Re: [bitcoin-dev] Optimized Header Sync

2018-04-03 Thread Jim Posen via bitcoin-dev
Thank you for your feedback AJ and Riccardo. Nice observation about using nBits from every 2016th block as a short specifier of chain work. You can get some savings from the 4 byte nBits encoding over VLQ for total chain work as in my spec. I tried it out on the current chain. At block height 516

Re: [bitcoin-dev] Low-bandwidth transaction relay

2018-04-03 Thread Jim Posen via bitcoin-dev
Hey. This idea sounds quite interesting. It'd be helpful to see some more numbers to evaluate it. - How much bandwidth is consumed by redundant tx INVs currently? What is this as a % of overall bandwidth usage? - How would filtering txs through N=2 links affect network propagation? This probably r

Re: [bitcoin-dev] Low-bandwidth transaction relay

2018-04-03 Thread Gregory Maxwell via bitcoin-dev
On Mon, Apr 2, 2018 at 10:18 PM, Gleb Naumenko via bitcoin-dev wrote: > Hi all, > I have a couple of ideas regarding transaction relay protocol and wanted to > share it with and probably get some feedback. https://bitcointalk.org/index.php?topic=1377345.0 https://people.xiph.org/~greg/mempool_sy

Re: [bitcoin-dev] Low-bandwidth transaction relay

2018-04-03 Thread Gleb Naumenko via bitcoin-dev
Yeah, sure. > How much bandwidth is consumed by redundant tx INVs currently? Currently, for an average public-IP node all INVs consume 0.05 Mbps or 540 megabytes per day. This number is based on current ratio public-IP nodes:private-IP nodes and transaction rate. This number is a sum of both in

Re: [bitcoin-dev] proposal: extend WIF format for segwit

2018-04-03 Thread Karl Johan Alm via bitcoin-dev
I took the liberty of turning this into a BIP proposal -- the formatted version can be seen here: https://github.com/kallewoof/bips/blob/bip-typed-wif/bip-extended-privkey.mediawiki BIP: XXX Layer: Applications Title: Typed Private Keys Author: Karl-Johan Alm Comments-Summary: No comme