Commit graph

1466 commits

Author SHA1 Message Date
practicalswift
d855e4cac8 Avoid triggering undefined behaviour (std::memset(nullptr, 0, 0)) if an invalid string is passed to DecodeSecret(...) 2019-02-07 22:30:25 +01:00
MeshCollider
1933e38c1a
Merge #14667: Add deriveaddresses RPC util method
595283851 [rpc] util: add deriveaddresses method (Sjors Provoost)

Pull request description:

  Usage:

  ```sh
  bitcoin-cli deriveaddresses "wpkh([d34db33f/84h/0h/0h]xpub6DJ2dNUysrn5Vt36jH2KLBT2i1auw1tTSSomg8PhqNiUtx8QX2SvC9nrHu81fT41fvDUnhMjEzQgXnQjKEu3oaqMSzhSrHMxyyoEAmUHQbY/0/0)"
  [
    "bc1qg6ucjz7kgdedam7v5yarecy54uqw82yym06z3q"
  ] // part of the BIP32 test vector
  ```

  Avoids the need for external (BIP32) libraries to derive an address. Can be used in conjunction with `scantxoutset` as a poor mans wallet. Might be useful to test more complicated future descriptors.

  ~To keep it as simple as possible it only supports descriptors that result in a single address, so no `combo()` and ranges.~

  As discussed recently on IRC it might make sense to put this in a separate utility along with other descriptor and psbt utility functions which don't need a chain or wallet context. However I prefer to leave that to another PR.

Tree-SHA512: b8e53db11a8fd87638cc98766270cc3be9adc4b3e5085798a6a4e2e6ad252bf6d2189346bbb2da72d04d13f7f1e80b5cb88e8039653bea1f150602a876ef7f34
2019-02-08 08:21:52 +13:00
João Barbosa
6440e61375 qa: Drop RPC connection if --usecli 2019-02-06 00:04:28 +00:00
MarcoFalke
5029e94f85
Merge #14519: tests: add utility to easily profile node performance with perf
13782b8ba8 docs: add perf section to developer docs (James O'Beirne)
58180b5fd4 tests: add utility to easily profile node performance with perf (James O'Beirne)

Pull request description:

  Adds a context manager to easily (and selectively) profile node performance during functional test execution using `perf`.

  While writing some tests, I encountered some odd bitcoind slowness. I wrote up a utility (`TestNode.profile_with_perf`) that generates performance diagnostics for a node by running `perf` during the execution of a particular region of test code.

  `perf` usage is detailed in the excellent (and sadly unmerged) https://github.com/bitcoin/bitcoin/pull/12649; all due props to @eklitzke.

  ### Example

  ```python
  with node.profile_with_perf("large-msgs"):
      for i in range(200):
          node.p2p.send_message(some_large_msg)
      node.p2p.sync_with_ping()
  ```

  This generates a perf data file in the test node's datadir (`/tmp/testtxmpod0y/node0/node-0-TestName-large-msgs.perf.data`).

  Running `perf report` generates nice output about where the node spent most of its time while running that part of the test:

  ```bash
  $ perf report -i /tmp/testtxmpod0y/node0/node-0-TestName-large-msgs.perf.data --stdio \
    | c++filt \
    | less

  # To display the perf.data header info, please use --header/--header-only options.
  #
  #
  # Total Lost Samples: 0
  #
  # Samples: 135  of event 'cycles:pp'
  # Event count (approx.): 1458205679493582
  #
  # Children      Self  Command          Shared Object        Symbol
  # ........  ........  ...............  ...................  ........................................................................................................................................................................................................................................................................
  #
      70.14%     0.00%  bitcoin-net      bitcoind             [.] CNode::ReceiveMsgBytes(char const*, unsigned int, bool&)
                  |
                  ---CNode::ReceiveMsgBytes(char const*, unsigned int, bool&)

      70.14%     0.00%  bitcoin-net      bitcoind             [.] CNetMessage::readData(char const*, unsigned int)
                  |
                  ---CNetMessage::readData(char const*, unsigned int)
                     CNode::ReceiveMsgBytes(char const*, unsigned int, bool&)

      35.52%     0.00%  bitcoin-net      bitcoind             [.] std::vector<char, zero_after_free_allocator<char> >::_M_fill_insert(__gnu_cxx::__normal_iterator<char*, std::vector<char, zero_after_free_allocator<char> > >, unsigned long, char const&)
                  |
                  ---std::vector<char, zero_after_free_allocator<char> >::_M_fill_insert(__gnu_cxx::__normal_iterator<char*, std::vector<char, zero_after_free_allocator<char> > >, unsigned long, char const&)
                     CNetMessage::readData(char const*, unsigned int)
                     CNode::ReceiveMsgBytes(char const*, unsigned int, bool&)

  ...
  ```

