feat: Waku v2 bridge

Issue #12610

vendor/github.com/status-im/status-go/protocol/v1/decoder.go

@@ -0,0 +1,57 @@
+package protocol
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/russolsen/transit"
+)
+
+// NewMessageDecoder returns a new Transit decoder
+// that can deserialize Message structs.
+// More about Transit: https://github.com/cognitect/transit-format
+func NewMessageDecoder(r io.Reader) *transit.Decoder {
+	decoder := transit.NewDecoder(r)
+	decoder.AddHandler(pairMessageTag, pairMessageHandler)
+	return decoder
+}
+
+const (
+	pairMessageTag = "p2"
+)
+
+func pairMessageHandler(d transit.Decoder, value interface{}) (interface{}, error) {
+	taggedValue, ok := value.(transit.TaggedValue)
+	if !ok {
+		return nil, errors.New("not a tagged value")
+	}
+	values, ok := taggedValue.Value.([]interface{})
+	if !ok {
+		return nil, errors.New("tagged value does not contain values")
+	}
+
+	pm := PairMessage{}
+	for idx, v := range values {
+		var ok bool
+
+		switch idx {
+		case 0:
+			pm.InstallationID, ok = v.(string)
+		case 1:
+			pm.DeviceType, ok = v.(string)
+		case 2:
+			pm.Name, ok = v.(string)
+		case 3:
+			pm.FCMToken, ok = v.(string)
+		default:
+			// skip any other values
+			ok = true
+		}
+
+		if !ok {
+			return nil, fmt.Errorf("invalid value for index: %d", idx)
+		}
+	}
+	return pm, nil
+}