Merge pull request #309 from forta-network/disable-http-2

Disable HTTP/2 in default client

utils/httpclient/client.go

@@ -1,11 +1,17 @@
 package httpclient
 
 import (
+	"crypto/tls"
 	"net/http"
 	"time"
 )
 
-// Default is the default HTTP client to use.
+// Default is the default HTTP client to use. HTTP/2 is disabled.
 var Default = &http.Client{
 	Timeout: time.Second * 30,
+	// Disable HTTP/2
+	// Reason: https://www.bentasker.co.uk/posts/blog/software-development/golang-net-http-net-http-2-does-not-reliably-close-failed-connections-allowing-attempted-reuse.html
+	Transport: &http.Transport{
+		TLSNextProto: map[string]func(string, *tls.Conn) http.RoundTripper{},
+	},
 }