Tree-SHA512: 9ac4ceaa88818d5eca00994e8e3c8ad42ae019550d6583972a0a4f7b0c4f61032e3d0c476b4ae58756bc5eb8f8015a19a7fc26c095bd588f31d49a37ed0c6b3e
2019-02-05 17:40:16 -05:00
João Barbosa
d3bf3b930d qa: Test .walletlock file is closed 2019-02-04 18:50:21 +00:00
MarcoFalke
fac3a054cb
test: Fix race in p2p_invalid_messages 2019-02-02 17:45:20 -05:00
MarcoFalke
5c99bb0047
Merge #15247: qa: Use wallet to retrieve raw transactions
fa5278a419 qa: Use wallet to retrieve raw transactions (MarcoFalke)
fa2198328e qa: Style-only fixes in touched files (MarcoFalke)

Pull request description:

  Instead of asking the coin database and block storage about a transaction, pull it directly from the wallet in wallet related tests.

  This refactoring only makes sense in light of #15159.

  <sub>This product may contain minor stylistic cleanups

Tree-SHA512: ec34c7150d873da9f19fead3f7e3f758baba5ef10061942384c470a47a6f320690109be9c5160f0c8bc228272a729653d44c78471455337318f657d6c164ba23
2019-02-01 09:35:14 -05:00
Wladimir J. van der Laan
3e38d40873
Merge #15235: Do not import private keys to wallets with private keys disabled
e6c58d3b01 Do not import private keys to wallets with private keys disabled (Andrew Chow)
b5c5021b64 Refactor importwallet to extract data from the file and then import (Andrew Chow)
1f77f6754c tests: unify RPC argument to cli argument conversion and handle dicts and lists (Andrew Chow)

Pull request description:

  Fixes a bug where private keys could be imported to wallets with private keys disabled. Now every RPC which can import private keys checks for whether the wallet has private keys are disabled and errors if it is. Also added an belt-and-suspenders check to `AddKeyPubkeyWithDB` to have it assert that the wallet has private keys enabled.

Tree-SHA512: 5cd04febce9aa2bd9bfd02f312c6ff8705e37278cae59efd3895f6d6e2f1b477aefd297e2dd0860791bdd3d4f3cad8eb1a404f8f3d4e2035b91314ad2c1028ae
2019-02-01 14:01:32 +01:00
Andrew Chow
e6c58d3b01 Do not import private keys to wallets with private keys disabled 2019-01-31 14:29:28 -05:00
Andrew Chow
2e023419c5 tests: unify RPC argument to cli argument conversion and handle dicts and lists
When running tests with --usecli, unify the conversion from argument objects to
strings using a new function arg_to_cli(). This fixes boolean arguments when
using named arguments.

Also use json.dumps() to get the string values for arguments that are dicts and
lists so that bitcoind's JSON parser does not become confused.
2019-01-31 12:37:33 -05:00
MarcoFalke
252fd15add
Merge #13926: [Tools] bitcoin-wallet - a tool for creating and managing wallets offline
3c3e31c3a4 [tests] Add wallet-tool test (João Barbosa)
49d2374acf [tools] Add wallet inspection and modification tool (Jonas Schnelli)

Pull request description:

  Adds an offline tool `bitcoin-wallet-tool` for wallet creation and maintenance.

  Currently this tool can create a new wallet file, display information on an existing wallet, and run the salvage and zapwallettxes maintenance tasks on an existing wallet. It can later be extended to support other common wallet maintenance tasks.

  Doing wallet maintenance tasks in an offline tool makes much more sense (and is potentially safer) than having to spin up a full node.

Tree-SHA512: 75a28b8a58858d9d76c7532db40eacdefc5714ea5aab536fb1dc9756e2f7d750d69d68d59c50a68e633ce38fb5b8c3e3d4880db30fe01561e07ce58d42bceb2b
2019-01-31 11:07:51 -05:00
Wladimir J. van der Laan
4d661baf1a
Merge #15244: gdb attaching to process during tests has non-sudo solution
f96dbd1bbe gdb attaching to process during tests has non-sudo solution (Gregory Sanders)

Pull request description:

  There are some security considerations, so a link is attached.

