feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/missinggo/v2/encoding.go

@@ -0,0 +1,15 @@
+package missinggo
+
+// An interface for "encoding/base64".Encoder
+type Encoding interface {
+	EncodeToString([]byte) string
+	DecodeString(string) ([]byte, error)
+}
+
+// An encoding that does nothing.
+type IdentityEncoding struct{}
+
+var _ Encoding = IdentityEncoding{}
+
+func (IdentityEncoding) EncodeToString(b []byte) string        { return string(b) }
+func (IdentityEncoding) DecodeString(s string) ([]byte, error) { return []byte(s), nil }