compile-time check for json.Marshaler and json.Unmarshaler.

keys.go

@@ -3,6 +3,7 @@ package nostr
 import (
 	"crypto/rand"
 	"encoding/hex"
+	stdjson "encoding/json"
 	"fmt"
 	"io"
 	"strings"
@@ -65,6 +66,11 @@ var ZeroPK = PubKey{}
 
 type PubKey [32]byte
 
+var (
+	_ stdjson.Marshaler   = PubKey{}
+	_ stdjson.Unmarshaler = (*PubKey)(nil)
+)
+
 func (pk PubKey) String() string { return "pk::" + pk.Hex() }
 func (pk PubKey) Hex() string    { return hex.EncodeToString(pk[:]) }
 func (pk PubKey) MarshalJSON() ([]byte, error) {

types.go

@@ -2,6 +2,7 @@ package nostr
 
 import (
 	"encoding/hex"
+	stdjson "encoding/json"
 	"fmt"
 	"unsafe"
 )
@@ -17,6 +18,11 @@ var ZeroID = ID{}
 // ID represents an event id
 type ID [32]byte
 
+var (
+	_ stdjson.Marshaler   = ID{}
+	_ stdjson.Unmarshaler = (*ID)(nil)
+)
+
 func (id ID) String() string { return "id::" + id.Hex() }
 func (id ID) Hex() string    { return hex.EncodeToString(id[:]) }