Tree-SHA512: 67dd9c4b26b1e6d8e9a9fe766d309c0af69b752f6f544f3dce4bdcc95ae85feb9a49ac600c3f70d100629505d2340ab43932ded53b1485f80b97981e6df6a527
2019-01-31 15:29:35 +01:00
Wladimir J. van der Laan
36aeb43c01
Merge #15246: qa: Add tests for invalid message headers
fa3745bda8 qa: Add tests for invalid message headers (MarcoFalke)

Pull request description:

Tree-SHA512: b37e297cfd65a33a7af201f750a303cf437b438e40d38b1d2f562ccde67082616daa110ca1e5e3af6514ea4ca4b115362acf2ffa6263cea3c8e8189ce02dda67
2019-01-31 14:25:33 +01:00
Gregory Sanders
f96dbd1bbe gdb attaching to process during tests has non-sudo solution 2019-01-31 12:25:04 +00:00
João Barbosa
3c3e31c3a4 [tests] Add wallet-tool test
Original tests by João Barbosa <joao.paulo.barbosa@gmail.com>

Additional contribution by John Newbery <john@johnnewbery.com>
2019-01-30 16:26:56 -05:00
Wladimir J. van der Laan
77339e5c24
Merge #15163: Correct units for "-dbcache" and "-prune"
6f6514a080 Correct units for "-dbcache" and "-prune" (Hennadii Stepanov)

Pull request description:

  Actually, all `dbcache`-related values in the code are measured in MiB (not in megabytes, MB) or in bytes (e.g., `nTotalCache`).

  See: https://github.com/bitcoin/bitcoin/blob/master/src/txdb.h

  ba8c8b2227/src/init.cpp (L1405-L1424)

  Also, "-prune" is fixed:
  1. The GUI values in GB are translated to the node values in MiB correctly.
  2. The maximum of the "prune" `QSpinBox` is not limited by default value of 99 (GB).

  Fix: #15106

Tree-SHA512: 151ec43b31b1074db8b345fedb1dcc10bde225899a5296bfc183f57e1553d13ac27db8db100226646769ad03c9fcab29d88763065a471757c6c41ac51108459d
2019-01-30 20:22:57 +01:00
MarcoFalke
a47319dada
Merge #15159: [RPC] Remove lookup to UTXO set from GetTransaction
04da9f4834 [RPC] Update getrawtransaction interface (Amiti Uttarwar)

Pull request description:

  - stop checking unspent UTXOs for a transaction when txindex is not enabled, as per conversation here: https://github.com/bitcoin/bitcoin/issues/3220#issuecomment-377458383
  - code contributed by sipa

Tree-SHA512: aa07353bccc14b81b7803992a25d076d6bc06d15ec7c1b85828dc10aea7e0498d9b49f71783e352ab8a14b0bb2010cfb7835de3dfd1bc6f2323f460449348e66
2019-01-30 11:18:44 -05:00
Hennadii Stepanov
6f6514a080
Correct units for "-dbcache" and "-prune"
All dbcache-related values in the code are measured in MiB (not in
megabytes, MB) or in bytes.
The GUI "-prune" values in GB are translated to the node values in MiB
correctly. The maximum of the "-prune" QSpinBox is not limited by the
default value of 99 (GB).
Also, this improves log readability.
2019-01-30 07:17:22 +02:00
Sjors Provoost
595283851d
[rpc] util: add deriveaddresses method 2019-01-29 18:14:23 +01:00
MarcoFalke
fa5278a419
qa: Use wallet to retrieve raw transactions 2019-01-26 22:43:56 -05:00
Amiti Uttarwar
04da9f4834 [RPC] Update getrawtransaction interface 2019-01-26 18:36:53 -08:00
MarcoFalke
fa2198328e
qa: Style-only fixes in touched files 2019-01-25 11:29:10 -05:00
Ben Woosley
f618c58b75
Docs: Update python docs to reflect that wildcard imports are disallowed 2019-01-24 16:57:41 -08:00
MarcoFalke
fa3745bda8
qa: Add tests for invalid message headers 2019-01-24 17:08:22 -05:00
Andrew Chow
1f77f6754c tests: unify RPC argument to cli argument conversion and handle dicts and lists
When running tests with --usecli, unify the conversion from argument objects to
strings using a new function arg_to_cli(). This fixes boolean arguments when
using named arguments.

