be72663a15 test: bumpfee, add coverage for "send coins back to yourself" (furszy)
7bffec6715 bumpfee: enable send coins back to yourself (furszy)
Pull request description:
Simple example:
1) User_1 sends 0.1 btc to user_2 on a low fee transaction.
2) After few hours, the tx is still in the mempool, user_2
is not interested anymore, so user_1 decides to cancel
it by sending coins back to himself.
3) User_1 has the bright idea of opening the explorer and
copy the change output address of the transaction. Then
call bumpfee providing such output (in the "outputs" arg).
Currently, this is not possible. The wallet fails with
"Unable to create transaction. Transaction must have at least
one recipient" error.
The error reason is because we discard the provided output
from the recipients list and set it inside the coin control
so the process adds it later (when the change is calculated).
But.. there is no later if the tx has no outputs.
ACKs for top commit:
ishaanam:
reACK be72663a15
achow101:
ACK be72663a15
Tree-SHA512: c2c38290a998f9b426a830d9624c7feb730158980ac186f8fb0138d5e200935d6538307bc60a2c3d0b7b6ee2b4ffb77a1e98baf8feb1d20a7d825f6055ac377f
fac395e5eb ci: Bump ci/lint/Dockerfile (MarcoFalke)
fa6eb65167 test: Use python3.8 pow() (MarcoFalke)
88881cf7ac Bump python minimum version to 3.8 (MarcoFalke)
Pull request description:
There is no pressing reason to drop support for 3.7, however there are several maintenance issues:
* There is no supported operating system that ships 3.7 by default. (debian:buster is EOL and unmaintained to the extent that it doesn't run in the CI environment. See https://github.com/bitcoin/bitcoin/pull/27340#issuecomment-1484988445)
* Compiling python 3.7 from source is also unsupported on at least macos, according to https://github.com/bitcoin/bitcoin/pull/24017#issuecomment-1107820790
* Recent versions of lief require 3.8, see https://github.com/bitcoin/bitcoin/pull/27507#issuecomment-1517561645
Fix all maintenance issues by bumping the minimum.
ACKs for top commit:
RandyMcMillan:
ACK fac395e
fjahr:
ACK fac395e5eb
fanquake:
ACK fac395e5eb
Tree-SHA512: c198decdbbe29d186d73ea3f6549d8a38479383495d14a965a2f9211ce39637b43f13a4c2a5d3bf56e2d468be4bbe49b4ee8e8e19ec69936ff43ddf2b714c712
33fdfc7986 test: perturb anchors.dat to test it doesn't throw an error during initialization (brunoerg)
Pull request description:
Got some inspiration from `feature_init`. This PR tests whether perturbing `anchors.dat` doesn't throw any error during initialization.
3f1f5f6f1e/src/addrdb.cpp (L223-L235)
ACKs for top commit:
MarcoFalke:
lgtm ACK 33fdfc7986
Tree-SHA512: e6584debb37647677581fda08366b45b42803022cc4c4f1d5a7bd5e9e04d64da77656dad2b804855337487bdcfc891f300a2e03668d6122de769dd14f39af9ed
4bdcf57158 test: test banlist database recreation (brunoerg)
Pull request description:
This PR adds test coverage for 'banlist database recreation'. If it wasn't able to read ban db (in `LoadBanlist`), so it should create a new (an empty, ofc) one.
