Add Orchard to Zecwallet Mobile and Desktop Apps

Community Grants Applications
53

The spam filter threshold is configurable in the Zecwallet SDK. The mobile apps currently set a threshold of sapling_outputs + actions < 50. LightwalletD then filters out all the transactions that are over this threshold when sending the blocks to Zecwallet Lite.

The cmu portion of the outputs is retained to allow the clients to maintain the witnesses. So the spam filter:

  • Saves on download bandwidth
  • Prevents trial decryption of spammy transactions

But does not help with:

  • Clients still have to update the witnesses from spammy transactions.

The LightwalletD implementation is here: FilterSpamBlock · adityapk00/lightwalletd@a67fcec · GitHub

Edit: I believe that the actual spam filter should be aligned with the ZIP that @aiyadt is working on. i.e., Filter out transactions that create more than spam_threshold outputs that didn’t pay the adequate fee.

7 Likes