Also use json.dumps() to get the string values for arguments that are dicts and
lists so that bitcoind's JSON parser does not become confused.
2019-01-24 14:07:09 -05:00
Wladimir J. van der Laan
72bd4ab867
Merge #15193: Default -whitelistforcerelay to off
a36d97d866 Default -whitelistforcerelay to off (Suhas Daftuar)

Pull request description:

  No one seems to use this "feature", and at any rate the behavior of relaying transactions when they violate local policy is error-prone, if we ever consider changing the ban behavior of our software from one version to the next.

  Defaulting this to off means that users who use -whitelist won't be unexpectedly surprised by this interaction.  If anyone is still relying on this feature, it can still be explicitly turned on.

Tree-SHA512: 52650ad464a728d1648f496751e3f713077ea3a1de7278ed03531b2e8723e63cf2f6f41b56c98c0f73ffa22c36e01d9170b409ab452c737aca35b7ecd7a6b448
2019-01-24 15:25:17 +01:00
Jonas Schnelli
73a6bac9ff
Merge #15196: [test]: Update all subprocess.check_output functions to be Python 3.4 compatible
fdf82ba18 Update all subprocess.check_output functions in CI scripts to be Python 3.4 compatible (Graham Krizek)

Pull request description:

  CI is failing the `lint` stage on every Cron run (regular PR/Push runs still pass). The failure was introduced in 74ce326 and has been broken since. The Python version running in CI was downgraded to 3.4 from 3.6. There were a couple files that were using the `encoding` argument in the `subprocess.check_output` function. This was introduced in Python 3.6 and therefore broke the scripts that were using it. The `universal_newlines` argument was used as well, but in order to use it we must be able to set encoding because of issues on some BSD systems.

  To get CI to pass, I removed all `universal_newline` and `encoding` args to the `check_ouput` function. Then I decoded all `check_output` return values. This should keep the same behavior but be Python 3.4 compatible.

Tree-SHA512: f5e5885e98cf4777be9cc254446a873eedb03bdccbd8e06772a964db95e9fcf46736aa9cdcab1d8f123ea9f4947ed6020679898d8b2f47ffb1d94c21a4b08209
2019-01-23 20:43:53 -10:00
Jonas Schnelli
82cf6813a4
Merge #14353: REST: add blockhash call, fetch blockhash by height
42ff30ec6 [Docs] add short documentation for /rest/blockhashbyheight (Jonas Schnelli)
579d418f7 [QA] add rest tests for /rest/blockhashbyheight/<HEIGHT>.<FORMAT> (Jonas Schnelli)
eb9ef04c4 REST: add "blockhashbyheight" call, fetch blockhash by height (Jonas Schnelli)

Pull request description:

  Completes the REST interface for trivial block exploring by adding a call that allows to fetch the blockhash in the main chain by a given height.

Tree-SHA512: 94be9e56718f857279b11cc16dfa8d04f3b5a762e87ae54281b4d87247c71c844895f4944d5a47f09056bf851f4c4761ac4fbdbaaee957265d14de5c1c73e8d2
2019-01-22 19:59:02 -10:00
Suhas Daftuar
a36d97d866 Default -whitelistforcerelay to off 2019-01-22 12:18:45 -05:00
James O'Beirne
58180b5fd4 tests: add utility to easily profile node performance with perf
Introduces `TestNode.profile_with_perf()` context manager which
samples node execution to produce profiling data.

Also introduces a test framework flag, `--perf`, which will run
perf on all nodes for the duration of a given test.
2019-01-22 08:55:55 -05:00
Jonas Schnelli
579d418f74
[QA] add rest tests for /rest/blockhashbyheight/<HEIGHT>.<FORMAT> 2019-01-21 11:54:54 -10:00
Wladimir J. van der Laan
9bad1e0b22
Merge #15219: lint: Enable python linters via an array
948d8f4f10 lint: Enable python linters via an array (Ben Woosley)

Pull request description:

  This assures consistent recording of the enabled linters.