d8bdee0fc8/src/banman.cpp (L28-L45)
ACKs for top commit:
MarcoFalke:
lgtm ACK 4bdcf57158
Tree-SHA512: d9d0cd0c4b3797189dff00d3a634878188e7cf51e78346601fc97e2bf78c495561705214062bb42ab8e491e0d111f8bfcf74dbc801768bc02cf2b45f162aad85
cca4f82b82 test: add coverage for rpc error when trying to rescan beyond pruned data (brunoerg)
Pull request description:
This PR adds test coverage for the following rpc error:
15692e2641/src/wallet/rpc/transactions.cpp (L896-L899)
ACKs for top commit:
MarcoFalke:
lgtm ACK cca4f82b82
aureleoules:
ACK cca4f82b82
Tree-SHA512: 724a055e9f6cddf1935699e8769015115f24f6485a0bd87e8660072ee44a15c1bddfdda848acc101ea7184b7e65a33b5b0d80b563d2ba3ecdab7a631378d6476
0c520679ab doc: add release notes for `abandoned` field in `gettransaction` and `listtransactions` (brunoerg)
a1aaa7f51f rpc, wallet: add `abandoned` field for all categories of transactions in ListTransactions (brunoerg)
Pull request description:
Fixes#25130
ACKs for top commit:
achow101:
re-ACK 0c520679ab
Tree-SHA512: 1864460d76decab7898737c96517d722055eb8f81ca52248fe1035723258c6cd4a93251e06a86ecbbb0b0a80af1466b2c86fb142ace4ccb74cc40d5dc3967d7f
bf77fc9cb4 [test] mempool full in package accept (glozow)
b51ebccc28 [validation] set PackageValidationState when mempool full (glozow)
563a2ee4f5 [policy] disallow transactions under min relay fee, even in packages (glozow)
c4554fe894 [test] package cpfp bumps parents <mempoolminfee but >=minrelaytxfee (glozow)
ac463e87df [test util] mock mempool minimum feerate (glozow)
Pull request description:
Part of package relay, see #27463.
Note that this still allows packages to bump transactions that are below the dynamic mempool minimum feerate, which means this still solves the "mempool is congested and my presigned 1sat/vB tx is screwed" problem for all transactions.
On master, the package policy (only accessible through regtest-only RPC submitpackage) allows 0-fee (or otherwise below min relay feerate) transactions if they are bumped by a child. However, with default package limits, we don't yet have a DoS-resistant way of ensuring these transactions remain bumped throughout their time in the mempool. Primarily, the fee-bumping child may later be replaced by another transaction that doesn't bump the parent(s). The parent(s) could potentially stay bumped by other transactions, but not enough to ever be selected by the `BlockAssembler` (due to `blockmintxfee`).
For example, (tested [here](https://github.com/glozow/bitcoin/commits/26933-motivation)):
- The mempool accepts 24 below-minrelayfeerate transactions ("0-fee parents"), all bumped by a single high-fee transaction ("the fee-bumping child"). The fee-bumping child also spends a confirmed UTXO.
- Two additional children are added to each 0-fee parent. These children each pay a feerate slightly above the minimum relay feerate (e.g. 1.9sat/vB) such that, for each 0-fee parent, the total fees of its two children divided by the total size of the children and parent is above the minimum relay feerate.
- If a block template is built now, all transactions would be selected.
- A transaction replaces the the fee-bumping child, spending only the confirmed UTXO and not any of the outputs from the 0-fee parents.
- The 0-fee parents now each have 2 children. Their descendant feerates are above minrelayfeerate, which means that they remain in the mempool, even if the mempool evicts all below-minrelayfeerate packages.
- If a block template is built now, none of the 0-fee parents or their children would be selected.
- Even more low-feerate descendants can be added to these below-minrelayfeerate packages and they will not be evicted until they expire or the mempool reaches capacity.
Unless we have a DoS-resistant way of ensuring package CPFP-bumped transactions are always bumped, allowing package CPFP to bump below-minrelayfeerate transactions can result in these problematic situations. See #27018 which proposes a partial solution with some limitations, and contains discussion about potential improvements to eviction strategy. While no adequate solution exists, for now, avoid these situations by requiring all transactions to meet min relay feerate.
ACKs for top commit:
ajtowns:
reACK bf77fc9cb4
instagibbs:
re-ACK bf77fc9cb4
Tree-SHA512: 28940f41493a9e280b010284316fb8caf1ed7b2090ba9a4ef8a3b2eafc5933601074b142f4f7d4e3c6c4cce99d3146f5c8e1393d9406c6f2070dd41c817985c9
These routines look fancy, but do nothing more than converting between
byte objects of length 32 to/from integers in little endian byte order
and can be replaced by simple one-liners, using the int.{from,to}_bytes
methods (available since Python 3.2).
