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constraints
Transactions are not allowed in the memory pool or selected for inclusion in a block until their lock times exceed chainActive.Tip()->GetMedianTimePast(). However blocks including transactions which are only mature under the old rules are still accepted; this is *not* the soft-fork required to actually rely on the new constraint in production.
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lock-time calculations
The lock-time code currently uses CBlock::nTime as the cutoff point for time based locked transactions. This has the unfortunate outcome of creating a perverse incentive for miners to lie about the time of a block in order to collect more fees by including transactions that by wall clock determination have not yet matured. By using CBlockIndex::GetMedianTimePast from the prior block instead, the self-interested miner no longer gains from generating blocks with fraudulent timestamps. Users can compensate for this change by simply adding an hour (3600 seconds) to their time-based lock times.
If enforced, this would be a soft-fork change. This commit only adds the functionality on an unexecuted code path, without changing the behaviour of Bitcoin Core.
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d3b09f6 Do not allow blockfile pruning during reindex. (Alex Morcos)
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- Add developer notes about `.gitignore.`
- Remove qt creator specific files from gitignore, to be consistent.
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65ef372 Add BIP65 to getblockchaininfo softforks list (Peter Todd)
cde7ab2 Add RPC tests for the CHECKLOCKTIMEVERIFY (BIP65) soft-fork (Peter Todd)
287f54f Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic (Peter Todd)
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212bcca Add optional locktime to createrawtransaction (Tom Harding)
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b48da5c script: Remove magic numbers (David Hill)
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8c15f33 [trivial] Update contrib/devtools/README.md (MarcoFalke)
338f62f [devtools] add clang-format.py (MarcoFalke)
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a4e28b3 Set TCP_NODELAY on P2P sockets. (Gregory Maxwell)
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upstream commit 1e80063123b47b97d25dfeded8dd92a19dafab66
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Also, trim trailing whitespace.
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Nagle appears to be a significant contributor to latency now that the static
sleeps are gone. Most of our messages are relatively large compared to
IP + TCP so I do not expect this to create enormous overhead.
This may also reduce traffic burstyness somewhat.
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c6824f8 Add DERSIG transaction test cases (J Ross Nicoll)
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3cb56f3 *: alias -h for --help (Daniel Cousens)
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c.f #6748
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579b863 devtools: Add security-check.py (Wladimir J. van der Laan)
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Perform the following ELF security checks:
- PIE: Check for position independent executable (PIE), allowing for address space randomization
- NX: Check that no sections are writable and executable (including the stack)
- RELRO: Check for read-only relocations, binding at startup
- Canary: Check for use of stack canary
Also add a check to symbol-check.py that checks that only the subset of
allowed libraries is imported (to avoid incompatibilities).
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41db8c4 http: Restrict maximum size of request line + headers (Wladimir J. van der Laan)
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58254aa Fix stale comment in CTxMemPool::TrimToSize. (Matt Corallo)
2bc5018 Fix comment formatting tabs (Matt Corallo)
8abe0f5 Undo GetMinFee-requires-extra-call-to-hit-0 (Matt Corallo)
9e93640 Drop minRelayTxFee to 1000 (Matt Corallo)
074cb15 Add reasonable test case for mempool trimming (Matt Corallo)
d355cf4 Only call TrimToSize once per reorg/blocks disconnect (Matt Corallo)
794a8ce Implement on-the-fly mempool size limitation. (Matt Corallo)
e6c7b36 Print mempool size in KB when adding txn (Matt Corallo)
241d607 Add CFeeRate += operator (Matt Corallo)
e8bcdce Track (and define) ::minRelayTxFee in CTxMemPool (Matt Corallo)
9c9b66f Fix calling mempool directly, instead of pool, in ATMP (Matt Corallo)
49b6fd5 Add Mempool Expire function to remove old transactions (Pieter Wuille)
78b82f4 Reverse the sort on the mempool's feerate index (Suhas Daftuar)
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c7b36cc Change URLs to https in debian/control (Matt Corallo)
e253e83 Update debian/changelog and slight tweak to debian/control (Matt Corallo)
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55a8975 Chainparams: Translations: DRY: options and error strings (Jorge Timón)
f3525e2 Chainparams: Replace CBaseChainParams::Network enum with string constants (suggested by Wladimir) (Jorge Timón)
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Prevent memory exhaustion by sending lots of data.
Also add a test to `httpbasics.py`.
Closes #6425
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Also remove SelectBaseParamsFromCommandLine and SelectParamsFromCommandLine
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(suggested by Wladimir)
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b6d5e32 Make fee aware of min relay in pruning.py RPC test (Alex Morcos)
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e76d9e4 [depends] Latest config.guess and config.sub (fanquake)
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bd4c22e [rpc-tests] Check return code (MarcoFalke)
0d8b175 [rpc-tests] fundrawtransaction: Update fee after minRelayTxFee increase (MarcoFalke)
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7801f43 Added fPowNoRetargeting field to Consensus::Params that disables nBits recalculation. (Eric Lombrozo)
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53b86d0 doc: add comment explaining initial header request (Daniel Kraft)
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Also clarify startup message.
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recalculation.
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bfcdc21 build: make sure OpenSSL heeds noexecstack (Wladimir J. van der Laan)
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0658d0b temporarily comment out rpcbind.py (Alex Morcos)
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This passes `-Wa,--noexecstack` to the assembler when building
platform-specific assembly files, to signal that a non-executable stack
can be used. This is the same approach as used by Debian
(see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=430583)
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99963b9 Correct spelling mistakes in doc folder (Mitchell Cash)
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d2e3fbc Mention PHP bindings to libbitcoinconsensus (Thomas Kerin)
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Add test cases for DERSIG flag enforcement against transactions.
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