feat: add support for cashu wallet (nip60 & nip61) (#71)
Reviewed-on: #71
This commit was merged in pull request #71.
This commit is contained in:
@@ -0,0 +1,369 @@
|
||||
use anyhow::{Error, anyhow};
|
||||
use hkdf::Hkdf;
|
||||
use nostr::nips::nip60::TokenEvent;
|
||||
use nostr_sdk::prelude::*;
|
||||
use sha2::Sha256;
|
||||
|
||||
const SEED_SALT: &[u8] = b"coop nip60 seed salt";
|
||||
const SEED_INFO: &[u8] = b"coop cashu seed";
|
||||
|
||||
/// Parsed 17375 wallet event: the wallet key and its mint list.
|
||||
#[derive(Clone)]
|
||||
pub(crate) struct WalletData {
|
||||
pub(crate) event_id: EventId,
|
||||
pub(crate) created_at: Timestamp,
|
||||
pub(crate) privkey: SecretKey,
|
||||
pub(crate) mints: Vec<Url>,
|
||||
}
|
||||
|
||||
impl WalletData {
|
||||
/// A new wallet with a fresh key.
|
||||
pub(crate) fn generate(first_mint: Url) -> Self {
|
||||
Self {
|
||||
event_id: EventId::from_byte_array([0; 32]),
|
||||
created_at: Timestamp::from_secs(0),
|
||||
privkey: SecretKey::generate(),
|
||||
mints: vec![first_mint],
|
||||
}
|
||||
}
|
||||
|
||||
/// The cdk seed, derived deterministically from the wallet key.
|
||||
pub(crate) fn derive_seed(privkey: &SecretKey) -> Result<[u8; 64], Error> {
|
||||
let ikm = privkey.to_secret_bytes();
|
||||
let hk = Hkdf::<Sha256>::new(Some(SEED_SALT), &ikm);
|
||||
let mut seed = [0u8; 64];
|
||||
hk.expand(SEED_INFO, &mut seed)
|
||||
.map_err(|error| anyhow!("seed derivation failed: {error}"))?;
|
||||
Ok(seed)
|
||||
}
|
||||
|
||||
/// Decrypt and parse a 17375 event published by this account.
|
||||
pub(crate) async fn decrypt<S>(signer: &S, me: &PublicKey, event: &Event) -> Result<Self, Error>
|
||||
where
|
||||
S: AsyncNip44 + ?Sized,
|
||||
{
|
||||
if event.pubkey != *me {
|
||||
return Err(anyhow!("wallet event was not published by this account"));
|
||||
}
|
||||
|
||||
let content = signer.nip44_decrypt_async(me, &event.content).await?;
|
||||
let (privkey, mints) = parse_wallet_content(&content)?;
|
||||
|
||||
Ok(Self {
|
||||
event_id: event.id,
|
||||
created_at: event.created_at,
|
||||
privkey,
|
||||
mints,
|
||||
})
|
||||
}
|
||||
|
||||
/// Build the encrypted 17375 event for this wallet data.
|
||||
pub(crate) async fn to_event<S>(&self, signer: &S, me: &PublicKey) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + ?Sized,
|
||||
{
|
||||
let mut rows = vec![vec!["privkey".to_string(), self.privkey.to_secret_hex()]];
|
||||
for mint in &self.mints {
|
||||
rows.push(vec!["mint".to_string(), mint.to_string()]);
|
||||
}
|
||||
|
||||
let content = signer
|
||||
.nip44_encrypt_async(me, &serde_json::to_string(&rows)?)
