Allow projection actor to retrieve latest Cfd state itself from DB

Instead of retrieving Cfds inside Cfd actors, send a msg that they changed and
retrieve them by the projection actor itself.

daemon/src/cfd_actors.rs

@@ -4,15 +4,13 @@ use anyhow::{bail, Context, Result};
 use sqlx::pool::PoolConnection;
 use sqlx::Sqlite;
 
-pub async fn insert_cfd_and_send_to_feed(
+pub async fn insert_cfd_and_update_feed(
     cfd: &Cfd,
     conn: &mut PoolConnection<Sqlite>,
     projection_address: &xtra::Address<projection::Actor>,
 ) -> Result<()> {
     db::insert_cfd(cfd, conn).await?;
-    projection_address
+    projection_address.send(projection::CfdsChanged).await??;
-        .send(projection::Update(db::load_all_cfds(conn).await?))
-        .await?;
     Ok(())
 }
 
@@ -22,9 +20,7 @@ pub async fn append_cfd_state(
     projection_address: &xtra::Address<projection::Actor>,
 ) -> Result<()> {
     db::append_cfd_state(cfd, conn).await?;
-    projection_address
+    projection_address.send(projection::CfdsChanged).await??;
-        .send(projection::Update(db::load_all_cfds(conn).await?))
-        .await?;
     Ok(())
 }
 

daemon/src/maker.rs

@@ -4,7 +4,6 @@ use bdk::bitcoin::Amount;
 use bdk::{bitcoin, FeeRate};
 use clap::{Parser, Subcommand};
 use daemon::auth::{self, MAKER_USERNAME};
-use daemon::db::load_all_cfds;
 use daemon::model::cfd::Role;
 use daemon::model::WalletInfo;
 use daemon::seed::Seed;
@@ -276,14 +275,8 @@ async fn main() -> Result<()> {
         .send(bitmex_price_feed::Connect)
         .await??;
 
-    let cfds = {
-        let mut conn = db.acquire().await?;
-
-        load_all_cfds(&mut conn).await?
-    };
-
     let (proj_actor, projection_feeds) =
-        projection::Actor::new(Role::Maker, bitcoin_network, cfds, init_quote);
+        projection::Actor::new(db.clone(), Role::Maker, bitcoin_network, init_quote).await?;
     tasks.add(projection_context.run(proj_actor));
 
     let listener_stream = futures::stream::poll_fn(move |ctx| {

daemon/src/maker_cfd.rs

@@ -1,5 +1,5 @@
 use crate::address_map::{AddressMap, Stopping};
-use crate::cfd_actors::{self, append_cfd_state, insert_cfd_and_send_to_feed};
+use crate::cfd_actors::{self, append_cfd_state, insert_cfd_and_update_feed};
 use crate::db::{insert_order, load_cfd_by_order_id, load_order_by_id};
 use crate::model::cfd::{
     Cfd, CfdState, CfdStateCommon, CollaborativeSettlement, Dlc, Order, OrderId, Origin, Role,
@@ -478,7 +478,7 @@ where
                 taker_id,
             },
         );
-        insert_cfd_and_send_to_feed(&cfd, &mut conn, &self.projection_actor).await?;
+        insert_cfd_and_update_feed(&cfd, &mut conn, &self.projection_actor).await?;
 
         // 4. Try to get the oracle announcement, if that fails we should exit prior to changing any
         // state

daemon/src/projection.rs

@@ -5,7 +5,7 @@ use crate::model::cfd::{
     UpdateCfdProposal,
 };
 use crate::model::{Leverage, Position, Timestamp, TradingPair};
-use crate::{bitmex_price_feed, model, tx, Order, UpdateCfdProposals};
+use crate::{bitmex_price_feed, db, model, tx, Order, UpdateCfdProposals};
 use anyhow::Result;
 use bdk::bitcoin::{Amount, Network, SignedAmount};
 use itertools::Itertools;
@@ -31,7 +31,12 @@ pub struct UpdateRollOverProposal {
 /// (replaces previously stored values)
 pub struct Update<T>(pub T);
 
+/// Message indicating that the Cfds in the projection need to be reloaded, as at
+/// least one of the Cfds has changed.
+pub struct CfdsChanged;
+
 pub struct Actor {
+    db: sqlx::SqlitePool,
     tx: Tx,
     state: State,
 }
@@ -44,12 +49,15 @@ pub struct Feeds {
 }
 
 impl Actor {
-    pub fn new(
+    pub async fn new(
+        db: sqlx::SqlitePool,
         role: Role,
         network: Network,
-        init_cfds: Vec<ModelCfd>,
         init_quote: bitmex_price_feed::Quote,
-    ) -> (Self, Feeds) {
+    ) -> Result<(Self, Feeds)> {
+        let mut conn = db.acquire().await?;
+        let init_cfds = db::load_all_cfds(&mut conn).await?;
+
         let state = State {
             role,
             network,
@@ -63,8 +71,9 @@ impl Actor {
         let (tx_quote, rx_quote) = watch::channel(init_quote.into());
         let (tx_connected_takers, rx_connected_takers) = watch::channel(Vec::new());
 
