This clarifies a bit more the ways in which the new script execution
cache could break consensus in the future if additional data from
the CCoins object were to be used as a part of script execution.
After this change, any such consensus breaks should be very visible
to reviewers, hopefully ensuring no such changes can be made.
The new functions are:
* CCoinsViewCache::AddCoin: Add a single COutPoint/Coin pair.
* CCoinsViewCache::SpendCoin: Remove a single COutPoint.
* AddCoins: utility function that invokes CCoinsViewCache::AddCoin for
each output in a CTransaction.
* AccessByTxid: utility function that searches for any output with
a given txid.
* CCoinsViewCache::AccessCoin: retrieve the Coin for a COutPoint.
* CCoinsViewCache::HaveCoins: check whether a non-empty Coin exists
for a given COutPoint.
The AddCoin and SpendCoin methods will eventually replace ModifyCoins
and ModifyNewCoins, AddCoins will replace CCoins::FromTx, and the new
AccessCoins and HaveCoins functions will replace their per-txid
counterparts.
Note that AccessCoin for now returns a copy of the Coin object. In a
later commit it will be change to returning a const reference (which
keeps working in all call sites).
The earlier CTxInUndo class now holds the same information as the Coin
class. Instead of duplicating functionality, replace CTxInUndo with a
serialization adapter for Coin.
6d7104c99 [Qt] make sure transaction table entry gets updated after bump (Jonas Schnelli)
32325a3f5 [Qt] hide bump context menu action if tx already has been bumped (Jonas Schnelli)
Tree-SHA512: d3e5991145879b7f6b212d9d9c6f423609dc8e6fa7f6feb7df931691f1dec2acb6ab162c2fb7e758d3ca3f3fb14363df2f50f0e83e83068da5cc7e6de35e69d2
b6fbfc2 net: only enforce the services required to connect (Cory Fields)
Tree-SHA512: 88943bff63213a734f3c96c45760cadaeb9ba18287c8a20c279851ebaf058a334c969028fb2180f155508e3eea4b838147382e4f2b655e7a9aa098eadc81d53e
cd5622d Make bitcoind invalid argument error message specific (Wladimir J. van der Laan)
Tree-SHA512: 78999b9359685c4090f9a112e1d02bdddac22173f5f04600773b042acb9481ebb54d0f73d9d6d74249f845f497927a58d59de69bf33e3dccf096c3c80c7ebf6b
Previously, transaction metadata (height, coinbase or not, and before
the previous commit also nVersion) was only stored for undo records
that correspond to the last output of a transaction being spent.
This only saves 2 bytes per undo record. Change this to storing this
information for every undo record, and stop complaining for having it
in non-last output spends. This means that undo dat written with
this patch won't be readable by older versions anymore.
This makes the following changes:
* In undo data and the chainstate database, the transaction nVersion
field is removed from the data structures, always written as 0, and
ignored when reading.
* The definition of hash_serialized in gettxoutsetinfo is changed to no
longer incude the nVersion field. It is renamed to hash_serialized_2
to avoid confusion. The new definition also includes transaction
height and coinbase information, as this information was missing
before.
This depends on having a CHashVerifier-based undo data checksum
verifier.
Apart from changing the definition of serialized_hash, downgrading
after using this patch is supported, as no release ever used the value
of nVersion field in UTXO entries.
This is necessary later, when we drop the nVersion field from the undo
data. At that point deserializing and reserializing the data won't
roundtrip anymore, and thus that approach can't be used to verify
checksums anymore.
With this CHashVerifier approach, we can deserialize while hashing the
exact serialized form that was used. This is both more efficient and
more correct in that case.
The error() function unconditionally reports an error. It should only
be used for actually exception situations, and not for the type of
inconsistencies that ApplyTxInUndo/DisconnectBlock can graciously deal
with.