|
||||
.await?;
|
||||
|
||||
Ok(EventBuilder::new(Kind::CashuWallet, content)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
}
|
||||
|
||||
fn parse_wallet_content(content: &str) -> Result<(SecretKey, Vec<Url>), Error> {
|
||||
let rows: Vec<Vec<String>> =
|
||||
serde_json::from_str(content).map_err(|error| anyhow!("invalid wallet event: {error}"))?;
|
||||
|
||||
let mut privkey = None;
|
||||
let mut mints = Vec::new();
|
||||
for row in rows {
|
||||
let (Some(key), Some(value)) = (row.first(), row.get(1)) else {
|
||||
continue;
|
||||
};
|
||||
match key.as_str() {
|
||||
"privkey" if privkey.is_none() => privkey = Some(SecretKey::from_hex(value)?),
|
||||
"mint" => {
|
||||
if let Ok(mint) = Url::parse(value) {
|
||||
mints.push(mint);
|
||||
}
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
let Some(privkey) = privkey else {
|
||||
return Err(anyhow!("wallet event is missing the private key"));
|
||||
};
|
||||
if mints.is_empty() {
|
||||
return Err(anyhow!("wallet event is missing mints"));
|
||||
}
|
||||
|
||||
Ok((privkey, mints))
|
||||
}
|
||||
|
||||
pub(crate) async fn decrypt_token_event<S>(
|
||||
signer: &S,
|
||||
me: &PublicKey,
|
||||
event: &Event,
|
||||
) -> Result<TokenEvent, Error>
|
||||
where
|
||||
S: AsyncNip44 + ?Sized,
|
||||
{
|
||||
if event.pubkey != *me {
|
||||
return Err(anyhow!("token event was not published by this account"));
|
||||
}
|
||||
|
||||
let content = signer.nip44_decrypt_async(me, &event.content).await?;
|
||||
|
||||
let token =
|
||||
serde_json::from_str(&content).map_err(|error| anyhow!("invalid token event: {error}"))?;
|
||||
|
||||
Ok(token)
|
||||
}
|
||||
|
||||
pub(crate) async fn build_token_event<S>(
|
||||
signer: &S,
|
||||
me: &PublicKey,
|
||||
token: &TokenEvent,
|
||||
) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + ?Sized,
|
||||
{
|
||||
let content = signer
|
||||
.nip44_encrypt_async(me, &serde_json::to_string(token)?)
|
||||
.await?;
|
||||
|
||||
Ok(EventBuilder::new(Kind::CashuWalletUnspentProof, content)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
|
||||
/// NIP-09 deletion carrying the `k: 7375` tag required by NIP-60.
|
||||
pub(crate) async fn build_token_deletion<S>(signer: &S, ids: &[EventId]) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + ?Sized,
|
||||
{
|
||||
let mut tags: Vec<Tag> = ids.iter().map(|id| Tag::event(*id)).collect();
|
||||
tags.push(Tag::custom("k", ["7375".to_string()]));
|
||||
|
||||
Ok(EventBuilder::new(Kind::EventDeletion, "")
|
||||
.tags(tags)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
|
||||
/// Decrypted 7376 payload, enough for the wallet panel's history list.
|
||||
pub(crate) struct HistoryPayload {
|
||||
pub(crate) direction: TransactionDirection,
|
||||
pub(crate) amount: u64,
|
||||
}
|
||||
|
||||
pub(crate) async fn decrypt_history_event<S>(
|
||||
signer: &S,
|
||||
me: &PublicKey,
|
||||
event: &Event,
|
||||
) -> Result<HistoryPayload, Error>
|
||||
where
|
||||
S: AsyncNip44 + ?Sized,
|
||||
{
|
||||
if event.pubkey != *me {
|
||||
return Err(anyhow!("history event was not published by this account"));
|
||||
}
|
||||
|
||||
let content = signer.nip44_decrypt_async(me, &event.content).await?;
|
||||
let rows: Vec<Vec<String>> = serde_json::from_str(&content)
|
||||
.map_err(|error| anyhow!("invalid history event: {error}"))?;
|
||||
|
||||
let mut direction = None;
|
||||
let mut amount = None;
|
||||
for row in rows {
|
||||
let (Some(key), Some(value)) = (row.first(), row.get(1)) else {
|
||||
continue;
|
||||
};
|
||||
match key.as_str() {
|
||||
"direction" if direction.is_none() => direction = value.parse().ok(),
|
||||
"amount" if amount.is_none() => amount = value.parse().ok(),
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
let Some(direction) = direction else {
|
||||
return Err(anyhow!("history event is missing the direction"));
|
||||
};
|
||||
let Some(amount) = amount else {
|
||||
return Err(anyhow!("history event is missing the amount"));
|
||||
};
|
||||
|
||||
Ok(HistoryPayload { direction, amount })
|
||||
}
|
||||
|
||||
/// Build the public kind 9321 nutzap event carrying P2PK-locked proofs.
