nip05 queryName() function.

nip05/nip05.go

@@ -0,0 +1,32 @@
+package nip05
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+func queryName(fullname string) string {
+	spl := strings.Split(fullname, "@")
+	if len(spl) != 2 {
+		return ""
+	}
+
+	name := spl[0]
+	domain := spl[1]
+	res, err := http.Get(fmt.Sprintf("https://%s/.well-known/nostr.json?name=%s", domain, name))
+	if err != nil {
+		return ""
+	}
+
+	var result struct {
+		Names map[string]string `json:"names"`
+	}
+	if err := json.NewDecoder(res.Body).Decode(&result); err != nil {
+		return ""
+	}
+
+	pubkey, _ := result.Names[name]
+	return pubkey
+}