e254ff5d53 Introduce a maximum size for locators. (Gregory Maxwell)
Pull request description:
The largest sensible size for a locator is log in the number of blocks.
But, as noted by Coinr8d on BCT a maximum size message could encode a
hundred thousand locators. If height were used to limit the messages
that could open new attacks where peers on long low diff forks would
get disconnected and end up stuck.
Ideally, nodes first first learn to limit the size of locators they
send before limiting what would be processed, but common implementations
back off with an exponent of 2 and have an implicit limit of 2^32
blocks, so they already cannot produce locators over some size.
Locators are cheap to process so allowing a few more is harmless,
so this sets the maximum to 64-- which is enough for blockchains
with 2^64 blocks before the get overhead starts increasing.
Tree-SHA512: da28df9c46c988980da861046c62e6e7f93d0eaab3083d32e408d1062f45c00316d5e1754127e808c1feb424fa8e00e5a91aea2cc3b80326b71c148696f7cdb3
With watching only inputs, we do not know how large the signatures
for those inputs will be as their signers may not have implemented
71 byte signatures. Thus we estimate their fees using the 72 byte
dummy signature to ensure that we pay enough fees.
This only effects fundrawtransaction when includeWatching is true.
When extra entropy is not specified by the caller, CKey::Sign will
now always create a signature that has a low R value and is at most
70 bytes. The resulting signature on the stack will be 71 bytes when
the sighash byte is included.
Using low R signatures means that the resulting DER encoded signature
will never need to have additional padding to account for high R
values.
The largest sensible size for a locator is log in the number of blocks.
But, as noted by Coinr8d on BCT a maximum size message could encode a
hundred thousand locators. If height were used to limit the messages
that could open new attacks where peers on long low diff forks would
get disconnected and end up stuck.
Ideally, nodes first first learn to limit the size of locators they
send before limiting what would be processed, but common implementations
back off with an exponent of 2 and have an implicit limit of 2^32
blocks, so they already cannot produce locators over some size.
This sets the limit to an absurdly high amount of 101 in order to
maximize compatibility with existing software.
Calls ReloadDbEnv after encrypting the wallet so that the database
environment is flushed, closed, and reopened to prevent unencrypted
keys from being saved on disk.
Adds a ReloadDbEnv function to BerkeleyEnvironment in order to close all Db
instances, closes the environment, resets it, and then reopens
the BerkeleyEnvironment.
Also adds a ReloadDbEnv function to BerkeleyDatabase that calls
BerkeleyEnvironment's ReloadDbEnv.
524b7e36a8 Merge #19: Increase maximum read-only mmap()s used from 1000 to 4096 on 64-bit systems
4874cb8d3e Increase maximum number of read-only mmap()s used from 1000 to 4096 on 64 bit systems.
git-subtree-dir: src/leveldb
git-subtree-split: 524b7e36a8e3bce6fcbcd1b5df09024283f325ba
The test for gettxoutsetinfo in rpc_blockchain.py verifies that the
result is the same as before after invalidating and reconsidering a
block. The comparison has to exclude the 'disk_size' field, though, as
it is not deterministic.
Instead of comparing all the other fields for equality, this change
explicitly removes the 'disk_size' field and then compares the full
objects. This makes the intent more explicit (compare everything except
for disk_size, not compare just a given list of fields) and also the
code simpler.
fa5587fe71 qa: wait_for_verack by default (MarcoFalke)
Pull request description:
This removes the need to do so manually every time a connection is added.
Tree-SHA512: a46c92cb4df41e30778b42b9fd3dcbd8d2d82aa7503d1213cb1c1165034f648d8caee01c292e2d87d05b0f71696996eef5be8a753f35ab49e5f66b0e3bf29f21
faab63111d shutdown: Stop threads before resetting ptrs (MarcoFalke)
Pull request description:
On shutdown some threads would continue to run after or during a pointer reset. This leads to occasional segfaults on shutdown.
Fix this by resetting the smart pointers after all threads that might read from them have been stopped.
This should fix:
* A segfault in the txindex thread, that occurs when the txindex destructor is done, but the thread was not yet stopped (as this is done in the base index destructor)
* A segfault in the scheduler thread, which dereferences conman. (e.g. CheckForStaleTipAndEvictPeers)
Tree-SHA512: abbcf67fadd088e10fe8c384fadfb90bb115d5317145ccb5363603583b320efc18131e46384f55a9bc574969013dfcbd08c49e0d42c004ed7212eca193858ab2
3fc20632a3 qt: Set BLOCK_CHAIN_SIZE = 220 (DrahtBot)
2b6a2f4a28 Regenerate manpages (DrahtBot)
eb7daf4d60 Update copyright headers to 2018 (DrahtBot)
Pull request description:
Some trivial maintenance to avoid having to do it again after the 0.17 branch off.
(The scripts to do this are in `./contrib/`)
Tree-SHA512: 16b2af45e0351b1c691c5311d48025dc6828079e98c2aa2e600dc5910ee8aa01858ca6c356538150dc46fe14c8819ed8ec8e4ec9a0f682b9950dd41bc50518fa
When verifying blocks at startup, the progress is printed in 10%
increments to logs. When -checklevel=4, however, the second half
of the verification (connecting the blocks again) does not log the
progress anymore. (It is still computed and shown in the UI, but
not printed to logs.)