|
||||
pub(crate) async fn build_nutzap_event<S>(
|
||||
signer: &S,
|
||||
recipient: PublicKey,
|
||||
mint: &str,
|
||||
proofs: &[String],
|
||||
target: Option<EventId>,
|
||||
comment: &str,
|
||||
) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + ?Sized,
|
||||
{
|
||||
let mut tags: Vec<Tag> = vec![
|
||||
Tag::custom("p", [recipient.to_hex()]),
|
||||
Tag::custom("u", [mint.to_string()]),
|
||||
Tag::custom("unit", ["sat".to_string()]),
|
||||
];
|
||||
|
||||
for proof in proofs {
|
||||
tags.push(Tag::custom("proof", [proof.clone()]));
|
||||
}
|
||||
|
||||
if let Some(target) = target {
|
||||
tags.push(Tag::custom("e", [target.to_hex()]));
|
||||
}
|
||||
|
||||
Ok(EventBuilder::new(Kind::Custom(9321), comment)
|
||||
.tags(tags)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
|
||||
/// Encrypted 7376 history payload for one state change.
|
||||
pub(crate) struct History {
|
||||
pub(crate) direction: TransactionDirection,
|
||||
pub(crate) amount: u64,
|
||||
/// NIP-61 nutzap events redeemed by this state change
|
||||
pub(crate) redeemed: Vec<EventId>,
|
||||
/// Author of the redeemed nutzap, for the unencrypted `p` tag
|
||||
pub(crate) sender: Option<PublicKey>,
|
||||
}
|
||||
|
||||
pub(crate) async fn build_history_event<S>(
|
||||
signer: &S,
|
||||
me: &PublicKey,
|
||||
history: &History,
|
||||
created: EventId,
|
||||
destroyed: &[EventId],
|
||||
) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + ?Sized,
|
||||
{
|
||||
let mut rows = vec![
|
||||
vec!["direction".to_string(), history.direction.to_string()],
|
||||
vec!["amount".to_string(), history.amount.to_string()],
|
||||
];
|
||||
|
||||
for id in destroyed {
|
||||
rows.push(vec![
|
||||
"e".to_string(),
|
||||
id.to_hex(),
|
||||
String::new(),
|
||||
"destroyed".to_string(),
|
||||
]);
|
||||
}
|
||||
|
||||
rows.push(vec![
|
||||
"e".to_string(),
|
||||
created.to_hex(),
|
||||
String::new(),
|
||||
"created".to_string(),
|
||||
]);
|
||||
|
||||
let mut tags: Vec<Tag> = history
|
||||
.redeemed
|
||||
.iter()
|
||||
.map(|id| Tag::custom("e", [id.to_hex(), String::new(), "redeemed".to_string()]))
|
||||
.collect();
|
||||
|
||||
if let Some(sender) = history.sender {
|
||||
tags.push(Tag::custom("p", [sender.to_hex()]));
|
||||
}
|
||||
|
||||
let content = signer
|
||||
.nip44_encrypt_async(me, &serde_json::to_string(&rows)?)
|
||||
.await?;
|
||||
|
||||
Ok(EventBuilder::new(Kind::CashuWalletSpendingHistory, content)
|
||||
.tags(tags)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
|
||||
pub(crate) async fn build_nutzap_info_event<S>(
|
||||
signer: &S,
|
||||
mints: &[Url],
|
||||
relays: &[RelayUrl],
|
||||
wallet_pubkey: PublicKey,
|
||||
) -> Result<Event, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + ?Sized,
|
||||
{
|
||||
let mut tags: Vec<Tag> = relays
|
||||
.iter()
|
||||
.map(|relay| Tag::custom("relay", [relay.to_string()]))
|
||||
.collect();
|
||||
|
||||
for mint in mints {
|
||||
tags.push(Tag::custom("mint", [mint.to_string(), "sat".to_string()]));
|
||||
}
|
||||
|
||||
tags.push(Tag::custom(
|
||||
"pubkey",
|
||||
[format!("02{}", wallet_pubkey.to_hex())],
|
||||
));
|
||||
|
||||
Ok(EventBuilder::new(Kind::Custom(10019), "")
|
||||
.tags(tags)
|
||||
.finalize_async(signer)
|
||||
.await?)
