Ethereum relayer server

Causes send test to pass for the processor.

orchestration/src/ethereum_relayer.rs

@@ -0,0 +1,39 @@
+use std::path::Path;
+
+use crate::{Network, Os, mimalloc, os, build_serai_service, write_dockerfile};
+
+pub fn ethereum_relayer(orchestration_path: &Path, network: Network) {
+  let setup = mimalloc(Os::Debian).to_string() +
+    &build_serai_service("", network.release(), network.db(), "serai-ethereum-relayer");
+
+  let env_vars = [
+    ("DB_PATH", "/volume/ethereum-relayer-db".to_string()),
+    ("RUST_LOG", "info,serai_ethereum_relayer=trace".to_string()),
+  ];
+  let mut env_vars_str = String::new();
+  for (env_var, value) in env_vars {
+    env_vars_str += &format!(r#"{env_var}=${{{env_var}:="{value}"}} "#);
+  }
+
+  let run_ethereum_relayer = format!(
+    r#"
+# Copy the relayer server binary and relevant license
+COPY --from=builder --chown=ethereumrelayer /serai/bin/serai-ethereum-relayer /bin
+
+# Run ethereum-relayer
+EXPOSE 20830
+EXPOSE 20831
+CMD {env_vars_str} serai-ethereum-relayer
+"#
+  );
+
+  let run = os(Os::Debian, "", "ethereumrelayer") + &run_ethereum_relayer;
+  let res = setup + &run;
+
+  let mut ethereum_relayer_path = orchestration_path.to_path_buf();
+  ethereum_relayer_path.push("coins");
+  ethereum_relayer_path.push("ethereum-relayer");
+  ethereum_relayer_path.push("Dockerfile");
+
+  write_dockerfile(ethereum_relayer_path, &res);
+}

orchestration/src/main.rs

@@ -32,6 +32,9 @@ use mimalloc::mimalloc;
 mod coins;
 use coins::*;
 
+mod ethereum_relayer;
+use ethereum_relayer::ethereum_relayer;
+
 mod message_queue;
 use message_queue::message_queue;
 
@@ -280,6 +283,8 @@ fn dockerfiles(network: Network) {
   let ethereum_key = infrastructure_keys.remove("ethereum").unwrap();
   let monero_key = infrastructure_keys.remove("monero").unwrap();
 
+  ethereum_relayer(&orchestration_path, network);
+
   message_queue(
     &orchestration_path,
     network,
@@ -363,6 +368,7 @@ fn start(network: Network, services: HashSet<String>) {
     let name = match service.as_ref() {
       "serai" => "serai",
       "coordinator" => "coordinator",
+      "ethereum-relayer" => "ethereum-relayer",
       "message-queue" => "message-queue",
       "bitcoin-daemon" => "bitcoin",
       "bitcoin-processor" => "bitcoin-processor",
@@ -495,6 +501,10 @@ fn start(network: Network, services: HashSet<String>) {
             command
           }
         }
+        "ethereum-relayer" => {
+          // Expose the router command fetch server
+          command.arg("-p").arg("20831:20831")
+        }
         "monero" => {
           // Expose the RPC for tests
           if network == Network::Dev {
@@ -561,6 +571,9 @@ Commands:
     - `message-queue`
     - `bitcoin-daemon`
     - `bitcoin-processor`
+    - `ethereum-daemon`
+    - `ethereum-processor`
+    - `ethereum-relayer`
     - `monero-daemon`
     - `monero-processor`
     - `monero-wallet-rpc` (if "dev")
@@ -593,6 +606,9 @@ Commands:
     Some("start") => {
       let mut services = HashSet::new();
       for arg in args {
+        if arg == "ethereum-processor" {
+          services.insert("ethereum-relayer".to_string());
+        }
         if let Some(ext_network) = arg.strip_suffix("-processor") {
           services.insert(ext_network.to_string() + "-daemon");
         }

orchestration/src/processor.rs

@@ -41,24 +41,32 @@ RUN apt install -y ca-certificates
   const RPC_PASS: &str = "seraidex";
   // TODO: Isolate networks
   let hostname = format!("serai-{}-{coin}", network.label());
-  let port = match coin {
-    "bitcoin" => 8332,
-    "ethereum" => 8545,
-    "monero" => 18081,
-    _ => panic!("unrecognized external network"),
-  };
+  let port = format!(
+    "{}",
+    match coin {
+      "bitcoin" => 8332,
+      "ethereum" => 8545,
+      "monero" => 18081,
+      _ => panic!("unrecognized external network"),
+    }
+  );
 
-  let env_vars = [
+  let mut env_vars = vec![
     ("MESSAGE_QUEUE_RPC", format!("serai-{}-message-queue", network.label())),
     ("MESSAGE_QUEUE_KEY", hex::encode(coin_key.to_repr())),
     ("ENTROPY", hex::encode(entropy.as_ref())),
     ("NETWORK", coin.to_string()),
     ("NETWORK_RPC_LOGIN", format!("{RPC_USER}:{RPC_PASS}")),
     ("NETWORK_RPC_HOSTNAME", hostname),
-    ("NETWORK_RPC_PORT", format!("{port}")),
+    ("NETWORK_RPC_PORT", port),
     ("DB_PATH", "/volume/processor-db".to_string()),
     ("RUST_LOG", "info,serai_processor=debug".to_string()),
   ];
+  if coin == "ethereum" {
+    env_vars
+      .push(("ETHEREUM_RELAYER_HOSTNAME", format!("serai-{}-ethereum-relayer", network.label())));
+    env_vars.push(("ETHEREUM_RELAYER_PORT", "20830".to_string()));
+  }
   let mut env_vars_str = String::new();
   for (env_var, value) in env_vars {
     env_vars_str += &format!(r#"{env_var}=${{{env_var}:="{value}"}} "#);