This also makes a subtle semantics change: in ApplyTxInUndo, when a
record with metadata is encountered (indicating it is the last spend
from a tx), don't wipe the CCoins record if it wasn't empty at that
point. This makes sure that UTXO operations never affect any other
UTXOs (including those from the same tx).
513da90cd Add test for empty chain and reorg consistency for gettxoutsetinfo. (Gregory Maxwell)
822755a42 Fix: make CCoinsViewDbCursor::Seek work for missing keys (Pieter Wuille)
Tree-SHA512: e549921e8b8f599bf61ebe0ee7ef1d2f474043723d633e24665fe434b996a98e039612de8a1c2cd16b63f154943ff5ea1c1935e9561cfb813a00d47d926d0b22
No change in behavior. Get rid of specifiedConfirmTarget if/else block and
rename specifiedConfirmTarget and ignoreUserSetFee variables to
ignoreGlobalPayTxFee.
The current message is not helpful. Hardly anyone even remembers that
bitcoind used to be a cli utility, let alone new users. Print what the
actual problem is.
211adc0 Use range-based for loops (C++11) when looping over vector elements (practicalswift)
Tree-SHA512: 0e007f20dcef99d3c7a1036265e00f689d69f42e02fd82dd8389f45b52d31947e5f9388de2610d3d9bd9f554915ce0d35ebce561e5ae3a9013956d0ee4937145
5844609 [net] Avoid initialization to a value that is never read (practicalswift)
Tree-SHA512: 068c3fba58034187f546688bc9b8b7317e0657e797850613fb6289a4efc28637e4d06a0fa5e57480538c6b8340ed6d6a6c6f9a96f130b698d5d60975490a03d8
A few code changes were needed to accompany the test:
* Adding setObjectName() calls for a few Qt controls to make them easily
accessible from the test.
* Calling contextMenu->popup() instead of contextMenu->exec() to open
the transaction list context menu without blocking the test thread.
* Opening the context menu at the contextualMenu event point rather than
the cursor position (this change was not strictly needed to make the test
work, but is more correct).
* Updating the bumped transaction row with showTransaction=true instead of
false. This is needed to prevent the bumped tx from being hidden, so the last
part of the test which attempts to bump the bumped tx can work. (Technically
this change is a more general bugfix not limited to the testing environment,
but the bug doesn't happen outside of the testing environment because in the
full Qt client, a queued NotifyTransactionChanged notification causes the row
to be updated twice, first with showTransaction=false, then immediately after
with showTransaction=true.)
888cce5 Add perf counter data to GetStrongRandBytes state in scheduler (Matt Corallo)
399fb8f Add internal method to add new random data to our internal RNG state (Matt Corallo)
Tree-SHA512: 9732a3804d015eaf48d56b60c73880014845fd17a098f1ac2eff6bd50a4beb8b8be65956ac1f0d641e96e3a53c17daddd919401edbf2e3797c3fb687730fb913
```
$ git blame src/policy/fees.cpp | grep becuase
3810e976 (2017-03-07 11:33:44 -0500 789) * checks for 2*target becuase we are taking the max over all time
$ git blame src/policy/fees.h | grep successfullly
2d2e1705 (2017-04-12 12:29:03 -0400 54) * representing that a tx was successfullly confirmed in less than or equal to
$ git blame src/wallet/feebumper.cpp | grep "hasen't"
a3878374 (2017-05-11 09:34:39 +0200 258) // make sure the transaction still has no descendants and hasen't been mined in the meantime
```
693247b [test] Speed up fuzzing by ~200x when using afl-fuzz (practicalswift)
Tree-SHA512: 95922fc2616b8cb00dd531ed1140a52bbda4e04292dd8c1c60a8f49dbf6ccb797a18b61180b3fb68d695456b478a1f5ae7fda47e8ecee41dd65555487aef40a3
43c5877 Prevent shadowing the global dustRelayFee. (Pavel Janík)
Tree-SHA512: 9765931a7753c484990003396afd0bb65a53f42d1cad9502017720618ce90b3c5ae68591db01e3524adecdbe6925a5eeeebf04012ba644ef3b65073af207ae5d
Previously if we didn't have any local addresses, GetLocalAddress would return
0.0.0.0 and then we'd swap in a peer's notion of our address in AdvertiseLocal,
but then nServices would never get set.
