gno.land/p/onbloc/uint256/v0⧉

1package uint25623func checkNumberS(input string) error {4	const fn = "UnmarshalText"5	l := len(input)6	if l == 0 {7		return errEmptyString(fn, input)8	}9	if l < 2 || input[0] != '0' ||10		(input[1] != 'x' && input[1] != 'X') {11		return errMissingPrefix(fn, input)12	}13	if l == 2 {14		return errEmptyNumber(fn, input)15	}16	if len(input) > 3 && input[2] == '0' {17		return errLeadingZero(fn, input)18	}19	return nil20}21