Adam seems to be making sense to me. Only querying a single node when an address in my wallet matches the block filter seems to be pretty efficient. The downside is it relies entirely on Tor for privacy, but then again it's not the only aspect of spv clients that require it for privacy (there's broadcasting for example).

And on a related note, if we eventually do end up receiving bip70 payments directly, we still need to query for block inclusion and that would seem to be an easy way to do it.

On 02/20/2015 12:53 PM, Mike Hearn wrote:

This is talking about a committed bloom filter. Not a committed UTXO set.

I read the following comment to mean it requires the UTXO commitments. Otherwise I'm not sure how you prove absence of withholding with just current block structures+an extra filter included in the block:

but with the bloom commitment (and UTXO trie organised commitment) he
can verify that the positive hits are correct via the merkle path, and
that the false positives are not being wrongly withheld by obtaining
merkle path proof that they are not in the trie
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