6e9f8bb050 rpc, tests: in `utxoupdatepsbt` also look for the transaction in the txindex (ishaanam)
a5b4883fb4 rpc: extract psbt updating logic into ProcessPSBT (ishaanam)
Pull request description:
Previously the `utxoupdatepsbt` RPC, added in #13932, only updated the inputs spending segwit outputs with the `witness_utxo`, because the full transaction is needed for legacy inputs. Before this RPC looked for just the utxos in the utxo set and the mempool. This PR makes it so that if the user has txindex enabled, then the full transaction is looked for there for all inputs. If it is not found in the txindex or txindex isn't enabled, then the mempool is checked for the full transaction. If the transaction an input is spending from is still not found at that point, then the utxo set is searched and the inputs spending segwit outputs are updated with just the utxo.
ACKs for top commit:
achow101:
ACK 6e9f8bb050
Xekyo:
ACK 6e9f8bb050
Tree-SHA512: 078db3c37a1ecd5816d80a42e8bd1341e416d661f508fa5fce0f4e1249fefd7b92a0d45f44957781cb69d0953145ef096ecdd4545ada39062be27742402dac6f
Prior to PR #27468 (commit 11422cc572) all
call-sites of `GetQueryParameter(...)` in the REST module could trigger
a crash. Add missing test cases for all possible code-paths as a
regression test, as a foundation for possible follow-up fixes (which aim
to resolve this issue in a more general and robust way).
e07dd5fff9 test: fix bumpfee 'spend_one_input' occasional failure (furszy)
Pull request description:
CI test failure, in master: https://cirrus-ci.com/task/5975232842825728.
In #27469https://cirrus-ci.com/task/6452468402356224
Most of the subtests in `wallet_bumpfee.py` expect to find spendable UTXOs of 0.001 btc in the rbf wallet. They use the `spend_one_input()` method which fails if none of them exist.
The sporadic failure comes from the recently added `test_feerate_checks_replaced_outputs` subtest that can spend all them. Leaving the next subtests with no 0.001 UTXOs to spend.
To solve it, this PR moves the recently added case into a "context independent subtests" section.
Which is placed at the end to not affect other cases.
ACKs for top commit:
achow101:
ACK e07dd5fff9
pablomartin4btc:
ACK e07dd5fff9.
Tree-SHA512: c150ed6fcfbb6f1502eaf6370a57aae0da991c0fc48e8bb3d446805f4336abba5d80ff0de26094914da95432dd0255030fe527001af4510dfdcefbc7230f14d6
`evhttp_uri_parse` can return a nullptr, for example when the URI
contains invalid characters (e.g. "%").
`GetQueryParameterFromUri` passes the output of `evhttp_uri_parse`
straight into `evhttp_uri_get_query`, which means that anyone calling
a REST endpoint in which query parameters are used (e.g. `rest_headers`)
can cause a segfault.
This bugfix is designed to be minimal and without additional behaviour change.
Follow-up work should be done to resolve this in a more general and robust way,
so not every endpoint has to handle it individually.
Most of the subtests in wallet_bumpfee.py expect to
find spendable UTXOs of 0.001 btc in the rbf wallet
(they use the 'spend_one_input()' method that tries
to spend one of them and if it doesn't find any, it
throws an exception).
The sporadic failure comes from the recently added
'test_feerate_checks_replaced_outputs' subtest that
can spend all them. Leaving the next subtests with
no 0.001 UTXOs to spend.
To solve it, this PR moves the recently added case
into a "context independent subtests" section.