  This applies the same fix as #15170 to lint-python.sh

Tree-SHA512: 6d03f919e86e7c2465475c88b25dd84391282bcc11728078024daf0432a7dccddf9e4a2cdae35d6ef374971cb4e12f0fa21b58f757e25f2fe7c12ceb4f4b2c57
2019-01-21 20:52:07 +01:00
Wladimir J. van der Laan
72506ed349
Merge #15177: rest: Improve tests and documention of /headers and /block
7cf994d5cf qa: Improve tests of /rest/headers and /rest/block (João Barbosa)
0825b86b28 doc: /rest/block responds with 404 if block does not exist (João Barbosa)
be625f7c55 doc: Explain empty result of /rest/headers (João Barbosa)

Pull request description:

  Follow up of #15107.

Tree-SHA512: a7fdeed05216e3eda9604664db529237c2d0ddf422cfac139d6345a22b6e00bfe870d4e3f177423db7d4efb295ac2dc0ca2eb20c9c27c0719b89fd5428860d03
2019-01-21 17:37:55 +01:00
Ben Woosley
948d8f4f10
lint: Enable python linters via an array
This assures consistent recording of the enabled linters.
2019-01-20 17:13:22 -08:00
Graham Krizek
fdf82ba181
Update all subprocess.check_output functions in CI scripts to be Python 3.4 compatible
Removing the 'universal_newlines' and 'encoding' args from the subprocess.check_outputs fuction. 'universal_newlines' is supported in 3.4, but 'encoding' is not. Without specifying 'encoding' it will make a guess at encoding, which can break things on BSD systems. We must handle encoding/decoding ourselves until we can use Python 3.6
2019-01-18 09:36:39 -06:00
practicalswift
a517541794 Remove no longer needed shellcheck suppressions 2019-01-16 15:47:56 +01:00
practicalswift
0b7196ecad Fix warnings introduced in shellcheck v0.6.0 2019-01-16 15:47:56 +01:00
practicalswift
07a53dce9f Remove repeated suppression. Fix indentation. 2019-01-16 15:47:56 +01:00
João Barbosa
7cf994d5cf qa: Improve tests of /rest/headers and /rest/block 2019-01-16 14:46:09 +00:00
Wladimir J. van der Laan
64ee94356f
Merge #14409: utils and libraries: Make 'blocksdir' always net specific
e4a0c3547e Improve blocksdir functional test. (Hennadii Stepanov)
c3f1821ac7 Make blockdir always net specific (Hennadii Stepanov)

Pull request description:

  The blocks directory is net specific by definition.

  Also this prevents the side effect of calling `GetBlocksDir(false)` in the non-mainnet environment.
  Currently a new node creates an unused `blocks\` directory in the root of the data directory when `-testnet` or `-regtest` is specified.

  Refs:
  - #12653
  - https://github.com/bitcoin/bitcoin/pull/12653#discussion_r174784834 by @laanwj
  - https://github.com/bitcoin/bitcoin/issues/14595#issuecomment-436011186

Tree-SHA512: c9957a68a4a200ebd2010823a56db7e61563afedcb7c9828e86b13f3af2990e07854b622c1f3374756f94574acb3ea32de7d2a399eef6c0623f0e11265155627
2019-01-16 13:40:27 +01:00
Wladimir J. van der Laan
3ae3748ce1
Merge #14958: qa: Remove race between connecting and shutdown on separate connections
4412a59bfe qa: Remove race between connecting and shutdown on separate connections (João Barbosa)

Pull request description:

  Fixes the error https://github.com/bitcoin/bitcoin/pull/14670#issuecomment-447255352 reported by @ken2812221.

  There is a race between RPC stop and another concurrent call in the test framework. The connection must be established and the command `waitfornewblock` running before calling `stop`.

  See also https://github.com/bitcoin/bitcoin/pull/14670#issuecomment-447304513.

Tree-SHA512: 77feb8628d3b9c025ec0cf83565d4d6680cad4fb182fc93a65df8b573f3e799ba4c44e06d9001dd8a375ca0b1ee17f10e66c3902b6256d0ae2acbc64539185d7
2019-01-16 13:05:32 +01:00
João Barbosa
4412a59bfe qa: Remove race between connecting and shutdown on separate connections 2019-01-16 12:01:42 +00:00
Wladimir J. van der Laan
16c4a5373b
Merge #15170: refactor/lint: Add ignored shellcheck suggestions to an array
cbd9091ed5 refactor/lint: Add ignored suggestions to an array (Vidar Holen)

Pull request description:

  By adding excluded shellcheck suggestions to an array, you can avoid the current duplication
  between command and comments. This ensures that they never go out of sync, makes it easier to
  add new ones, and improves the readability of related diffs.

