so re: https://github.com/bitcoin/bitcoin/pull/7096 was this change in RPC settxfee behavior ever planned, or noticed before? I think it's strange that this is in 0.11, but no one reported the change from per-kB to absolute fee?
gmaxwell: can we have your input on these tests? https://github.com/bitcoin/bitcoin/issues/7086 Looks like one hidden place where openssl is still used, as an oversight, as openssl hasn't been part of consensus in that particular way for ages
The gettxoutproof RPC in bitcoin core also provides an eqivilent message over the RPC.
raskolnnikov: instead you can download a block and filter the download to particular transactions or addresses, see MSG_FILTERED_BLOCK in the bitcoin core source code
raskolnnikov: if someone were to give you a transaction, they could also give you the proof that it was in a block. So there is currently no facility in the protocol to just extract a proof for an arbritary transaction. (among other things this would require an index of all transactions, which bitcoin full nodes do not usually have)
SPV's wallets provide a txn hash to full nodes whenever they want to verify if the transaction exists on a previous block and is unspent. where in the SRC code does bitcoin-core process and replies to these kind of requests?
there is a definitely at least one bogus client out there claiming to be bitcoin-seeder
bitcoin seeder does a mempool request? surely not
actually no, most of those are "/bitcoin-seeder:0.01/" "/Snoopy:0.2.1/"
sipa: right now large parties using bitcoin core have to periodically rotate out wallets to keep things managable. Things are much better now because of varrious fat trimming. (Including the addtowallet fix we just merged from luke)
During the last malleability attacks I walked a bitcoin ATM operator through doing that. Hard part was explaining the need, once they got it the actual implementation was easy. (well also the wallet they were using to fill their ATMs ..... had no sendmany support. :( )
there's an option in bitcoin core's wallet to not spend any unconfirmed outputs
which reminds me...I need to ask cfields what would he think about a consensus building module separated from util, common, etc, maybe merging with libsecp256 and crypto modules (that is not good for bitcoin-tx when we start adding non-tx stuff to the module, but verifyheader and verifyblock should be relatively light compared to verifytx and verifyscript)
jgarzik: it seems that that is not really the case; you can come up with a formula to treat bitcoin-days-destroyed as extra fee, but it's probably hard to prevent it from making miners lose large amounts in fees
but I agree that you either want bitcoin core to choose a fee for you (estimate confirm within # confirmations) or you want to set a fee/kB, which should be above what your mempool accepts at all
wumpus, about the "all fees in bitcoin core are per kB" thing:
there's one difference though: tor only authenticates on opening the connection, bitcoin http authenticates for every request. So they can use more key stretching without creating command latency issues.