Which is placed at the end to not affect other cases.
d52fa1b0a5 tests: Make sure that bumpfee feerate checks work when replacing outputs (Andrew Chow)
be177c15a4 bumpfee: Check the correct feerate when replacing outputs (Andrew Chow)
Pull request description:
When replacing the outputs of a transaction during `bumpfee`, it is possible to accidentally create a transaction that will not be accepted into the mempool as it does not meet the incremental relay fee requirements. This occurs because the size estimation used for checking the provided feerate does not account for the replaced outputs; it instead uses the original outputs. When the replaced outputs is significantly different from the original, there can be a large difference in estimated transaction sizes that can make a transaction miss the absolute fee requirements for the incremental relay fee. Unfortunately we do not currently inform the user when the bumped transaction fails to relay, so they could use `bumpfee` and think the transaction has been bumped when it actually has not.
This issue is resolved by replacing the outputs before doing the size estimation, and also updating the feerate checker to use the actual fee values when calculating the required minimum fee.
Also added a test for this scenario.
ACKs for top commit:
ishaanam:
reACK d52fa1b0a5
Xekyo:
reACK d52fa1b0a5
Tree-SHA512: d18301b587465322dd3fb1bb86496c3675265a56072047576e2baa5cf907dd3b54778f30721f662f0c235709a5568427c18542eb7efbfb6fdd9f481fe676c66b
7ccdd741fe test: fix importmulti/importdescriptors assertion (Jon Atack)
19d888ce40 rpc: move WALLET_FLAG_CAVEATS to the compilation unit of its caller (Jon Atack)
01df011ca2 doc: release note for wallet RPCs "warning" field deprecation (Jon Atack)
9ea8b3739a test: createwallet "warning" field deprecation test (Jon Atack)
645d7f75ac rpc: deprecate "warning" field in {create,load,unload,restore}wallet (Jon Atack)
2f4a926e95 test: add test coverage for "warnings" field in createwallet (Jon Atack)
4a1e479ca6 rpc: add "warnings" field to RPCs {create,load,unload,restore}wallet (Jon Atack)
079d8cdda8 rpc: extract wallet "warnings" fields to a util helper (Jon Atack)
f73782a903 doc: fix/improve warning helps in {create,load,unload,restore}wallet (Jon Atack)
Pull request description:
Based on discussion and concept ACKed in #27138, add a `warnings` field to RPCs createwallet, loadwallet, unloadwallet, and restorewallet as a JSON array of strings to replace the `warning` string field in these 4 RPCs. The idea is to more gracefully handle multiple warning messages and for consistency with other wallet RPCs. Then, deprecate the latter fields, which represent all the remaining RPC `warning` fields.
The first commit f73782a903 implements https://github.com/bitcoin/bitcoin/pull/27138#issuecomment-1474789198 as an alternative to #27138. One of those two could potentially be backported to our currently supported releases.
ACKs for top commit:
achow101:
ACK 7ccdd741fe
1440000bytes:
utACK 7ccdd741fe
vasild:
ACK 7ccdd741fe
pinheadmz:
re-ACK 7ccdd741fe
Tree-SHA512: 314e0a4c41fa383d95e2817bfacf359d449e460529d235c3eb902851e2f4eacbabe646d9a5a4beabc4964cdfabf6397ed8301366a58d344a2f787f83b75e9d64
Instead of storing and passing around fixed strings for the purpose of
an address, use an enum.
This also rationalizes the CAddressBookData struct, documenting all fields and
making them public, and simplifying the representation to avoid bugs like
https://github.com/bitcoin/bitcoin/pull/26761#discussion_r1134615114 and make
it not possible to invalid address data like change addresses with labels.
Co-authored-by: Ryan Ofsky <ryan@ofsky.org>
When replacing the outputs of a transaction, we can end up with
fees that are drastically different from the original. This tests that
the feerate checks we perform will properly detect when the bumping tx
will have an insufficient feerate.
f842ed9a40 test: refactor: replace unnecessary `BytesIO` uses (Sebastian Falbesoner)
Pull request description:
Rather than needing to create intermediate stream variables, we can use helper functions like `tx_from_hex` instead or access the result directly, leading both to increased readability and less code.
