16e95bda86 Move maximum timewarp attack threshold back to 600s from 7200s (Matt Corallo)
Pull request description:
In 6bfa26048d the testnet4 timewarp attack fix block time variation was increased from the Great Consensus Cleanup value of 600s to 7200s on the thesis that this allows miners to always create blocks with the current time. Sadly, doing so does allow for some nonzero inflation, even if not a huge amount.
While it could be that some hardware ignores the timestamp provided to it over Stratum and forces the block header timestamp to the current time, I'm not aware of any such hardware, and it would also likely suffer from random invalid blocks due to relying on NTP anyway, making its existence highly unlikely.
This leaves the only concern being pools, but most of those rely on work generated by Bitcoin Core (in one way or another, though when spy mining possibly not), and it seems likely that they will also not suffer any lost work. While its possible that a pool does generate invalid work due to spy mining or otherwise custom logic, it seems unlikely that a substantial portion of hashrate would do so, making the difference somewhat academic (any pool that screws this up will only do so once and the network would come out just fine).
Further, while we may end up deciding these assumptions were invalid and we should instead use 7200s, it seems prudent to try with the value we "want" on testnet4, giving us the ability to learn if the compatibility concerns are an issue before we go to mainnet.
ACKs for top commit:
fjahr:
tACK 16e95bda86
achow101:
ACK 16e95bda86
murchandamus:
crACK 16e95bda86
Tree-SHA512: ae46d03b728b6e23cb6ace64c9813bc01c01e38dd7f159cf0fab53b331ef84b3b811edab225453ccdfedb53b242f55b0efd69829782657490fe393d24dacbeb2
6ed424f2db wallet: fix, detect blank legacy wallets in IsLegacy (furszy)
Pull request description:
Blank legacy wallets do not have active SPKM. They can only be
detected by checking the descriptors' flag or the db format.
This enables the migration of blank legacy wallets in the GUI.
To test this:
1) Create a blank legacy wallet.
2) Try to migrate it using the GUI's toolbar "Migrate Wallet" button.
-> In master: The button will be disabled because `CWallet::IsLegacy()` returns false for blank legacy wallet.
-> In this PR: the button will be enabled, allowing the migration of legacy wallets.
ACKs for top commit:
achow101:
ACK 6ed424f2db
tdb3:
ACK 6ed424f2db
glozow:
ACK 6ed424f2db
Tree-SHA512: c06c4c4c2e546ccb033287b9aa3aee4ca36b47aeb2fac6fbed5de774b65caef9c818fc8dfdaac6ce78839b2d5d642a5632a5b44c5e889ea169ced80ed50501a7
The re-init is expensive, so skip it if there is no need.
Also, add an even faster fuzz target utxo_snapshot_invalid, which does
not need any re-init at all.
f550a8e035 Rename ReleaseWallet to FlushAndDeleteWallet (furszy)
64e736d79e wallet: WaitForDeleteWallet, do not expect thread safety (Ryan Ofsky)
8872b4a6ca wallet: rename UnloadWallet to WaitForDeleteWallet (furszy)
5d15485aaf wallet: unload, notify GUI as soon as possible (furszy)
Pull request description:
Coming from #29073.
Applied ryanofsky suggested changes on https://github.com/bitcoin/bitcoin/issues/29073#issuecomment-2274237242 with few modifications coming from https://github.com/bitcoin/bitcoin/pull/18338#issuecomment-605060348.
The only point I did not tackle from https://github.com/bitcoin/bitcoin/pull/18338#issuecomment-605060348 is:
> * Move log print and flush out of ReleaseWallet into CWallet destructor
Because it would mean every `CWallet` object would flush data to disk during destruction. Which is not necessary for wallet tool utilities and unit tests.
ACKs for top commit:
achow101:
ACK f550a8e035
ryanofsky:
Code review ACK f550a8e035. Just a simple rename since last review
ismaelsadeeq:
Re-ACK f550a8e035
Tree-SHA512: e2eb69bf36883c514f601f4838ae6a41113996b9559abf8dc2b46e16bbcdad401195ac0f2b9d1fb55a10e78bb8ea9953788a168c80474e3f101350d208cb3bd2
1610643c8b chainparams: add mainnet assumeutxo param at height 840_000 (Sjors Provoost)
Pull request description:
This adds snapshot parameters for mainnet block 840,000.
You can generate the snapshot yourself using `./contrib/devtools/utxo_snapshot.sh` or download my torrent:
* torrent: `magnet:?xt=urn:btih:596c26cc709e213fdfec997183ff67067241440c&dn=utxo-840000.dat&tr=udp%3A%2F%2Ftracker.bitcoin.sprovoost.nl%3A6969`
It would be a good idea to test:
1. That you can produce the same snapshot file, sha256 sum:
```
dc4bb43d58d6a25e91eae93eb052d72e3318bd98ec62a5d0c11817cefbba177b utxo-840000.dat
```
2. That the snapshot works
ACKs for top commit:
fjahr:
re-ACK 1610643c8b
achow101:
ACK 1610643c8b
theStack:
Tested ACK 1610643c8b
mzumsande:
tested ACK 1610643c8b
willcl-ark:
tACK 1610643c8b
Tree-SHA512: 581d8e86379bb044324f04f8559dd0a8946b6e2b145d5f25b38727b30b8cf13d6ac3c8777ff06554d3cf1a072809f7b5fbd693239868578f25dceafe5ba5f57c
9b29755520 Deduplicate list of chain strings in RPC help texts (Martin Saposnic)
Pull request description:
As mentioned in issue https://github.com/bitcoin/bitcoin/issues/30645:
Many command line parameter and RPC help texts currently contain the list of chain/network names hardcoded ("main, test, testnet4, signet, regtest"), which is error-prone as it can easily happen to miss an instance if the list ever changes again.
This PR deduplicates the list of possible chain/network strings in RPC/parameter help texts, and it creates a macro `LIST_CHAIN_NAMES` in src/chainparamsbase.h. In the future, there is only 1 place where that list of possible values lives, so maintainability is improved and errors are avoided.
All three places where this change impacts:
```
./bitcoin-cli --help
./bitcoin-cli help getblockchaininfo
./bitcoin-cli help getmininginfo
```
They all return the correct string `"main, test, testnet4, signet, regtest"`
See https://github.com/bitcoin/bitcoin/pull/30642#discussion_r1714711575
ACKs for top commit:
maflcko:
lgtm ACK 9b29755520
achow101:
ACK 9b29755520
MarnixCroes:
ACK 9b29755520
theStack:
ACK 9b29755520
danielabrozzoni:
ACK 9b29755520
Tree-SHA512: 1e961bcbe40b0f17a87a2437eb4ba1bb89468fd1b5a39599d72a00ef75cb4009e7d2f05d0a621bb904fecf681c55b8a219fcfe4d44d5d27f27cdda20882b1323
