66f6efc70a rpc: improve TransactionDescriptionString() "generated" help (Jon Atack)
296cfa312f test: add listtransactions/listsinceblock "trusted" coverage (Jon Atack)
d95913fc43 rpc: fix "trusted" description in TransactionDescriptionString (Jon Atack)
Pull request description:
The RPC gettransaction, listtransactions, and listsinceblock helps returned by `TransactionDescriptionString()` inform the user that the `trusted` boolean field is only present if the transaction is trusted and safe to spend from.
The field is in fact returned by `WalletTxToJSON()` when the transaction has 0 confirmations (or negative confirmations, if conflicted), and it can be true or false.
This patch fixes the help, adds test coverage, and touches up the help for the neighboring `generate` field.
ACKs for top commit:
rajarshimaitra:
tACK 66f6efc70a
theStack:
Tested ACK 66f6efc70a
Tree-SHA512: 4c2127765b82780e07bbdbf519d27163d414d9f15598e01e02210f210e6009be344c84951d7274e747b1386991d4c3b082cd25aebe885fb8cf0b92d57178f68e
9c1052a521 wallet: Default new wallets to descriptor wallets (Andrew Chow)
f19ad40463 rpc, wallet: Descriptor wallets are no longer experimental (Andrew Chow)
Pull request description:
Changes the default wallet type from legacy to descriptors. Descriptor wallets will now by the default type. Additionally, descriptor wallets will no longer be marked as experimental.
This follows the timeline proposed in #20160
ACKs for top commit:
lsilva01:
Tested ACK 9c1052a521 on Ubuntu 20.04
prayank23:
tACK 9c1052a521
meshcollider:
Code review ACK 9c1052a521
Tree-SHA512: 834e6fec88e0c18673af7ebe135bd5333694d1be502164eb93a90e3e76c27974165aa4e59426945100c88e4eca07356e16886ef5b05cf789683ecb23fc71a12a
fa6c62f34b test: Replace log with assert_equal in wallet_abandonconflict (MarcoFalke)
Pull request description:
This will make the test fail as soon as the bug is fixed, forcing it to
be updated. Otherwise, the bug might be fixed (or made worse)
accidentally, leaving the test in an inconsistent state.
ACKs for top commit:
theStack:
Concept and code-review ACK fa6c62f34b
brunoerg:
tACK fa6c62f34b
Tree-SHA512: 416f72380164bf3f93332a5cfa81a8e61d8ada3714ef6815889ed3cf2d16c09411760dee4acf19629227e565b765b3dea491a0b23efd38eb370254cfadf7c441
fadf1186c8 p2p: Use mocktime for ping timeout (MarcoFalke)
Pull request description:
It is slightly confusing to use mocktime for some times, but not others.
Start fixing that by making the ping timeout use mocktime.
The only downside would be that tests that use mocktime disconnect peers after this patch. However, I don't think this is an issue, as the inactivity check is already disabled for all functional tests after commit 6d76b57ca0. Only one unit test needed the inactivity check disabled as part of this patch.
A nice side effect of this patch is that the `p2p_ping` functional test now runs 4 seconds faster.
ACKs for top commit:
laanwj:
Code review ACK fadf1186c8
Tree-SHA512: e9e7b21040a89d9d574b3038f85a67e6336de6cd6e41aa286769cd03cada6e75a94ec01700e052e56d822ef85d7813cc06bf7e67b81543eff8917a16cdccf942
This will make the test fail as soon as the bug is fixed, forcing it to
be updated. Otherwise, the bug might be fixed (or made worse)
accidentally, leaving the test in an inconsistent state.
b7884dd1b6 test: bip125-replaceable in listsinceblock (brunoerg)
Pull request description:
This PR adds test coverage for bip125-replaceable in listsinceblock. I added this test into wallet_listtransactions.py instead of putting it into wallet_listsinceblock.py to utilize the scenario already created in wallet_listtransactions.py and avoid repetition.
