On Thu, May 17, 2018 at 11:25:12AM -0400, Matt Corallo via bitcoin-dev wrote: > 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.
So I think we have two cases where wallets want to find txs spending from their outputs: 1) Waiting for a confirmation 2) Detecting theft The former can be turned off once there are no expected unconfirmed transactions. As for the latter, this is probably a valuable thing for wallets to do. Modulo reorgs, reducing the frequency that you check for stolen funds doesn't decrease total bandwidth cost - it's one filter match per block regardless - but perhaps the real-world bandwidth cost can be reduced by, say, waiting for a wifi connection rather than using cellular data. -- https://petertodd.org 'peter'[:-1]@petertodd.org
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