--- Log opened Fri Dec 24 00:00:10 2021
00:35 -!- Talkless [~Talkless@mail.dargis.net] has joined #bitcoin-core-pr-reviews
00:38 -!- Yihen_ [~textual@103.138.75.117] has quit [Remote host closed the connection]
00:38 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
02:17 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has joined #bitcoin-core-pr-reviews
02:30 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
02:30 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
03:46 -!- Talkless [~Talkless@mail.dargis.net] has quit [Quit: Konversation terminated!]
03:55 -!- Talkless [~Talkless@mail.dargis.net] has joined #bitcoin-core-pr-reviews
04:04 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has quit [Quit: https://quassel-irc.org - Chat comfortably. Anywhere.]
04:06 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has joined #bitcoin-core-pr-reviews
04:06 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has quit [Client Quit]
04:08 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has joined #bitcoin-core-pr-reviews
04:24 -!- Talkless [~Talkless@mail.dargis.net] has quit [Quit: Konversation terminated!]
05:25 -!- tecnecio [~tecnecio_@174.red-2-139-120.dynamicip.rima-tde.net] has joined #bitcoin-core-pr-reviews
07:21 -!- provoostenator [~quassel@user/provoostenator] has quit [Quit: https://quassel-irc.org - Chat comfortably. Anywhere.]
07:23 -!- Talkless [~Talkless@m83-176-229-235.cust.tele2.lt] has joined #bitcoin-core-pr-reviews
07:24 -!- provoostenator [~quassel@user/provoostenator] has joined #bitcoin-core-pr-reviews
08:04 -!- andrewtoth [~andrewtot@gateway/tor-sasl/andrewtoth] has quit [Remote host closed the connection]
08:05 -!- andrewtoth [~andrewtot@gateway/tor-sasl/andrewtoth] has joined #bitcoin-core-pr-reviews
08:42 -!- luke-jr [~luke-jr@user/luke-jr] has quit [Ping timeout: 268 seconds]
08:43 -!- luke-jr [~luke-jr@user/luke-jr] has joined #bitcoin-core-pr-reviews
08:52 -!- madacol [~madacol@185.231.211.202] has joined #bitcoin-core-pr-reviews
08:59 -!- madacol [~madacol@185.231.211.202] has quit [Ping timeout: 256 seconds]
09:02 -!- dongcarl [~dongcarl@70.107.207.192] has quit [Quit: Ping timeout (120 seconds)]
09:04 -!- qubenix [~qubenix@66.172.11.228] has quit [Remote host closed the connection]
09:05 -!- dongcarl [~dongcarl@70.107.207.192] has joined #bitcoin-core-pr-reviews
09:06 -!- madacol [~madacol@185.231.211.202] has joined #bitcoin-core-pr-reviews
09:08 -!- qubenix [~qubenix@user/qubenix] has joined #bitcoin-core-pr-reviews
10:05 -!- madacol [~madacol@185.231.211.202] has quit [Quit: WeeChat 2.8]
10:16 < pinheadmz> im brute forcing vanity bech32 address for an idea I had, and encounter something unexpected. 
10:16 < pinheadmz> bc1qh300vzk0afa6ec7p9h765uzps52merl03yvayfe6uppglw7vwp2qul45jg bcrt1qh300vzk0afa6ec7p9h765uzps52merl03yvayfe6uppglw7vwp2qxwfaaa
10:16 < pinheadmz> bc1qs7qtzd33xmufprycuczjz2p60ey7pqwp47w7aukp0dahf3uscr8qp8uaaa bcrt1qs7qtzd33xmufprycuczjz2p60ey7pqwp47w7aukp0dahf3uscr8qmkq5jg
10:16 < pinheadmz> i dont know how to explain it but, these are pairs of addrs with same program for main / regtest
10:16 < pinheadmz> the checksums are... connected somehow
10:16 < pinheadmz> when main chsksum ends in aaa, regtest checkum ends in 5jg
10:16 < pinheadmz> -> and VICE VERSA
10:16 < pinheadmz> what?!
10:17 < sipa> A different prefix corresponds to XOR'ing a different constant into the checksum.
10:17 < pinheadmz> its just xor?
10:17 < sipa> XOR is an involution (doing it twice undoes the effect).
10:17 < pinheadmz> i understand that but didnt see it that way inthe spec
10:17 < pinheadmz>   values = bech32_hrp_expand(hrp) + data
10:18 < sipa> It's a linear code; everything is XORing :)
10:18 < pinheadmz> interesting, thank you
10:18 < sipa> Every (character,position) combination translates to a particular constants. All those constants are XORed, giving the checksum.
10:19 < pinheadmz> ok i see now in bech32_polymod in bip173, theres a loop where everything gets xored
10:20 < pinheadmz> neat
10:20 < pinheadmz> got a chill down my spine i thought id just generated the same priv key twice somehow
10:20 < sipa> Right, though it may not be obvious that repeated application of the bech32_polymod transformation still results in xorring for earlier processed characters.
10:20 < sipa> However, it's a linear code, so it must be.
10:22 < pinheadmz> does that mean that the same bytes, in a different order would result in same checksum?
10:22 < sipa> No, because the position matters.
10:22 < pinheadmz> makes sense
10:22 < sipa> Every (character,position) combination results in a different constant being XOR'ed into the checksum.
10:23 < sipa> It is a length 1023 code though, by design, so (c,p) and (c,p+1023) have the same constants.
10:24 < pinheadmz> where is the position in the algorithm? theres this loop `  for v in values:` which doesnt pass the index (of v)
10:24 < sipa> (If you were to actually use the algorithm on such long inputs; BIP173/BIP350 restrict the input including HRP to 89 or 90 characters IIRC)
10:24 < sipa> It's not in the algorithm.
10:24 < sipa> I'm explaining what the effect of the algorithm is.
10:25 < sipa> Earlier characters go through more iterations of the polymod loop; that's how the position matters.
10:25 < pinheadmz> aha
12:10 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
12:11 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
12:30 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
12:30 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
13:03 -!- ___nick___ [~quassel@cpc68286-cdif17-2-0-cust533.5-1.cable.virginm.net] has quit [Ping timeout: 240 seconds]
13:20 -!- Talkless [~Talkless@m83-176-229-235.cust.tele2.lt] has quit [Ping timeout: 256 seconds]
16:03 -!- siv2r[m] [~siv2rmatr@2001:470:69fc:105::fed3] has quit [Ping timeout: 240 seconds]
16:04 -!- siv2r[m] [~siv2rmatr@2001:470:69fc:105::fed3] has joined #bitcoin-core-pr-reviews
16:32 -!- tecnecio [~tecnecio_@174.red-2-139-120.dynamicip.rima-tde.net] has quit [Ping timeout: 240 seconds]
19:30 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
19:30 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
20:30 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
20:30 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
22:02 -!- shaavan [~shaavan@117.199.216.54] has joined #bitcoin-core-pr-reviews
22:04 -!- shaavan [~shaavan@117.199.216.54] has quit [Client Quit]
23:06 -!- tecnecio [~tecnecio_@174.red-2-139-120.dynamicip.rima-tde.net] has joined #bitcoin-core-pr-reviews
23:18 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
23:19 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
23:29 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
23:30 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
23:58 -!- Yihen [~textual@103.138.75.117] has quit [Remote host closed the connection]
23:59 -!- Yihen [~textual@103.138.75.117] has joined #bitcoin-core-pr-reviews
--- Log closed Sat Dec 25 00:00:11 2021