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn parses_wallet_content() {
|
||||
let privkey = SecretKey::generate();
|
||||
let mint = Url::parse("https://mint.example.com").expect("valid mint URL");
|
||||
|
||||
let content = serde_json::to_string(&vec![
|
||||
vec!["privkey".to_string(), privkey.to_secret_hex()],
|
||||
vec!["mint".to_string(), mint.to_string()],
|
||||
])
|
||||
.expect("serialization cannot fail");
|
||||
|
||||
let (parsed_key, mints) = parse_wallet_content(&content).expect("valid content");
|
||||
assert_eq!(parsed_key.to_secret_hex(), privkey.to_secret_hex());
|
||||
assert_eq!(mints, vec![mint]);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn wallet_content_rejects_missing_privkey() {
|
||||
let mint = Url::parse("https://mint.example.com").expect("valid mint URL");
|
||||
let content = serde_json::to_string(&vec![vec!["mint".to_string(), mint.to_string()]])
|
||||
.expect("serialization cannot fail");
|
||||
|
||||
assert!(parse_wallet_content(&content).is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn seed_is_deterministic_per_key() {
|
||||
let key = SecretKey::generate();
|
||||
let first = WalletData::derive_seed(&key).expect("seed derivation cannot fail");
|
||||
let second = WalletData::derive_seed(&key).expect("seed derivation cannot fail");
|
||||
assert_eq!(first, second);
|
||||
|
||||
let other =
|
||||
WalletData::derive_seed(&SecretKey::generate()).expect("seed derivation cannot fail");
|
||||
assert_ne!(first, other);
|
||||
}
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,617 @@
|
||||
use std::collections::{HashMap, HashSet};
|
||||
use std::str::FromStr;
|
||||
use std::time::Duration;
|
||||
|
||||
use anyhow::{Error, anyhow};
|
||||
use cdk::Amount;
|
||||
use cdk::amount::SplitTarget;
|
||||
use cdk::mint_url::MintUrl;
|
||||
use cdk::nuts::nut00::KnownMethod;
|
||||
use cdk::nuts::{
|
||||
CurrencyUnit, Id, KeySetInfo, MeltQuoteState, MintQuoteState, PaymentMethod, Proof, Proofs,
|
||||
SecretKey, SpendingConditions, State,
|
||||
};
|
||||
use cdk::secret::Secret;
|
||||
use cdk::wallet::types::ProofInfo;
|
||||
use cdk::wallet::{ReceiveOptions, SendOptions, Wallet};
|
||||
use futures::StreamExt;
|
||||
use nostr::nips::nip60::{CashuProof, TokenEvent, TransactionDirection};
|
||||
use nostr_sdk::prelude::*;
|
||||
|
||||
use crate::keys;
|
||||
|
||||
/// How long to wait for relays when fetching a recipient's wallet info
|
||||
const FETCH_TIMEOUT: Duration = Duration::from_secs(5);
|
||||
|
||||
/// A job mutating the wallet store or reconciling it with relays.
|
||||
#[derive(Debug, Clone)]
|
||||
pub(crate) enum Job {
|
||||
Reconcile,
|
||||
CreateQuote {
|
||||
mint: MintUrl,
|
||||
amount: u64,
|
||||
},
|
||||
ClaimQuote {
|
||||
mint: MintUrl,
|
||||
quote_id: String,
|
||||
},
|
||||
Melt {
|
||||
mint: MintUrl,
|
||||
invoice: String,
|
||||
},
|
||||
SendToken {
|
||||
mint: MintUrl,
|
||||
amount: u64,
|
||||
},
|
||||
SendNutzap {
|
||||
recipient: PublicKey,
|
||||
amount: u64,
|
||||
target: Option<EventId>,
|
||||
comment: Option<String>,
|
||||
},
|
||||
Receive {
|
||||
mint: MintUrl,
|
||||
token: String,
|
||||
},
|
||||
RedeemNutzap {
|
||||
mint: MintUrl,
|
||||
proofs: Proofs,
|
||||
nutzap_id: EventId,
|
||||
sender: PublicKey,
|
||||
},
|
||||
}
|
||||
|
||||
impl Job {
|
||||
pub(crate) async fn run<S>(self, ctx: JobCtx<S>) -> Result<Outcome, Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + Send + Sync + 'static,
|
||||
{
|
||||
match self {
