Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

On Thu, May 17, 2018 at 2:44 PM Jim Posen via bitcoin-dev Monitoring inputs by scriptPubkey vs input-txid also has a massive >> advantage for parallel filtering: You can usually known your pubkeys >> well in advance, but if you have to change what you're watching block >> N+1 for based on the tx

Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

Riccardo wrote: > The BIP recall some go code for how the parameter has been selected which > I can hardly understand and run The code you're linking to is for generating test vectors (to allow implementations to check the correctness of their gcs filters. The name of the file is 'gentestvectors.g

Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

On Fri, May 18, 2018, 19:57 Olaoluwa Osuntokun via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote: > Greg wrote: > > What about also making input prevouts filter based on the scriptpubkey > being > > _spent_? Layering wise in the processing it's a bit ugly, but if you > > validated th

Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

Greg wrote: > What about also making input prevouts filter based on the scriptpubkey being > _spent_? Layering wise in the processing it's a bit ugly, but if you > validated the block you have the data needed. AFAICT, this would mean that in order for a new node to catch up the filter index (inde

Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

Matt wrote: > 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 Depending on the use-case, the txid is more precise than searching for the output script as it doesn't need to de

Re: [bitcoin-dev] UHS: Full-node security without maintaining a full UTXO set

You should read this: https://bitcointalk.org/index.php?topic=153662.10 On Wed, May 16, 2018 at 7:36 PM, Cory Fields via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote: > Tl;dr: Rather than storing all unspent outputs, store their hashes. > Untrusted > peers can supply the full output

Re: [bitcoin-dev] BIP 158 Flexibility and Filter Size

Another parameter which heavily affects filter size is the false positive rate which is empirically set to 2^-20 The BIP recall some go code