ACKs for top commit:
theStack:
ACK b7884dd1b6
promag:
ACK b7884dd1b6.
stratospher:
tested ACK b7884dd. Verified the bip125-replaceable status of some transactions with listsinceblock.
lsilva01:
tACK b7884dd on Ubuntu 20.04
Tree-SHA512: 510dfe5a6f9d68e5a656514d356dc8fe99324296ed8caa78f0eb4b6c6906cf70b1fb50bde80aa6f61d726b2fa1d4ce1fe48c635ce24285588e56ceff92291617
4ac8c89ad9 test: check that bumpfee RPC fails for txs with descendants in mempool (Sebastian Falbesoner)
Pull request description:
This PR adds missing test coverage for the bumpfee RPC error _"Transaction has descendants in the mempool"_,
6419bdfeb1/src/wallet/feebumper.cpp (L29-L32)
which is thrown if the bumped tx has descendants in the mempool and is _not_ connected to the bitcoin wallet (for those, the error "Transaction has descendants in the Wallet" is thrown a few lines above). To achieve that, the test framework's MiniWallet is used.
ACKs for top commit:
brunoerg:
tACK 4ac8c89ad9
promag:
Code review ACK 4ac8c89ad9. Nice stuff!
lsilva01:
Tested ACK 4ac8c89 cad756b10c9dee2d9e1405 on Ubuntu 20.04.
stratospher:
tested ACK 4ac8c89.
Tree-SHA512: 83e99f9dd2b140c0c0597c0c36c9c948fa334871be40e58a5e004440698d9685661c69bb83ab937d30f692545a3799705f991b31904f2ef31a2fbc3ae1179fa8
130ee48108 test: get and decode tx with a single `gettransaction` RPC call (Sebastian Falbesoner)
Pull request description:
Rather than subsequently calling `gettransaction` and `decoderawtransaction` to get the decoded information for a specific tx-id, we can simply use the verbose version of `gettransaction`, which returns this in a 'decoded' key. I.e.
```
node.decoderawtransaction(node.gettransaction(txid)['hex'])
```
can simply be replaced by:
```
node.gettransaction(txid=txid, verbose=True)['decoded']
```
Rationale: shorter code, shorter test logs, less RPC calls.
ACKs for top commit:
stratospher:
tested ACK 130ee48
amadeuszpawlik:
tACK 130ee48108
lsilva01:
Tested ACK 130ee48 on Ubuntu 20.04.
shaavan:
ACK 130ee48108
Tree-SHA512: cf0bd26e1e21b8022fb8062857906e0706f0ee32d3277f985c461e2519405afe445ab005f5f763fb268c7b4d6e48b2d47eda7af8621b3bce67cece8dfc9bc153
fa2d611bed style: Sort (MarcoFalke)
fa1e5de2db scripted-diff: Move bloom to src/common (MarcoFalke)
fac303c504 refactor: Remove unused MakeUCharSpan (MarcoFalke)
Pull request description:
To avoid having all files at the top level `./src` directory, start moving them to their respective sub directory according to https://github.com/bitcoin/bitcoin/issues/15732.
`bloom` currently depends on libconsensus (`CTransaction`, `CScript`, ...) and it is currently located in the libcommon. Thus, move it to `src/common/`. (libutil in `src/util/` is for stuff that doesn't depend on libconsensus).
ACKs for top commit:
theStack:
Code-review ACK fa2d611bed
ryanofsky:
Code review ACK fa2d611bed
fanquake:
ACK fa2d611bed - source shuffle starts now.
Tree-SHA512: d2fbc31b81741e9f0be539e1149542c9ca39958c240e12e8e757d882beccd0f0debdc10dcce146a05f03ef9f5c6247900a461a7a4799b515e8716dfb9af1fde2
b65a25a846 log: improve addrman logging (Martin Zumsande)
Pull request description:
The addrman helper functions `GetNewBucket()` and `GetTriedBucket()`
1) log into the wrong category (`BCLog::NET` instead of `BCLog::ADDRMAN`)
2) log too unspecifically - especially `GetTriedBucket()` gets called from many different places (e.g. `Check_()`, `Serialize()`), it seems sufficient to me logging these when moving an address from new to tried. Running a node with `-checkaddrman=1`and net logging currently results in a lot of repetitive log entries.
This PR moves these log entries to `Add_()` and `Good_()` and also adds logging for `Select_()` (allowing statistics about New/Tried success probabilities), `GetAddr_()`, `ClearNew()` and `MakeTried()`.
