BIP 158 currently includes the following in the "basic" filter: 1) txids, 2) output scripts, 3) input prevouts.
I believe (1) could be skipped entirely - there is almost no reason why you'd not be able to filter for, eg, the set of output scripts in a transaction you know about and (2) and (3) may want to be split out - many wallets may wish to just find transactions paying to them, as transactions spending from their outputs should generally be things they've created. In general, I'm concerned about the size of the filters making existing SPV clients less willing to adopt BIP 158 instead of the existing bloom filter garbage and would like to see a further exploration of ways to split out filters to make them less bandwidth intensive. Some further ideas we should probably play with before finalizing moving forward is providing filters for certain script templates, eg being able to only get outputs that are segwit version X or other similar ideas. Matt _______________________________________________ bitcoin-dev mailing list firstname.lastname@example.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev