util.gno

 1package grc721v2
 2
 3const (
 4	MaxNameLen   = 64
 5	MaxSymbolLen = 11
 6)
 7
 8var zeroAddress = address("")
 9
10func isValidAddress(addr address) error {
11	if !addr.IsValid() {
12		return ErrInvalidAddress
13	}
14	return nil
15}
16
17func validName(name string) bool {
18	if name == "" || len(name) > MaxNameLen {
19		return false
20	}
21	for _, c := range name {
22		if c < 0x20 || c == 0x7f {
23			return false
24		}
25	}
26	return true
27}
28
29func validSymbol(symbol string) bool {
30	if symbol == "" || len(symbol) > MaxSymbolLen {
31		return false
32	}
33	for _, c := range symbol {
34		if !isAlnum(c) && c != '_' && c != '-' {
35			return false
36		}
37	}
38	return true
39}
40
41func isAlnum(c rune) bool {
42	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')
43}