21ad4e26ec test: add coverage for cross-chain wallet restore (Sebastian Falbesoner)
8c7222bda3 wallet: fix GUI crash on cross-chain legacy wallet restore (Sebastian Falbesoner)
Pull request description:
Restoring a wallet backup from another chain should result in a dedicated error message (we have _"Wallet files should not be reused across chains. Restart bitcoind with -walletcrosschain to override."_ for that). Unfortunately this is currently not the case for legacy wallet restores, as in the course of cleaning up the newly created wallet directory a `filesystem_error` exception is thrown due to the directory not being empty; the wallet database did indeed load successfully (otherwise we wouldn't know that the chain doesn't match) and hence BDB-related files and directories are already created in the wallet directory.
For bitcoind, this leads to a very confusing error message:
```
$ ./src/bitcoin-cli restorewallet test123 ~/.bitcoin/regtest/wallets/regtest_wallet/wallet.dat
error code: -1
error message: filesystem error: in remove: Directory not empty ["/home/thestack/.bitcoin/wallets/test123"]
```
Even worse, the GUI crashes in such a scenario:
```
libc++abi: terminating with uncaught exception of type std::__1::__fs::filesystem::filesystem_error: filesystem error: in remove: Directory not empty ["/home/thestack/.bitcoin/wallets/foobar"]
Abort trap (core dumped)
```
Fix this by simply deleting the whole folder via `fs::remove_all`. With this, the expected error message appears both for the `restorewallet` RPC call and in the GUI (as a message-box):
```
$ ./src/bitcoin-cli restorewallet test123 ~/.bitcoin/regtest/wallets/regtest_wallet/wallet.dat
error code: -4
error message:
Wallet loading failed. Wallet files should not be reused across chains. Restart bitcoind with -walletcrosschain to override.
```
ACKs for top commit:
achow101:
ACK 21ad4e26ec
aureleoules:
ACK 21ad4e26ec
furszy:
utACK 21ad4e26
Tree-SHA512: 313f6494c2fbe823bff9b975cb2d9410bb518977a1e59a5159ee9836bc012947fa50b56be0e41b1a2f50d9c0c7f4fddfdf4fbe479d8a59a6ee44bb389c804abc
fa10f193b5 test: Set default in add_wallet_options if only one type can be chosen (MacroFake)
555519d082 test: Remove wallet option from non-wallet tests (MacroFake)
fac8d59d31 test: Set -disablewallet when no wallet has been compiled (MacroFake)
fa68937b89 test: Make requires_wallet private (MacroFake)
Pull request description:
The tests have several issues:
* Some tests that are wallet-type specific offer the option to run the test with the incompatible type
For example, `wallet_dump.py` offers `--descriptors` and on current master fails with `JSONRPCException: Invalid public key`. After the changes here, it fails with a clear error: `unrecognized arguments: --descriptors`.
* Tests that don't use the wallet at all offer the option to run it with a wallet type. This is confusing and wastes developers time if they are "tricked" into running the test for both wallet types, even though no wallet code is executed at all.
For example, `feature_addrman.py` will happily accept and run with `--descriptors` or `--legacy-wallet`. After the changes here, it no longer silently ignores the flag, but reports a clear error: `unrecognized arguments`.
ACKs for top commit:
achow101:
ACK fa10f193b5
Tree-SHA512: a5784da7305f4ec58c0013f433289000d94fc3d434b00fc329ffa37b812e2cd1da0071e34c3462bf79d904808564f2ae6d3d582f6b86b26215f9b07391b58460
Review note: The changes are complete, because self.options.descriptors
is set to None in parse_args (test_framework.py).
A value of None implies -disablewallet, see the previous commit.
So if a call to add_wallet_options is missing, it will lead to a test
failure when the wallet is compiled in.
