User Experience of using Zcash wallet

Zcash doesn't have browser wallet (and it don't actually need)

it makes the bridging process rough, I don't want users spending time inputing the bridge address manually.

• Found that Zcash actually has ZIP-321 to compose the Payment info into a QRCode, solved the inputting thing.

but, how to track the transaction? I don't want users spending time inputing the transaction id manually.

• Introduce a nonce which attached to the memo, that we can track it in our service for making things right.

Double Spend Prevention on Solana

I was about to maintain sort of state in Solana program to handle this, the cons are like below:

• lack of scalability using nonce (can not async bridging)
• take much more space and tx fees using merkle tree (I'm strict about this)
• zero knowledge too heavy and can not solve the problem totally

This drives me to pivot from a MPC protocol to a MPC based PoS blockchain, and maintains an accumulated merkle root in the global state

UTXO on Zcash

Ledger thing but really nightmare for scalability, our design currently just supports lock and burn, but not LP provider, the 75 seconds block time makes the deposited fund stuck in the mempool for too much time, and in the meanwhile we can not do anything, and the exist API is limited that indexing spendable notes efficiently is painful.

We can not solve this in a week, need more time to develop our own infura and supports LP