Handle signing batches in the processor

Duplicates the existing signer for one tailored to batch signing.

processor/src/coins/bitcoin.rs

@@ -1,4 +1,8 @@
-use std::{io, collections::HashMap};
+use std::{
+  time::{SystemTime, Duration},
+  io,
+  collections::HashMap,
+};
 
 use async_trait::async_trait;
 
@@ -10,7 +14,7 @@ use frost::{
   ThresholdKeys,
 };
 
-use tokio::time::{Duration, sleep};
+use tokio::time::sleep;
 
 use bitcoin_serai::{
   bitcoin::{
@@ -197,6 +201,9 @@ impl BlockTrait<Bitcoin> for Block {
     hash.reverse();
     hash
   }
+  fn time(&self) -> SystemTime {
+    SystemTime::UNIX_EPOCH + Duration::from_secs(self.header.time.into())
+  }
   fn median_fee(&self) -> Fee {
     // TODO
     Fee(20)

processor/src/coins/mod.rs

@@ -1,5 +1,5 @@
 use core::fmt::Debug;
-use std::{collections::HashMap, io};
+use std::{time::SystemTime, io, collections::HashMap};
 
 use async_trait::async_trait;
 use thiserror::Error;
@@ -160,6 +160,7 @@ pub trait Block<C: Coin>: Send + Sync + Sized + Clone + Debug {
   // This is currently bounded to being 32-bytes.
   type Id: 'static + Id;
   fn id(&self) -> Self::Id;
+  fn time(&self) -> SystemTime;
   fn median_fee(&self) -> C::Fee;
 }
 

processor/src/coins/monero.rs

@@ -1,4 +1,8 @@
-use std::{time::Duration, collections::HashMap, io};
+use std::{
+  time::{SystemTime, Duration},
+  collections::HashMap,
+  io,
+};
 
 use async_trait::async_trait;
 
@@ -142,6 +146,10 @@ impl BlockTrait<Monero> for Block {
     self.0
   }
 
+  fn time(&self) -> SystemTime {
+    SystemTime::UNIX_EPOCH + Duration::from_secs(self.1.header.timestamp)
+  }
+
   fn median_fee(&self) -> Fee {
     // TODO
     Fee { per_weight: 80000, mask: 10000 }