|
||||
Job::Reconcile => ctx.reconcile().await,
|
||||
Job::CreateQuote { mint, amount } => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let quote = wallet
|
||||
.mint_quote(
|
||||
PaymentMethod::Known(KnownMethod::Bolt11),
|
||||
Some(Amount::from(amount)),
|
||||
None,
|
||||
None,
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::QuoteCreated {
|
||||
mint,
|
||||
quote_id: quote.id,
|
||||
request: quote.request,
|
||||
amount,
|
||||
})
|
||||
}
|
||||
Job::ClaimQuote { mint, quote_id } => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let quote = wallet.check_mint_quote("e_id).await?;
|
||||
|
||||
if quote.state != MintQuoteState::Paid {
|
||||
return Ok(Outcome::Idle);
|
||||
}
|
||||
|
||||
let proofs = wallet.mint("e_id, SplitTarget::default(), None).await?;
|
||||
let amount: u64 = proofs.iter().map(|proof| u64::from(proof.amount)).sum();
|
||||
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint)?,
|
||||
&ctx.previous_ids(&mint),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::In,
|
||||
amount: u64::from(quote.amount.unwrap_or_default()),
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::QuoteMinted {
|
||||
quote_id,
|
||||
update,
|
||||
amount,
|
||||
})
|
||||
}
|
||||
Job::Melt { mint, invoice } => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let quote = wallet
|
||||
.melt_quote(
|
||||
PaymentMethod::Known(KnownMethod::Bolt11),
|
||||
invoice,
|
||||
None,
|
||||
None,
|
||||
)
|
||||
.await?;
|
||||
|
||||
let finalized = wallet
|
||||
.prepare_melt("e.id, HashMap::new())
|
||||
.await?
|
||||
.confirm()
|
||||
.await?;
|
||||
|
||||
if finalized.state() != MeltQuoteState::Paid {
|
||||
return Err(anyhow!("melt did not settle: {:?}", finalized.state()));
|
||||
}
|
||||
|
||||
let amount = u64::from(finalized.total_amount());
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint)?,
|
||||
&ctx.previous_ids(&mint),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::Out,
|
||||
amount,
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::Melted { update, amount })
|
||||
}
|
||||
Job::SendToken { mint, amount } => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let prepared = wallet
|
||||
.prepare_send(Amount::from(amount), SendOptions::default())
|
||||
.await?;
|
||||
let token = prepared.confirm(None).await?.to_string();
|
||||
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint)?,
|
||||
&ctx.previous_ids(&mint),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::Out,
|
||||
amount,
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::Sent { update, token })
|
||||
}
|
||||
Job::SendNutzap {
|
||||
recipient,
|
||||
amount,
|
||||
target,
|
||||
comment,
|
||||
} => {
|
||||
let (mint_url, mint_tag, p2pk) = recipient_wallet_info(&ctx, recipient).await?;
|
||||
let wallet = ctx.wallet(&mint_url)?;
|
||||
|
||||
let keysets = wallet
|
||||
.keysets(cdk::wallet::types::KeysetLoadPolicy::CacheOnly)
|
||||
.await?;
|
||||
|
||||
let infos: Vec<KeySetInfo> = keysets
|
||||
.iter()
|
||||
.map(|keyset| KeySetInfo {
|
||||
id: keyset.id,
|
||||
unit: keyset.unit.clone(),
|
||||
active: keyset.active.unwrap_or(true),
|
||||
input_fee_ppk: keyset.input_fee_ppk,
|
||||
final_expiry: keyset.final_expiry,
|
||||
})
|
||||
.collect();
|
||||
|
||||
let options = SendOptions {
|
||||
conditions: Some(SpendingConditions::new_p2pk(p2pk, None)),
|
||||
..Default::default()
|
||||
};
|
||||
|
||||
let token = wallet
|
||||
.prepare_send(Amount::from(amount), options)
|
||||
.await?