ACKs for top commit:
stickies-v:
ACK f842ed9a40
brunoerg:
crACK f842ed9a40
aureleoules:
ACK f842ed9a40 - It seems that these are the only instances that can be changed and it simplifies test code.
Tree-SHA512: 7f4fd7a26720d1988bf27f66c817ff6cd7060350a3be62d28e7848c768fd43578719ca475193d4057ccf4f2458af18564fd513fe3a1d458a11c799927c12bd65
Rather than needing to create intermediate stream variables, we can use
helper functions like `tx_from_hex` instead or access the result
directly, leading both to increased readability and less code.
Also, move the burden of checking for a timeout to the client and
disable the timeout on the server. This should avoid intermittent issues
in slow tests (for example mining_getblocktemplate_longpoll.py, or
feature_dbcrash.py), or possibly when the server is running slow (for
example in valgrind). There shouldn't be any downside in tests caused
by a high rpcservertimeout.
e669833943 test: dedup package limit checks via decorator in mempool_package_limits.py (Sebastian Falbesoner)
72f25e238c test: refactor: use Satoshis for fees in mempool_package_limits.py (Sebastian Falbesoner)
Pull request description:
The subtests in the functional test mempool_package_limits.py all follow the same pattern:
1. first, check that the mempool is currently empty
2. create and submit certain single txs to the mempool, prepare list of hex transactions
3. check that `testmempoolaccept` on the package hex fails with a "package-mempool-limits" error on each tx result
4. after mining a block, check that submitting the package succeeds
Note that steps 1,3,4 are identical for each of the subtests and only step 2 varies, so this might be a nice opportunity to deduplicate code by using a newly introduced decorator which executes the necessary before and after the essential part of the subtest. This also makes it easier to add new subtests without having to copy-paste those parts once again.
In addition, the first commit switches the fee unit from BTC to Satoshis, which allows to get rid of some imports (`COIN` and `Decimal`) and a comment for the `test_desc_size_limits` subtest is fixed (s/25KvB/21KvB/).
ACKs for top commit:
ismaelsadeeq:
ACK e669833943
glozow:
utACK e669833943
Tree-SHA512: 84a85e739de7387391c13bd46aeb015a74302ea7c6f0ca3d4e2b1b487d38df390dc118eb5b1c11d3e4206bff316a4dab60ef6b25d8feced672345d4e36ffd205
e47ce42f67 refactor: use address_to_scriptpubkey to retrieve addresses scriptpubkey (ismaelsadeeq)
4142d19d74 refactor: move address_to_scriptpubkey to address.py (ismaelsadeeq)
Pull request description:
PR #27269 enables the function address_to_scriptpubkey() to decode all address types and return their corresponding scriptpubkeys. As a result, there is no longer any need to call getaddressinfo or validateaddress RPCs in order to retrieve an address scriptpubkey, as explained in the comments on this pull request (see https://github.com/bitcoin/bitcoin/pull/27269#pullrequestreview-1353681933 and https://github.com/bitcoin/bitcoin/pull/27269#issuecomment-1481016118).
Instead of using RPC calls, this update replaces the process of obtaining an address scriptPubkey with the address_to_scriptpubkey method, resulting in improved performance for functional tests.
ACKs for top commit:
josibake:
re-ACK e47ce42f67
theStack:
ACK e47ce42f67🌱
Tree-SHA512: 05285349a7d5ce7097b8f2582e573a5135c6deef85ea9936f68f6ce94e9ebb1d84d94f7fc7e5ed833a698e01585addd80deb52e6338f8aee985bf14db45417d2
This avoids having to convert from BTC to Sats and needs less imports.
Also specify the tx's target size in vsize rather than in weight, which
allows us to specify the fee-rate by a simple multiplication, rather
than having another magic number for it.
