nip13: crazier and more fun and hopefully slightly more performant nonce encoding.

nip13/helpers.go

@@ -0,0 +1,25 @@
+package nip13
+
+const (
+	maxSafeAscii       = 126
+	minSafeAscii       = 35
+	availableSafeAscii = maxSafeAscii - minSafeAscii
+)
+
+func uintToStringCrazy(num uint64) string {
+	nchars := 1 + num/availableSafeAscii
+	chars := make([]byte, nchars)
+
+	i := 0
+	for {
+		if num < availableSafeAscii {
+			chars[i] = byte(num + minSafeAscii)
+			break
+		} else {
+			chars[i] = byte(num/availableSafeAscii + minSafeAscii)
+			num -= availableSafeAscii
+			i++
+		}
+	}
+	return string(chars)
+}