Release v2.2.0

vendor/github.com/fiatjaf/go-lnurl/codec.go

@@ -0,0 +1,39 @@
+package lnurl
+
+import (
+	"errors"
+	"strings"
+)
+
+// LNURLDecode takes a bech32-encoded lnurl string and returns a plain-text https URL.
+func LNURLDecode(lnurl string) (url string, err error) {
+	tag, data, err := Decode(lnurl)
+	if err != nil {
+		return
+	}
+
+	if tag != "lnurl" {
+		err = errors.New("tag is not 'lnurl', but '" + tag + "'")
+		return
+	}
+
+	converted, err := ConvertBits(data, 5, 8, false)
+	if err != nil {
+		return
+	}
+
+	url = string(converted)
+	return
+}
+
+// LNURLEncode takes a plain-text https URL and returns a bech32-encoded uppercased lnurl string.
+func LNURLEncode(actualurl string) (lnurl string, err error) {
+	asbytes := []byte(actualurl)
+	converted, err := ConvertBits(asbytes, 8, 5, true)
+	if err != nil {
+		return
+	}
+
+	lnurl, err = Encode("lnurl", converted)
+	return strings.ToUpper(lnurl), err
+}