Checks are created with the @wallet command. However, what I want will be a gift code in the gift coupon. When we activate this code with @wallet, tons of coins will come to the wallet, just like with checks. In other words, a code entry field can be added to the @wallet checks section. So I can share the gift codes I want with my friends. Otherwise, if I add checks to the channel, users I don't know can receive the checks.