This commit updates the code by replacing the RPC call used to
decode an address and retrieve its corresponding scriptpubkey
with the address_to_scriptpubkey function. address_to_scriptpubkey
function can now decode all addresses formats, which makes
it more efficient to use.
The COINBASE_MATURITY constant in blocktools.py is imported in wallet.py.
However, importing address_to_scriptpubkey to blocktools.py will
generate a circular import error. Since the method is related to
addresses, it is best to move it to address.py, which will also
fix the circular import error.
Update imports of address_to_scriptpubkey accordingly.
8aab5157c5 test: wallet_create_tx.py fix race (furszy)
Pull request description:
Fixes#27316
Because wallets are internally synchronized through the validation interface,
and the interface dispatches events on a worker thread, it is possible for a
transaction created by the first wallet to not arrive to the second wallet
before the second wallet attempts to use one of its outputs. This is because
we do not wait for the `BroadcastTransaction` callback during the wallet's
"submit to mempool" process. To address this in the tests, we need to
manually sync the validation queue.
ACKs for top commit:
josibake:
ACK 8aab5157c5
theStack:
ACK 8aab5157c5
Tree-SHA512: 76364370ab292a5c3ea1ed61cd353fc626a9e9cd6ce18464c24da1b3dcb34b65006e2bc42b84bbd25af03f9449231990bf789504728972db3217b569099eb309
d178082996 test: add bech32 decoding support to address_to_scriptpubkey() (ismaelsadeeq)
aac8793c7a test: test_bech32_decode in address.py (ismaelsadeeq)
Pull request description:
[rpc_scantxoutset.py](e695d8536e/test/functional/rpc_scantxoutset.py (L26)) sendtodestination only sends to legacy addresses and scriptPubkeys because [wallet.py](e695d8536e/test/functional/test_framework/wallet.py (L415)) address_to_scriptpubkey does not support conversion of segwit address.
This update enables address_to_scriptpubkey to support the conversion of testnet segwit addresses to scriptPubkeys.
This change will enable [rpc_scantxoutset.py](e695d8536e/test/functional/rpc_scantxoutset.py (L22)) ScantxoutsetTest to have more test coverage by adding more sendtodestination calls with bech32 and bech32m testnet addresses, then test the bech32 and bech32m derivation subsets UTXO amount in [Test extended key derivation](e695d8536e/test/functional/rpc_scantxoutset.py (L84)).
I will add the test coverage in a subsequent Pull request.
ACKs for top commit:
josibake:
ACK d178082996
theStack:
ACK d178082996✔️
willcl-ark:
ACK d17808299
Tree-SHA512: 312c20ce192c648faf7dd178622700c9b871d755db56c246250e25508c3c19e7b02c0ae901dda11a1794629b9a9429c877168c05e1c4c1dbf41493316e30e7e9
Because wallets are internally synchronized
through the validation interface, and the
interface dispatches events on a worker thread,
it is possible for a transaction created by the
first wallet to not arrive at the second wallet
before the second wallet attempts to use one of
its outputs. This is because we do not wait for
the BroadcastTransaction callback during the wallet's
"submit to mempool" process. To address this in the
tests, we need to sync the validation queue.
f3221d373a test: add wallet too-long-mempool-chain error coverage (furszy)
acf0119d24 wallet: return error msg for too-long-mempool-chain failure (furszy)
Pull request description:
Fixes#23144.
We currently return a general "Insufficient funds" from Coin
Selection when we actually skipped unconfirmed UTXOs that
surpassed the mempool ancestors limit.
This PR make the error clearer by returning:
"Unconfirmed UTXOs are available, but spending them creates
a chain of transactions that will be rejected by the mempool"
Also, added an early return from Coin Selection if the sum of
the discarded coins decreases the available balance below the
target amount.
