5b57dc5458 RPC: getpeerinfo: Wrap long help line for bytesrecv_per_msg (Luke Dashjr)
d681a28219 RPC: getpeerinfo: Deprecate "whitelisted" field (replaced by "permissions") (Luke Dashjr)
Pull request description:
If we were going to continue support for "whitelisted", we should have probably made it true if any permission flag was set, rather than only if "default permissions" were used.
This corrects the description, and deprecates it.
ACKs for top commit:
laanwj:
ACK 5b57dc5458
Tree-SHA512: a2e2137f8be8110357c1b2fef2c923fa8c7c4a49b0b2b3a2d78aedf12f8ed5cc7e140018a21b37e6ec7770ed4007542aeef7ad4558973901b107e8e0f81d6003
886be97af5 Ignore incorrectly-serialized banlist.dat entries (Pieter Wuille)
883cea7dea Restore compatibility with old CSubNet serialization (Pieter Wuille)
Pull request description:
#19628 changed CSubNet for IPv4 netmasks, using the first 4 bytes of `netmask` rather than the last 4 to store the actual mask. Unfortunately, CSubNet objects are serialized on disk in banlist.dat, breaking compatibility with existing banlists (and bringing them into an inconsistent state where entries reported in `listbanned` cannot be removed).
Fix this by reverting to the old format (just for serialization). Also add a sanity check to the deserializer so that nonsensical banlist.dat entries are ignored (which would otherwise be possible if someone added IPv4 entries after #19628 but without this PR).
Reported by Greg Maxwell.
ACKs for top commit:
laanwj:
Code review ACK 886be97af5
vasild:
ACK 886be97af
Tree-SHA512: d3fb91e8ecd933406e527187974f22770374ee2e12a233e7870363f52ecda471fb0b7bae72420e8ff6b6b1594e3037a5115984c023dbadf38f86aeaffcd681e7
27fc6a38f8 DecodeHexTx: Break out transaction decoding logic into own function (Gregory Sanders)
6020ce3c01 DecodeHexTx: Try case where txn has inputs first (Gregory Sanders)
Pull request description:
Alternative/complementary to https://github.com/bitcoin/bitcoin/pull/17773 to avoid random `decoderawtransaction` failures. Most cases this is used now is on complete transactions, especially with the uptake of PSBT.
ACKs for top commit:
ajtowns:
ACK 27fc6a38f8
achow101:
ACK 27fc6a38f8
Tree-SHA512: 0a836d7c9951bf7d2764507788dbcc871d520f1ea9b77d6b22f051f4d6224ed779aba0e4f28c5c165040095ee0c70b67080c39164d82de61b19158f7ae6fddb2
0e2a5e448f tests: dumping and minimizing of script assets data (Pieter Wuille)
4567ba034c tests: add generic qa-asset-based script verification unit test (Pieter Wuille)
f06e6d0345 tests: functional tests for Schnorr/Taproot/Tapscript (Pieter Wuille)
3c226639eb tests: add BIP340 Schnorr signature support to test framework (Pieter Wuille)
206fb180ec --- [TAPROOT] Tests --- (Pieter Wuille)
d7ff237f29 Activate Taproot/Tapscript on regtest (BIP 341, BIP 342) (Pieter Wuille)
e9a021d7e6 Make Taproot spends standard + policy limits (Pieter Wuille)
865d2c37e2 --- [TAPROOT] Regtest activation and policy --- (Pieter Wuille)
72422ce396 Implement Tapscript script validation rules (BIP 342) (Johnson Lau)
330de894a9 Use ScriptExecutionData to pass through annex hash (Pieter Wuille)
8bbed4b7ac Implement Taproot validation (BIP 341) (Pieter Wuille)
0664f5fe1f Support for Schnorr signatures and integration in SignatureCheckers (BIP 340) (Pieter Wuille)
5de246ca81 Implement Taproot signature hashing (BIP 341) (Johnson Lau)
9eb590894f Add TaggedHash function (BIP 340) (Pieter Wuille)
450d2b2371 --- [TAPROOT] BIP340/341/342 consensus rules --- (Pieter Wuille)
5d62e3a68b refactor: keep spent outputs in PrecomputedTransactionData (Pieter Wuille)
8bd2b4e784 refactor: rename scriptPubKey in VerifyWitnessProgram to exec_script (Pieter Wuille)
107b57df9f scripted-diff: put ECDSA in name of signature functions (Pieter Wuille)
f8c099e220 --- [TAPROOT] Refactors --- (Pieter Wuille)
Pull request description:
This is an implementation of the Schnorr/taproot consensus rules proposed by BIPs [340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki), [341](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki), and [342](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki).
