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2432 commits

Author SHA1 Message Date
Russell Yanofsky
01a3392b1b Drop bitcoin-wallet dependency on libevent
Don't require urlDecode function in wallet code since urlDecode implementation
currently uses libevent. Just call urlDecode indirectly though URL_DECODE
function pointer constant if available.

In bitcoind and bitcoin-qt, URL_DECODE is implemented and used to interpret RPC
wallet requests. In bitcoin-wallet, URL_DECODE is null to avoid depending on
libevent.
2020-04-02 08:35:10 -04:00
MarcoFalke
fab32557f2
rpc: Make rpc documentation not depend on rpc args 2020-04-02 00:25:13 +08:00
Fabian Jahr
bda84a08a0
rpc: Add documentation for deactivating settxfee 2020-03-31 17:07:33 +02:00
Russell Yanofsky
48973402d8 wallet: Avoid use of Chain::Lock in CWallet::GetKeyBirthTimes
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip, where it will treat the last block processed as the
current tip.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
e958ff9ab5 wallet: Avoid use of Chain::Lock in CWallet::CreateTransaction
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip, where it may set a different lock time.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
c0d07dc4cb wallet: Avoid use of Chain::Lock in CWallet::ScanForWalletTransactions
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change affects behavior in a few small ways.

- If there's no max_height specified, percentage progress is measured ending at
  wallet last processed block instead of node tip

- More consistent error reporting: Early check to see if start_block is on the
  active chain is removed, so start_block is always read and the triggers an
  error if it's unavailable
2020-03-31 08:36:02 -05:00
Russell Yanofsky
1be8ff280c wallet: Avoid use of Chain::Lock in rescanblockchain
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip. The rescanblockchain error height error checking
will just be stricter in this case and only accept values up to the last
processed height
2020-03-31 08:36:02 -05:00
Russell Yanofsky
3cb85ac594 wallet refactor: Avoid use of Chain::Lock in CWallet::RescanFromTime
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change has no effect on behavior.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
f7ba881bc6 wallet: Avoid use of Chain::Lock in listsinceblock
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip. Previously listsinceblock might not have returned
all transactions up to the claimed "lastblock" value in this case, resulting in
race conditions and potentially missing transactions in cases where
listsinceblock was called in a loop like
https://github.com/bitcoin/bitcoin/issues/14338#issuecomment-426706574
2020-03-31 08:36:02 -05:00
Russell Yanofsky
bc96a9bfc6 wallet: Avoid use of Chain::Lock in importmulti
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip, in which case it may use a more accurate rescan
time.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
25a9fcf9e5 wallet: Avoid use of Chain::Lock in importwallet and dumpwallet
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip, in which case it will use more accurate backup and
rescan timestamps.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
c1694ce6bb wallet: Avoid use of Chain::Lock in importprunedfunds
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change only affects behavior in the case where wallet last block processed
falls behind the chain tip, in which case the "Block not found in chain" error
will be stricter and not allow importing data from a blocks between the wallet
last processed tip and the current node tip.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
f6da44ccce wallet: Avoid use of Chain::Lock in tryGetTxStatus and tryGetBalances
This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

It also helps ensure the GUI display stays up to date in the case where the
node chain height runs ahead of wallet last block processed height.
2020-03-31 08:36:02 -05:00
Russell Yanofsky
bf30cd4922 refactor: Add interfaces::FoundBlock class to selectively return block data
FoundBlock class allows interfaces::Chain::findBlock to return more block
information without having lots of optional output parameters. FoundBlock class
is also used by other chain methods in upcoming commits.

There is mostly no change in behavior. Only exception is
CWallet::RescanFromTime now throwing NonFatalCheckError instead of
std::logic_error.
2020-03-31 08:36:02 -05:00
João Barbosa
ee9e88ba27 wallet: Handle duplicate fileid exception 2020-03-31 14:23:43 +01:00
Wladimir J. van der Laan
9a2b5f22c1
Merge #18338: Fix wallet unload race condition
41b0baf43c gui: Handle WalletModel::unload asynchronous (João Barbosa)
ab31b9d6fe Fix wallet unload race condition (Russell Yanofsky)

Pull request description:

  This PR consists in two fixes. The first fixes a concurrency issues with `boost::signals2`. The second fixes a wallet model destruction while it's being used.