-        (
+        Ok((
             Self {
+                db,
                 tx: Tx {
                     cfds: tx_cfds,
                     order: tx_order,
@@ -79,7 +88,7 @@ impl Actor {
                 quote: rx_quote,
                 connected_takers: rx_connected_takers,
             },
-        )
+        ))
     }
 }
 
@@ -153,6 +162,13 @@ impl State {
 
 #[xtra_productivity]
 impl Actor {
+    fn handle(&mut self, _: CfdsChanged) -> Result<()> {
+        let mut conn = self.db.acquire().await?;
+        let cfds = db::load_all_cfds(&mut conn).await?;
+        self.state.update_cfds(cfds);
+        let _ = self.tx.cfds.send(self.state.to_cfds());
+        Ok(())
+    }
     fn handle(&mut self, msg: Update<Option<Order>>) {
         let _ = self.tx.order.send(msg.0.map(|x| x.into()));
     }
@@ -162,10 +178,6 @@ impl Actor {
         let _ = self.tx.quote.send(quote.into());
         let _ = self.tx.cfds.send(self.state.to_cfds());
     }
-    fn handle(&mut self, msg: Update<Vec<ModelCfd>>) {
-        self.state.update_cfds(msg.0);
-        let _ = self.tx.cfds.send(self.state.to_cfds());
-    }
     fn handle(&mut self, msg: Update<Vec<model::Identity>>) {
         let _ = self
             .tx

daemon/src/taker.rs

@@ -4,7 +4,6 @@ use bdk::bitcoin::{Address, Amount};
 use bdk::{bitcoin, FeeRate};
 use clap::{Parser, Subcommand};
 use daemon::connection::connect;
-use daemon::db::load_all_cfds;
 use daemon::model::cfd::Role;
 use daemon::model::{Identity, WalletInfo};
 use daemon::seed::Seed;
@@ -259,14 +258,8 @@ async fn main() -> Result<()> {
         .send(bitmex_price_feed::Connect)
         .await??;
 
-    let cfds = {
-        let mut conn = db.acquire().await?;
-
-        load_all_cfds(&mut conn).await?
-    };
-
     let (proj_actor, projection_feeds) =
-        projection::Actor::new(Role::Taker, bitcoin_network, cfds, init_quote);
+        projection::Actor::new(db.clone(), Role::Taker, bitcoin_network, init_quote).await?;
     tasks.add(projection_context.run(proj_actor));
 
     let possible_addresses = resolve_maker_addresses(&opts.maker).await?;

daemon/src/taker_cfd.rs

@@ -1,5 +1,5 @@
 use crate::address_map::AddressMap;
-use crate::cfd_actors::{self, append_cfd_state, insert_cfd_and_send_to_feed};
+use crate::cfd_actors::{self, append_cfd_state, insert_cfd_and_update_feed};
 use crate::db::{insert_order, load_cfd_by_order_id, load_order_by_id};
 use crate::model::cfd::{
     Cfd, CfdState, CfdStateCommon, Completed, Dlc, Order, OrderId, Origin, Role, RollOverProposal,
@@ -416,7 +416,7 @@ where
             CfdState::outgoing_order_request(),
         );
 
-        insert_cfd_and_send_to_feed(&cfd, &mut conn, &self.projection_actor).await?;
+        insert_cfd_and_update_feed(&cfd, &mut conn, &self.projection_actor).await?;
 
         // Cleanup own order feed, after inserting the cfd.
         // Due to the 1:1 relationship between order and cfd we can never create another cfd for the

daemon/tests/harness/mod.rs

@@ -147,7 +147,7 @@ impl Maker {
         // system startup sends sync messages, mock them
         mocks.mock_sync_handlers().await;
         let maker = daemon::MakerActorSystem::new(
-            db,
+            db.clone(),
             wallet_addr,
             config.oracle_pk,
             |_, _| oracle,
@@ -169,7 +169,9 @@ impl Maker {
         .unwrap();
 
         let (proj_actor, feeds) =
-            projection::Actor::new(Role::Maker, Network::Testnet, vec![], dummy_quote());
+            projection::Actor::new(db, Role::Maker, Network::Testnet, dummy_quote())
+                .await
+                .unwrap();
         tasks.add(projection_context.run(proj_actor));
 
         let address = listener.local_addr().unwrap();
@@ -280,7 +282,7 @@ impl Taker {
         // system startup sends sync messages, mock them
         mocks.mock_sync_handlers().await;
         let taker = daemon::TakerActorSystem::new(
-            db,
+            db.clone(),
             wallet_addr,
             config.oracle_pk,
             identity_sk,
@@ -295,7 +297,9 @@ impl Taker {
         .unwrap();
 
         let (proj_actor, feeds) =
-            projection::Actor::new(Role::Taker, Network::Testnet, vec![], dummy_quote());
+            projection::Actor::new(db, Role::Taker, Network::Testnet, dummy_quote())
+                .await
+                .unwrap();
         tasks.add(projection_context.run(proj_actor));
 
         tasks.add(connect(