Initialize RPC client to connect with a remote Nitro node

cmd/serve.go

@@ -69,6 +69,8 @@ func serve() {
 	logWithCommand.Infof("ipld-eth-server version: %s", v.VersionWithMeta)
 
 	wg := new(sync.WaitGroup)
+	defer wg.Wait()
+
 	serverConfig, err := s.NewConfig()
 	if err != nil {
 		logWithCommand.Fatal(err)
@@ -90,6 +92,14 @@ func serve() {
 
 	server.Serve(wg)
 
+	// TODO: Read from config file
+	runNitroInProcess := false
+	nitroEndpoint := "127.0.0.1:4005/api/v1"
+	var voucherValidator paymentsmanager.VoucherValidator
+
+	if runNitroInProcess {
+		log.Info("Running an in-process Nitro node")
+
 		nitroNode, err := initializeNitroNode(serverConfig.Nitro)
 		if err != nil {
 			logWithCommand.Fatal(err)
@@ -99,18 +109,8 @@ func serve() {
 		if err != nil {
 			logWithCommand.Fatal(err)
 		}
-
 		pm.Start(wg)
-
+		defer pm.Stop()
-	voucherValidator := paymentsmanager.InProcessVoucherValidator{PaymentsManager: pm}
-
-	// TODO: Read from config file
-	queryRates := map[string]*big.Int{
-		"eth_getBlockByNumber": big.NewInt(50),
-		"eth_getBlockByHash":   big.NewInt(50),
-		"eth_getStorageAt":     big.NewInt(50),
-		"eth_getLogs":          big.NewInt(50),
-	}
 
 		// TODO: Read from config file
 		rpcPort := 4005
@@ -119,13 +119,40 @@ func serve() {
 
 		cert, err := tls.LoadX509KeyPair(tlsCertFilepath, tlsKeyFilepath)
 		if err != nil {
-		panic(err)
+			logWithCommand.Fatal(err)
 		}
 
 		nitroRpcServer, err := initializeNitroRpcServer(nitroNode, pm, &cert, rpcPort)
 		if err != nil {
 			logWithCommand.Fatal(err)
 		}
+		defer nitroRpcServer.Close()
+
+		voucherValidator = paymentsmanager.InProcessVoucherValidator{PaymentsManager: pm}
+	} else {
+		log.Info("Connecting to a remote Nitro node")
+
+		clientConnection, err := nitroHttpTransport.NewHttpTransportAsClient(nitroEndpoint, 10*time.Millisecond)
+		if err != nil {
+			logWithCommand.Fatal(err)
+		}
+
+		nitroRpcClient, err := nitroRpc.NewRpcClient(clientConnection)
+		if err != nil {
+			logWithCommand.Fatal(err)
+		}
+		defer nitroRpcClient.Close()
+
+		voucherValidator = nitroRpc.RemoteVoucherValidator{Client: nitroRpcClient}
+	}
+
+	// TODO: Read from config file
+	queryRates := map[string]*big.Int{
+		"eth_getBlockByNumber": big.NewInt(50),
+		"eth_getBlockByHash":   big.NewInt(50),
+		"eth_getStorageAt":     big.NewInt(50),
+		"eth_getLogs":          big.NewInt(50),
+	}
 
 	if err := startServers(server, serverConfig, voucherValidator, queryRates); err != nil {
 		logWithCommand.Fatal(err)
@@ -154,10 +181,6 @@ func serve() {
 		graphQL.Stop()
 	}
 	server.Stop()
-	pm.Stop()
-	nitroRpcServer.Close()
-
-	wg.Wait()
 }
 
 // TODO: Absorb voucherValidator and queryRates args into existing ones

go.mod

@@ -302,4 +302,4 @@ replace (
 	github.com/cerc-io/ipfs-ethdb/v5 => github.com/cerc-io/ipfs-ethdb/v5 v5.0.1-alpha.0.20231013070931-0b1a36562a28
 )
 
-replace github.com/statechannels/go-nitro v0.1.1 => github.com/deep-stack/go-nitro v0.0.0-20231016053556-1aa955e958a8
+replace github.com/statechannels/go-nitro v0.1.1 => github.com/deep-stack/go-nitro v0.0.0-20231016095715-e033149edb71

go.sum

@@ -184,8 +184,8 @@ github.com/decred/dcrd/crypto/blake256 v1.0.1 h1:7PltbUIQB7u/FfZ39+DGa/ShuMyJ5il
 github.com/decred/dcrd/crypto/blake256 v1.0.1/go.mod h1:2OfgNZ5wDpcsFmHmCK5gZTPcCXqlm2ArzUIkw9czNJo=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 h1:8UrgZ3GkP4i/CLijOJx79Yu+etlyjdBU4sfcs2WYQMs=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
-github.com/deep-stack/go-nitro v0.0.0-20231016053556-1aa955e958a8 h1:vQgSbAAEtf+34DKfvCeOPQKhcigcTaRCSfaVD/sn/JA=
+github.com/deep-stack/go-nitro v0.0.0-20231016095715-e033149edb71 h1:/AG4iXW0TO8iIRvGrdhOoh42zODMzJ/Zao/jXuJskS0=
-github.com/deep-stack/go-nitro v0.0.0-20231016053556-1aa955e958a8/go.mod h1:gkKL37JcSo54ybLTI6VJRmP75bWEu9i1kc9RYmQLp+I=
+github.com/deep-stack/go-nitro v0.0.0-20231016095715-e033149edb71/go.mod h1:YYQvj9es00ZfLTwxZLM1M0ihUrqz8+lU2c10G06My3A=
 github.com/deepmap/oapi-codegen v1.6.0/go.mod h1:ryDa9AgbELGeB+YEXE1dR53yAjHwFvE9iAUlWl9Al3M=
 github.com/deepmap/oapi-codegen v1.8.2 h1:SegyeYGcdi0jLLrpbCMoJxnUUn8GBXHsvr4rbzjuhfU=
 github.com/deepmap/oapi-codegen v1.8.2/go.mod h1:YLgSKSDv/bZQB7N4ws6luhozi3cEdRktEqrX88CvjIw=