## ASA airdrops and Open sale for Algos

Is opt-in via algosigner and to participate in the airdrop possible through algosigner?  
For example, to participate in the open sale, sign via algosigner, and to participate in the airdrop, sign via algosigner is possible.  
We want to airdrop to every unique Algorand address.

We have created an ASA, and we have the following requirements; request a suitable approach to achieve the functionality.  
**Sale of ASA for Algos:** User should be able to send x Algos to receive x ASA tokens as per the sale schedule.  
**Receive airdrop of x ASA tokens** as per a specific schedule for every unique address.