From aba098d8e851ed4883c418f6b8c7cf8a22ed760f Mon Sep 17 00:00:00 2001
From: Redouane Lakrache <r3d0ne@gmail.com>
Date: Sat, 27 Apr 2024 01:51:27 +0200
Subject: [PATCH] [RelayMiner] Support https backend urls (#507)

---
 pkg/relayer/config/proxy_http_config_parser.go |  6 +++---
 pkg/relayer/config/supplier_hydrator.go        |  4 ++--
 pkg/relayer/proxy/synchronous.go               | 16 +++++++++++++++-
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/pkg/relayer/config/proxy_http_config_parser.go b/pkg/relayer/config/proxy_http_config_parser.go
index ad704d306..1ce7695c5 100644
--- a/pkg/relayer/config/proxy_http_config_parser.go
+++ b/pkg/relayer/config/proxy_http_config_parser.go
@@ -26,11 +26,11 @@ func (serverConfig *RelayMinerServerConfig) parseHTTPServerConfig(
 	return nil
 }
 
-// parseHTTPSupplierConfig populates the supplier fields of the target structure
-// that are relevant to "http" specific service configurations.
+// parseSupplierBackendUrl populates the supplier fields of the target structure
+// that are relevant to "http" and "https" backend url service configurations.
 // This function alters the target RelayMinerSupplierServiceConfig structure
 // as a side effect.
-func (supplierServiceConfig *RelayMinerSupplierServiceConfig) parseHTTPSupplierConfig(
+func (supplierServiceConfig *RelayMinerSupplierServiceConfig) parseSupplierBackendUrl(
 	yamlSupplierServiceConfig YAMLRelayMinerSupplierServiceConfig,
 ) error {
 	// Check if the supplier backend url is empty
diff --git a/pkg/relayer/config/supplier_hydrator.go b/pkg/relayer/config/supplier_hydrator.go
index 1fbb8e979..2284b24ce 100644
--- a/pkg/relayer/config/supplier_hydrator.go
+++ b/pkg/relayer/config/supplier_hydrator.go
@@ -68,10 +68,10 @@ func (supplierConfig *RelayMinerSupplierConfig) HydrateSupplier(
 	// by their own functions.
 	supplierConfig.ServiceConfig = &RelayMinerSupplierServiceConfig{}
 	switch backendUrl.Scheme {
-	case "http":
+	case "http", "https":
 		supplierConfig.ServerType = RelayMinerServerTypeHTTP
 		if err := supplierConfig.ServiceConfig.
-			parseHTTPSupplierConfig(yamlSupplierConfig.ServiceConfig); err != nil {
+			parseSupplierBackendUrl(yamlSupplierConfig.ServiceConfig); err != nil {
 			return err
 		}
 	default:
diff --git a/pkg/relayer/proxy/synchronous.go b/pkg/relayer/proxy/synchronous.go
index 75d76679b..0156f50ca 100644
--- a/pkg/relayer/proxy/synchronous.go
+++ b/pkg/relayer/proxy/synchronous.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"compress/gzip"
 	"context"
+	"crypto/tls"
 	"fmt"
 	"io"
 	"net/http"
@@ -277,8 +278,21 @@ func (sync *synchronousRPCServer) serveHTTP(
 		relayHTTPRequest.Header.Add(key, value)
 	}
 
+	// Configure the HTTP client to use the appropriate transport based on the
+	// backend URL scheme.
+	var client *http.Client
+	switch serviceConfig.BackendUrl.Scheme {
+	case "https":
+		transport := &http.Transport{
+			TLSClientConfig: &tls.Config{},
+		}
+		client = &http.Client{Transport: transport}
+	default:
+		client = http.DefaultClient
+	}
+
 	// Send the relay request to the native service.
-	httpResponse, err := http.DefaultClient.Do(relayHTTPRequest)
+	httpResponse, err := client.Do(relayHTTPRequest)
 	if err != nil {
 		return nil, err
 	}