📝 marcofleon opened a pull request: "fuzz: Add target for coins database"
(https://github.com/bitcoin/bitcoin/pull/32602)
This reopens https://github.com/bitcoin/bitcoin/pull/28216.

The current `coins_view` target only tests `CCoinsViewCache` using a basic `CCoinsView` instance. The addition of the `coins_view_db` target enables testing with an actual `CCoinsViewDB` as the backend.

💬 hebasto commented on pull request "test: Fix `system_tests/run_command` test":
(https://github.com/bitcoin/bitcoin/pull/32601#discussion_r2104788947)
`subprocess` uses space and tab as delimiters:https://github.com/bitcoin/bitcoin/blob/2df824f4e62b6bc569044819cd64f66f3839ba13/src/util/subprocess.h#L307-L334

💬 marcofleon commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#issuecomment-2904747826)
The coverage between the two targets can be compared [here](https://marcofleon.github.io/coverage/coins_view/) and [here](https://marcofleon.github.io/coverage/coins_view_db/).

Instability was a bit of a concern in the last PR, but was answered in https://github.com/bitcoin/bitcoin/pull/28216#issuecomment-2754900599.

💬 fanquake commented on pull request "fuzz: a new target for the coins database":
(https://github.com/bitcoin/bitcoin/pull/28216#issuecomment-2904748427)
Picked up in #32602.

💬 davidgumberg commented on pull request "ci: remove 3rd party js from windows dll gha job":
(https://github.com/bitcoin/bitcoin/pull/32513#issuecomment-2904755024)
This approach here should also be applied to replace the `Find mt.exe tool` step in the `Windows, test cross-built` job.

💬 theStack commented on pull request "wallet, rpc, doc: various legacy wallet removal cleanups in RPCs":
(https://github.com/bitcoin/bitcoin/pull/32596#discussion_r2104795226)
Ah interesting, wasn't aware that this was proposed already in an earlier PR. Added a link to your comment in the PR description.

💬 gmaxwell commented on issue "compact block fingerprinting":
(https://github.com/bitcoin/bitcoin/issues/28272#issuecomment-2904766683)
FWIW, this is solvable by changing to more fibre like methods for block transmission. Because FEC coded missing data doesn't identify what was missing.

So I had *thought* the code would check if there were too many missing transactions and just request a full block if all were missing. That doesn't address the general attack (since the attacker could admit some real txn that are in the block) but it would mostly address the blocksonly case (and could easily get a if blocksonly check so that i
...

💬 theStack commented on pull request "wallet, rpc, doc: various legacy wallet removal cleanups in RPCs":
(https://github.com/bitcoin/bitcoin/pull/32596#discussion_r2104807129)
As this is an optional return field, I wouldn't consider its removal as a breaking change, considering that the condition for returning a value (i.e. executing the RPC on a legacy wallet) can't be fulfilled anymore. Curious about other opinions though; I guess one could argue that there is still a point in mentioning the removal in the release notes?

📝 rkrux opened a pull request: "wallet, rpc: clarify wallet version in getwalletinfo help"
(https://github.com/bitcoin/bitcoin/pull/32603)
I noted in review of a previous PR here: https://github.com/bitcoin/bitcoin/pull/32553#pullrequestreview-2853743852.

Relaying the same information in the RPC help that's present in a code comment: https://github.com/bitcoin/bitcoin/blob/af65fd1a333011137dafd3df9a51704fd319feb4/src/wallet/wallet.h#L809-L810

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🤔 l0rinc reviewed a pull request: "fuzz: Add target for coins database"
(https://github.com/bitcoin/bitcoin/pull/32602#pullrequestreview-2864770398)
Concept ACK

Quickly reviewed it again, will do it more deeply later - do we still need the `cachedCoinsUsage` comment after https://github.com/bitcoin/bitcoin/pull/32313, which should fix the accounting bug instead of working around it?

💬 l0rinc commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#discussion_r2104799482)
There's a helper introduced since:
```suggestion
.cache_bytes = 1_MiB,
```

💬 l0rinc commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#discussion_r2104802538)
I still think this comment is way to verbose, we don't need that much context here.
Is this still needed after [`327ee45` (#32313)](https://github.com/bitcoin/bitcoin/pull/32313/commits/327ee453cab9d7c8482f74b195f2be6c6f1a4cc9) where we might not get into the described situation anymore since `cachedCoinsUsage` update only happens after the mentioned exception now.

💬 l0rinc commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#discussion_r2104798281)
nit: in other cases in this file the param hints are written as:
```suggestion
TestCoinsView(fuzzed_data_provider, coins_db, /*is_db=*/ true);
```

💬 l0rinc commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#discussion_r2104812882)
The default value for `is_db` may not be intuitive, can we make it explicit instead?

💬 l0rinc commented on pull request "fuzz: Add target for coins database":
(https://github.com/bitcoin/bitcoin/pull/32602#discussion_r2104819427)
can you please add a short comment to the `best_block = uint256::ONE` cases?

💬 rkrux commented on pull request "wallet, rpc, doc: various legacy wallet removal cleanups in RPCs":
(https://github.com/bitcoin/bitcoin/pull/32596#discussion_r2104831591)
Ah, I note now that its presence was conditional on legacy wallets.

💬 maflcko commented on pull request "test: Fix `system_tests/run_command` test":
(https://github.com/bitcoin/bitcoin/pull/32601#discussion_r2104835433)
Then it seems like it should be fixed in `RunCommandParseJSON`, because real users could run into the bug as well?

`RunCommandParseJSON` should just take a string and then pass it to the shell as-is?

💬 hebasto commented on pull request "subprocess: Let shell parse command on non-Windows systems":
(https://github.com/bitcoin/bitcoin/pull/32577#issuecomment-2904837194)
> * It would probably be good if the new behavior were controlled by a shell boolean option like python & the upstream library

Reverting 633e45b2e2728efcb0637afa94fcbd5756dfbe76 is still an option on the table. https://github.com/bitcoin/bitcoin/pull/32566 may also [benefit](https://github.com/bitcoin/bitcoin/pull/32566#discussion_r2099983137) from it.

The issues mentioned in https://github.com/bitcoin/bitcoin/pull/32577#issuecomment-2899448860 might be addressed by switching to an alterna
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💬 instagibbs commented on issue "compact block fingerprinting":
(https://github.com/bitcoin/bitcoin/issues/28272#issuecomment-2904837679)
Dropping seemingly-unsolicited compact blocks seems fine, we already do that for the parallel portion, this should be a change just to the first one? blocksonly nodes should never set cb peers.

💬 hebasto commented on pull request "test: Fix `system_tests/run_command` test":
(https://github.com/bitcoin/bitcoin/pull/32601#discussion_r2104848828)
That was the approach in https://github.com/bitcoin/bitcoin/pull/32577.