Does the RPC wallet have an equivalent to the freeze/thaw commands? It does not appear to be in the documentation, web.getmonero.org/resources/developer-guides/wallet-rpc.html

hyc: I'm suspicious of Blockchain::block_longhash_worker. It's calling get_block_longhash, which ends up calling rx_slow_hash with no seed_hash, which means "not an alt block".

But this is calling many hashes in parallel, so the hash being calculated may not be the one for the tip of the current chain.

This "alt block" flag is very confusing, and I'm not sure what the fix should be (always set the is_alt flag when called from this parallel function ?)

what do you mean it calls rx_slow_hash with no seed_hash?

:q

It goes through: bool get_block_longhash(const Blockchain *pbc, const block& b, crypto::hash& res, const uint64_t height, const crypto::hash *seed_hash, const int miners)

seed_hash is NULL

This gets used as !!seed_hash for is_alt.

worker calls crypto::hash pow = get_block_longhash(this, block, height++, 0);

which calls rx_slow_hash(main_height, seed_height, hash.data, bd.data(), bd.size(), res.data, miners, 0)

seed is always provided

Oh, the !!seed_hash is mine indeed, sorry. Still, 0 means "not alt" so the questiuon remaisns.

the seedheight toggle will take care of it

Yes, that's the thing that I do not understand.

0 here means not alt (so main). But those calls aren't necessarily ordered.

And they could straddle an epoch (backwards, if unlucky).

the seedhash slot for the current tip is shared across arbitrarily many threads

access to the althash slot is mutex'd

serialized

crossing an epoch boundary is also already handled

note /* RPC could request an earlier block on mainchain */

even if is_alt is passed in as zero, we can toggle it on if the block isn't actually on the current epoch

So does this imply that one should be able to call rx_slow_hash with 0 or !0 for is_alt, and the result will always be correct, it's just a performance thing ?

mainly, yeah

is_alt means we expect it to be using a different seedhash than main, but it's possible that it will be the same

Alright. Thanks.

basically, is_alt=1 on entry definitely means it's an alt block, but if the divergence didn't cross an epoch boundary we can still use the same seedhash as mainchain

hi all! i'm having trouble building monero-gui 0.16. it seems the application needs two headers (span.h and net/http_client.h) from monero, i think they are in contrib/. i'm already building monero with -DBUILD_GUI_DEPS=ON but these headers are not being installed. what am i missing?

Try in #monero-gui

moneromoo: i think the problem is in the build of monero, not monero-gui

are you following the readme or are you trying to do something else?

selsta: kind of, i'm updating the Nix package that (currently) builds monero 0.15 to 0.16. at the same time i have to update the monero-gui package, which depends on monero

i can build monero 0.16 and it looks ok, but some headers that are apparently needed to build monero-gui from source are not being installed

not sure what you mean with installed, monero is a submodule of monero-gui and it takes the headers from the the monero submodule

I think he's not using build.sh. Anyway, #monero-gui.

all right, i'll ask there

thank you