See the list of commits [below](https://github.com/bitcoin/bitcoin/pull/19953#issuecomment-691815830). No signing or wallet support of any kind is included, as testing is done entirely through the Python test framework.
This is a successor to https://github.com/bitcoin/bitcoin/pull/17977 (see discussion following [this comment](https://github.com/bitcoin/bitcoin/pull/17977#issuecomment-682285983)), and will have further changes squashed/rebased. The history of this PR can be found in #19997.
ACKs for top commit:
instagibbs:
reACK 0e2a5e448f
benthecarman:
reACK 0e2a5e4
kallewoof:
reACK 0e2a5e448f
jonasnick:
ACK 0e2a5e448f almost only looked at bip340/libsecp related code
jonatack:
ACK 0e2a5e448f modulo the last four commits (tests) that I plan to finish reviewing tomorrow
fjahr:
reACK 0e2a5e448f
achow101:
ACK 0e2a5e448f
Tree-SHA512: 1b00314450a2938a22bccbb4e177230cf08bd365d72055f9d526891f334b364c997e260c10bc19ca78440b6767712c9feea7faad9a1045dd51a5b96f7ca8146e
c4a29d0a90 Update wallet_multiwallet.py for descriptor and sqlite wallets (Russell Yanofsky)
310b0fde04 Run dumpwallet for legacy wallets only in wallet_backup.py (Andrew Chow)
6c6639ac9f Include sqlite3 in documentation (Andrew Chow)
f023b7cac0 wallet: Enforce sqlite serialized threading mode (Andrew Chow)
6173269866 Set and check the sqlite user version (Andrew Chow)
9d3d2d263c Use network magic as sqlite wallet application ID (Andrew Chow)
9af5de3798 Use SQLite for descriptor wallets (Andrew Chow)
9b78f3ce8e walletutil: Wallets can also be sqlite (Andrew Chow)
ac38a87225 Determine wallet file type based on file magic (Andrew Chow)
6045f77003 Implement SQLiteDatabase::MakeBatch (Andrew Chow)
727e6b2a4e Implement SQLiteDatabase::Verify (Andrew Chow)
b4df8fdb19 Implement SQLiteDatabase::Rewrite (Andrew Chow)
010e365906 Implement SQLiteDatabase::TxnBegin, TxnCommit, and TxnAbort (Andrew Chow)
ac5c1617e7 Implement SQLiteDatabase::Backup (Andrew Chow)
f6f9cd6a64 Implement SQLiteBatch::StartCursor, ReadAtCursor, and CloseCursor (Andrew Chow)
bf90e033f4 Implement SQLiteBatch::ReadKey, WriteKey, EraseKey, and HasKey (Andrew Chow)
7aa45620e2 Add SetupSQLStatements (Andrew Chow)
6636a2608a Implement SQLiteBatch::Close (Andrew Chow)
93825352a3 Implement SQLiteDatabase::Close (Andrew Chow)
a0de83372b Implement SQLiteDatabase::Open (Andrew Chow)
3bfa0fe125 Initialize and Shutdown sqlite3 globals (Andrew Chow)
5a488b3d77 Constructors, destructors, and relevant private fields for SQLiteDatabase/Batch (Andrew Chow)
ca8b7e04ab Implement SQLiteDatabaseVersion (Andrew Chow)
7577b6e1c8 Add SQLiteDatabase and SQLiteBatch dummy classes (Andrew Chow)
e87df82580 Add sqlite to travis and depends (Andrew Chow)
54729f3f4e Add libsqlite3 (Andrew Chow)
Pull request description:
This PR adds a new class `SQLiteDatabase` which is a subclass of `WalletDatabase`. This provides access to a SQLite database that is used to store the wallet records. To keep compatibility with BDB and to complexity of the change down, we don't make use of many SQLite's features. We use it strictly as a key-value store. We create a table `main` which has two columns, `key` and `value` both with the type `blob`.