ACKs for top commit:
jnewbery:
ACK b65a25a846
vasild:
ACK b65a25a846
Tree-SHA512: 90ab0f64eb44b7388a198efccb613577b74989fea73194bda7de8bfbd50bdb19127cb12f5ec645c7859afdb89290614a79e255f3af0a63a58d4f21aa8fe7b696
5c34507ecb core_write: Rename calculate_fee to have_undo for clarity (fyquah)
8edf6204a8 release-notes: Add release note about getblock verbosity level 3. (fyquah)
459104b2aa rest: Add test for prevout fields in getblock (fyquah)
4330af6f72 rpc: Add test for level 3 verbosity getblock rpc call. (fyquah)
51dbc167e9 rpc: Add level 3 verbosity to getblock RPC call. (fyquah)
3cc95345ca rpc: Replace boolean argument for tx details with enum class. (fyquah)
Pull request description:
Author of #21245 expressed [time issues](https://github.com/bitcoin/bitcoin/pull/21245#issuecomment-902332088) in the original PR. Given that #21245 has received a lot of review*, I have decided to open this new pull request with [modifications required to get ACK from luke-jr ](https://github.com/bitcoin/bitcoin/pull/21245#issuecomment-905150806) and a few nits of mine.
### Original PR description
> Display the prevout in transaction inputs when calling getblock level 3 verbosity. This PR affects the existing `/rest/block` API by adding a `prevout` fields to tx inputs. This is mentioned in the change to the release notes.
>
> I added some functional tests that
>
> * checks that the RPC call still works when TxUndo can't be found
>
> * Doesn't display the "value" or "scriptPubKey" of the previous output when at a lower verbosity level
>
>
> This "completes" the issue #18771
### Possible improvements
* b0bf4f255f - I can include even this commit to this PR if deemed useful or I can leave it for a follow-up PR. See https://github.com/bitcoin/bitcoin/pull/21245#issuecomment-894853784 for more context.
### Examples
Examples of the `getblock` output with various verbose levels. Note that `000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5` contains only 2 transactions.
#### Verbose level 0
```bash
./bitcoin-cli -testnet getblock 000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5 0
```
##### Verbose level 1
```bash
./bitcoin-cli -testnet getblock 000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5 1
```
##### Verbose level 2
```bash
./bitcoin-cli -testnet getblock 000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5 2
```
##### Verbose level 3
```bash
./bitcoin-cli -testnet getblock 000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5 3
```
#### REST
```bash
curl -H "content-type:text/plain;" http://127.0.0.1:18332/rest/block/000000000000001f682b188971cc1a121546be4e9d5baf22934fdc7f538288d5.json
```
<sub>* ... and my everyday obsessive checking of my email inbox whether the PR moves forward.</sub>
Edit laanwj: Removed at symbol from message, and large example output to prevent it from all ending up in the commit message.
ACKs for top commit:
0xB10C:
ACK 5c34507ecb
meshcollider:
utACK 5c34507ecb
theStack:
ACK 5c34507ecb👘
promag:
Concept ACK 5c34507ecb
Tree-SHA512: bbff120d8fd76e617b723b102b0c606e0d8eb27f21c631d5f4cdab0892137c4bc7c65b1df144993405f942c91be47a26e80480102af55bff22621c19f518aea3
9de0d94508 doc: add disclaimer highlighting shortcomings of the basic multisig example (Michael Dietz)
f9479e4626 test, doc: basic M-of-N multisig minor cleanup and clarifications (Michael Dietz)
e05cd0546a doc: add another signing flow for multisig with descriptor wallets and PSBTs (Michael Dietz)
17dd657300 doc: M-of-N multisig using descriptor wallets and PSBTs, as well as a signing flow (Michael Dietz)
1f20501efc test: add functional test for multisig flow with descriptor wallets and PSBTs (Michael Dietz)
Pull request description:
Aims to resolve issue https://github.com/bitcoin/bitcoin/issues/21278. I try to follow the steps laanwj outlined there exactly, with the exception of using `combinepsbt` instead of `joinpsbts`. I wrote a functional test to make sure it works as expected before doing the docs, and figured it would also be a good source of documentation. So I kept the test as simple as possible and didn't go crazy with edge-cases and various checks. I do have a lot more test-cases I've written that I will follow up with (either in a separate PR or another commit - lmk if you have a preference), but I want to do it in a way that doesn't bloat this test so it remains useful as a quickstart (unless that's a bad idea)?
