reserved.gno

  1package nslogic
  2
  3import (
  4	"strconv"
  5
  6	"gno.land/r/nym-mnsrehearsal001/nsdata/v2"
  7)
  8
  9// GENERATED BY tools/gen-reserved.py FROM collections/reserved-labels.json.
 10// Do not edit by hand: the site reads the same source, and a change made
 11// in one place only is a label the site offers and the chain refuses.
 12//
 13// STRUCTURAL RULES ONLY. The wordlists live off chain, in that JSON,
 14// because storage is 100 ugnot per byte and a ten-thousand-word
 15// dictionary is about 57 GNOT paid forever to encode a marketing
 16// decision that will change. This is the backstop against a bug in the
 17// issuer, not the place the policy lives.
 18//
 19// THE NUMBERS ARE SETTABLE, the shape is not. A minimum length is a
 20// promotion knob and belongs in the panel — redeploying this realm to
 21// change a 5 to a 4 costs about 22 GNOT. So the lengths read from the
 22// vault's globals and fall back to the values generated here; the
 23// pattern rules are structural facts about what a handle looks like and
 24// stay in code.
 25
 26const (
 27	defaultFreeMinLength = 5
 28	defaultFreeMaxLength = 63
 29
 30	keyFreeMin = "freemin"
 31	keyFreeMax = "freemax"
 32)
 33
 34// FreeMinLength is the shortest label the free tier will issue. Settable
 35// from the panel, because which lengths are worth money is a commercial
 36// judgement that moves.
 37func FreeMinLength() int {
 38	if v := nsdata.GetGlobal(keyFreeMin); v != "" {
 39		if n, err := strconv.Atoi(v); err == nil && n > 0 && n <= 63 {
 40			return n
 41		}
 42	}
 43	return defaultFreeMinLength
 44}
 45
 46func FreeMaxLength() int {
 47	if v := nsdata.GetGlobal(keyFreeMax); v != "" {
 48		if n, err := strconv.Atoi(v); err == nil && n > 0 && n <= 63 {
 49			return n
 50		}
 51	}
 52	return defaultFreeMaxLength
 53}
 54
 55/*
 56FreeLabelAllowed reports whether a label may be ISSUED on the free tier.
 57
 58ISSUED, and never renewed. This is called by GrantFreeName and by
 59nothing else, deliberately: if the minimum length rises from three to
 60five, somebody who already holds a three-character free name keeps it
 61and keeps renewing it free. Tightening a rule must not reach backwards
 62and take away what was already given — that is the single fastest way to
 63make a giveaway cost more trust than it ever bought.
 64
 65A name that LAPSES and is registered again is a new issuance, and gets
 66whatever the rules say that day. That is not retroactive; it is a
 67different name event.
 68*/
 69func FreeLabelAllowed(label string) bool {
 70	n := len(label)
 71	if n < FreeMinLength() || n > FreeMaxLength() {
 72		return false
 73	}
 74	// Pure digits: 1337, 420, years. Collectible, and no handle is one.
 75	digits := true
 76	for i := 0; i < n; i++ {
 77		if label[i] < '0' || label[i] > '9' {
 78			digits = false
 79			break
 80		}
 81	}
 82	if digits {
 83		return false
 84	}
 85	// aaaa — every character the same.
 86	same := true
 87	for i := 1; i < n; i++ {
 88		if label[i] != label[0] {
 89			same = false
 90			break
 91		}
 92	}
 93	if same {
 94		return false
 95	}
 96	// abab — a two-character cycle. Also collectible, also not a handle.
 97	if n >= 4 {
 98		cycle := true
 99		for i := 2; i < n; i++ {
100			if label[i] != label[i-2] {
101				cycle = false
102				break
103			}
104		}
105		if cycle {
106			return false
107		}
108	}
109	return true
110}