For new descriptor wallets, we will create a `SQLiteDatabase` instead of a `BerkeleyDatabase`. There is no requirement that all SQLite wallets are descriptor wallets, nor is there a requirement that all descriptor wallets be SQLite wallets. This allows for existing descriptor wallets to work as well as keeping open the option to migrate existing wallets to SQLite.
We keep the name `wallet.dat` for SQLite wallets. We are able to determine which database type to use by searching for specific magic bytes in the `wallet.dat` file. SQLite begins it's files with a null terminated string `SQLite format 3`. BDB has `0x00053162` at byte 12 (note that the byte order of this integer depends on the system endianness). So when we see that there is a `wallet.dat` file that we want to open, we check for the magic bytes to determine which database system to use.
I decided to keep the `wallet.dat` naming to keep things like backup script to continue to function as they won't need to be modified to look for a different file name. It also simplifies a couple of things in the implementation and the tests as `wallet.dat` is something that is specifically being looked for. If we don't want this behavior, then I do have another branch which creates `wallet.sqlite` files instead, but I find that this direction is easier.
ACKs for top commit:
Sjors:
re-utACK c4a29d0a90
promag:
Tested ACK c4a29d0a90.
fjahr:
reACK c4a29d0a90
S3RK:
Re-review ACK c4a29d0a90
meshcollider:
re-utACK c4a29d0a90
hebasto:
re-ACK c4a29d0a90, only rebased since my [previous](https://github.com/bitcoin/bitcoin/pull/19077#pullrequestreview-507743699) review, verified with `git range-diff master d18892dcc c4a29d0a9`.
ryanofsky:
Code review ACK c4a29d0a90. I am honestly confused about reasons for locking into `wallet.dat` again when it's so easy now to use a clean format. I assume I'm just very dense, or there's some unstated reason, because the only thing that's been brought up are unrealistic compatibility scenarios (all require actively creating a wallet with non-default descriptor+sqlite option, then trying to using the descriptor+sqlite wallets with old software or scripts and ignoring the results) that we didn't pay attention to with previous PRs like #11687, which did not require any active interfaction.
jonatack:
ACK c4a29d0a90, debug builds and test runs after rebase to latest master @ c2c4dbaebd, some manual testing creating, using, unloading and reloading a few different new sqlite descriptor wallets over several node restarts/shutdowns.
Tree-SHA512: 19145732e5001484947352d3175a660b5102bc6e833f227a55bd41b9b2f4d92737bbed7cead64b75b509decf9e1408cd81c185ab1fb4b90561aee427c4f9751c
52380bf304 Squashed 'src/secp256k1/' changes from 8ab24e8dad..c6b6b8f1bb (Pieter Wuille)
Pull request description:
This updates the libsecp256k1 subtree to the latest master, which includes:
* Enabling the GLV endomorphism optimization by default (and removing support for the non-GLV EC multiplication)
* Added a proof for the correctness of the lambda split algorithm by roconnor-blockstream (other code was relying on the fact that it always outputs 128 bit results, which isn't at all obvious).
* Improved exhaustive tests, in particular for the Schnorr signature module
* Various other testing and CI improvements
ACKs for top commit:
fanquake:
ACK 9e5626d2a8 - performed a squash and checked that the changes were the same. The non-endomorphism code has now been ripped out.
benthecarman:
ACK 9e5626d
Tree-SHA512: 50fda5f3f934ee525f01cfc15e4f5efbc5261a97f2b77fe1b3453ee0edcf1281ad74ab4532a2fe1fe907652dd47023beff8cf3d73bf34f65ac914a694b9e7110
fa1f6f237d net: Send post-verack handshake messages at most once (MarcoFalke)
Pull request description:
There is no need to send `SENDHEADERS` and `SENDCMPCT` messages as a reply to each `VERACK` that is received. For alive checks, a `PING`/`PONG` can be used.
