libera #monero

13 Jun 2022

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• 11:25
  Guest6599
  hello
• 11:25
  Guest6599
  what variant type has v16 outputs
• 11:27
  Guest6599
  there is a line "from v15, require outputs have view tags"
• 11:27
  Guest6599
  and my output is not acceptable because of wrong variant type
• 11:27
  Guest6599
  variant type is 2
• 11:32
  moneromooo
  Variant as in... ringct signature version ?
• 11:32
  sech1
  Guest6599 type 3
• 11:33
  sech1
  github.com/monero-project/monero/bl…onote_basic/cryptonote_basic.h#L579
• 11:36
  Guest6599
  i insert type 3 but output was not acceptable
• 11:37
  moneromooo
  You're sure your network has forked by then ?
• 11:37
  Guest6599
  no is new network and v14 output was acceptable with variant v2 but v16 dont work with variant v2 or v3
• 11:48
  Guest6599
  moneromooo "Variant as in... ringct signature version "
• 11:48
  Guest6599
  what do u mean
• 11:48
  Guest6599
  i must insert right ringct version too?
• 11:53
  sech1
  You need to also add a view tag to each output of type 3
• 11:53
  sech1
  ringct has nothing to do with this
• 11:54
  Guest6599
  where i add this
• 11:54
  sech1
  in your code
• 11:54
  sech1
  presumably
• 11:54
  sech1
  you have some code, right?
• 11:54
  Guest6599
  yes
• 11:54
  sech1
  view tag is added right after the pub key in an output
• 11:55
  sech1
  see monero-project/monero #8061
• 11:56
  moneromooo
  Ignore what I said, I did not know what you were talking about at the time.
• 11:56
  sech1
  it's hard to help you without seeing the code, right now I'm just doing wild guesses of what you actually need
• 11:57
  moneromooo
  Also, "dont work" is no good. Give error messages if any, etc. Details.
• 11:57
  Guest6599
  in which file view tag is added
• 11:57
  Guest6599
  monero code is huge
• 11:57
  Guest6599
  blockchain,cryptonote_format_utils.cpp  etc
• 11:58
  sech1
  we're not going to do your homework for you
• 11:58
  moneromooo
  git show XXX, with XXX being the hash of the commit which added view tags.
• 11:58
  moneromooo
  git log to find it.
• 11:58
  Guest6599
  wow moneromooo
• 11:58
  Guest6599
  u are so straight to the point
• 12:07
  plowsof[m]
  ASMR moo and sech do your homework
• 12:08
  plowsof[m]
  while ooo123 reviews it
• 12:11
  merope
  Throw some lofi in the background and you've got yourself a hit
• 12:21
  plowsof[m]
  lol :D
• 13:12
  Guest6599
  github.com/monero-project/monero/bl…ic/cryptonote_format_utils.cpp#L228
• 13:12
  Guest6599
  this line is throwning error
• 13:12
  Guest6599
  with v14 everything is ok
• 13:20
  Guest6599
  i cant understant where view tag is added
• 13:52
  moneromooo
  Is your tx created by the monero software, or do you create it yourself ?
• 13:52
  Guest6599
  myself
• 13:53
  Guest6599
  with v14 works
• 13:53
  Guest6599
  so v16 tx need smth more except varint type
• 13:53
  moneromooo
  Looking at the code, the format shuild be the same as currently, just with one extra byte at the end.
• 13:54
  moneromooo
  Not varint. Just a byte.
• 13:54
  Guest6599
  to the end of tx?
• 13:54
  Guest6599
  or to the end of varint
• 13:54
  moneromooo
  End of the output. So right after the output pubkey.
• 13:54
  Guest6599
  ok i give a try right now
• 13:54
  moneromooo
  See "struct txout_to_tagged_key"
• 14:34
  Guest6599
  moneromooo yes one extra byte was needed
• 14:34
  Guest6599
  thank you.
• 14:38
  sech1
  Did you fix it properly or just stuffed some random byte there?
• 14:38
  sech1
  View tag must be calculated correctly, or wallets will not see this transaction
• 14:39
  Guest6599
  00
• 14:39
  Guest6599
  what i must add?
• 14:39
  sech1
  0 byte? Can you tell me what software/service you're working on, so I'll never use it again :D
• 14:40
  Guest6599
  is a new blockchain that start from v16
• 14:41
  sech1
  did you look at monero-project/monero #8061 ? The code to calculate view tag is there
• 14:42
  hyc
  lol.... new blockchain, so yeah, no one will ever use it
• 14:42
  Guest6599
  how do u know hyc?
• 14:43
  hyc
  correction: nobody with half a brain cell will ever use it.
• 14:43
  hyc
  because it's clear that nobody will be able to maintain it.
• 14:43
  plowsof[m]
  Is Guest a Monero Classic dev?
• 14:44
  Guest6599
  !no
• 14:44
  Guest6599
  im not a dev
• 14:46
  Guest6599
  im someone experimenting with the best crypto code ever made
• 14:47
  Guest6599
  if view tag is not calculated correctly this doesn't mean that wont be accept  from wallet
• 14:50
  Guest6599
  print_block print the right tx
• 14:50
  moneromooo
  The view tag is a way for hte wallet to "quickly" (enough) reject txes. If you put a wrong one, it means it's got a 255/256 chance of being wrongly thought to not be for the scanning wallet if it actually is.
• 14:50
  moneromooo
  It's still in the chain, but the wallet will not fully decode it because it doesn't realize it's to it.
• 14:56
  hyc
  he never even thanked you for the explanation...
• 20:03
  Guest6599
  moneromooo thnx for wallet explanation too
• 20:15
  Guest6599
  hyc i thanked before moneromooo so is unnecessary  what u wrote
• 20:15
  Guest6599
  anyway
• 20:15
  moneromooo
  np
• 20:29
  Guest6599
  sech1 what is  "sender-receiver shared secret "
• 20:30
  Guest6599
  im reading view tags but i cant understand " view tag is derived from the sender-receiver shared secret (view tag = first byte of hash(shared secret)"
• 20:40
  Guest6599
  how to calculate view tag
• 20:47
  Guest6599
  anyone knows whatis  "sender-receiver shared secret "