06:48:55 <Guest6599> hello
06:49:23 <Guest6599> how to calculate view tag from tx
06:53:07 <Guest6599> from what "shared secret" is derived
06:59:00 <sech1> Read crypto_ops::derive_view_tag and the code that calls it. If you can't read the code and learn, sorry but you're not qualified for this.
07:01:12 <Guest6599> ok
07:15:43 <sech1> "shared secret" = derivation, it's generated from public view key and a random number, see crypto::generate_key_derivation
07:16:20 <sech1> read https://www.getmonero.org/library/Zero-to-Monero-2-0-0.pdf - "4.2 One-time addresses"
07:16:20 <Guest6599> thnx
07:16:57 <Guest6599> you mean stealth address
07:17:08 <Guest6599> i know to create
07:18:29 <sech1> no, not a stealth address
07:18:31 <sech1> derivation
07:18:47 <Guest6599> derivation from  stealth address
07:19:15 <sech1> stealth address is calculated from derivation, spend public key and output index
07:19:33 <Guest6599> ah
07:20:08 <moneromooo> There are no stealth addresses in monero. You're talking about output public keys. You can't send anything to them.
07:21:11 <sech1> stealth addresses aka one-time addresses
07:21:18 <Guest6599> yes
07:21:29 <Guest6599> var D = generate_key_derivation(A, r);
07:21:33 <Guest6599> this one?
07:21:40 <Guest6599> is javascript
07:29:15 <Guest6599> shared secret =  var A = sec_key_to_pub(a)  + var r
07:29:19 <Guest6599> right?
10:29:27 <Guest6599> ηελλο
10:29:32 <Guest6599> hello
10:54:32 <Guest6599>  "key": "ea3f...",
10:54:32 <Guest6599>       "view_tag": "a1"
10:54:57 <Guest6599> view_tag must be "ea" or im wrong
10:55:41 <Guest6599> or i must run siphash to have a1
10:56:38 <Guest6599> im not very good on extracting c++ function from monero to use elsewhere
11:02:26 <moneromooo> It is most definitely not a copy of the key's first byte.
11:02:43 <moneromooo> That'd make it useless (assuming the key is the output public key).
11:03:06 <Guest6599> the key is one time address
11:03:36 <moneromooo> Right, that's it. You'll have some crypto to run to generate it.
11:04:27 <Guest6599> i know how to generate it but i dont have function to create view_tag from one time address
11:04:36 <moneromooo> But if you're not letting the monero code generate your tx in th first place, you already had to run a lot of crypto  code, so a bit more should be no trouble.
11:05:32 <Guest6599> to create a tx is easy done from luigi page
11:06:19 <Guest6599> at the time that luigi did that page view_tag didnt exist....
11:06:27 <moneromooo> Oh I see. Then I guess you find someone willing to update that page to create those view tags..
11:07:31 <Guest6599> im trying to understand which function of all do hashing of one time address so we have view_tag
11:07:51 <Guest6599> until now i cant...
11:08:41 <Guest6599> as sech1 told i read many time crypto_ops::derive_view_tag but is not easy to understand all
11:47:58 <Guest6599> sech1 i think that here view_tag is created but im not very sure
11:47:59 <Guest6599> cryptonote_format_utils.cpp
12:01:18 <Guest6599> anyone on how to create view tag from one time address
12:03:08 <moneromooo> Did you check the view tag PR on github btw ? Might be a more english less code explanation.
12:04:46 <sech1> you don't create view tag from one time address
12:04:55 <sech1> you create it from derivation and output index
12:05:48 <Guest6599> output index is  most of time 1
12:05:57 <Guest6599> what is derivation
12:06:26 <Guest6599> im checking moneromooo
12:06:33 <moneromooo> Should be 0 or 1 half the time on average, assuming 2 out txes. If it's mostly 1, it suggests a bug.
12:06:33 <Guest6599> all this hours...
12:06:53 <moneromooo> Though maybe luigi's page doesn't bother with this if it's a demo.
12:22:42 <Guest6599> sech1 what is derivation
12:26:21 <Guest6599> or better i need a new private tx key or i use what i have
12:32:04 <sech1> derivation = shared secret = rK(v,B) in https://www.getmonero.org/library/Zero-to-Monero-2-0-0.pdf on page 38
12:32:19 <sech1> I'll charge my hourly rate of 1 XMR/hour for further consultations
12:45:56 <Guest6599> in which case  the output index is not 0
13:03:41 <Guest6599> anyway thnx sech1
13:03:48 <Guest6599> thnx again moneromooo
20:45:49 <aldcor> can I cash out monero anonymosly?
20:46:07 <aldcor> i assume only way it via exchange but.. exchanges require ID
20:49:59 <sech1> https://localmonero.co/ is probably your best chance