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2014-06-27Relay double-spends, subject to anti-DOSTom Harding
Allows network wallets and other clients to see transactions that respend a prevout already spent in an unconfirmed transaction in this node's mempool. Knowledge of an attempted double-spend is of interest to recipients of the first spend. In some cases, it will allow these recipients to withhold goods or services upon being alerted of a double-spend that deprives them of payment. As before, respends are not added to the mempool. Anti-Denial-of-Service-Attack provisions: - Use a bloom filter to relay only one respend per mempool prevout - Rate-limit respend relays to a default of 100 thousand bytes/minute - Define tx2.IsEquivalentTo(tx1): equality when scriptSigs are not considered - Do not relay these equivalent transactions Remove an unused variable declaration in txmempool.cpp.
2014-06-27Merge pull request #4365 from gavinandresen/relax_isstandardGavin Andresen
Relax IsStandard rules for pay-to-script-hash transactions
2014-06-26JSON-RPC method: prioritisetransaction <txid> <priority delta> <priority tx fee>Luke Dashjr
Accepts the transaction into mined blocks at a higher (or lower) priority
2014-06-23Refactor proof of work related functions out of mainjtimon
2014-06-23Relax IsStandard rules for pay-to-script-hash transactionsGavin Andresen
Relax the AreInputsStandard() tests for P2SH transactions -- allow any Script in a P2SH transaction to be relayed/mined, as long as it has 15 or fewer signature operations. Rationale: https://gist.github.com/gavinandresen/88be40c141bc67acb247 I don't have an easy way to test this, but the code changes are straightforward and I've updated the AreInputsStandard unit tests.
2014-06-22Code simplifications after CTransaction::GetHash() cachingPieter Wuille
2014-06-19Merge pull request #4310Wladimir J. van der Laan
7a9e0b6 Move checkpoint based heuristic checks to AcceptBlockHeader (Pieter Wuille)
2014-06-12Merge pull request #2784Wladimir J. van der Laan
f1920e8 Ping automatically every 2 minutes (unconditionally) (Pieter Wuille)
2014-06-10small formatting, indentation and comment fixesPhilip Kaufmann
- contains zero code changes
2014-06-09Ping automatically every 2 minutes (unconditionally)Pieter Wuille
... instead of after 30 minutes of no sending, for latency measurement and keep-alive. Also, disconnect if no reply arrives within 20 minutes, instead of 90 of inactivity (for peers supporting the 'pong' message).
2014-06-09Merge pull request #3824Wladimir J. van der Laan
f0a83fc Use Params().NetworkID() instead of TestNet() from the payment protocol (jtimon) 2871889 net.h was using std namespace through chainparams.h included in protocol.h (jtimon) c8c52de Replace virtual methods with static attributes, chainparams.h depends on protocol.h instead of the other way around (jtimon) a3d946e Get rid of TestNet() (jtimon) 6fc0fa6 Add RPCisTestNet chain parameter (jtimon) cfeb823 Add RequireStandard chain parameter (jtimon) 21913a9 Add AllowMinDifficultyBlocks chain parameter (jtimon) d754f34 Move majority constants to chainparams (jtimon) 8d26721 Get rid of RegTest() (jtimon) cb9bd83 Add DefaultCheckMemPool chain parameter (jtimon) 2595b9a Add DefaultMinerThreads chain parameter (jtimon) bfa9a1a Add MineBlocksOnDemand chain parameter (jtimon) 1712adb Add MiningRequiresPeers chain parameter (jtimon)
2014-06-09Push cs_mains down in ProcessBlockPieter Wuille
2014-06-09Move all post-chaintip-change notifications to ActivateBestChainPieter Wuille
2014-06-09Allow ActivateBestChain to release its lock on cs_mainPieter Wuille
2014-06-09Get rid of the static chainMostWork (optimization)Pieter Wuille
2014-06-09Move checkpoint based heuristic checks to AcceptBlockHeaderPieter Wuille
