refactor: make HashCode a generic utility

multihash/multihash.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"git.lumeweb.com/LumeWeb/libs5-go/internal/bases"
 	"git.lumeweb.com/LumeWeb/libs5-go/types"
+	"git.lumeweb.com/LumeWeb/libs5-go/utils"
 	"github.com/multiformats/go-multibase"
 	"unicode/utf8"
 )
@@ -67,6 +68,7 @@ func (m *Multihash) Equals(other *Multihash) bool {
 }
 
 func (m *Multihash) HashCode() MultihashCode {
+	return utils.HashCode(m.FullBytes[:4])
 	return int(m.FullBytes[0]) +
 		int(m.FullBytes[1])<<8 +
 		int(m.FullBytes[2])<<16 +

nodeid/nodeid.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"errors"
 	"git.lumeweb.com/LumeWeb/libs5-go/internal/bases"
+	"git.lumeweb.com/LumeWeb/libs5-go/utils"
 	"github.com/multiformats/go-multibase"
 )
 
@@ -40,13 +41,7 @@ func (nodeId *NodeId) Equals(other interface{}) bool {
 }
 
 func (nodeId *NodeId) HashCode() int {
-	if len(nodeId.Bytes) < 4 {
+	return utils.HashCode(nodeId.Bytes[:4])
-		return 0
-	}
-	return int(nodeId.Bytes[0]) +
-		int(nodeId.Bytes[1])<<8 +
-		int(nodeId.Bytes[2])<<16 +
-		int(nodeId.Bytes[3])<<24
 }
 
 func (nodeId *NodeId) ToBase58() (string, error) {

utils/bytes.go

@@ -5,3 +5,14 @@ import "bytes"
 func ConcatBytes(slices ...[]byte) []byte {
 	return bytes.Join(slices, nil)
 }
+
+func HashCode(bytes []byte) int {
+	if len(bytes) < 4 {
+		return 0
+	}
+
+	return int(bytes[0]) |
+		int(bytes[1])<<8 |
+		int(bytes[2])<<16 |
+		int(bytes[3])<<24
+}