  From boost signal documentation at https://www.boost.org/doc/libs/1_72_0/doc/html/signals2/thread-safety.html:

  > When a signal is invoked by calling signal::operator(), the invocation first acquires a lock on the signal's mutex. Then it obtains a handle to the signal's slot list and combiner. Next it releases the signal's mutex, before invoking the combiner to iterate through the slot list.

  This means that `UnregisterValidationInterface` doesn't prevent more calls to that interface. The fix consists in capturing the `shared_ptr<CValidationInterface>` in each internal slot.

  The GUI bug is fixed by using a `Qt::QueuedConnection` in the `WalletModel::unload` connection.

ACKs for top commit:
  ryanofsky:
    Code review ACK 41b0baf43c. Only change is moving assert as suggested
  hebasto:
    ACK 41b0baf43c, tested on Linux Mint 19.3.

Tree-SHA512: 4f712d8de65bc1214411831250de5dc0a9fd505fb84da5baf9f2cc4d551bc3abffc061616f00afe43dba7525af2cd96c9b54aeead9383145e3b8801f25d85f50
2020-03-31 15:07:06 +02:00
Jon Atack
6e0d82c55b
rpc: remove unused getbalances() code 2020-03-28 20:25:53 +01:00
Andrew Toth
a1d5b12ec0 Merge getreceivedby tally into GetReceived function 2020-03-27 14:26:00 -04:00
Russell Yanofsky
ab31b9d6fe Fix wallet unload race condition
Currently it's possible for ReleaseWallet to delete the CWallet pointer while
it is processing BlockConnected, etc chain notifications.

To fix this, unregister from notifications earlier in UnloadWallet instead of
ReleaseWallet, and use a new RegisterSharedValidationInterface function to
prevent the CValidationInterface shared_ptr from being deleted until the last
notification is actually finished.
2020-03-27 15:17:35 +00:00
MarcoFalke
faaf1cb5b9
util: Replace i64tostr with ToString 2020-03-27 10:14:08 -04:00
Wladimir J. van der Laan
694f4cbd78
Merge #18312: wallet: remove deprecated fee bumping by totalFee
c3857c5fcb wallet: remove CreateTotalBumpTransaction() (Jon Atack)
4a0b27bb01 wallet: remove totalfee from createBumpTransaction() (Jon Atack)
e347cfa9a7 rpc: remove deprecated totalFee arg from RPC bumpfee (Jon Atack)
bd05f96d79 test: delete wallet_bumpfee_totalfee_deprecation.py (Jon Atack)
a6d1ab8caa test: update bumpfee testing from totalFee to fee_rate (Jon Atack)

Pull request description:

  Since 0.19, fee-bumping using `totalFee` was deprecated in #15996 and replaced by `fee_rate` in #16727. This changeset removes it.

ACKs for top commit:
  laanwj:
    ACK c3857c5fcb

Tree-SHA512: c1bb15d664baf4d2dea06981f36384af02057d125c51fcbc8640b9d5563532187c7b84aa952f7b575255a88ce383ed4d7495bec920a47b05b6fc0d432dce1f00
2020-03-26 18:34:49 +01:00
Jon Atack
c3857c5fcb
wallet: remove CreateTotalBumpTransaction() 2020-03-26 17:54:23 +01:00
Jon Atack
e347cfa9a7
rpc: remove deprecated totalFee arg from RPC bumpfee 2020-03-26 17:54:18 +01:00
Wladimir J. van der Laan
2e97d80017
Merge #18134: Replace std::to_string with locale-independent alternative
d056df033a Replace std::to_string with locale-independent alternative (Ben Woosley)

Pull request description:

  Addresses #17866 following practicalswift's suggestion:
  https://github.com/bitcoin/bitcoin/issues/17866#issuecomment-584287299

  ~Used ::ToString to avoid aliasing issues. Left uses in QT and test.~

ACKs for top commit:
  practicalswift:
    ACK d056df033a
  laanwj:
    ACK d056df033a