a38783747 Make sure we re-check the conditions of a feebump during commit (Jonas Schnelli)
9b9ca538c Only update the transactionrecord if the fee bump has been commited (Jonas Schnelli)
6ed4368f1 Make sure we use nTxConfirmTarget during Qt fee bumps (Jonas Schnelli)
be08fc39d Make sure we always update the table row after a bumpfee call (Jonas Schnelli)
2678d3dc6 Show old-fee, increase a new-fee in Qt fee bumper confirmation dialog (Jonas Schnelli)
2ec911f60 Add cs_wallet lock assertion to SignTransaction() (Jonas Schnelli)
fbf385cc8 [Qt] simple fee bumper with user verification (Jonas Schnelli)
Tree-SHA512: a3ce626201abf64cee496dd1d83870de51ba633de40c48eb0219c3eba5085c038af34c284512130d2544de20c1bff9fea1b78f92e3574c21dd4e96c11b8e7d76
38bc1ec Make more json-like output from estimaterawfee (Alex Morcos)
2d2e170 Comments and improved documentation (Alex Morcos)
ef589f8 minor cleanup: remove unnecessary variable (Alex Morcos)
3ee76d6 Introduce a scale factor (Alex Morcos)
5f1f0c6 Historical block span (Alex Morcos)
aa19b8e Clean up fee estimate debug printing (Alex Morcos)
10f7cbd Track first recorded height (Alex Morcos)
3810e97 Rewrite estimateSmartFee (Alex Morcos)
c7447ec Track failures in fee estimation. (Alex Morcos)
4186d3f Expose estimaterawfee (Alex Morcos)
2681153 minor refactor: explicitly track start of new bucket range and don't update curNearBucket on final loop. (Alex Morcos)
1ba43cc Make EstimateMedianVal smarter about small failures. (Alex Morcos)
d3e30bc Refactor to update moving average on fly (Alex Morcos)
e5007ba Change parameters for fee estimation and estimates on all 3 time horizons. (Alex Morcos)
c0a273f Change file format for fee estimates. (Alex Morcos)
Tree-SHA512: 186e7508d86a1f351bb656edcd84ee9091f5f2706331eda9ee29da9c8eb5bf67b8c1f2abf6662835560e7f613b1377099054f20767f41ddcdbc89c4f9e78946d
65d484a Output line to debug.log when IsInitialBlockDownload latches to false (Alex Morcos)
Tree-SHA512: 8b9d1377167a78ea55afc4582c8b9305c8b0fe56063a25920e9d45ea9335470314e3cfdc92e78b803d304476fa4c19b228fea1758bbeadd20c719006d814b5f2
Motivation for moving these is to make supporting IPC simpler (#10102), so
these lookups can be one-shot IPC requests, instead of back-and-forth
interactions over the IPC channel.
Also these functions are potentially useful outside of the bitcoin GUI (e.g.
for RPCs).
2f84cf6 tests: Correct testcase in script_tests.json for large number OP_EQUAL (Wladimir J. van der Laan)
Tree-SHA512: 3a4d33c7d65ea40f25e2f5f2dfab8b0262cac8a7c33698eef8332ca5ec4a6f88f73fc51441892b49ffa85660be5037644430585f2eab76e257d544f9c2271ab7
Start importwallet rescans at the first block with timestamp greater or equal
to the wallet birthday instead of the last block with timestamp less or equal.
This fixes an edge case bug where importwallet could fail to start the rescan
early enough if there are blocks with decreasing timestamps or multiple blocks
with the same timestamp.