ACKs for top commit:
jonatack:
Concept ACK fa1f6f237d this is the only code section that sets `fCurrentlyConnected` and `fSuccessfullyConnected` to true. Could add a test. I did not verify if this code is actually being called repeatedly post initial verack; was it?
hebasto:
ACK fa1f6f237d, I have reviewed the code and it looks OK, I agree it can be merged.
naumenkogs:
ACK fa1f6f237d
laanwj:
Code review ACK fa1f6f237d
Tree-SHA512: c841d5d3807254a49463bbcfac3b32881b34a9d3206899544c86322c20988e17ad2ae243cba227fd3825a914f0cb2584451edda2414aecee6d5e3f5a0636f08a
c6b6b8f1bb Merge #830: Rip out non-endomorphism code + dependencies
c582abade1 Consistency improvements to the comments
63c6b71616 Reorder comments/function around scalar_split_lambda
2edc514c90 WNAF of lambda_split output has max size 129
4232e5b7da Rip out non-endomorphism code
ebad8414b0 Check correctness of lambda split without -DVERIFY
fe7fc1fda8 Make lambda constant accessible
9d2f2b44d8 Add tests to exercise lambda split near bounds
9aca2f7f07 Add secp256k1_split_lambda_verify
acab934d24 Detailed comments for secp256k1_scalar_split_lambda
76ed922a5f Increase precision of g1 and g2
6173839c90 Switch to our own memcmp function
63150ab4da Merge #827: Rename testrand functions to have test in name
c5257aed0b Merge #821: travis: Explicitly set --with-valgrind
bb1f54280f Merge #818: Add static assertion that uint32_t is unsigned int or wider
a45c1fa63c Rename testrand functions to have test in name
5006895bd6 Merge #808: Exhaustive test improvements + exhaustive schnorrsig tests
4eecb4d6ef travis: VALGRIND->RUN_VALGRIND to avoid confusion with WITH_VALGRIND
66a765c775 travis: Explicitly set --with-valgrind
d7838ba6a6 Merge #813: Enable configuring Valgrind support
7ceb0b7611 Merge #819: Enable -Wundef warning
8b7dcdd955 Add exhaustive test for extrakeys and schnorrsig
08d7d89299 Make pubkey parsing test whether points are in the correct subgroup
87af00b511 Abstract out challenge computation in schnorrsig
63e1b2aa7d Disable output buffering in tests_exhaustive.c
39f67dd072 Support splitting exhaustive tests across cores
e99b26fcd5 Give exhaustive_tests count and seed cmdline inputs
49e6630bca refactor: move RNG seeding to testrand
b110c106fa Change exhaustive test groups so they have a point with X=1
cec7b18a34 Select exhaustive lambda in function of order
78f6cdfaae Make the curve B constant a secp256k1_fe
d7f39ae4b6 Delete gej_is_valid_var: unused outside tests
8bcd78cd79 Make secp256k1_scalar_b32 detect overflow in scalar_low
c498366e5b Move exhaustive tests for recovery to module
be31791543 Make group order purely compile-time in exhaustive tests
e73ff30922 Enable -Wundef warning
c0041b5cfc Add static assertion that uint32_t is unsigned int or wider
4ad408faf3 Merge #782: Check if variable=yes instead of if var is set in travis.sh
412bf874d0 configure: Allow specifying --with[out]-valgrind explicitly
34debf7a6d Modify .travis.yml to explictly pass no in env vars instead of setting to nothing
a0e99fc121 Merge #814: tests: Initialize random group elements fully
5738e8622d tests: Initialize random group elements fully
c9939ba55d Merge #812: travis: run bench_schnorrsig
a51f2af62b travis: run bench_schnorrsig
ef37761fee Change travis.sh to check if variables are equal to yes instead of not-empty. Before this, setting `VALGRIND=wat` was considered as true, and to make it evaluate as false you had to unset the variable `VALGRIND=` but not it checks if `VALGRIND=yes` and if it's not `yes` then it's evaluated to false
git-subtree-dir: src/secp256k1
git-subtree-split: c6b6b8f1bb044d7d1aa065ebb674adde98a36a8e
fd9a0060f0 Report and verify expirations (Pieter Wuille)
86f50ed10f Delete limitedmap as it is unused now (Pieter Wuille)
cc16fff3e4 Make txid delay penalty also apply to fetches of orphan's parents (Pieter Wuille)
173a1d2d3f Expedite removal of tx requests that are no longer needed (Pieter Wuille)
de11b0a4ef Reduce MAX_PEER_TX_ANNOUNCEMENTS for non-PF_RELAY peers (Pieter Wuille)
242d16477d Change transaction request logic to use txrequest (Pieter Wuille)
5b03121d60 Add txrequest fuzz tests (Pieter Wuille)
3c7fe0e5a0 Add txrequest unit tests (Pieter Wuille)
da3b8fde03 Add txrequest module (Pieter Wuille)
Pull request description:
This replaces the transaction request logic with an encapsulated class that maintains all the state surrounding it. By keeping it stand alone, it can be easily tested (using included unit tests and fuzz tests).