Tree-SHA512: 9e6966a9cdd14f4a1a40d9f0fa7c402aed22b2f1ad8681708e22b050d51a91c5d62220a9ec4c425be2d57acf5c964fca87a5e981b5cbff048bc3b6720dae92b7
2020-03-25 20:11:47 +01:00
Russell Yanofsky
96dfe5ced6 refactor: Change Chain::broadcastTransaction param order
Make output argument last argument so it works more easily with IPC framework
in #10102, and for consistency with other methods
2020-03-19 15:26:04 -05:00
Russell Yanofsky
6ceb21909c refactor: Rename Chain::Notifications methods to be consistent with other interfaces methods
This also simplifies #10102 removing overrides needed to deal with inconsistent
case convention
2020-03-19 15:26:04 -05:00
Wladimir J. van der Laan
312d27b11c
Merge #17477: Remove the mempool's NotifyEntryAdded and NotifyEntryRemoved signals
e57980b473 [mempool] Remove NotifyEntryAdded and NotifyEntryRemoved callbacks (John Newbery)
2dd561f361 [validation] Remove pool member from ConnectTrace (John Newbery)
969b65f3f5 [validation] Remove NotifyEntryRemoved callback from ConnectTrace (John Newbery)
5613f9842b [validation] Remove conflictedTxs from PerBlockConnectTrace (John Newbery)
cdb893443c [validation interface] Remove vtxConflicted from BlockConnected (John Newbery)
1168394d75 [wallet] Notify conflicted transactions in TransactionRemovedFromMempool (John Newbery)

Pull request description:

  These boost signals were added in #9371, before we had a `TransactionRemovedFromMempool` method in the validation interface. The `NotifyEntryAdded` callback was used by validation to build a vector of conflicted transactions when connecting a block, which the wallet was notified of in the `BlockConnected` CValidationInterface callback.

  Now that we have a `TransactionRemovedFromMempool` callback, we can fire that signal directly from the mempool for conflicted transactions.

  Note that #9371 was implemented to ensure `-walletnotify` events were fired for these conflicted transaction. We inadvertently stopped sending these notifications in #16624 (Sep 2019 commit 7e89994). We should probably fix that, but in a different PR.

ACKs for top commit:
  jonatack:
    Re-ACK e57980b
  ryanofsky:
    Code review ACK e57980b473, no code changes since previous review, but helpful new code comments have been added and the PR description is now more clear about where the old code came from

Tree-SHA512: 3bdbaf1ef2731e788462d4756e69c42a1efdcf168691ce1bbfdaa4b7b55ac3c5b1fd4ab7b90bcdec653703600501b4224d252cfc086aef28f9ce0da3b0563a69
2020-03-19 17:26:51 +01:00
MarcoFalke
ce87d5613a
Merge #18289: refactor: Make scheduler methods type safe
fa36f3a295 refactor: move DUMP_BANS_INTERVAL to banman.h (MarcoFalke)
fadafb83cf scheduler: Make schedule* methods type safe (MarcoFalke)
fa70ccc6c4 scheduler: Use C++11 member initialization, add shutdown assert (MarcoFalke)

Pull request description:

  Main benefit is that stuff like `15 * 60 * 1000` is replaced by `minutes{15}`

ACKs for top commit:
  vasild:
    ACK fa36f3a (code review, not tested)
  ajtowns:
    ACK fa36f3a295
  jonatack:
    ACK fa36f3a

Tree-SHA512: f35f1a1d643dfa676bd47474659f6492ed05cca04cdb556064b126f654a6a44a4b93fcaddcdcd41faf81b8f11439c11e5c7ab88685ba2eef12f7188843d17ad8
2020-03-17 16:34:53 -04:00
James O'Beirne
c9017ce3bc protect g_chainman with cs_main
I'd previously attempted to create a specialized lock for ChainstateManager,
but it turns out that because that lock would be required for functions like
ChainActive() and ChainstateActive(), it created irreconcilable lock inversions
since those functions are used so broadly throughout the codebase.

Instead, I'm just using cs_main to protect the contents of g_chainman.

Co-authored-by: Russell Yanofsky <russ@yanofsky.org>
2020-03-17 14:07:58 -04:00
Wladimir J. van der Laan
25424cf57e
Merge #18346: rpc: Document an RPCResult for all calls; Enforce at compile time
fac52253f8 rpc: Document an RPCResult for all calls; Enforce at compile time (MarcoFalke)
fadd99f610 rpc: Add missing newline in RPCResult description (MarcoFalke)

Pull request description:

  This documents the RPC Result (type and description, if applicable) everywhere it was missing. The patch can be reviewed with the `git diff` option `-W`/`--function-context`.

  Also, code won't compile without having an RPCResult documented.

