Misc continuances on the Monero processor

Cargo.lock

@@ -5105,7 +5105,6 @@ dependencies = [
  "hex",
  "modular-frost",
  "monero-address",
- "monero-clsag",
  "monero-rpc",
  "monero-serai",
  "monero-simple-request-rpc",
@@ -8524,6 +8523,7 @@ dependencies = [
  "hex",
  "log",
  "modular-frost",
+ "monero-simple-request-rpc",
  "monero-wallet",
  "parity-scale-codec",
  "rand_core",

processor/bitcoin/src/rpc.rs

@@ -21,7 +21,9 @@ pub(crate) struct Rpc<D: Db> {
 #[async_trait::async_trait]
 impl<D: Db> ScannerFeed for Rpc<D> {
   const NETWORK: NetworkId = NetworkId::Bitcoin;
+  // 6 confirmations is widely accepted as secure and shouldn't occur
   const CONFIRMATIONS: u64 = 6;
+  // The window length should be roughly an hour
   const WINDOW_LENGTH: u64 = 6;
 
   const TEN_MINUTES: u64 = 1;

processor/key-gen/src/lib.rs

@@ -43,7 +43,11 @@ pub trait KeyGenParams {
   >;
 
   /// Tweaks keys as necessary/beneficial.
-  fn tweak_keys(keys: &mut ThresholdKeys<Self::ExternalNetworkCiphersuite>);
+  ///
+  /// A default implementation which doesn't perform any tweaking is provided.
+  fn tweak_keys(keys: &mut ThresholdKeys<Self::ExternalNetworkCiphersuite>) {
+    let _ = keys;
+  }
 
   /// Encode keys as optimal.
   ///

processor/monero/Cargo.toml

@@ -31,6 +31,7 @@ dkg = { path = "../../crypto/dkg", default-features = false, features = ["std",
 frost = { package = "modular-frost", path = "../../crypto/frost", default-features = false }
 
 monero-wallet = { path = "../../networks/monero/wallet", default-features = false, features = ["std", "multisig"] }
+monero-simple-request-rpc = { path = "../../networks/monero/rpc/simple-request", default-features = false }
 
 serai-client = { path = "../../substrate/client", default-features = false, features = ["monero"] }
 

processor/monero/src/key_gen.rs

@@ -1,11 +1,8 @@
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ed25519};
-use frost::ThresholdKeys;
+use ciphersuite::Ed25519;
 
 pub(crate) struct KeyGenParams;
 impl key_gen::KeyGenParams for KeyGenParams {
   const ID: &'static str = "Monero";
 
   type ExternalNetworkCiphersuite = Ed25519;
-
-  fn tweak_keys(keys: &mut ThresholdKeys<Self::ExternalNetworkCiphersuite>) {}
 }

processor/monero/src/main.rs

@@ -11,11 +11,11 @@ use monero_wallet::rpc::Rpc as MRpc;
 mod primitives;
 pub(crate) use crate::primitives::*;
 
-/*
 mod key_gen;
 use crate::key_gen::KeyGenParams;
 mod rpc;
 use rpc::Rpc;
+/*
 mod scheduler;
 use scheduler::Scheduler;
 

processor/monero/src/rpc.rs

@@ -1,81 +1,43 @@
-use bitcoin_serai::rpc::{RpcError, Rpc as BRpc};
+use monero_wallet::rpc::{RpcError, Rpc as RpcTrait};
+use monero_simple_request_rpc::SimpleRequestRpc;
 
 use serai_client::primitives::{NetworkId, Coin, Amount};
 
-use serai_db::Db;
 use scanner::ScannerFeed;
 use signers::TransactionPublisher;
 
 use crate::{
-  db,
   transaction::Transaction,
   block::{BlockHeader, Block},
 };
 
 #[derive(Clone)]
-pub(crate) struct Rpc<D: Db> {
-  pub(crate) db: D,
-  pub(crate) rpc: BRpc,
+pub(crate) struct Rpc {
+  pub(crate) rpc: SimpleRequestRpc,
 }
 
 #[async_trait::async_trait]
-impl<D: Db> ScannerFeed for Rpc<D> {
-  const NETWORK: NetworkId = NetworkId::Bitcoin;
-  const CONFIRMATIONS: u64 = 6;
-  const WINDOW_LENGTH: u64 = 6;
+impl ScannerFeed for Rpc {
+  const NETWORK: NetworkId = NetworkId::Monero;
+  // Outputs aren't spendable until 10 blocks later due to the 10-block lock
+  // Since we assumed scanned outputs are spendable, that sets a minimum confirmation depth of 10
+  // A 10-block reorganization hasn't been observed in years and shouldn't occur
+  const CONFIRMATIONS: u64 = 10;
+  // The window length should be roughly an hour
+  const WINDOW_LENGTH: u64 = 30;
 
-  const TEN_MINUTES: u64 = 1;
+  const TEN_MINUTES: u64 = 5;
 