ACKs for top commit:
S3RK:
Code review ACK 9de0d94. Rspigler's argument convinced me that we should leave the workflow with two wallets. I assume using multisig with external signers is a popular use-case and it's important to keep compatibility.
laanwj:
Code and documentation review ACK 9de0d94508
Tree-SHA512: 6c76e787c21f09d8be5eaa11f3ca3eaa4868497824050562bdfb2095c73b90f5e8987a8775119891d6bfde586e3f31ad1b13e4b67b0802e1d23ef050227a1211
fac62e6ff5 test: Delete generate* calls from TestNode (MarcoFalke)
fac7f6102f test: Use generate* node RPC, not wallet RPC (MarcoFalke)
faac1cda6e test: Use generate* from TestFramework, not TestNode (MarcoFalke)
Pull request description:
Deleting the methods is needed for #22567 to pave the way to make it easier to implicitly call the `sync_all` member function.
Without the methods being deleted, nothing prevents developers from adding calls to it. As history showed, developers *will* add calls to it. For example, see commit eb02dbba3c from today or the first commit in this pull request.
ACKs for top commit:
stratospher:
Tested ACK fac62e6.
brunoerg:
tACK fac62e6ff5
promag:
Code review ACK fac62e6ff5.
Tree-SHA512: 6d4dea8f95ead954acfef2e6a5d98897ce0c2d02265c5b137bb149d0265543bd51d7e8403e1945b9af75df5524ca50064fe1d2a432b25c8abc71bbb28ed6ed53
bda620aecd test: check abandoned tx in listsinceblock (brunoerg)
Pull request description:
This PR tests if the abandoned transaction is correct in listsinceblock return (wallet_abandonconflict.py).
ACKs for top commit:
jonatack:
ACK bda620aecd
theStack:
ACK bda620aecd
stratospher:
Tested ACK bda620a. This PR verifies whether the transaction txAB1 has been abandoned in listsinceblock and is a nice addition to the test!
Tree-SHA512: e4dce344cf621de7a8b5bd8660d252419772a293080fc881f6f448b6df85c6b1c8f0df619e855a40b6393f53c836f0d7fadbd3916c20cccd3a95830b8b502991
Rather than subsequently calling `gettransaction` and
`decoderawtransaction` to get the decoded information for a specific
tx-id, we can simply use the verbose version of `gettransaction`, which
returns this in a 'decoded' key. I.e.
node.decoderawtransaction(node.gettransaction(txid)['hex'])
can be replaced by:
node.gettransaction(txid=txid, verbose=True)['decoded']
This commit adds missing test coverage for the bumpfee RPC
error "Transaction has descendants in the mempool", which is
thrown if the bumped tx has descendants in the mempool and is
_not_ connected to the bitcoin wallet. To achieve that, the
test framework's MiniWallet is used.
6531599f42 test: Add check that newkeypool flushes change addresses too (Samuel Dobson)
84fa19c77a Add release notes for keypool flush changes (Samuel Dobson)
f9603ee4e0 Add test for flushing keypool with newkeypool (Samuel Dobson)
6f6f7bb36c Make legacy wallet upgrades from non-HD to HD always flush the keypool (Samuel Dobson)
2434b10781 Fix outdated keypool size default (Samuel Dobson)
22cc797ca5 Add newkeypool RPC to flush the keypool (Samuel Dobson)
Pull request description:
This PR makes two main changes:
1) Adds a new RPC `newkeypool` which will entirely flush and refill the keypool.
2) When upgradewallet is called on old, non-HD wallets upgrading them to HD, we now always flush the keypool and generate a new one, to immediately start using the HD generated keys.
This PR is motivated by a number of users with old, pre-compressed-key wallets upgrading them and being confused about why they still can't generate p2sh-segwit or bech32 addresses -- this is due to uncompressed keys remaining in the keypool post-upgrade and being illegal in these newer address formats. There is currently no easy way to flush the keypool other than to call `getnewaddress` a hundred/thousand times or an ugly hack of using a `sethdseed` call.