ACKs for top commit:
achow101:
ACK f3221d373a
S3RK:
Code review ACK f3221d373a
Xekyo:
ACK f3221d373a
Tree-SHA512: 13e5824b75ac302280ff894560a4ebf32a74f32fe49ef8281f2bc99c0104b92cef33d3b143c6e131f3a07eafe64533af7fc60abff585142c134b9d6e531a6a66
fa0696e786 test: Replace threading with concurrent.futures (MarcoFalke)
Pull request description:
`threading` has no easy way to get the return value or exception once the target function stops. Not checking the return value or exception can make tests more fragile and failures harder to debug.
Fix this by checking the return value (or exception) by wrapping the function execution into a future and calling `result()` on it.
Can be reviewed with `--ignore-all-space`.
(There are still some uses of `threading` around, because some tests do expect an exception to be thrown and caught in the target function)
ACKs for top commit:
ishaanam:
ACK fa0696e786
stickies-v:
ACK fa0696e786
Tree-SHA512: d9ddf6b3c530cd8c485a030a3c84d4e03d3e9f9ea8240b050afcd566a884f5cabe816ac56910cec9ea9fa299239e5abb99e672dda05a74974f61bb68dc3c1d65
fa18504d57 rpc: Add submit option to generateblock (MarcoFalke)
fab9a08e14 refactor: Replace block_hash with block_out (MarcoFalke)
Pull request description:
When submit is turned off, a block can be generated and returned as hex, to be used for further tests. For example, it can be submitted on a different node, on a different interface (like p2p), or just never submitted and be used for other testing purposes.
ACKs for top commit:
instagibbs:
ACK fa18504d57
TheCharlatan:
tACK fa18504d57
Tree-SHA512: 1b2ab6b71bb7e155c6482d75f5373f4e77de6446cb16bc2dfd19e7a4075b3a6ad87d7ad7a049a9eed934cb71574acfd27202f54c8bb3b03fac869f2e95db7ee5
Adds bech32_to_bytes() which can decode a bech32 address and return the
version as an `int` and the payload in bytes.
bech32_to_bytes() is used by the test_bech32_decode unit test to test
decoding of segwit addresses.
4b7aec2951 Add mempool tracepoints (virtu)
Pull request description:
This PR adds multiple mempool tracepoints.
| tracepoint | description |
| ------------- | ------------- |
| `mempool:added` | Is called when a transaction enters the mempool |
| `mempool:removed` | ... when a transaction is removed from the mempool |
| `mempool:replaced` | ... when a transaction is replaced in the mempool |
| `mempool:rejected` | ... when a transaction is rejected from entering the mempool |
The tracepoints are further documented in `docs/tracing.md`. Usage is demonstrated in the example script `contrib/tracing/mempool_monitor.py`. Interface tests are provided in `test/functional/interface_usdt_mempool.py`.
The rationale for passing the removal reason as a string instead of numerically is that the benefits of not having to maintain a redundant enum-string mapping seem to outweigh the small cost of string generation. The reject reason is passed as string as well, although in this instance the string does not have to be generated but is readily available.
ACKs for top commit:
0xB10C:
ACK 4b7aec2951
achow101:
ACK 4b7aec2951
Tree-SHA512: 6deb3ba2d1a061292fb9b0f885f7a5c4d11b109b838102d8a8f4828cd68f5cd03fa3fc64adc6fdf54a08a1eaccce261b0aa90c2b8c33cd5fd3828c8f74978958
Tracepoints for added, removed, replaced, and rejected transactions.
The removal reason is passed as string instead of a numeric value, since
the benefits of not having to maintain a redundant enum-string mapping
seem to outweigh the small cost of string generation. The reject reason
is passed as string as well, although here the string does not have to
be generated but is readily available.
So far, tracepoint PRs typically included two demo scripts: a naive
bpftrace script to show raw tracepoint data and a bcc script for a more
refined view. However, as some of the ongoing changes to bpftrace
introduce a certain degree of unreliability (running some of the
existing bpftrace scripts was not possible with standard kernels and
bpftrace packages on latest stable Ubuntu, Debian, and NixOS), this PR
includes only a single bcc script that fuses the functionality of former
bpftrace and bcc scripts.
