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Merge bitcoin/bitcoin#29510: wallet: getrawchangeaddress
and getnewaddress
failures should not affect keypools for descriptor wallets
e073f1dfda7a2a2cb2be9fe2a1d576f122596021 test: make sure keypool sizes do not change on `getrawchangeaddress`/`getnewaddress` failures (UdjinM6)
367bb7a80cc71130995672c853d4a6e0134721d6 wallet: Avoid updating `ReserveDestination::nIndex` when `GetReservedDestination` fails (UdjinM6)
Pull request description:
I think the expected behaviour of `getrawchangeaddress` and `getnewaddress` RPCs is that their failure should not affect keypool in any way. At least that's how legacy wallets work, you can confirm this behaviour by running `wallet_keypool.py --legacy-wallet` on master with e073f1dfda7a2a2cb2be9fe2a1d576f122596021 applied on top. However running `wallet_keypool.py --descriptors` on the same commit results in the following failure:
```
File "/path/to/bitcoin/test/functional/test_framework/test_framework.py", line 131, in main
self.run_test()
File "/path/to/bitcoin/test/functional/wallet_keypool.py", line 114, in run_test
assert_equal(kp_size_before, kp_size_after)
File "/path/to/bitcoin/test/functional/test_framework/util.py", line 57, in assert_equal
raise AssertionError("not(%s)" % " == ".join(str(arg) for arg in (thing1, thing2) + args))
AssertionError: not([18, 24] == [19, 24])
```
This happens because we pass `nIndex` (which is a class member) into `GetReservedDestination` and since it's passed by reference we get an updated value back, so `nIndex` won't be equal `-1` anymore, no matter if the function failed or succeeded. This means that `ReturnDestination` (called by dtor of `ReserveDestination`) will try to return something we did not actually reserve.
The fix is to simply use a temporary variable instead of a class member and only update `nIndex` when `op_address` actually has value, basically do it the same way we do for other class members (`address` and `fInternal`) already.
ACKs for top commit:
achow101:
ACK e073f1dfda7a2a2cb2be9fe2a1d576f122596021
josibake:
ACK e073f1dfda
Tree-SHA512: 1128288a60dd4d8f306ef6f7ac66cdfeae3c9cc35c66ecada2d78fa61ac759f2a757b70fc3976ba8b5081200942b58dfabc184c01ccf911af40ba8c145344651
This commit is contained in:
parent
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commit
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@ -4206,9 +4206,11 @@ bool ReserveDestination::GetReservedDestination(CTxDestination& dest, bool fInte
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m_spk_man->TopUp();
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CKeyPool keypool;
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if (!m_spk_man->GetReservedDestination(fInternalIn, address, nIndex, keypool)) {
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int64_t index;
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if (!m_spk_man->GetReservedDestination(fInternalIn, address, index, keypool)) {
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return false;
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}
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nIndex = index;
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fInternal = keypool.fInternal;
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}
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dest = address;
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@ -101,12 +101,19 @@ class KeyPoolTest(BitcoinTestFramework):
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nodes[0].getrawchangeaddress()
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nodes[0].getrawchangeaddress()
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nodes[0].getrawchangeaddress()
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# remember keypool sizes
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wi = nodes[0].getwalletinfo()
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kp_size_before = [wi['keypoolsize_hd_internal'], wi['keypoolsize']]
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# the next one should fail
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try:
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nodes[0].getrawchangeaddress()
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raise AssertionError('Keypool should be exhausted after six addresses')
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except JSONRPCException as e:
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assert e.error['code']==-12
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# check that keypool sizes did not change
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wi = nodes[0].getwalletinfo()
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kp_size_after = [wi['keypoolsize_hd_internal'], wi['keypoolsize']]
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assert_equal(kp_size_before, kp_size_after)
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addr = set()
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# drain the external keys
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@ -117,12 +124,19 @@ class KeyPoolTest(BitcoinTestFramework):
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addr.add(nodes[0].getnewaddress())
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addr.add(nodes[0].getnewaddress())
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assert len(addr) == 6
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# remember keypool sizes
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wi = nodes[0].getwalletinfo()
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kp_size_before = [wi['keypoolsize_hd_internal'], wi['keypoolsize']]
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# the next one should fail
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try:
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addr = nodes[0].getnewaddress()
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raise AssertionError('Keypool should be exhausted after six addresses')
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except JSONRPCException as e:
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assert e.error['code']==-12
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# check that keypool sizes did not change
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wi = nodes[0].getwalletinfo()
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kp_size_after = [wi['keypoolsize_hd_internal'], wi['keypoolsize']]
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assert_equal(kp_size_before, kp_size_after)
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# refill keypool with three new addresses
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nodes[0].walletpassphrase('test', 1)
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