This change makes the behaviour consistent, by adding the missing
progress logging also for level-4 checks.
ParseHashV validates the length and encoding of the string and throws
an informative RPC error on failure, which is as good or better than
these alternative calls.
Note I switched ParseHashV to check string length first, because
IsHex tests that the length is even, and an error like:
"must be of length 64 (not 63, for X)" is much more informative than
"must be hexadecimal string (not X)"
23fbbb100f wallet: sum ancestors rather than taking max in output groups (Karl-Johan Alm)
Pull request description:
This is pointed out in https://github.com/bitcoin/bitcoin/pull/12257#discussion_r204549758.
Basically, the ancestors gives an indication as to how many ancestors the resulting transaction will have, which is more precise when summing up the values, rather than taking the maximum, since all the coins in the group will become ancestors if selected.
Tree-SHA512: 0588c4b6059669650614817e041526a2ab89dda8c07fca8e077c7669dca1fed51cd164f7df56340840ab60285d48f3b140dcee64f64bf696b2dd4ab16d556a13
13bb5cae31 Docs: fix GetWarnings docs to reflect behavior (Ben Woosley)
Pull request description:
In "gui", it returns all warnings, joined by a separator
In "statusbar", it returns the last warning set which seems notionally to be the most important, though that is debatable
Tree-SHA512: 5fc0dc68d143a040b7b893b7176188e2b064c2cf1d559420906e4de636e16e9ab7451a1b87603020a7a8f66d6b94f4ee6c7da2697efad879f9e6de9c0e0c9ac1
faa24441ec policy: Remove promiscuousmempoolflags (MarcoFalke)
Pull request description:
It seems odd to clutter validation code with features that can only ever be used for testing (testnet or regtest). Removing that test-only code makes the mempool logic less painful to understand and easier to reason about when changed or refactored in the future.
Tree-SHA512: 3b897aa9604ac8d82ebe9573c6efd468c93ddaa08d378ebc902e247b7aa6c68fcde71e5b449c08f17a067146cdc66dc50a67ce06d07607c27e5189a49c3fba3f
bcd4b0f5cd Add linting of WalletLogPrintf(...) format strings (practicalswift)
a3e4556949 build: Add format string linter (practicalswift)
Pull request description:
Add format string linter.
This linter checks that the number of arguments passed to each variadic format string function matches the number of format specifiers in the format string.
Example output:
```
$ test/lint/lint-format-strings.sh
src/init.cpp: Expected 2 argument(s) after format string but found 1 argument(s):
LogPrintf("We have a mismatch here: foo=%s bar=%d\n", foo)
src/init.cpp: Expected 1 argument(s) after format string but found 2 argument(s):
LogPrint(BCLog::RPC, "RPC stopped. This is a mismatch: %s\n", s1, s2)
$ echo $?
1
```
Tree-SHA512: 19ab844a63f04bf193d66682ca42745a1c7d6c454b30222491b9fe8dc047054c4a6d3ee7921ec0676fb9ca2e7f6f93bd6c97996fb09667269bd491cb875349f3
93de2891fa wallet: assert to ensure accuracy of CMerkleTx::GetBlocksToMaturity (Ben Woosley)
Pull request description:
According to my understanding, it should not be possible for coinbase
transactions to be conflicting, thus it should not be possible for
GetDepthInMainChain to return a negative result. If it did, this would
also result in innacurate results for GetBlocksToMaturity due to the
math therein. asserting ensures accuracy.
Tree-SHA512: 8e71c26f09fe457cfb00c362ca27066f7f018ea2af1f395090fdc7fd9f5964b76f4317c23f7a4923776f00087558511da5c1c368095be39fb1bacc614a93c32f
This linter checks that the number of arguments passed to each variadic format
string function matches the number of format specifiers in the format string.
a9e898a4ad docs: Link to python style guidelines from developer notes (Mason Simon)
Pull request description:
Initially I moved the python style guidelines from the functional test README, but some of the python rules are test-specific, and most of the developer notes doc is C++ centric, so just dropping a link seemed better.
Tree-SHA512: 9d4d5cc45526319a118595d90fcfad2c9aced22007aa096d8af04ba1b963312822804f4c15b0b227d66af49565034437691b7760e7ff6d1e3f8b10b898906362
a1a998cf24 wallet: Fix backupwallet for multiwallets (Daniel Kraft)
Pull request description:
`backupwallet` was broken for multiwallets in their own directories (i.e. something like `DATADIR/wallets/mywallet/wallet.dat`). In this case, the backup would use `DATADIR/wallets/wallet.dat` as source file and not take the specific wallet's directory into account.
This led to either an error during the backup (if the wrong source file was not present) or would silently back up the wrong wallet; especially the latter behaviour can be quite bad for users.
Tree-SHA512: 7efe2450ca047e40719fcc7cc211ed94699056020ac737cada7b59e8240298675960570c45079add424d0aab520437d5050d956acd695a9c2452dd4317b4d2c4
