feat: add NodeId

nodeid/nodeid.go

@@ -0,0 +1,58 @@
+package nodeid
+
+import (
+	"bytes"
+	"errors"
+	"git.lumeweb.com/LumeWeb/libs5-go/internal/bases"
+	"github.com/multiformats/go-multibase"
+)
+
+var (
+	errorNotBase58BTC = errors.New("not a base58btc string")
+)
+
+type NodeId struct {
+	Bytes []byte
+}
+
+func New(bytes []byte) *NodeId {
+	return &NodeId{Bytes: bytes}
+}
+
+func Decode(nodeId string) (*NodeId, error) {
+	encoding, ret, err := multibase.Decode(nodeId)
+	if err != nil {
+		return nil, err
+	}
+
+	if encoding != multibase.Base58BTC {
+		return nil, errorNotBase58BTC
+	}
+
+	return New(ret), nil
+}
+
+func (nodeId *NodeId) Equals(other interface{}) bool {
+	if otherNodeId, ok := other.(*NodeId); ok {
+		return bytes.Equal(nodeId.Bytes, otherNodeId.Bytes)
+	}
+	return false
+}
+
+func (nodeId *NodeId) HashCode() int {
+	if len(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) {
+	return bases.ToBase58BTC(nodeId.Bytes)
+}
+
+func (nodeId *NodeId) ToString() (string, error) {
+	return nodeId.ToBase58()
+}