-  type Block = Block<D>;
+  type Block = Block;
 
   type EphemeralError = RpcError;
 
   async fn latest_finalized_block_number(&self) -> Result<u64, Self::EphemeralError> {
-    db::LatestBlockToYieldAsFinalized::get(&self.db).ok_or(RpcError::ConnectionError)
+    Ok(self.rpc.get_height().await?.checked_sub(1).expect("connected to an invalid Monero RPC").try_into().unwrap())
   }
 
   async fn time_of_block(&self, number: u64) -> Result<u64, Self::EphemeralError> {
-    let number = usize::try_from(number).unwrap();
-
-    /*
-      The block time isn't guaranteed to be monotonic. It is guaranteed to be greater than the
-      median time of prior blocks, as detailed in BIP-0113 (a BIP which used that fact to improve
-      CLTV). This creates a monotonic median time which we use as the block time.
-    */
-    // This implements `GetMedianTimePast`
-    let median = {
-      const MEDIAN_TIMESPAN: usize = 11;
-      let mut timestamps = Vec::with_capacity(MEDIAN_TIMESPAN);
-      for i in number.saturating_sub(MEDIAN_TIMESPAN) .. number {
-        timestamps.push(self.rpc.get_block(&self.rpc.get_block_hash(i).await?).await?.header.time);
-      }
-      timestamps.sort();
-      timestamps[timestamps.len() / 2]
-    };
-
-    /*
-      This block's timestamp is guaranteed to be greater than this median:
-        https://github.com/bitcoin/bitcoin/blob/0725a374941355349bb4bc8a79dad1affb27d3b9
-          /src/validation.cpp#L4182-L4184
-
-      This does not guarantee the median always increases however. Take the following trivial
-      example, as the window is initially built:
-
-      0 block has time 0   // Prior blocks: []
-      1 block has time 1   // Prior blocks: [0]
-      2 block has time 2   // Prior blocks: [0, 1]
-      3 block has time 2   // Prior blocks: [0, 1, 2]
-
-      These two blocks have the same time (both greater than the median of their prior blocks) and
-      the same median.
-
-      The median will never decrease however. The values pushed onto the window will always be
-      greater than the median. If a value greater than the median is popped, the median will remain
-      the same (due to the counterbalance of the pushed value). If a value less than the median is
-      popped, the median will increase (either to another instance of the same value, yet one
-      closer to the end of the repeating sequence, or to a higher value).
-    */
-    Ok(median.into())
+    todo!("TODO")
   }
 
   async fn unchecked_block_header_by_number(
@@ -83,7 +45,7 @@ impl<D: Db> ScannerFeed for Rpc<D> {
     number: u64,
   ) -> Result<<Self::Block as primitives::Block>::Header, Self::EphemeralError> {
     Ok(BlockHeader(
-      self.rpc.get_block(&self.rpc.get_block_hash(number.try_into().unwrap()).await?).await?.header,
+      self.rpc.get_block_by_number(number.try_into().unwrap()).await?
     ))
   }
 
@@ -91,48 +53,13 @@ impl<D: Db> ScannerFeed for Rpc<D> {
     &self,
     number: u64,
   ) -> Result<Self::Block, Self::EphemeralError> {
-    Ok(Block(
-      self.db.clone(),
-      self.rpc.get_block(&self.rpc.get_block_hash(number.try_into().unwrap()).await?).await?,
-    ))
+    todo!("TODO")
   }
 
   fn dust(coin: Coin) -> Amount {
-    assert_eq!(coin, Coin::Bitcoin);
+    assert_eq!(coin, Coin::Monero);
 
-    /*
-      A Taproot input is:
-      - 36 bytes for the OutPoint
-      - 0 bytes for the script (+1 byte for the length)
-      - 4 bytes for the sequence
-      Per https://developer.bitcoin.org/reference/transactions.html#raw-transaction-format
-
-      There's also:
-      - 1 byte for the witness length
-      - 1 byte for the signature length
-      - 64 bytes for the signature
-      which have the SegWit discount.
-
-      (4 * (36 + 1 + 4)) + (1 + 1 + 64) = 164 + 66 = 230 weight units
-      230 ceil div 4 = 57 vbytes
-
-      Bitcoin defines multiple minimum feerate constants *per kilo-vbyte*. Currently, these are:
-      - 1000 sat/kilo-vbyte for a transaction to be relayed
-      - Each output's value must exceed the fee of the TX spending it at 3000 sat/kilo-vbyte
-      The DUST constant needs to be determined by the latter.
-      Since these are solely relay rules, and may be raised, we require all outputs be spendable
-      under a 5000 sat/kilo-vbyte fee rate.
-
-      5000 sat/kilo-vbyte = 5 sat/vbyte
-      5 * 57 = 285 sats/spent-output
-
-      Even if an output took 100 bytes (it should be just ~29-43), taking 400 weight units, adding
-      100 vbytes, tripling the transaction size, then the sats/tx would be < 1000.
-
-      Increase by an order of magnitude, in order to ensure this is actually worth our time, and we
-      get 10,000 satoshis. This is $5 if 1 BTC = 50,000 USD.
-    */
-    Amount(10_000)
+    todo!("TODO")
   }
 
   async fn cost_to_aggregate(
@@ -147,10 +74,10 @@ impl<D: Db> ScannerFeed for Rpc<D> {
 }
 
