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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2013 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CHAIN_PARAMS_H
#define BITCOIN_CHAIN_PARAMS_H
#include "bignum.h"
#include "uint256.h"
#include <vector>
using namespace std;
#define MESSAGE_START_SIZE 4
typedef unsigned char MessageStartChars[MESSAGE_START_SIZE];
class CAddress;
class CBlock;
struct CDNSSeedData {
string name, host;
CDNSSeedData(const string &strName, const string &strHost) : name(strName), host(strHost) {}
};
/**
* 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 Network {
MAIN,
TESTNET,
REGTEST,
MAX_NETWORK_TYPES
};
enum Base58Type {
PUBKEY_ADDRESS,
SCRIPT_ADDRESS,
SECRET_KEY,
EXT_PUBLIC_KEY,
EXT_SECRET_KEY,
MAX_BASE58_TYPES
};
const uint256& HashGenesisBlock() const { return hashGenesisBlock; }
const MessageStartChars& MessageStart() const { return pchMessageStart; }
const vector<unsigned char>& AlertKey() const { return vAlertPubKey; }
int GetDefaultPort() const { return nDefaultPort; }
const CBigNum& ProofOfWorkLimit() const { return bnProofOfWorkLimit; }
int SubsidyHalvingInterval() const { return nSubsidyHalvingInterval; }
virtual const CBlock& GenesisBlock() const = 0;
virtual bool RequireRPCPassword() const { return true; }
const string& DataDir() const { return strDataDir; }
virtual Network NetworkID() const = 0;
const vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; }
const std::vector<unsigned char> &Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
virtual const vector<CAddress>& FixedSeeds() const = 0;
int RPCPort() const { return nRPCPort; }
protected:
CChainParams() {}
uint256 hashGenesisBlock;
MessageStartChars pchMessageStart;
// Raw pub key bytes for the broadcast alert signing key.
vector<unsigned char> vAlertPubKey;
int nDefaultPort;
int nRPCPort;
CBigNum bnProofOfWorkLimit;
int nSubsidyHalvingInterval;
string strDataDir;
vector<CDNSSeedData> vSeeds;
std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
};
/**
* Return the currently selected parameters. This won't change after app startup
* outside of the unit tests.
*/
const CChainParams &Params();
/** Sets the params returned by Params() to those for the given network. */
void SelectParams(CChainParams::Network network);
/**
* Looks for -regtest or -testnet and then calls SelectParams as appropriate.
* Returns false if an invalid combination is given.
*/
bool SelectParamsFromCommandLine();
inline bool TestNet() {
// Note: it's deliberate that this returns "false" for regression test mode.
return Params().NetworkID() == CChainParams::TESTNET;
}
inline bool RegTest() {
return Params().NetworkID() == CChainParams::REGTEST;
}
#endif