|
||||
.confirm(None)
|
||||
.await?;
|
||||
let proofs = token.proofs(&infos)?;
|
||||
|
||||
let mut tags = Vec::new();
|
||||
for proof in &proofs {
|
||||
tags.push(serde_json::to_string(proof)?);
|
||||
}
|
||||
|
||||
let event = keys::build_nutzap_event(
|
||||
&ctx.signer,
|
||||
recipient,
|
||||
&mint_tag,
|
||||
&tags,
|
||||
target,
|
||||
comment.as_deref().unwrap_or(""),
|
||||
)
|
||||
.await?;
|
||||
ctx.client.send_event(&event).await?;
|
||||
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint_url)?,
|
||||
&ctx.previous_ids(&mint_url),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::Out,
|
||||
amount,
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::NutzapSent { update, amount })
|
||||
}
|
||||
Job::Receive { mint, token } => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let received = wallet.receive(&token, ReceiveOptions::default()).await?;
|
||||
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint)?,
|
||||
&ctx.previous_ids(&mint),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::In,
|
||||
amount: u64::from(received),
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::Received {
|
||||
update,
|
||||
amount: u64::from(received),
|
||||
})
|
||||
}
|
||||
Job::RedeemNutzap {
|
||||
mint,
|
||||
proofs,
|
||||
nutzap_id,
|
||||
sender,
|
||||
} => {
|
||||
let wallet = ctx.wallet(&mint)?;
|
||||
let options = ReceiveOptions {
|
||||
p2pk_signing_keys: vec![ctx.wallet_key.clone()],
|
||||
..Default::default()
|
||||
};
|
||||
let received = wallet.receive_proofs(proofs, options, None, None).await?;
|
||||
|
||||
let update = ctx
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(&mint)?,
|
||||
&ctx.previous_ids(&mint),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::In,
|
||||
amount: u64::from(received),
|
||||
redeemed: vec![nutzap_id],
|
||||
sender: Some(sender),
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
Ok(Outcome::NutzapRedeemed {
|
||||
update,
|
||||
nutzap_id,
|
||||
amount: u64::from(received),
|
||||
})
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) struct TokenUpdate {
|
||||
pub(crate) event_id: EventId,
|
||||
pub(crate) token: TokenEvent,
|
||||
pub(crate) destroyed: Vec<EventId>,
|
||||
}
|
||||
|
||||
pub(crate) enum Outcome {
|
||||
/// Nothing changed (e.g. an unpaid quote)
|
||||
Idle,
|
||||
/// Token events published by a reconcile pass
|
||||
Reconciled {
|
||||
updates: Vec<TokenUpdate>,
|
||||
},
|
||||
QuoteCreated {
|
||||
mint: MintUrl,
|
||||
quote_id: String,
|
||||
request: String,
|
||||
amount: u64,
|
||||
},
|
||||
QuoteMinted {
|
||||
quote_id: String,
|
||||
update: TokenUpdate,
|
||||
amount: u64,
|
||||
},
|
||||
Melted {
|
||||
update: TokenUpdate,
|
||||
amount: u64,
|
||||
},
|
||||
Sent {
|
||||
update: TokenUpdate,
|
||||
token: String,
|
||||
},
|
||||
NutzapSent {
|
||||
update: TokenUpdate,
|
||||
amount: u64,
|
||||
},
|
||||
Received {
|
||||
update: TokenUpdate,
|
||||
amount: u64,
|
||||
},
|
||||
NutzapRedeemed {
|
||||
update: TokenUpdate,
|
||||
nutzap_id: EventId,
|
||||
amount: u64,
|
||||
},
|
||||
}
|
||||
|
||||
pub(crate) struct JobCtx<S> {
|
||||
pub(crate) wallets: HashMap<MintUrl, Wallet>,
|
||||
/// Wallet signing key, unlocking P2PK-locked nutzap proofs
|
||||
pub(crate) wallet_key: SecretKey,
|
||||
pub(crate) signer: S,
|
||||
pub(crate) client: Client,
|
||||
/// Relay token events at schedule time.
|
||||
pub(crate) tokens: HashMap<EventId, TokenEvent>,
|
||||
}
|
||||
|
||||
impl<S> JobCtx<S>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + Sync,
|
||||
{
|
||||
fn wallet(&self, mint: &MintUrl) -> Result<&Wallet, Error> {
|
||||
self.wallets
|
||||
.get(mint)
|
||||
.ok_or_else(|| anyhow!("no open wallet for mint {mint}"))
|
||||
}
|
||||
|
||||
fn previous_ids(&self, mint: &MintUrl) -> Vec<EventId> {
|
||||
previous_ids(&self.tokens, mint)
|
||||
}
|
||||
|
||||
/// Publish the store's current unspent set as a fresh token event.
