check 2: receiver can't sign for proposal inputs
279	let proposal = proposal.check_inputs_not_owned(\|input\| {	×
280	if let Ok(address) = bitcoin::Address::from_script(input, network) {	×
281	bitcoind	×
282	.get_address_info(&address)	×
283	.map(\|info\| info.is_mine.unwrap_or(false))	×
284	.map_err(\|e\| Error::Implementation(e.into()))	×
285	} else {
286	Ok(false)	×
287	}
288	})?;	×
289	log::trace!("check2");	×
290
291	// Receive Check 3: have we seen this input before? More of a check for non-interactive i.e. payment processor receivers.
292	let payjoin = proposal.check_no_inputs_seen_before(\|input\| {	×
293	self.db.insert_input_seen_before(*input).map_err(\|e\| Error::Implementation(e.into()))	×
294	})?;	×
295	log::trace!("check3");	×
296
297	let payjoin = payjoin	×
298	.identify_receiver_outputs(\|output_script\| {	×
299	if let Ok(address) = bitcoin::Address::from_script(output_script, network) {	×
300	bitcoind	×
301	.get_address_info(&address)	×
302	.map(\|info\| info.is_mine.unwrap_or(false))	×
303	.map_err(\|e\| Error::Implementation(e.into()))	×
304	} else {
305	Ok(false)	×
306	}
307	})?	×
308	.commit_outputs();	×
309		×
310	let provisional_payjoin = try_contributing_inputs(payjoin.clone(), &bitcoind)	×
311	.unwrap_or_else(\|e\| {	×
312	log::warn!("Failed to contribute inputs: {}", e);	×
313	payjoin.commit_inputs()	×
314	});	×
315
316	let payjoin_proposal = provisional_payjoin.finalize_proposal(	×
317	\|psbt: &Psbt\| {	×
318	bitcoind	×
319	.wallet_process_psbt(&psbt.to_string(), None, None, Some(false))	×
320	.map(\|res\| {	×
321	Psbt::from_str(&res.psbt).map_err(\|e\| Error::Implementation(e.into()))	×
322	})	×
323	.map_err(\|e\| Error::Implementation(e.into()))?	×
324	},	×
325	Some(bitcoin::FeeRate::MIN),	×
NEW 326	self.config.max_fee_rate.unwrap_or(FeeRate::BROADCAST_MIN),	×
327	)?;	×
328	let payjoin_proposal_psbt = payjoin_proposal.psbt();	×
329	log::debug!("Receiver's Payjoin proposal PSBT Rsponse: {:#?}", payjoin_proposal_psbt);	×
330	Ok(payjoin_proposal)	×
331	}	×
332	}
333
334	/// Handle request error by sending an error response over the directory
335	async fn handle_request_error(	×
336	e: Error,	×
337	mut receiver: UncheckedProposal,	×
338	ohttp_relay: &payjoin::Url,	×
339	) -> anyhow::Error {	×
340	let (err_req, err_ctx) = match receiver.extract_err_req(&e, ohttp_relay) {	×
341	Ok(req_ctx) => req_ctx,	×
342	Err(e) => return anyhow!("Failed to extract error request: {}", e),	×
343	};
344
345	let err_response = match post_request(err_req).await {	×
346	Ok(response) => response,	×
347	Err(e) => return anyhow!("Failed to post error request: {}", e),	×
348	};
349
350	let err_bytes = match err_response.bytes().await {	×
351	Ok(bytes) => bytes,	×
352	Err(e) => return anyhow!("Failed to get error response bytes: {}", e),	×
353	};
354
355	if let Err(e) = receiver.process_err_res(&err_bytes, err_ctx) {	×
356	return anyhow!("Failed to process error response: {}", e);	×
357	}	×
358		×
359	e.into()	×
360	}	×
361
362	fn try_contributing_inputs(	×
363	payjoin: payjoin::receive::v2::WantsInputs,	×
364	bitcoind: &bitcoincore_rpc::Client,	×
365	) -> Result<payjoin::receive::v2::ProvisionalProposal> {	×
366	let candidate_inputs = bitcoind	×
367	.list_unspent(None, None, None, None, None)	×
368	.context("Failed to list unspent from bitcoind")?	×
369	.into_iter()	×
370	.map(input_pair_from_list_unspent);	×
371	let selected_input = payjoin	×
372	.try_preserving_privacy(candidate_inputs)	×
373	.map_err(\|e\| anyhow!("Failed to make privacy preserving selection: {}", e))?;	×
374	log::debug!("selected input: {:#?}", selected_input);	×
375
376	Ok(payjoin	×
377	.contribute_inputs(vec![selected_input])	×
378	.expect("This shouldn't happen. Failed to contribute inputs.")	×
379	.commit_inputs())	×
380	}	×
381
382	async fn unwrap_ohttp_keys_or_else_fetch(config: &AppConfig) -> Result<payjoin::OhttpKeys> {	×
383	if let Some(keys) = config.ohttp_keys.clone() {	×
384	println!("Using OHTTP Keys from config");	×
385	Ok(keys)	×
386	} else {
387	println!("Bootstrapping private network transport over Oblivious HTTP");	×
388	let ohttp_relay = config.ohttp_relay.clone();	×
389	let payjoin_directory = config.pj_directory.clone();	×
390	#[cfg(feature = "_danger-local-https")]
391	let ohttp_keys = {	×
392	let cert_der = crate::app::read_local_cert()?;	×
393	payjoin::io::fetch_ohttp_keys_with_cert(ohttp_relay, payjoin_directory, cert_der)	×
394	.await?	×
395	};
396	#[cfg(not(feature = "_danger-local-https"))]
397	let ohttp_keys = payjoin::io::fetch_ohttp_keys(ohttp_relay, payjoin_directory).await?;
398	Ok(ohttp_keys)	×
399	}
400	}	×
401
402	async fn handle_interrupt(tx: watch::Sender<()>) {	×
403	if let Err(e) = signal::ctrl_c().await {	×
404	eprintln!("Error setting up Ctrl-C handler: {}", e);	×
405	}	×
406	let _ = tx.send(());	×
407	}	×
408
409	async fn post_request(req: payjoin::Request) -> Result<reqwest::Response> {	×
410	let http = http_agent()?;	×
411	http.post(req.url)	×
412	.header("Content-Type", req.content_type)	×
413	.body(req.body)	×
414	.send()	×
415	.await	×
416	.map_err(map_reqwest_err)	×
417	}	×
418
419	fn map_reqwest_err(e: reqwest::Error) -> anyhow::Error {	×
420	match e.status() {	×
421	Some(status_code) => anyhow!("HTTP request failed: {} {}", status_code, e),	×
422	None => anyhow!("No HTTP response: {}", e),	×
423	}
424	}	×

payjoin / rust-payjoin / 12856536243

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