ACKs for top commit:
laanwj:
re-ACK 6531599f42
meshcollider:
Added new commit 6531599f42 to avoid invalidating previous ACKs.
instagibbs:
ACK 6531599f42
Tree-SHA512: 50c79c5d42dd27ab0ecdbfdc4071fdaa1b2dbb2f9195ed325b007106ff19226419ce57fe5b1539c0c24101b12f5e034bbcfb7bbb0451b766cb1071295383d774
b5950dd59c validation: put coins cache write log into bench debug log (Anthony Towns)
31b2b802b5 blockstorage: use debug log category (Anthony Towns)
da94ebc2fa validation: move header validation error logging to VALIDATION debug category (Anthony Towns)
1d7d835ec3 validation: include block hash when reporting prev block not found errors (Anthony Towns)
Pull request description:
Moves the following log messages into debug log categories:
* "AcceptBlockHeader: ..." to validation
* "Prune: deleted blk/rev" to new blockstorage log category
* "Leaving block file" moves from validation to blockstorage
* "write coins cache to disk" to bench
Also adds the hash of the block to the log message when AcceptBlockHeader is rejecting because of problems with the prev block.
ACKs for top commit:
practicalswift:
cr ACK b5950dd59c
Empact:
Code review ACK b5950dd59c
laanwj:
Code review ACK b5950dd59c
promag:
Code review ACK b5950dd59c.
meshcollider:
Code review ACK b5950dd59c
Tree-SHA512: a73fdbfe8d36da48a3e89c2d5e0b6a3c5045d280c1a57f61c38d0d21f4f198aece4bd85155be3439e179d5dabdb523bf15fa0395e0e3ceff19c878ba3112c840
fa6f29de51 bitcoin-tx: Reject non-integral and out of range multisig numbers (MarcoFalke)
fafab8ea5e bitcoin-tx: Reject non-integral and out of range sequence ids (MarcoFalke)
fa53d3d826 test: Check that bitcoin-tx accepts whitespace around sequence id and multisig numbers (MarcoFalke)
Pull request description:
Seems odd to silently accept arbitrary strings that don't even represent integral values.
Fix that.
ACKs for top commit:
practicalswift:
cr ACK fa6f29de51
laanwj:
Code review ACK fa6f29de51
Empact:
Code review ACK fa6f29de51
promag:
Code review ACK fa6f29de51.
Tree-SHA512: e31f7f21fe55ac069e755557bdbcae8d5d29e20ff82e441ebdfc65153e3a31a4edd46ad3e6dea5190ecbd1b8ea5a8f94daa5d59a3b7558e46e794e30db0e6c79
fa43e7c2d9 bitcoin-tx: Avoid treating overflow as OP_0 (MarcoFalke)
fa053c0019 style: Fix whitespace in Parse* functions (MarcoFalke)
fa03dec7e9 refactor: Use C++11 range based for loop in ParseScript (MarcoFalke)
fad55e79ca doc: Fixup ToIntegral docs (MarcoFalke)
Pull request description:
Seems odd to treat integer overflow as `OP_0`, so fix that.
ACKs for top commit:
theStack:
re-ACK fa43e7c2d9
shaavan:
ACK fa43e7c2d9
Tree-SHA512: 1bbe2de62d853badc18d57d169c6e78ddcdff037e5a85357995dead11c8e67a4fe35087e08a181c60753f8ce91058b7fcc06f5b7901afedc78fbacea8bc3ef4f
c2fbdca549 Add BECH32_INVALID_VERSION test (lsilva01)
b142f79ddb skip test_getaddressinfo() if wallet is disabled (lsilva01)
Pull request description:
Most of `test/functional/rpc_invalid_address_message.py` does not requires wallet.
But if the project is compiled in disable-wallet mode, the entire test will be skipped.
This PR changes the test to run the RPC tests first and then checks if the wallet is compiled.
ACKs for top commit:
stratospher:
tested ACK c2fbdca
Tree-SHA512: 11fa2fedf4a15aa45e3f12490df8e22290a867d5de594247211499533c32289c68c0b60bd42dbf8305e43dbcc042789e7139317ef5c9f8cf386f2d84c91b9ac2
fa165e9545 Replace stoul with ToIntegral in dbwrapper (MarcoFalke)
Pull request description:
The string is created with `%llu`. See: 7fcf53f7b4/src/leveldb/db/db_impl.cc (L1436-L1437)
So it seems odd to silently accept when parsing: whitespace, a sign character, trailing chars, overflow, ....