Tree-SHA512: 04afced1d27fda940cc5e61d7f9ed04507c8f7f7dfd0031c09898a599c6de93695923a80cb3d515a0f0bf728847592d8680c15ac2e376b48726c03ca744f13a5
2019-01-16 12:03:34 +01:00
Sjors Provoost
04215eb328
[doc] explain what .python-version does 2019-01-15 19:58:11 +01:00
Vidar Holen
cbd9091ed5 refactor/lint: Add ignored suggestions to an array
This avoids duplicating the codes between command and comments.
2019-01-14 18:58:57 -08:00
Wladimir J. van der Laan
cf0c67b62c
Merge #14982: rpc: Add getrpcinfo command
a0ac15459a doc: Add getrpcinfo release notes (João Barbosa)
251a91c1bf qa: Add tests for getrpcinfo (João Barbosa)
d0730f5ce4 rpc: Add getrpcinfo command (João Barbosa)
068a8fc05f rpc: Track active commands (João Barbosa)
bf4383277d rpc: Remove unused PreCommand signal (João Barbosa)

Pull request description:

  The new `getrpcinfo` command exposes details of the RPC interface. The details can be configuration properties or runtime values/stats.

  This can be particular useful to coordinate concurrent functional tests (see #14958 from where this was extracted).

Tree-SHA512: 7292cb6087f4c429973d991aa2b53ffa1327d5a213df7d6ba5fc69b01b2e1a411f6d1609fed9234896293317dab05f65064da48b8f2b4a998eba532591d31882
2019-01-14 18:07:15 +01:00
João Barbosa
f652f85d0c qa: Ignore shellcheck warning SC2236
With shellcheck 0.6.0 the warning `SC2236 -  Use -n instead of ! -z` is raised.
This change adds that warning to the ignored list.
2019-01-14 15:21:47 +00:00
Wladimir J. van der Laan
cebe910718
Merge #15039: wallet: Avoid leaking nLockTime fingerprint when anti-fee-sniping
fa48baf23e wallet: Avoid leaking locktime fingerprint when anti-fee-sniping (MarcoFalke)
453803adc9 [test] wallet_txn_clone: Correctly clone txin sequence (MarcoFalke)

Pull request description:

  The wallet sets the locktime to the current height of our active chain. This is fine, as long as our node is connected to other nodes. However, when we fall back and get stuck at a particular height (e.g. taking the wallet offline), the same (potentially unique) locktime is used for all transactions. This makes it easier for passive observers to cluster transactions by wallet.

  For reference, I visualized "locktime-reuse" with the data:
  * blocks 545k-555k (both inclusive)
  * locktimes<=60k
  * excluding coinbase txs

  ![distribution of height-based tx locktimes used at least twice](https://user-images.githubusercontent.com/6399679/50446163-b8256d80-0913-11e9-9832-40b76052b2b9.png)

Tree-SHA512: 2af259dd8f9f863312e2732d80ca8ba6a20c8d6d1c486b10a48479e1c85ccf13b0c38723740ebadde0f28d321cd9c133ad3e5d1e925472eb27681143bda2d0e7
2019-01-10 15:56:54 +01:00
MarcoFalke
5da08e0ac5
Merge #15127: docs: Clarifying testing instructions
ef5ebc6d8f docs: Clarifying testing instructions (benthecarman)

Pull request description:

  This statement confused me on my first time reading through.  Hopefully, this addition will help someone else on their first time.

Tree-SHA512: 17f421275adb7586eca954910269d29fcd3bacc42fab4bc2e01110f9e13ca6f8c1ca178246f7192e1131f14ced7f7dc0b57e7aec324898807c1813a2ebc513de
2019-01-09 17:23:51 -05:00
MarcoFalke
1cfbb16b5d
Merge #15108: [tests] tidy up wallet_importmulti.py
2d5f1ea2e3 [tests] move wallet util functions to wallet_util.py (John Newbery)
6be64ef02c [tests] tidy up wallet_importmulti.py (John Newbery)

Pull request description:

  Cherry picks un-merged commits from #14952, which "fixes review comments from @ryanofsky here: https://github.com/bitcoin/bitcoin/pull/14886#pullrequestreview-183772779"

Tree-SHA512: 5f389196b0140d013a533d500f1812786a3a5cfb65980e13eaeacc459fddb55f43d05da3ab5e7cc8c997f26c0b667eed081ab6de2d125e631c70a7dd4c06e350
2019-01-09 16:58:46 -05:00