169afafd50
* Fix duplicate headers download in initial sync Now that initial block download is delayed until the headers sync is done, it was noticed that the initial headers sync may happen multiple times in parallel in the case new blocks are announced. This happens because for every block in INV that is received, a getheaders message is immediately sent out resulting in a full download of the headers chain starting from the point of where the initial headers sync is currently at. This happens once for each peer that announces the new block. This slows down the initial headers sync and increases the chance of another block being announced before it is finished, probably leading to the same behavior as already described, slowing down the sync even more...and so on. This commit delays sending of GETHEADERS to later in case the chain is too far behind while a new block gets announced. Header chains will still be downloaded multiple times, but the downloading will start much closer to the tip of the chain, so the damage is not that bad anymore. This ensures that we get all headers from all peers, even if any of them is on another chain. This should avoid what happened in https://github.com/bitcoin/bitcoin/pull/8054 which needed to be reverted later. This fixes the Bitcoin issue https://github.com/bitcoin/bitcoin/issues/6755 * Introduce DelayGetHeadersTime chain param and fix tests The delaying of GETHEADERS in combination with very old block times in test cases resulted in the delaying being triggered when the first newly mined block arrives. This results in a completely stalled sync. This is fixed by avoiding delaying in when running tests. * Disconnect peers which are not catched up Peers which stop sending us headers too early are very likely peers which did not catch up before and stalled for some reason. We should disconnect these peers and chose another one to continue.
131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CHAINPARAMS_H
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#define BITCOIN_CHAINPARAMS_H
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#include "chainparamsbase.h"
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#include "consensus/params.h"
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#include "primitives/block.h"
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#include "protocol.h"
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#include <vector>
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struct CDNSSeedData {
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std::string name, host;
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CDNSSeedData(const std::string &strName, const std::string &strHost) : name(strName), host(strHost) {}
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};
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struct SeedSpec6 {
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uint8_t addr[16];
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uint16_t port;
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};
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typedef std::map<int, uint256> MapCheckpoints;
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struct CCheckpointData {
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MapCheckpoints mapCheckpoints;
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int64_t nTimeLastCheckpoint;
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int64_t nTransactionsLastCheckpoint;
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double fTransactionsPerDay;
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};
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/**
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* CChainParams defines various tweakable parameters of a given instance of the
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* Dash system. There are three: the main network on which people trade goods
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* and services, the public test network which gets reset from time to time and
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* a regression test mode which is intended for private networks only. It has
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* minimal difficulty to ensure that blocks can be found instantly.
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*/
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class CChainParams
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{
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public:
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enum Base58Type {
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PUBKEY_ADDRESS,
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SCRIPT_ADDRESS,
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SECRET_KEY, // BIP16
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EXT_PUBLIC_KEY, // BIP32
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EXT_SECRET_KEY, // BIP32
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MAX_BASE58_TYPES
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};
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const Consensus::Params& GetConsensus() const { return consensus; }
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const CMessageHeader::MessageStartChars& MessageStart() const { return pchMessageStart; }
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const std::vector<unsigned char>& AlertKey() const { return vAlertPubKey; }
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int GetDefaultPort() const { return nDefaultPort; }
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const CBlock& GenesisBlock() const { return genesis; }
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/** Make miner wait to have peers to avoid wasting work */
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bool MiningRequiresPeers() const { return fMiningRequiresPeers; }
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/** Default value for -checkmempool and -checkblockindex argument */
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bool DefaultConsistencyChecks() const { return fDefaultConsistencyChecks; }
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/** Policy: Filter transactions that do not match well-defined patterns */
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bool RequireStandard() const { return fRequireStandard; }
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int64_t MaxTipAge() const { return nMaxTipAge; }
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int64_t DelayGetHeadersTime() const { return nDelayGetHeadersTime; }
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uint64_t PruneAfterHeight() const { return nPruneAfterHeight; }
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/** Make miner stop after a block is found. In RPC, don't return until nGenProcLimit blocks are generated */
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bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; }
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/** In the future use NetworkIDString() for RPC fields */
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bool TestnetToBeDeprecatedFieldRPC() const { return fTestnetToBeDeprecatedFieldRPC; }
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/** Return the BIP70 network string (main, test or regtest) */
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std::string NetworkIDString() const { return strNetworkID; }
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const std::vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; }
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const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
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int ExtCoinType() const { return nExtCoinType; }
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const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; }
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const CCheckpointData& Checkpoints() const { return checkpointData; }
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int PoolMaxTransactions() const { return nPoolMaxTransactions; }
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int FulfilledRequestExpireTime() const { return nFulfilledRequestExpireTime; }
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std::string SporkPubKey() const { return strSporkPubKey; }
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protected:
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CChainParams() {}
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Consensus::Params consensus;
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CMessageHeader::MessageStartChars pchMessageStart;
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//! Raw pub key bytes for the broadcast alert signing key.
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std::vector<unsigned char> vAlertPubKey;
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int nDefaultPort;
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long nMaxTipAge;
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int64_t nDelayGetHeadersTime;
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uint64_t nPruneAfterHeight;
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std::vector<CDNSSeedData> vSeeds;
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std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
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int nExtCoinType;
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std::string strNetworkID;
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CBlock genesis;
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std::vector<SeedSpec6> vFixedSeeds;
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bool fMiningRequiresPeers;
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bool fDefaultConsistencyChecks;
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bool fRequireStandard;
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bool fMineBlocksOnDemand;
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bool fTestnetToBeDeprecatedFieldRPC;
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CCheckpointData checkpointData;
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int nPoolMaxTransactions;
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int nFulfilledRequestExpireTime;
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std::string strSporkPubKey;
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std::string strMasternodePaymentsPubKey;
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};
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/**
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* Return the currently selected parameters. This won't change after app
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* startup, except for unit tests.
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*/
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const CChainParams &Params();
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/**
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* @returns CChainParams for the given BIP70 chain name.
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*/
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CChainParams& Params(const std::string& chain);
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/**
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* Sets the params returned by Params() to those for the given BIP70 chain name.
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* @throws std::runtime_error when the chain is not supported.
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*/
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void SelectParams(const std::string& chain);
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#endif // BITCOIN_CHAINPARAMS_H
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