remove sonic from the default build, guard it under "sonic" tag for now.

envelopes_default.go

@@ -0,0 +1,54 @@
+//go:build !sonic
+
+package nostr
+
+import (
+	"bytes"
+	"errors"
+)
+
+func NewMessageParser() MessageParser {
+	return messageParser{}
+}
+
+type messageParser struct{}
+
+func (messageParser) ParseMessage(message []byte) (Envelope, error) {
+	firstComma := bytes.Index(message, []byte{','})
+	if firstComma == -1 {
+		return nil, errors.New("malformed json")
+	}
+	label := message[0:firstComma]
+
+	var v Envelope
+	switch {
+	case bytes.Contains(label, labelEvent):
+		v = &EventEnvelope{}
+	case bytes.Contains(label, labelReq):
+		v = &ReqEnvelope{}
+	case bytes.Contains(label, labelCount):
+		v = &CountEnvelope{}
+	case bytes.Contains(label, labelNotice):
+		x := NoticeEnvelope("")
+		v = &x
+	case bytes.Contains(label, labelEose):
+		x := EOSEEnvelope("")
+		v = &x
+	case bytes.Contains(label, labelOk):
+		v = &OKEnvelope{}
+	case bytes.Contains(label, labelAuth):
+		v = &AuthEnvelope{}
+	case bytes.Contains(label, labelClosed):
+		v = &ClosedEnvelope{}
+	case bytes.Contains(label, labelClose):
+		x := CloseEnvelope("")
+		v = &x
+	default:
+		return nil, UnknownLabel
+	}
+
+	if err := v.UnmarshalJSON(message); err != nil {
+		return nil, err
+	}
+	return v, nil
+}