blob: a9512127c91970e68ffe946405d0130070e5dc8f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// 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_PRIMITIVES_PUREHEADER_H
#define BITCOIN_PRIMITIVES_PUREHEADER_H
#include "serialize.h"
#include "uint256.h"
/**
* A block header without auxpow information. This "intermediate step"
* in constructing the full header is useful, because it breaks the cyclic
* dependency between auxpow (referencing a parent block header) and
* the block header (referencing an auxpow). The parent block header
* does not have auxpow itself, so it is a pure header.
*/
class CPureBlockHeader
{
public:
/* Modifiers to the version. */
static const int32_t VERSION_AUXPOW = (1 << 8);
/** Bits above are reserved for the auxpow chain ID. */
static const int32_t VERSION_CHAIN_START = (1 << 16);
// header
int32_t nVersion;
uint256 hashPrevBlock;
uint256 hashMerkleRoot;
uint32_t nTime;
uint32_t nBits;
uint32_t nNonce;
CPureBlockHeader()
{
SetNull();
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action)
{
READWRITE(this->nVersion);
READWRITE(hashPrevBlock);
READWRITE(hashMerkleRoot);
READWRITE(nTime);
READWRITE(nBits);
READWRITE(nNonce);
}
void SetNull()
{
nVersion = 0;
hashPrevBlock.SetNull();
hashMerkleRoot.SetNull();
nTime = 0;
nBits = 0;
nNonce = 0;
}
bool IsNull() const
{
return (nBits == 0);
}
uint256 GetHash() const;
uint256 GetPoWHash() const;
int64_t GetBlockTime() const
{
return (int64_t)nTime;
}
/* Below are methods to interpret the version with respect to
auxpow data and chain ID. This used to be in the CBlockVersion
class, but was moved here when we switched back to nVersion being
a pure int member as preparation to undoing the "abuse" and
allowing BIP9 to work. */
/**
* Extract the base version (without modifiers and chain ID).
* @return The base version./
*/
inline int32_t GetBaseVersion() const
{
return GetBaseVersion(nVersion);
}
static inline int32_t GetBaseVersion(int32_t ver)
{
return ver % VERSION_AUXPOW;
}
/**
* Set the base version (apart from chain ID and auxpow flag) to
* the one given. This should only be called when auxpow is not yet
* set, to initialise a block!
* @param nBaseVersion The base version.
* @param nChainId The auxpow chain ID.
*/
void SetBaseVersion(int32_t nBaseVersion, int32_t nChainId);
/**
* Extract the chain ID.
* @return The chain ID encoded in the version.
*/
inline int32_t GetChainId() const
{
return nVersion >> 16;
}
/**
* Set the chain ID. This is used for the test suite.
* @param ch The chain ID to set.
*/
inline void SetChainId(int32_t chainId)
{
nVersion %= VERSION_CHAIN_START;
nVersion |= chainId * VERSION_CHAIN_START;
}
/**
* Check if the auxpow flag is set in the version.
* @return True if this block version is marked as auxpow.
*/
inline bool IsAuxpow() const
{
return nVersion & VERSION_AUXPOW;
}
/**
* Set the auxpow flag. This is used for testing.
* @param auxpow Whether to mark auxpow as true.
*/
inline void SetAuxpowFlag(bool auxpow)
{
if (auxpow)
nVersion |= VERSION_AUXPOW;
else
nVersion &= ~VERSION_AUXPOW;
}
/**
* Check whether this is a "legacy" block without chain ID.
* @return True if it is.
*/
inline bool IsLegacy() const
{
return nVersion == 1
// Discoin: We have a random v2 block with no AuxPoW, treat as legacy
|| (nVersion == 2 && GetChainId() == 0);
}
};
#endif // BITCOIN_PRIMITIVES_PUREHEADER_H
|