2014-06-06estimatefee / estimatepriority RPC methodsGavin Andresen
New RPC methods: return an estimate of the fee (or priority) a transaction needs to be likely to confirm in a given number of blocks. Mike Hearn created the first version of this method for estimating fees. It works as follows: For transactions that took 1 to N (I picked N=25) blocks to confirm, keep N buckets with at most 100 entries in each recording the fees-per-kilobyte paid by those transactions. (separate buckets are kept for transactions that confirmed because they are high-priority) The buckets are filled as blocks are found, and are saved/restored in a new fee_estiamtes.dat file in the data directory. A few variations on Mike's initial scheme: To estimate the fee needed for a transaction to confirm in X buckets, all of the samples in all of the buckets are used and a median of all of the data is used to make the estimate. For example, imagine 25 buckets each containing the full 100 entries. Those 2,500 samples are sorted, and the estimate of the fee needed to confirm in the very next block is the 50'th-highest-fee-entry in that sorted list; the estimate of the fee needed to confirm in the next two blocks is the 150'th-highest-fee-entry, etc. That algorithm has the nice property that estimates of how much fee you need to pay to get confirmed in block N will always be greater than or equal to the estimate for block N+1. It would clearly be wrong to say "pay 11 uBTC and you'll get confirmed in 3 blocks, but pay 12 uBTC and it will take LONGER". A single block will not contribute more than 10 entries to any one bucket, so a single miner and a large block cannot overwhelm the estimates.
2014-06-06Type-safe CFeeRate classGavin Andresen
Use CFeeRate instead of an int64_t for quantities that are fee-per-size. Helps prevent unit-conversion mismatches between the wallet, relaying, and mining code.
2014-06-04Merge pull request #4287 from laanwj/2014_06_sideeffectGavin Andresen
Remove side effect in assertion in ProcessGetData
2014-06-04Merge pull request #4247 from Diapolo/listenJeff Garzik
rename fNoListen to fListen and move to net
2014-06-04Merge pull request #4258Wladimir J. van der Laan
7b45d94 Make max number of orphan blocks kept in memory a startup parameter (fixes #4253) (shshshsh)
2014-06-04Remove side effect in assertion in ProcessGetDataWladimir J. van der Laan
A side-effect was introduced into an assertion in 7a0e84d. This commit fixes that.
2014-06-04Make max number of orphan blocks kept in memory a startup parameter (fixes ↵shshshsh
#4253)
2014-06-04Add RequireStandard chain parameterjtimon
2014-06-04Add AllowMinDifficultyBlocks chain parameterjtimon
2014-06-04Move majority constants to chainparamsjtimon
2014-06-03VerifyDB progressCozz Lovan
2014-05-29rename fNoListen to fListen and move to netPhilip Kaufmann
- better code readability and it belongs to net - this is a prerequisite for a pull to add -listen to the GUI
2014-05-25Merge pull request #4183Wladimir J. van der Laan
f40dbee remove CPubKey::VerifyCompact( ) which is never used (Kamil Domanski) 28b6c1d remove GetMedianTime( ) which is never used (Kamil Domanski) 5bd4adc remove LookupHostNumeric( ) which is never used (Kamil Domanski) 595f691 remove LogException( ) which is never used (Kamil Domanski) f4057cb remove CTransaction::IsNewerThan which is never used (Kamil Domanski) 0e31e56 remove CWallet::AddReserveKey which is never used (Kamil Domanski)
2014-05-20Add missing LOCK(cs_main)Pieter Wuille
2014-05-20remove GetMedianTime( ) which is never usedKamil Domanski
2014-05-20Merge pull request #4199Wladimir J. van der Laan
0a59723 Remove extraneous c_str (R E Broadley)
2014-05-20Remove extraneous c_strR E Broadley
2014-05-19Merge pull request #4173Wladimir J. van der Laan
