Update the processor to use the coin's specified fee

processor/src/coins/monero.rs

@@ -13,7 +13,7 @@ use monero_serai::{
   frost::Ed25519,
   transaction::{Timelock, Transaction},
   rpc::Rpc,
-  wallet::{SpendableOutput, SignableTransaction as MSignableTransaction, TransactionMachine}
+  wallet::{Fee, SpendableOutput, SignableTransaction as MSignableTransaction, TransactionMachine}
 };
 
 use crate::{Transcript, CoinError, Output as OutputTrait, Coin, view_key};
@@ -59,7 +59,7 @@ pub struct SignableTransaction(
 
 #[derive(Clone, Debug)]
 pub struct Monero {
-  rpc: Rpc,
+  pub(crate) rpc: Rpc,
   view: Scalar,
   view_pub: PublicKey
 }
@@ -79,6 +79,7 @@ impl Monero {
 impl Coin for Monero {
   type Curve = Ed25519;
 
+  type Fee = Fee;
   type Transaction = Transaction;
   type Block = Vec<Transaction>;
 
@@ -132,7 +133,8 @@ impl Coin for Monero {
     transcript: Transcript,
     height: usize,
     mut inputs: Vec<Output>,
-    payments: &[(Address, u64)]
+    payments: &[(Address, u64)],
+    fee: Fee
   ) -> Result<SignableTransaction, CoinError> {
     let spend = keys.group_key();
     Ok(
@@ -143,8 +145,8 @@ impl Coin for Monero {
         MSignableTransaction::new(
           inputs.drain(..).map(|input| input.0).collect(),
           payments.to_vec(),
-          self.address(spend),
-          100000000 // TODO
+          Some(self.address(spend)),
+          fee
         ).map_err(|_| CoinError::ConnectionError)?
       )
     )
@@ -156,7 +158,6 @@ impl Coin for Monero {
     included: &[u16]
   ) -> Result<Self::TransactionMachine, CoinError> {
     transaction.3.clone().multisig(
-      &mut OsRng,
       &self.rpc,
       (*transaction.0).clone(),
       transaction.1.clone(),
@@ -213,8 +214,8 @@ impl Coin for Monero {
     let tx = MSignableTransaction::new(
       outputs,
       vec![(address, amount - fee)],
-      temp,
-      fee / 2000
+      Some(temp),
+      self.rpc.get_fee().await.unwrap()
     ).unwrap().sign(&mut OsRng, &self.rpc, &Scalar::one()).await.unwrap();
     self.rpc.publish_transaction(&tx).await.unwrap();
     self.mine_block(temp).await;

processor/src/lib.rs

@@ -51,6 +51,7 @@ pub trait Output: Sized + Clone {
 pub trait Coin {
   type Curve: Curve;
 
+  type Fee: Copy;
   type Transaction;
   type Block;
 
@@ -82,7 +83,8 @@ pub trait Coin {
     transcript: Transcript,
     height: usize,
     inputs: Vec<Self::Output>,
-    payments: &[(Self::Address, u64)]
+    payments: &[(Self::Address, u64)],
+    fee: Self::Fee
   ) -> Result<Self::SignableTransaction, CoinError>;
 
   async fn attempt_send(

processor/src/scanner.rs

@@ -1,5 +0,0 @@
-struct Scanner<C: Coin> {}
-
-impl Scanner {
-
-}

processor/src/tests/mod.rs

@@ -57,16 +57,17 @@ impl Network for LocalNetwork {
   }
 }
 
-async fn test_send<C: Coin + Clone>(coin: C) {
+async fn test_send<C: Coin + Clone>(coin: C, fee: C::Fee) {
   // Mine a block so there's a confirmed height
   coin.mine_block(coin.address(<C::Curve as Curve>::G::generator())).await;
   let height = coin.get_height().await.unwrap();
 
-  let mut networks = LocalNetwork::new(3);
-
   let mut keys = frost::tests::key_gen::<_, C::Curve>(&mut OsRng);
+  let threshold = keys[&1].params().t();
+  let mut networks = LocalNetwork::new(threshold);
+
   let mut wallets = vec![];
-  for i in 1 ..= 3 {
+  for i in 1 ..= threshold {
     let mut wallet = Wallet::new(MemCoinDb::new(), coin.clone());
     wallet.acknowledge_height(0, height);
     wallet.add_keys(
@@ -95,9 +96,12 @@ async fn test_send<C: Coin + Clone>(coin: C) {
     wallet.acknowledge_height(1, height - 10);
     let signable = wallet.prepare_sends(
       1,
-      vec![(wallet.address(), 10000000000)]
+      vec![(wallet.address(), 10000000000)],
+      fee
     ).await.unwrap().1.swap_remove(0);
-    futures.push(wallet.attempt_send(network, signable, &[1, 2, 3]));
+    futures.push(
+      wallet.attempt_send(network, signable, (1 ..= threshold).into_iter().collect::<Vec<_>>())
+    );
   }
 
   println!(
@@ -108,5 +112,7 @@ async fn test_send<C: Coin + Clone>(coin: C) {
 
 #[tokio::test]
 async fn monero() {
-  test_send(Monero::new("http://127.0.0.1:18081".to_string())).await;
+  let monero = Monero::new("http://127.0.0.1:18081".to_string());
+  let fee = monero.rpc.get_fee().await.unwrap();
+  test_send(monero, fee).await;
 }

processor/src/wallet.rs

@@ -281,7 +281,8 @@ impl<D: CoinDb, C: Coin> Wallet<D, C> {
   pub async fn prepare_sends(
     &mut self,
     canonical: usize,
-    payments: Vec<(C::Address, u64)>
+    payments: Vec<(C::Address, u64)>,
+    fee: C::Fee
   ) -> Result<(Vec<(C::Address, u64)>, Vec<C::SignableTransaction>), CoinError> {
     if payments.len() == 0 {
       return Ok((vec![], vec![]));
@@ -326,7 +327,8 @@ impl<D: CoinDb, C: Coin> Wallet<D, C> {
           transcript,
           acknowledged_height,
           inputs,
-          &outputs
+          &outputs,
+          fee
         ).await?;
         // self.db.save_tx(tx) // TODO
         txs.push(tx);
@@ -340,11 +342,11 @@ impl<D: CoinDb, C: Coin> Wallet<D, C> {
     &mut self,
     network: &mut N,
     prepared: C::SignableTransaction,
-    included: &[u16]
+    included: Vec<u16>
   ) -> Result<(Vec<u8>, Vec<<C::Output as Output>::Id>), SignError> {
     let mut attempt = self.coin.attempt_send(
       prepared,
-      included
+      &included
     ).await.map_err(|e| SignError::CoinError(e))?;
 
     let commitments = network.round(