ACKs for top commit:
  laanwj:
    Lightly tested ACK fac52253f8
  promag:
    Tested ACK fac52253f8, built and verified listunspent help output.

Tree-SHA512: af2c1af1432beb944993776026c320814bfaecaf202f47359f5758849096ca7051ec6560395a2cc6678dcc111e7c9cf4917d0f0b221bdcf3ed1642e14d0e5b3c
2020-03-16 18:04:08 +01:00
Ben Woosley
d056df033a
Replace std::to_string with locale-independent alternative 2020-03-14 12:23:01 -07:00
Daniel Kraft
7df0cf719f Replace remaining literals BTC with CURRENCY_UNIT
This replaces one remaining instance of the literal "BTC" string with
the CURRENCY_UNIT constant, as is done in most of the codebase already.

The other remaining instance (which is just part of a log message and thus
not really user-visible) is just removed.

After this change, no instance of literal "BTC" remains anywhere in the
non-Qt and non-test codebase.
2020-03-14 09:24:21 +01:00
MarcoFalke
fac52253f8
rpc: Document an RPCResult for all calls; Enforce at compile time 2020-03-13 15:36:15 -04:00
MarcoFalke
fadd99f610
rpc: Add missing newline in RPCResult description 2020-03-13 15:35:41 -04:00
John Newbery
cdb893443c [validation interface] Remove vtxConflicted from BlockConnected
The wallet now uses TransactionRemovedFromMempool to be notified about
conflicted wallet, and no other clients use vtxConflicted.
2020-03-11 18:38:33 -04:00
John Newbery
1168394d75 [wallet] Notify conflicted transactions in TransactionRemovedFromMempool
The only CValidationInterface client that cares about transactions that
are removed from the mempool because of CONFLICT is the wallet.

Start using the TransactionRemovedFromMempool method to notify about
conflicted transactions instead of using the vtxConflicted vector in
BlockConnected.
2020-03-11 18:38:27 -04:00
MarcoFalke
58c72880ff
Merge #18268: rpc: Remove redundant types from descriptions
8a2a652e6f Remove redundant type information from rpc docs (David O'Callaghan)

Pull request description:

  Simple edit of the RPC calls to remove redundant text ("A json object/array ...") from the beginning of help.

  Fixes: #18258

Top commit has no ACKs.

Tree-SHA512: cbbf760e0b7b4eda61c40b420ed77f5d878318e37b0eb13e63567212240b2c4ecc15d84030e98075e21c9ae9016539adfd201e5661ea824166a76d335180c32f
2020-03-11 13:28:57 -04:00
MarcoFalke
0eebe45cf7
Merge #18208: rpc: Change RPCExamples to bech32
3e32499909 Change example addresses to bech32 (Yusuf Sahin HAMZA)

Pull request description:

  This is a follow-up PR to #18197 that fixes RPCExamples.

  Fixes #18185.

ACKs for top commit:
  MarcoFalke:
    ACK 3e32499909
  jonatack:
    ACK 3e32499

Tree-SHA512: c7a6410ef8b6e169016c2c5eac3e6b9501caabd0e8a0871ec31e56bfc44589f056d3f5cb55b5a13bba36f6c15136c2352f883e30e4dcc0997ffd36b27f9173b9
2020-03-11 12:42:47 -04:00
MarcoFalke
fadafb83cf
scheduler: Make schedule* methods type safe 2020-03-10 09:47:32 -04:00
Samuel Dobson
dcf2ccbfde
Merge #18115: wallet: Pass in transactions and messages for signing instead of exporting the private keys
d2774c09cf Clear any input_errors for an input after it is signed (Andrew Chow)
dc174881ad Replace GetSigningProvider with GetSolvingProvider (Andrew Chow)
6a9c429084 Move direct calls to MessageSign into new SignMessage functions in CWallet and ScriptPubKeyMan (Andrew Chow)
82a30fade7 Move key and script filling and signing from CWallet::FillPSBT to ScriptPubKeyMan::FillPSBT (Andrew Chow)
3d70dd99f9 Move FillPSBT to be a member of CWallet (Andrew Chow)
a4af324d15 Use CWallet::SignTransaction in CreateTransaction and signrawtransactionwithwallet (Andrew Chow)
f37de92744 Implement CWallet::SignTransaction using ScriptPubKeyMan::SignTransaction (Andrew Chow)
d999dd588c Add SignTransaction function to ScriptPubKeyMan and LegacyScriptPubKeyMan (Andrew Chow)
2c52b59d0a Refactor rawtransaction's SignTransaction into generic SignTransaction function (Andrew Chow)

