feat: cors (#129)

Set CORS headers in the relay service

Author: onbjerg

Cargo.lock

@@ -221,6 +221,8 @@ metrics = "0.23.0"
 metrics-derive = "0.1.0"
 
 # rpc
+tower = "0.4"
+tower-http = { version = "0.6", features = ["cors"] }
 jsonrpsee = "0.24"
 
 # misc

Cargo.toml

@@ -17,6 +17,7 @@ alloy-network.workspace = true
 alloy-primitives.workspace = true
 alloy-provider.workspace = true
 alloy-rpc-client.workspace = true
+clap = { workspace = true, features = ["derive"] }
 odyssey-node.workspace = true
 odyssey-wallet.workspace = true
 odyssey-walltime.workspace = true
@@ -27,7 +28,6 @@ reth-node-builder.workspace = true
 reth-optimism-node = { workspace = true, features = ["js-tracer"] }
 reth-optimism-cli.workspace = true
 reth-provider.workspace = true
-clap = { workspace = true, features = ["derive"] }
 
 [features]
 default = ["jemalloc"]

bin/odyssey/Cargo.toml

@@ -23,6 +23,8 @@ reth-tracing.workspace = true
 clap = { workspace = true, features = ["derive", "env"] }
 url.workspace = true
 tokio = { workspace = true, features = ["rt", "macros"] }
+tower.workspace = true
+tower-http.workspace = true
 
 [features]
 default = []

bin/relay/Cargo.toml

@@ -11,6 +11,8 @@ use jsonrpsee::server::Server;
 use odyssey_wallet::{AlloyUpstream, OdysseyWallet, OdysseyWalletApiServer};
 use reth_tracing::Tracer;
 use std::net::{IpAddr, Ipv4Addr};
+use tower::ServiceBuilder;
+use tower_http::cors::CorsLayer;
 use tracing::info;
 use url::Url;
 
@@ -52,7 +54,11 @@ impl Args {
         let rpc = OdysseyWallet::new(AlloyUpstream::new(provider), chain_id).into_rpc();
 
         // start server
-        let server = Server::builder().http_only().build((self.address, self.port)).await?;
+        let server = Server::builder()
+            .http_only()
+            .set_http_middleware(ServiceBuilder::new().layer(CorsLayer::permissive()))
+            .build((self.address, self.port))
+            .await?;
         info!(addr = ?server.local_addr().unwrap(), "Started relay service");
 
         let handle = server.start(rpc);