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
159
160
161
162
|
// 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.
#include "checkpoints.h"
#include "main.h"
#include "uint256.h"
#include <stdint.h>
#include <boost/assign/list_of.hpp> // for 'map_list_of()'
#include <boost/foreach.hpp>
namespace Checkpoints
{
typedef std::map<int, uint256> MapCheckpoints;
// How many times we expect transactions after the last checkpoint to
// be slower. This number is a compromise, as it can't be accurate for
// every system. When reindexing from a fast disk with a slow CPU, it
// can be up to 20, while when downloading from a slow network with a
// fast multicore CPU, it won't be much higher than 1.
static const double fSigcheckVerificationFactor = 5.0;
struct CCheckpointData {
const MapCheckpoints *mapCheckpoints;
int64_t nTimeLastCheckpoint;
int64_t nTransactionsLastCheckpoint;
double fTransactionsPerDay;
};
bool fEnabled = true;
// What makes a good checkpoint block?
// + Is surrounded by blocks with reasonable timestamps
// (no blocks before with a timestamp after, none after with
// timestamp before)
// + Contains no strange transactions
static MapCheckpoints mapCheckpoints =
boost::assign::map_list_of
( 11111, uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
( 33333, uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
( 74000, uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
(105000, uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
(134444, uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
(168000, uint256("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763"))
(193000, uint256("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317"))
(210000, uint256("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e"))
(216116, uint256("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e"))
(225430, uint256("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932"))
(250000, uint256("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214"))
;
static const CCheckpointData data = {
&mapCheckpoints,
1375533383, // * UNIX timestamp of last checkpoint block
21491097, // * total number of transactions between genesis and last checkpoint
// (the tx=... number in the SetBestChain debug.log lines)
60000.0 // * estimated number of transactions per day after checkpoint
};
static MapCheckpoints mapCheckpointsTestnet =
boost::assign::map_list_of
( 546, uint256("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70"))
;
static const CCheckpointData dataTestnet = {
&mapCheckpointsTestnet,
1338180505,
16341,
300
};
static MapCheckpoints mapCheckpointsRegtest =
boost::assign::map_list_of
( 0, uint256("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"))
;
static const CCheckpointData dataRegtest = {
&mapCheckpointsRegtest,
0,
0,
0
};
const CCheckpointData &Checkpoints() {
if (Params().NetworkID() == CChainParams::TESTNET)
return dataTestnet;
else if (Params().NetworkID() == CChainParams::MAIN)
return data;
else
return dataRegtest;
}
bool CheckBlock(int nHeight, const uint256& hash)
{
if (!fEnabled)
return true;
const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints;
MapCheckpoints::const_iterator i = checkpoints.find(nHeight);
if (i == checkpoints.end()) return true;
return hash == i->second;
}
// Guess how far we are in the verification process at the given block index
double GuessVerificationProgress(CBlockIndex *pindex) {
if (pindex==NULL)
return 0.0;
int64_t nNow = time(NULL);
double fWorkBefore = 0.0; // Amount of work done before pindex
double fWorkAfter = 0.0; // Amount of work left after pindex (estimated)
// Work is defined as: 1.0 per transaction before the last checkoint, and
// fSigcheckVerificationFactor per transaction after.
const CCheckpointData &data = Checkpoints();
if (pindex->nChainTx <= data.nTransactionsLastCheckpoint) {
double nCheapBefore = pindex->nChainTx;
double nCheapAfter = data.nTransactionsLastCheckpoint - pindex->nChainTx;
double nExpensiveAfter = (nNow - data.nTimeLastCheckpoint)/86400.0*data.fTransactionsPerDay;
fWorkBefore = nCheapBefore;
fWorkAfter = nCheapAfter + nExpensiveAfter*fSigcheckVerificationFactor;
} else {
double nCheapBefore = data.nTransactionsLastCheckpoint;
double nExpensiveBefore = pindex->nChainTx - data.nTransactionsLastCheckpoint;
double nExpensiveAfter = (nNow - pindex->nTime)/86400.0*data.fTransactionsPerDay;
fWorkBefore = nCheapBefore + nExpensiveBefore*fSigcheckVerificationFactor;
fWorkAfter = nExpensiveAfter*fSigcheckVerificationFactor;
}
return fWorkBefore / (fWorkBefore + fWorkAfter);
}
int GetTotalBlocksEstimate()
{
if (!fEnabled)
return 0;
const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints;
return checkpoints.rbegin()->first;
}
CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
{
if (!fEnabled)
return NULL;
const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints;
BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints)
{
const uint256& hash = i.second;
std::map<uint256, CBlockIndex*>::const_iterator t = mapBlockIndex.find(hash);
if (t != mapBlockIndex.end())
return t->second;
}
return NULL;
}
}
|