 #[async_trait::async_trait]
-impl<D: Db> TransactionPublisher<Transaction> for Rpc<D> {
+impl TransactionPublisher<Transaction> for Rpc {
   type EphemeralError = RpcError;
 
   async fn publish(&self, tx: Transaction) -> Result<(), Self::EphemeralError> {
-    self.rpc.send_raw_transaction(&tx.0).await.map(|_| ())
+    self.rpc.publish_transaction(&tx.0).await
   }
 }

processor/monero/src/scheduler.rs

@@ -14,7 +14,6 @@ use serai_db::Db;
 use primitives::{OutputType, ReceivedOutput, Payment};
 use scanner::{KeyFor, AddressFor, OutputFor, BlockFor};
 use utxo_scheduler::{PlannedTransaction, TransactionPlanner};
-use transaction_chaining_scheduler::{EffectedReceivedOutputs, Scheduler as GenericScheduler};
 
 use crate::{
   scan::{offsets_for_key, scanner},
@@ -40,11 +39,11 @@ fn signable_transaction<D: Db>(
 ) -> Result<(SignableTransaction, BSignableTransaction), TransactionError> {
   assert!(
     inputs.len() <
-      <Planner as TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>>>::MAX_INPUTS
+      <Planner as TransactionPlanner<Rpc<D>, ()>>::MAX_INPUTS
   );
   assert!(
     (payments.len() + usize::from(u8::from(change.is_some()))) <
-      <Planner as TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>>>::MAX_OUTPUTS
+      <Planner as TransactionPlanner<Rpc<D>, ()>>::MAX_OUTPUTS
   );
 
   let inputs = inputs.into_iter().map(|input| input.output).collect::<Vec<_>>();
@@ -73,7 +72,7 @@ fn signable_transaction<D: Db>(
   ));
 
   let change = change
-    .map(<Planner as TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>>>::change_address);
+    .map(<Planner as TransactionPlanner<Rpc<D>, ()>>::change_address);
 
   BSignableTransaction::new(
     inputs.clone(),
@@ -90,7 +89,7 @@ fn signable_transaction<D: Db>(
 }
 
 pub(crate) struct Planner;
-impl<D: Db> TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>> for Planner {
+impl TransactionPlanner<Rpc, ()> for Planner {
   type FeeRate = u64;
 
   type SignableTransaction = SignableTransaction;
@@ -157,7 +156,7 @@ impl<D: Db> TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>> for Plan
     inputs: Vec<OutputFor<Rpc<D>>>,
     payments: Vec<Payment<AddressFor<Rpc<D>>>>,
     change: Option<KeyFor<Rpc<D>>>,
-  ) -> PlannedTransaction<Rpc<D>, Self::SignableTransaction, EffectedReceivedOutputs<Rpc<D>>> {
+  ) -> PlannedTransaction<Rpc<D>, Self::SignableTransaction, ()> {
     let key = inputs.first().unwrap().key();
     for input in &inputs {
       assert_eq!(key, input.key());
@@ -168,23 +167,7 @@ impl<D: Db> TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>> for Plan
       Ok(tx) => PlannedTransaction {
         signable: tx.0,
         eventuality: Eventuality { txid: tx.1.txid(), singular_spent_output },
-        auxilliary: EffectedReceivedOutputs({
-          let tx = tx.1.transaction();
-          let scanner = scanner(key);
-
-          let mut res = vec![];
-          for output in scanner.scan_transaction(tx) {
-            res.push(Output::new_with_presumed_origin(
-              key,
-              tx,
-              // It shouldn't matter if this is wrong as we should never try to return these
-              // We still provide an accurate value to ensure a lack of discrepancies
-              Some(Address::new(inputs[0].output.output().script_pubkey.clone()).unwrap()),
-              output,
-            ));
-          }
-          res
-        }),
+        auxilliary: (),
       },
       Err(
         TransactionError::NoInputs | TransactionError::NoOutputs | TransactionError::DustPayment,
@@ -202,4 +185,4 @@ impl<D: Db> TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>> for Plan
   }
 }
 
-pub(crate) type Scheduler<D> = GenericScheduler<Rpc<D>, Planner>;
+pub(crate) type Scheduler = utxo_standard_scheduler::Scheduler<Rpc, Planner>;

processor/scanner/src/lib.rs

@@ -67,6 +67,12 @@ pub trait ScannerFeed: 'static + Send + Sync + Clone {
   /// The amount of confirmations a block must have to be considered finalized.
   ///
   /// This value must be at least `1`.
+  // This is distinct from `WINDOW_LENGTH` as it's only used for determining the lifetime of the
+  // key. The key switches to various stages of its lifetime depending on when user transactions
+  // will hit the Serai network (relative to the time they're made) and when outputs created by
+  // Serai become available again. If we set a long WINDOW_LENGTH, say two hours, that doesn't mean
+  // we expect user transactions made within a few minutes of a new key being declared to only
+  // appear in finalized blocks two hours later.
   const CONFIRMATIONS: u64;
 
   /// The amount of blocks to process in parallel.