|
||||
async fn sync_token_events(
|
||||
&self,
|
||||
wallet: &Wallet,
|
||||
mint: Url,
|
||||
previous: &[EventId],
|
||||
history: Option<keys::History>,
|
||||
) -> Result<TokenUpdate, Error> {
|
||||
let me = self.signer.get_public_key_async().await?;
|
||||
let unspent = wallet.get_unspent_proofs().await?;
|
||||
|
||||
let proofs = unspent
|
||||
.iter()
|
||||
.map(cashu_proof)
|
||||
.collect::<Result<Vec<_>, _>>()?;
|
||||
|
||||
let mut token = TokenEvent::new(mint, proofs);
|
||||
token.del = previous.iter().map(|id| id.to_hex()).collect();
|
||||
let event = keys::build_token_event(&self.signer, &me, &token).await?;
|
||||
self.client.send_event(&event).await?;
|
||||
|
||||
if !previous.is_empty() {
|
||||
let deletion = keys::build_token_deletion(&self.signer, previous).await?;
|
||||
self.client.send_event(&deletion).await?;
|
||||
}
|
||||
|
||||
if let Some(history) = history {
|
||||
let history_event =
|
||||
keys::build_history_event(&self.signer, &me, &history, event.id, previous).await?;
|
||||
self.client.send_event(&history_event).await?;
|
||||
}
|
||||
|
||||
Ok(TokenUpdate {
|
||||
event_id: event.id,
|
||||
token,
|
||||
destroyed: previous.to_vec(),
|
||||
})
|
||||
}
|
||||
|
||||
/// Claim paid quotes, then converge each mint.
|
||||
async fn reconcile(self) -> Result<Outcome, Error> {
|
||||
let mut tokens = self.tokens.clone();
|
||||
let mut updates = Vec::new();
|
||||
|
||||
for (mint_url, wallet) in &self.wallets {
|
||||
if let Err(error) = wallet.recover_incomplete_sagas().await {
|
||||
log::warn!("saga recovery failed for {mint_url}: {error:#}");
|
||||
}
|
||||
|
||||
let minted = wallet.mint_unissued_quotes().await?;
|
||||
if minted == Amount::ZERO {
|
||||
continue;
|
||||
}
|
||||
|
||||
let update = self
|
||||
.sync_token_events(
|
||||
wallet,
|
||||
nostr_mint(mint_url)?,
|
||||
&previous_ids(&tokens, mint_url),
|
||||
Some(keys::History {
|
||||
direction: TransactionDirection::In,
|
||||
amount: u64::from(minted),
|
||||
redeemed: Vec::new(),
|
||||
sender: None,
|
||||
}),
|
||||
)
|
||||
.await?;
|
||||
|
||||
for id in &update.destroyed {
|
||||
tokens.remove(id);
|
||||
}
|
||||
tokens.insert(update.event_id, update.token.clone());
|
||||
updates.push(update);
|
||||
}
|
||||
|
||||
for (mint_url, wallet) in &self.wallets {
|
||||
let mut relay_ys = HashSet::new();
|
||||
let mut added = Vec::new();
|
||||
|
||||
for token in tokens
|
||||
.values()
|
||||
.filter(|token| token.mint.as_str() == mint_url.to_string())
|
||||
{
|
||||
for proof in &token.proofs {
|
||||
let info = match proof_info(proof, mint_url) {
|
||||
Ok(info) => info,
|
||||
Err(error) => {
|
||||
log::warn!("skipping proof: {error:#}");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
if relay_ys.insert(info.y) {
|
||||
added.push(info);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let unspent = wallet.get_unspent_proofs().await?;
|
||||
let removed = unspent
|
||||
.iter()
|
||||
.filter(|proof| match proof.y() {
|
||||
Ok(y) => !relay_ys.contains(&y),
|
||||
Err(_) => false,
|
||||
})
|
||||
.map(|proof| proof.y())
|
||||
.collect::<Result<Vec<_>, _>>()?;
|
||||
|
||||
wallet.localstore.update_proofs(added, removed).await?;
|
||||
}
|
||||
|
||||
Ok(Outcome::Reconciled { updates })
|
||||
}
|
||||
}
|
||||
|
||||
fn previous_ids(tokens: &HashMap<EventId, TokenEvent>, mint: &MintUrl) -> Vec<EventId> {
|
||||
tokens
|
||||
.iter()
|
||||
.filter(|(_, token)| token.mint.as_str() == mint.to_string())
|
||||
.map(|(id, _)| *id)
|
||||
.collect()
|
||||
}
|
||||
|
||||
/// Resolve a recipient's 10019 wallet info and pick a mint we share with them.