The major changes are:
* Announcements from outbound (and whitelisted) peers are now always preferred over those from inbound peers. This used to be the case for the first request (by delaying the first request from inbound peers), and a bias afters. The 2s delay for requests from inbound peers still exists, but after that, if viable outbound peers remain for any given transaction, they will always be tried first.
* No more hard cap of 100 in flight transactions per peer, as there is less need for it (memory usage is linear in the number of announcements, but independent from the number in flight, and CPU usage isn't affected by it). Furthermore, if only one peer announces a transaction, and it has over 100 in flight already, we still want to request it from them. The cap is replaced with a rule that announcements from such overloaded peers get an additional 2s delay (possibly combined with the existing 2s delays for inbound connections, and for txid peers when wtxid peers are available).
* The limit of 100000 tracked announcements is reduced to 5000; this was excessive. This can be bypassed using the PF_RELAY permission (to accommodate locally dumping a batch of many transactions).
This replaces #19184, rebased on #18044 and with many small changes.
ACKs for top commit:
ariard:
Code Review ACK fd9a006. I've reviewed the new TxRequestTracker, its integration in net_processing, unit/functional/fuzzing test coverage. I looked more for soundness of new specification rather than functional consistency with old transaction request logic.
MarcoFalke:
Approach ACK fd9a0060f0🏹
naumenkogs:
Code Review ACK fd9a006. I've reviewed everything, mostly to see how this stuff works at the lower level (less documentation-wise, more implementation-wise), and to try breaking it with unexpected sequences of events.
jnewbery:
utACK fd9a0060f0
jonatack:
WIP light ACK fd9a0060f0 have read the code, verified that each commit is hygienic, e.g. debug build clean and tests green, and have been running a node on and off with this branch and grepping the net debug log. Am still unpacking the discussion hidden by GitHub by fetching it via the API and connecting the dots, storing notes and suggestions in a local branch; at this point none are blockers.
ryanofsky:
Light code review ACK fd9a0060f0, looking at txrequest implementation, unit test implementation, and net_processing integration, just trying to understand how it works and looking for anything potentially confusing in the implementation. Didn't look at functional tests or catch up on review discussion. Just a sanity check review focused on:
Tree-SHA512: ea7b52710371498b59d9c9cfb5230dd544fe9c6cb699e69178dea641646104f38a0b5ec7f5f0dbf1eb579b7ec25a31ea420593eff3b7556433daf92d4b0f0dd7
MakeWalletDatabase no longer has a default DatabaseFormat. Instead
callers, like CWallet::Create, need to specify the database type to
create if the file does not exist. If it exists and NONE is given, then
CreateWalletDatabase will try to autodetect the type.
Rewrite uses the VACUUM command which does exactly what we want. A
specific advertised use case is to compact a database and ensure that
any deleted data is actually deleted.
sqlite3 recommends that sqlite3_initialize be called when the
application starts, and sqlite3_shutdown when it stops. Since we don't
always use sqlite3, we initialize it when a SQLiteDatabse is constructed
(calling sqlite3_initialize after initialized is a no-op). We call
sqlite3_shutdown when we see that there are no databases opened. The
number of open databases is tracked by an atomic g_dbs_open.
ba8950ee01 build: optionally skip external warnings (Vasil Dimov)
Pull request description:
Add an option to `./configure` to suppress compilation warnings from
external headers. The option is off by default (no change in behavior,
show warnings from external headers).
This option is useful if e.g. Boost or Qt is installed outside of
`/usr/include` (warnings from headers in `/usr/include` are already
suppressed by default) and those warnings stand in the way of compiling
Bitcoin Core with `-Werror[=...]` or they just clutter the build output
too much and make our own warnings hard to spot.
`-isystem /usr/include` bricks GCC's `#include_next`, so we use
`-idirafter` instead. This way we don't have to treat `/usr/include`
specially.
