serai/processor/monero/src/rpc.rs

use core::future::Future;

use monero_wallet::rpc::{RpcError, Rpc as RpcTrait};
use monero_simple_request_rpc::SimpleRequestRpc;

use serai_client::primitives::{NetworkId, Coin, Amount};

use scanner::ScannerFeed;
use signers::TransactionPublisher;

use crate::{
  transaction::Transaction,
  block::{BlockHeader, Block},
};

#[derive(Clone)]
pub(crate) struct Rpc {
  pub(crate) rpc: SimpleRequestRpc,
}

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 = 5;

  type Block = Block;

  type EphemeralError = RpcError;

  fn latest_finalized_block_number(
    &self,
  ) -> impl Send + Future<Output = Result<u64, Self::EphemeralError>> {
    async move {
      Ok(
        self
          .rpc
          .get_height()
          .await?
          .checked_sub(1)
          .expect("connected to an invalid Monero RPC")
          .try_into()
          .unwrap(),
      )
    }
  }

  fn time_of_block(
    &self,
    number: u64,
  ) -> impl Send + Future<Output = Result<u64, Self::EphemeralError>> {
    async move { todo!("TODO") }
  }

  fn unchecked_block_header_by_number(
    &self,
    number: u64,
  ) -> impl Send
       + Future<Output = Result<<Self::Block as primitives::Block>::Header, Self::EphemeralError>>
  {
    async move { Ok(BlockHeader(self.rpc.get_block_by_number(number.try_into().unwrap()).await?)) }
  }

  fn unchecked_block_by_number(
    &self,
    number: u64,
  ) -> impl Send + Future<Output = Result<Self::Block, Self::EphemeralError>> {
    async move { todo!("TODO") }
  }

  fn dust(coin: Coin) -> Amount {
    assert_eq!(coin, Coin::Monero);

    todo!("TODO")
  }

  fn cost_to_aggregate(
    &self,
    coin: Coin,
    _reference_block: &Self::Block,
  ) -> impl Send + Future<Output = Result<Amount, Self::EphemeralError>> {
    async move {
      assert_eq!(coin, Coin::Bitcoin);
      // TODO
      Ok(Amount(0))
    }
  }
}

impl TransactionPublisher<Transaction> for Rpc {
  type EphemeralError = RpcError;

  fn publish(
    &self,
    tx: Transaction,
  ) -> impl Send + Future<Output = Result<(), Self::EphemeralError>> {
    async move { self.rpc.publish_transaction(&tx.0).await }
  }
}