Fix that by using the stricter ToIntegral.
ACKs for top commit:
laanwj:
Code review ACK fa165e9545
practicalswift:
cr ACK fa165e9545
theStack:
Code-review ACK fa165e9545
Tree-SHA512: b87f01431ca0b971ff84610022da8679d3c33470b88cfc3f4a337e6e176a0455715588aefd40e8e2bbe7459d902dc89d7bfe34e7fd66755f631cc18dc039fa2f
429b49378e test: introduce script_util helper for creating P2PK scripts (Sebastian Falbesoner)
Pull request description:
This PR is a follow-up to #22363, which took use of already existing `script_util` helpers to get rid of manual CScript for the P2{PKH,SH,WPKH,WSH} output types, in order to increase readability and maintainability of the test code. Here the same is done for P2PK scripts by introducing a helper `key_to_p2pk_script` and using it. Note that the helper only accepts ECDSA pubkeys (i.e. ones with a size of 33 or 65 bytes), hence it can't be used for scripts in the form of [x-only-pubkey, OP_CHECKSIG].
ACKs for top commit:
brunoerg:
Code review ACK 429b49378e
laanwj:
Code review ACK 429b49378e
rajarshimaitra:
Concept + tACK 429b49378e
Tree-SHA512: 984aea01eba5f38a328d69905d90a3a36f0a02419ca3e5baf3c8095895fb094e3780c7da16fad5851db3847bdb05ce8cda244ab09b79b8aa9602dfb3c5e0414c
3b613722f6 Add release notes for fee est with replacement txs (Antoine Poinsot)
4556406562 qa: test fee estimation with replacement transactions (Antoine Poinsot)
053415b297 qa: split run_test into smaller parts (Antoine Poinsot)
06c5ce9714 Re-include RBF replacement txs in fee estimation (Antoine Poinsot)
Pull request description:
This effectively reverts #9519.
RBF is now largely in use on the network (signaled for by around 20% of
all transactions on average) and replacement logic is implemented in
most end-user wallets. The rate of replaced transactions is also
expected to rise as fee-bumping techniques are being developed for
pre-signed transaction ("L2") protocols.
ACKs for top commit:
prayank23:
reACK 3b613722f6
Zero-1729:
re-ACK 3b613722f6
benthecarman:
reACK 3b613722f6
glozow:
ACK 3b613722f6
theStack:
re-ACK 3b613722f6🍪
Tree-SHA512: a6146d15c80ff4ba9249314b0ef953a66a15673e61b8f98979642814f1b169b5695e330e3ee069fa9a7e4d1f8aa10e1dcb7f9aa79181cea5a4c4dbcaf5483023
502f50da12 Test transactions conflicted by double spend in listtransactions (Jon Atack)
Pull request description:
Test the properties of transactions conflicted by a double spend as returned by RPC listtransactions in the abandoned, confirmations, trusted and walletconflicts fields. These fields are also returned by RPCs listsinceblock and gettransactions.
ACKs for top commit:
brunoerg:
tACK 502f50da12
rajarshimaitra:
Concept + tACK 502f50da12
Tree-SHA512: 28968f4a5f1960ea45b2e6f5b20fe25c1b51f66944062dcddea52ea970ad21c74d583793d091b84e8a5e506d6aecc1f0435c5b918213975b22c38e02bba19aa1
fa2ac5881e test: Replace satoshi_round with int() or Decimal() (MarcoFalke)
Pull request description:
satoshi_round will round down. To make the code easier to parse use
Decimal() where possible, which does not round. Or use int(), which
explicitly rounds down.
ACKs for top commit:
lsilva01:
Tested ACK fa2ac5881e on Ubuntu 20.04.
Tree-SHA512: 17795d906aa7652933d43e510e993cdd9cf8926da1febf1c42d463048cb38c92dc518ec08736efe29c0189ffd532b108bc7a715f32b4c2ee58b215df65352eb9
satoshi_round will round down. To make the code easier to parse use
Decimal() where possible, which does not round. Or use int(), which
explicitly rounds down.