ACKs for top commit:
practicalswift:
ACK ba8950ee0134a7958e3e9b041cd54d222feb09a1: diff looks correct!
hebasto:
ACK ba8950ee01, tested on Linux Mint 20 (x86_64).
luke-jr:
utACK ba8950ee01
Tree-SHA512: 9b54fae8590be6c79f2688a5aca09e0a9067f481dabecdd49bb278c08a62ac2b0cc704c894fbd53240e77ac84da0c7a237845df0a696cfbdb0359e1c8e2e10c9
135afa749c wallet: remove db mode string (Ivan Metlushko)
Pull request description:
This is a [follow-up](https://github.com/bitcoin/bitcoin/pull/19077#discussion_r500261927) for #19077
This PR simplifies DB interface by removing mode string from `WalletDatabase` and `WalletBatch`.
The mode string was used to determine two flags for the instantiation of db connection:
1) read-only flag. Never used on connection level. And on batch level Is only used within `BerkeleyDatabase::Rewrite` where it's replaced with bool flag.
2) create flag. Is not required as we always check `require_existing` & `require_create` flags in `MakeDatabase()` before creating actual database instance. So we can safely default to always creating database if it doesn't exist yet.
ACKs for top commit:
achow101:
ACK 135afa749c
laanwj:
Code review ACK 135afa749c
Tree-SHA512: f49c07c7387c02e517a58199620a678a918f8dfc20d1347d29fd6adea0bc89698c26cb8eef42b0977961c11c207c4bbe109bc31059f47c126cc600b01fd987eb
88197b0769 [doc] release notes for max fee checking (gzhao408)
c201d73df3 style and nits for fee-checking in BroadcastTransaction (gzhao408)
Pull request description:
Pretty trivial... addresses some tiny comments from #19339. Also fixes a docs typo from #19940 and adds a release note about the error message change for testmempoolaccept.
ACKs for top commit:
achow101:
ACK 88197b0769
MarcoFalke:
cr re-ACK 88197b0769
Tree-SHA512: fff16d731426b9b4db5222df02633983402f4c7241551eec98bb1554145dbdc132f40ed8ca4abd5edcebe1f4d1e879fb6d11bd91730604f6552c10cdf65706a1
5b77f8098d test: add p2p_lock acquires in p2p_leak_tx.py (Sebastian Falbesoner)
cc8c6823b4 test: use MiniWallet for p2p_leak_tx.py (Sebastian Falbesoner)
Pull request description:
This PR enables one more of the non-wallet functional tests (p2p_leak_tx.py) to be run even with the Bitcoin Core wallet disabled by using the new MiniWallet instead, as proposed in #20078. It also adds missing p2p_lock acquires that need to be held while modifying internal p2p Interface state (in this case the `last_message` dictionary) to avoid data races.
ACKs for top commit:
laanwj:
Code review ACK 5b77f8098d
Tree-SHA512: 6661bc6e3491a9af4bf040f379e5955c525136397e99d3eadde92e247580d0d87efff750e6d3b1f6d9a4e578144a433a982f574ef056b44dd6bca33873a1bae6
d1292f25f2 Avoid the use of abs64 in timedata (Pieter Wuille)
Pull request description:
Fixes#20135.
ACKs for top commit:
kallewoof:
ACK d1292f25f2
jonatack:
ACK d1292f25f2 code/logic review, verified there are no remaining callers of `abs64()`, verified no warnings in a debug build
practicalswift:
ACK d1292f25f2
MarcoFalke:
ACK d1292f25f2🎹
Tree-SHA512: d17e95c668eb5e02ea546433b3d1b5a0ccbfb2c9cec62fa67dad1844d7e278a2576fbc0b75bddbf4db9af7331e978148c7bef7fce7e6a07e0eb917ef1392f302
We never need to open database in read-only mode as it's controlled
separately for every batch.
Also we can safely create database if it doesn't exist already
because require_existing option is verified in MakeDatabase
before creating a new WalletDatabase instance.
This adds a --dumptests flag to the feature_taproot.py test, to dump all its
generated test cases to files, in a format compatible with the
script_assets_test unit test. A fuzzer for said format is added as well, whose
primary purpose is coverage-based minimization of those dumps.
This adds a unit test that does generic script verification tests,
with positive/negative witnesses/scriptsigs, under various flags.
The test data is large (several MB) so it's stored in the qa-assets
repo.
MarcoFalke