Pull request description:

  Following #17261, the way to sign transactions, PSBTs, and messages was to use `GetSigningProvider()` and get a `SigningProvider` containing the private keys. However this may not be feasible for future `ScriptPubKeyMan`s, such as for hardware wallets. Instead of exporting a `SigningProvider` containing private keys, we need to pass these things into the `ScriptPubKeyMan` (via `CWallet`) so that they can do whatever is needed internally to sign them. This is largely a refactor as the logic of processing transactions, PSBTs, and messages for is moved into `LegacyScriptPubKeyMan` and `CWallet` instead of being handled by the caller (e.g. `signrawtransaction`).

  To help with this, I've refactored the 3(!) implementations of a `SignTransaction()` function into one generic one. This function will be called by `signrawtransactionwithkey` and `LegacyScriptPubKeyMan::SignTransaction()`. `CWallet::CreateTransaction()` is changed to call `CWallet::SignTransaction()` which in turn, calls `LegacyScriptPubKeyMan::SignTransaction()`. Other `ScriptPubKeyMan`s may implement `SignTransaction()` differently.

  `FillPSBT()` is moved to be a member function of `CWallet` and the `psbtwallet.cpp/h` files removed. It is further split so that `CWallet` handles filling the UTXOs while the `ScriptPubKeyMan` handles adding keys, derivation paths, scripts, and signatures. In the end `LegacyScriptPubKeyMan::FillPSBT` still calls `SignPSBTInput`, but the `SigningProvider` is internal to `LegacyScriptPubKeyMan`. Other `ScriptPubKeyMan`s may do something different.

  A new `SignMessage()` function is added to both `CWallet` and `ScriptPubKeyMan`. Instead of having the caller (i.e. `signmessage` or the sign message dialog) get the private key, hash the message, and sign, `ScriptPubKeyMan` will now handle that (`CWallet` passes through to the `ScriptPubKeyMan`s as it does for many functions). This signing code is thus consolidated into `LegacyScriptPubKeyMan::SignMessage()`, though other `ScriptPubKeyMan`s may implement it differently. Additionally, a `SigningError` enum is introduced for the different errors that we expect to see from `SignMessage()`.

  Lastly, `GetSigningProvider()` is renamed to `GetPublicSigningProvider()`. It will now only provide pubkeys, key origins, and scripts. `LegacySigningProvider` has it's `GetKey` and `HaveKey` functions changed to only return false. Future implementations should return `HidingSigningProvider`s where private keys are hidden.

  Other things like `dumpprivkey` and `dumpwallet` are not changed because they directly need and access the `LegacyScriptPubKeyMan` so are not relevant to future changes.

ACKs for top commit:
  instagibbs:
    reACK d2774c09cf
  Sjors:
    re-utACK d2774c09cf
  meshcollider:
    re-utACK d2774c09cf

Tree-SHA512: 89c83e7e7e9315e283fae145a2264648a9d7f7ace8f3281cb3f44f0b013c988d67ba4fa9726e50c643c0ed921bdd269adaec984840d11acf4a681f3e8a582cc1
2020-03-10 09:02:12 +13:00
Andrew Chow
dc174881ad Replace GetSigningProvider with GetSolvingProvider
Not all ScriptPubKeyMans will be able to provide private keys,
but pubkeys and scripts should be. So only provide public-only
SigningProviders, i.e. ones that can help with Solving.
2020-03-09 11:16:20 -04:00
Andrew Chow
6a9c429084 Move direct calls to MessageSign into new SignMessage functions in CWallet and ScriptPubKeyMan
Instead of getting a SigningProvider and then going to MessageSign,
have ScriptPubKeyMan handle the message signing internally.
2020-03-09 11:16:20 -04:00
Andrew Chow
82a30fade7 Move key and script filling and signing from CWallet::FillPSBT to ScriptPubKeyMan::FillPSBT
Instead of fetching a SigningProvider from ScriptPubKeyMan in order
to fill and sign the keys and scripts for a PSBT, just pass that
PSBT to a new FillPSBT function that does all that for us.
2020-03-09 11:16:20 -04:00
Andrew Chow
3d70dd99f9 Move FillPSBT to be a member of CWallet 2020-03-09 11:16:17 -04:00
fanquake
6ddf435493
Merge #18274: rpc/wallet: initialize nFeeRequired to avoid using garbage value on failure
a652ba6293 rpc/wallet: initialize nFeeRequired to avoid using garbage value on failure (Karl-Johan Alm)

Pull request description:

  Initialize the `nFeeRequired` variable to avoid using an uninitialized value for errors happening before it is set to 0.

