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chainparams.h
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CHAINPARAMS_H
#define BITCOIN_CHAINPARAMS_H
#include <chainparamsbase.h>
#include <consensus/params.h>
#include <primitives/block.h>
#include <protocol.h>
#include <memory>
#include <vector>
struct SeedSpec6 {
uint8_t addr[16];
uint16_t port;
};
typedef std::map<int, BlockHash> MapCheckpoints;
struct CCheckpointData {
MapCheckpoints mapCheckpoints;
};
/**
* Holds various statistics on transactions within a chain. Used to estimate
* verification progress during chain sync.
*
* See also: CChainParams::TxData, GuessVerificationProgress.
*/
struct ChainTxData {
int64_t nTime;
int64_t nTxCount;
double dTxRate;
};
/**
* CChainParams defines various tweakable parameters of a given instance of the
* Bitcoin system. There are three: the main network on which people trade goods
* and services, the public test network which gets reset from time to time and
* a regression test mode which is intended for private networks only. It has
* minimal difficulty to ensure that blocks can be found instantly.
*/
class CChainParams {
public:
enum Base58Type {
PUBKEY_ADDRESS,
SCRIPT_ADDRESS,
SECRET_KEY,
EXT_PUBLIC_KEY,
EXT_SECRET_KEY,
MAX_BASE58_TYPES
};
const Consensus::Params &GetConsensus() const { return consensus; }
const CMessageHeader::MessageMagic &DiskMagic() const { return diskMagic; }
const CMessageHeader::MessageMagic &NetMagic() const { return netMagic; }
int GetDefaultPort() const { return nDefaultPort; }
const CBlock &GenesisBlock() const { return genesis; }
/** Default value for -checkmempool and -checkblockindex argument */
bool DefaultConsistencyChecks() const { return fDefaultConsistencyChecks; }
/** Policy: Filter transactions that do not match well-defined patterns */
bool RequireStandard() const { return fRequireStandard; }
/** If this is a test chain */
bool IsTestChain() const { return m_is_test_chain; }
uint64_t PruneAfterHeight() const { return nPruneAfterHeight; }
/** Minimum free space (in GB) needed for data directory */
uint64_t AssumedBlockchainSize() const { return m_assumed_blockchain_size; }
/**
* Minimum free space (in GB) needed for data directory when pruned; Does
* not include prune target
*/
uint64_t AssumedChainStateSize() const {
return m_assumed_chain_state_size;
}
/** Whether it is possible to mine blocks on demand (no retargeting) */
bool MineBlocksOnDemand() const { return consensus.fPowNoRetargeting; }
/** Return the BIP70 network string (main, test or regtest) */
std::string NetworkIDString() const { return strNetworkID; }
/** Return the list of hostnames to look up for DNS seeds */
const std::vector<std::string> &DNSSeeds() const { return vSeeds; }
const std::vector<uint8_t> &Base58Prefix(Base58Type type) const {
return base58Prefixes[type];
}
const std::string &CashAddrPrefix() const { return cashaddrPrefix; }
const std::vector<SeedSpec6> &FixedSeeds() const { return vFixedSeeds; }
const CCheckpointData &Checkpoints() const { return checkpointData; }
const ChainTxData &TxData() const { return chainTxData; }
protected:
CChainParams() {}
Consensus::Params consensus;
CMessageHeader::MessageMagic diskMagic;
CMessageHeader::MessageMagic netMagic;
int nDefaultPort;
uint64_t nPruneAfterHeight;
uint64_t m_assumed_blockchain_size;
uint64_t m_assumed_chain_state_size;
std::vector<std::string> vSeeds;
std::vector<uint8_t> base58Prefixes[MAX_BASE58_TYPES];
std::string cashaddrPrefix;
std::string strNetworkID;
CBlock genesis;
std::vector<SeedSpec6> vFixedSeeds;
bool fDefaultConsistencyChecks;
bool fRequireStandard;
bool m_is_test_chain;
CCheckpointData checkpointData;
ChainTxData chainTxData;
};
/**
* Creates and returns a std::unique_ptr<CChainParams> of the chosen chain.
* @returns a CChainParams* of the chosen chain.
* @throws a std::runtime_error if the chain is not supported.
*/
std::unique_ptr<CChainParams> CreateChainParams(const std::string &chain);
CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits,
int32_t nVersion, const Amount genesisReward);
/**
* Return the currently selected parameters. This won't change after app
* startup, except for unit tests.
*/
const CChainParams &Params();
/**
* Sets the params returned by Params() to those for the given BIP70 chain name.
* @throws std::runtime_error when the chain is not supported.
*/
void SelectParams(const std::string &chain);
#endif // BITCOIN_CHAINPARAMS_H

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