|
||||
async fn recipient_wallet_info<S>(
|
||||
ctx: &JobCtx<S>,
|
||||
recipient: PublicKey,
|
||||
) -> Result<(MintUrl, String, cdk::nuts::PublicKey), Error>
|
||||
where
|
||||
S: AsyncGetPublicKey + AsyncSignEvent + AsyncNip44 + Sync,
|
||||
{
|
||||
let filter = Filter::new()
|
||||
.author(recipient)
|
||||
.kind(Kind::Custom(10019))
|
||||
.limit(1);
|
||||
|
||||
let info = match ctx
|
||||
.client
|
||||
.database()
|
||||
.query(filter.clone())
|
||||
.await?
|
||||
.into_iter()
|
||||
.next()
|
||||
{
|
||||
Some(event) => event,
|
||||
None => {
|
||||
let mut stream = ctx
|
||||
.client
|
||||
.stream_events(filter)
|
||||
.timeout(FETCH_TIMEOUT)
|
||||
.await?;
|
||||
let mut found: Option<Event> = None;
|
||||
|
||||
while let Some((_url, result)) = stream.next().await {
|
||||
if let Ok(event) = result {
|
||||
let newer = found
|
||||
.as_ref()
|
||||
.is_none_or(|current| event.created_at > current.created_at);
|
||||
|
||||
if newer {
|
||||
found = Some(event);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
found.ok_or_else(|| anyhow!("recipient has no wallet info"))?
|
||||
}
|
||||
};
|
||||
|
||||
let (p2pk, mints) = parse_nutzap_info(&info)?;
|
||||
|
||||
for mint in mints {
|
||||
let Ok(mint_url) = MintUrl::from_str(&mint) else {
|
||||
continue;
|
||||
};
|
||||
|
||||
if ctx.wallets.contains_key(&mint_url) {
|
||||
return Ok((mint_url, mint, p2pk));
|
||||
}
|
||||
}
|
||||
|
||||
Err(anyhow!("no shared mint with the recipient"))
|
||||
}
|
||||
|
||||
fn parse_nutzap_info(event: &Event) -> Result<(cdk::nuts::PublicKey, Vec<String>), Error> {
|
||||
let mut p2pk = None;
|
||||
let mut mints = Vec::new();
|
||||
|
||||
for tag in event.tags.iter() {
|
||||
let Some(value) = tag.content() else {
|
||||
continue;
|
||||
};
|
||||
|
||||
match tag.kind() {
|
||||
"pubkey" if p2pk.is_none() => {
|
||||
p2pk = Some(cdk::nuts::PublicKey::from_str(value)?);
|
||||
}
|
||||
"mint" => mints.push(value.to_string()),
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
let Some(p2pk) = p2pk else {
|
||||
return Err(anyhow!("recipient has no wallet pubkey"));
|
||||
};
|
||||
|
||||
Ok((p2pk, mints))
|
||||
}
|
||||
|
||||
fn cashu_proof(proof: &Proof) -> Result<CashuProof, Error> {
|
||||
Ok(CashuProof {
|
||||
id: proof.keyset_id.to_string(),
|
||||
amount: u64::from(proof.amount),
|
||||
secret: proof.secret.to_string(),
|
||||
c: proof.c.to_string(),
|
||||
})
|
||||
}
|
||||
|
||||
fn nostr_mint(mint: &MintUrl) -> Result<Url, Error> {
|
||||
Url::parse(&mint.to_string()).map_err(|error| anyhow!("invalid mint url: {error}"))
|
||||
}
|
||||
|
||||
fn proof_info(proof: &CashuProof, mint: &MintUrl) -> Result<ProofInfo, Error> {
|
||||
let keyset_id = Id::from_str(&proof.id)?;
|
||||
let c = cdk::nuts::PublicKey::from_str(&proof.c)?;
|
||||
let info = ProofInfo::new(
|
||||
Proof::new(
|
||||
Amount::from(proof.amount),
|
||||
keyset_id,
|
||||
Secret::new(proof.secret.clone()),
|
||||
c,
|
||||
),
|
||||
mint.clone(),
|
||||
State::Unspent,
|
||||
CurrencyUnit::Sat,
|
||||
)?;
|
||||
|
||||
Ok(info)
|
||||
}
|
||||
Reference in New Issue
Block a user