Improve attested RPC client

Author: ameba23

Cargo.lock

@@ -50,26 +50,42 @@ time = "0.3.44"
 once_cell = "1.21.3"
 axum = "0.8.6"
 tower-http = { version = "0.6.7", features = ["fs"] }
+
+# For websockets
 tokio-tungstenite = { version = "0.28.0", optional = true }
 futures-util = { version = "0.3.31", optional = true }
 
-alloy-rpc-client = "1.1.3"
-alloy-json-rpc = "1.1.3"
-alloy-transport = "1.1.3"
-tower-service = "0.3.3"
-alloy-transport-http = { version = "1.4.3", features = ["hyper"]}
-url = "2.5.8"
+# For JSON RPC
+alloy-rpc-client = { version = "1.1.3", optional = true }
+alloy-json-rpc = { version = "1.1.3", optional = true }
+alloy-transport = { version = "1.1.3", optional = true }
+tower-service = { version = "0.3.3", optional = true }
+alloy-transport-http = { version = "1.4.3", features = [
+  "hyper",
+], optional = true }
+url = { version = "2.5.8", optional = true }
 
 [dev-dependencies]
 rcgen = "0.14.5"
 tempfile = "3.23.0"
 tdx-quote = { version = "0.0.5", features = ["mock"] }
+jsonrpsee = { version = "0.26.0", features = ["server"] }
 
 [features]
-default = ["azure", "ws"]
+default = ["azure", "ws", "rpc"]
 
 # Adds support for Microsoft Azure attestation generation and verification
 azure = ["tss-esapi", "az-tdx-vtpm"]
 
 # Adds websocket support
 ws = ["tokio-tungstenite", "futures-util"]
+
+# Adds JSON RPC support
+rpc = [
+  "alloy-json-rpc",
+  "alloy-rpc-client",
+  "alloy-transport",
+  "tower-service",
+  "alloy-transport-http",
+  "url",
+]