  Note: this originally fixed `nFeeRet` in `wallet.cpp`.

ACKs for top commit:
  promag:
    ACK a652ba6293.
  Sjors:
    utACK a652ba6293
  practicalswift:
    ACK a652ba6293 -- patch looks correct
  meshcollider:
    utACK a652ba6293

Tree-SHA512: 0d12f1ffd0851ed5ce6d109d2c87f55e8b1d57da297e684feeabb57229200c4078f029c55ca5aa5712bd18e26dda3ce538443dfe68a7a6d504428068f81fded0
2020-03-09 19:17:51 +08:00
Karl-Johan Alm
a652ba6293
rpc/wallet: initialize nFeeRequired to avoid using garbage value on failure 2020-03-09 10:20:41 +09:00
Andrew Chow
a4af324d15 Use CWallet::SignTransaction in CreateTransaction and signrawtransactionwithwallet
Instead of duplicating signing code, just use the function we already
have.
2020-03-08 12:27:05 -04:00
Andrew Chow
f37de92744 Implement CWallet::SignTransaction using ScriptPubKeyMan::SignTransaction 2020-03-08 12:26:32 -04:00
Andrew Chow
d999dd588c Add SignTransaction function to ScriptPubKeyMan and LegacyScriptPubKeyMan 2020-03-08 12:26:32 -04:00
fanquake
4d80274b99
Merge #18241: wallet/refactor: refer to CWallet immutably when possible
79facb11e9 wallet: use constant CWallets in rpcwallet.cpp (Karl-Johan Alm)
d9b0ebc1da wallet: make ReserveDestination pwallet ivar const (Karl-Johan Alm)
57c569e4d9 wallet: make BackupWallet() const (Karl-Johan Alm)
df3a818d2a wallet: make getters const (Karl-Johan Alm)
227b9dd2d6 wallet/spkm: make GetOldestKeyPoolTime() const (Karl-Johan Alm)
22d329ad0e wallet: use constant CWallets in rpcdump.cpp (Karl-Johan Alm)
7b3587b29d wallet/db: make IsDummy() const (Karl-Johan Alm)
d366795d18 wallet/db: make Backup() const (Karl-Johan Alm)
8cd0b86340 wallet: make CanGetAddresses() const (Karl-Johan Alm)
037fa770eb wallet: make KeypoolCountExternalKeys() const (Karl-Johan Alm)
ddc93557ad wallet: make CanGenerateKeys() const (Karl-Johan Alm)
dc2d0650fd make BlockUntilSyncedToCurrentChain() const (Karl-Johan Alm)

Pull request description:

  A lot of places refer to `CWallet*`'s as `CWallet * const`, which translates to *"an immutable pointer to a mutable `CWallet` instance"*; this is

  1. often not what the author meant, especially as a lot of these places do not at all modify the wallet object, and
  2. confusing, as it tends to suggest that this is a proper way to refer to a constant `CWallet` instance.

  This PR changes references to wallets to `const CWallet* const` whenever immutability is expected. This should result in no behavioral changes at all, and improved compile-time error checking.

  Note from irc:

  > &lt;sipa&gt; sounds good to me; this is the sort of change that as long as it compiles, the behavior shouldn't change
  > &lt;sipa&gt; though in general it may lead to introducing automatic copying of objects sometimes (e.g. trying to std::move a const object will work, but generally result in a copy rather than an efficient move)
  > &lt;sipa&gt; CWallet objects aren't copied or moved though

ACKs for top commit:
  laanwj:
    ACK 79facb11e9
  Empact:
    ACK 79facb11e9
  promag:
    ACK 79facb11e9.
  fjahr:
    ACK 79facb11e9

Tree-SHA512: 80a80c1a52f0f788d0ccb268b53bc0f46c796643a3c5a22b55bbbde4ffa6c7e347784e5e53b1e488a3b4e14399e31d5be9417ad5b6319c74a462609e9b1a98e8
2020-03-07 07:24:54 +08:00