8c93bf4 LoadBlockIndexDB(): Require block db reindex if any blk*.dat files are missing. (Ashley Holman) 7a0e84d ProcessGetData(): abort if a block file is missing from disk (Ashley Holman)
2014-05-12LoadBlockIndexDB(): Require block db reindex if any blk*.dat files are missing.Ashley Holman
2014-05-12Merge pull request #4138Wladimir J. van der Laan
783b182 Remove dummy PRIszX macros for formatting (Wladimir J. van der Laan)
2014-05-11ProcessGetData(): abort if a block file is missing from diskAshley Holman
2014-05-09Merge pull request #4076Wladimir J. van der Laan
397668e Deduplicate uint* comparison operator logic (Pieter Wuille) df9eb5e Move {Get,Set}Compact from bignum to uint256 (Pieter Wuille) a703150 Add multiplication and division to uint160/uint256 (Pieter Wuille) 4d480c8 Exception instead of assigning 0 in case of wrong vector length (Pieter Wuille) eb2cbd7 Deduplicate shared code between uint160 and uint256 (Pieter Wuille)
2014-05-09Merge pull request #4134Wladimir J. van der Laan
aa250f0 Remove NumBlocksOfPeers (Wladimir J. van der Laan)
2014-05-09Move {Get,Set}Compact from bignum to uint256Pieter Wuille
2014-05-09Merge pull request #3843Wladimir J. van der Laan
787ee0c Check redeemScript size does not exceed 520 byte limit (Peter Todd) 4d79098 Increase IsStandard() scriptSig length (Peter Todd) f80cffa Do not trigger a DoS ban if SCRIPT_VERIFY_NULLDUMMY fails (Peter Todd) 6380180 Add rejection of non-null CHECKMULTISIG dummy values (Peter Todd) 29c1749 Let tx (in)valid tests use any SCRIPT_VERIFY flag (Peter Todd) 68f7d1d Create (MANDATORY|STANDARD)_SCRIPT_VERIFY_FLAGS constants (Peter Todd)
2014-05-09Merge pull request #3884Wladimir J. van der Laan
942b33a Split AcceptBlockHeader from AcceptBlock. (Pieter Wuille) f457347 Split up CheckBlock in a block and header version (Pieter Wuille)
2014-05-08Increase IsStandard() scriptSig lengthPeter Todd
Removes the limits on number of pubkeys for P2SH CHECKMULTISIG outputs. Previously with the 500 byte scriptSig limit there were odd restrictions where even a 1-of-12 P2SH could be spent in a standard transaction(1), yet multisig scriptPubKey's requiring more signatures quickly ran out of scriptSig space. From a "stuff-data-in-the-blockchain" point of view not much has changed as with the prior commit now only allowing the dummy value to be null the newly allowed scriptSig space can only be used for signatures. In any case, just using more outputs is trivial and doesn't cost much. 1) See 779b519480d8c5346de6e635119c7ee772e97ec872240c45e558f582a37b4b73 Mined by BTC Guild.
2014-05-08Do not trigger a DoS ban if SCRIPT_VERIFY_NULLDUMMY failsPeter Todd
2014-05-07Add missing cs_main lock to VerifyDBWladimir J. van der Laan
Fixes issue #4139.
2014-05-06Remove dummy PRIszX macros for formattingWladimir J. van der Laan
Size specifiers are no longer needed now that we use typesafe tinyformat for string formatting, instead of the system's sprintf. No functional changes. This continues the work in #3735.
2014-05-06Remove NumBlocksOfPeersWladimir J. van der Laan
Generally useless information. Only updates on connect time, not after that. Peers can easily lie and the median filter is not effective in preventing that. In the past it was used for progress display in the GUI but `CheckPoints::guessVerificationProgress` provides a better way that is now used. It was too easy to mislead it. Peers do lie about it in practice, see issue #4065. From the RPC, `getpeerinfo` gives the peer raw values, which are more useful.
2014-05-05Create (MANDATORY|STANDARD)_SCRIPT_VERIFY_FLAGS constantsPeter Todd
2014-05-01Merge pull request #4109Wladimir J. van der Laan
6b29ccc Correct indentation (R E Broadley)
2014-04-30use standard __func__ instead of __PRETTY_FUNCTION__Philip Kaufmann