Ditch whitelist in favor of opt-in

[gruvin]

Opportunity

Maintaining a whitelist amidst an unpredictable sea of DEXs and DEX aggregators seems untenable. It certainly isn't "decentralized" and also ties the contract creator to a responsibility they could do without in their lives.

Solution

Instead, why not allow or indeed require wallets to opt-in to NFT mint/burning aspect of 404's? This could be done prior to any engagement with the 404 contract or after-the-fact, minting as many NFTs as their current balance permits.

If opting in is a one-way process — not able to be reversed — then all other functionality and tokenomics are retained for all users.

Efficiency

There is a gas cost in having the contract maintain this list of opt-ins, which will in most cases be considerably larger in size than the existing whitelist scheme. (You could have both, I suppose, with opt-ins overriding the whitelist for security/trust reasons.) The extra SSTOR cost might be optimized by packing groups of 256 accounts into single bit binary boolean's — 256 opt-ins stored in a single storage slot — based on your now deterministic NFT token IDs — though that implies that a holder must have at least NFT to be opted in. Just a thought.

Conclusion

You're welcome. :p

gruv0r