C++实现区块链的源码
作者：程序小黑
这篇文章主要介绍了C++实现区块链的源码,本文通过实例代码给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
看了上面的算法，相信大家基本可以猜到，相对于比特币的限量的性质，对于本算法来说，难解程度的根本原因即为向量环路的迭代次数。迭代次数越多，则算法越难解，从而导致解题需要花费更多的时候，再基于这点，在数学上，当解题次数足够大时，效率会无限小，从而导致了解题时间无限长最后导致加密货币的发放无限小。
创世区块创建（部分大妈在前面有实现，而区块这一部分将会详细解答）
void Make_First_Block()
{
Getpublickey();
blo.data = circle;
blo.pre_hash = 0;
blo.this_hash = (blo.pre_hash+public_Key) * (a+b);
Block.push_back(blo);
}
由于在区块链中，本区快的数字签名是基于上一区块的数字签名和区块本身的DATA决定， 所以，在这里我们采用了上一区块的数字签名加上难解的PublicKey乘上长轴和短轴的和实现本区块的数字签名的算法。
添加区块（当当前区块被算出时，添加新区块，检查签名正确性。）
void Append_Block()
{
pre_blo = blo;
bool flag = true;
auto temp = public_Key;
circle = circle + 1;
Getpublickey();
blo.data = circle;
blo.pre_hash = blo.this_hash;
blo.this_hash = (blo.pre_hash + public_Key) * (a + b);
for(list::iterator itor = Block.begin(); itor != Block.end(); itor++)
{
if ((*itor).this_hash != (*itor).pre_hash + temp * (a + b))
{
flag = false;
break;
}
}
if (flag) { Block.push_back(blo); };
}
这个迭代其实可以不用的，因为我在外部还定义了一个block类型的全局变量Pre_block和blo。Pre_block存储了上一个区块的信息。而本区块的信息则存储在Blo中。只有当用户解出当前区块后，才可以得到新区块。而data参数，为了方便仅存储了当前区块所在的位置。
区块的计算（用类实现）
class Get_Block :Create_Block {
public:
int diffcult;
int number = 1;
Get_Block():Create_Block(“OK”){
}
void calc()
{
double start = clock();
while (true){
for (unsigned long long z = 1; z < ULLONG_MAX; z++){
for (unsigned long long j = 1; j < 65535; j = j + 1) {
for (unsigned long long i = 1; i < 65535; i = i + 1) {
Cryptography *person = new Cryptography(i,j,z);
person->Getpublickey();
block bloc;
bloc.data = circle;
bloc.pre_hash = pre_blo.this_hash;
bloc.this_hash = (blo.pre_hash + person->public_Key) * (i + j);
if (blo.data == bloc.data &&blo.pre_hash== bloc.pre_hash && blo.this_hash == bloc.this_hash)
{
double end = clock();
cout << “历时”<<end-start<<“毫秒获得的第” << number++ <<“个区块信息为：” << endl;
cout << “data:” << bloc.data << endl;
cout << “this_hash:” << bloc.this_hash << endl;
cout << “pre_hash:” << bloc.pre_hash << endl << “=======================” << endl << endl;
this->Append_Block();
start = clock();
}
delete []person;
}
}
}
}
}
};
完整代码：
#include
#include <stdio.h>
#include <windows.h>
#include
#include
#include
#include
#include <time.h>
using namespace std;
struct Moving_Point {
unsigned long long x;
unsigned long long y;
};
int circle = 1;
class Martix {
public:
static const int circle_s = 1; //假定向量环路为1;
static const int KEY =Martix::circle_s * 8;
private:
unsigned long long martix_4_2[Martix::KEY / 2][2]; //存储向量矩阵
unsigned long long martix_8_8[Martix::KEY][Martix::KEY]; //存储由向量矩阵得到的转置矩阵
unsigned long long martix_complete[KEY * 2]; //存储操作完成后的矩阵（一维）
public:
Martix(string a) {};
Martix(int a, int b,int circle)
{
int key = 8;
int cir = circle;
while (cir–)
{
martix_4_2[key / 2 - 4][0] = (-1)*b; martix_4_2[key / 2 - 4][1] = (-1)*a;
martix_4_2[key / 2 - 3][0] = b; martix_4_2[key / 2 - 3][1] = (-1)*a;
martix_4_2[key / 2 - 2][0] = b; martix_4_2[key / 2 - 2][1] = a;
martix_4_2[key / 2 - 1][0] = (-1)*b; martix_4_2[key / 2 - 1][1] = a;
key += 8;
}
}
void Change_New_Martix() {
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
martix_8_8[i][j] = 0;
}
}
for (int j = 2; j < KEY / 2 + 2; j++) {
martix_8_8[0][j] = martix_4_2[j - 2][0] * (-1);
martix_8_8[1][j] = martix_4_2[j - 2][1] * (-1);
}
for (int i = 2; i < KEY / 2 + 2; i++) {
martix_8_8[i][0] = martix_4_2[i - 2][0] * (-1);
martix_8_8[i][1] = martix_4_2[i - 2][1] * (-1);
}
for (int i = 2; i < KEY / 2 + 2; i++)
{
for (int j = 2; j < KEY / 2 + 2; j++)
{
martix_8_8[i][j] = 0;
}
}
}
public:
void Save_Martix()
{
int key = 0;
for (int i = 0; i < KEY / 2 + 2; i++)
{
for (int j = 0; j < KEY / 2 + 2; j++)
{
if (martix_8_8[i][j] != 0)
{
martix_complete[key++] = martix_8_8[i][j];
}
}
}
}
unsigned long long GetPublicKey()
{
unsigned long long public_key = martix_complete[0];
for (int i = 1; i < KEY * 2; i++)
{
if (i % 2 == 0)
{
public_key = public_key + martix_complete[i];
}
else {
public_key = public_key * martix_complete[i];
}
}
return public_key;
}
};
class Cryptography :Martix
{
public:
/作为私钥，发送方保存内容/
unsigned long long a; //椭圆长轴的半轴长度
unsigned long long b; //椭圆短轴的半轴长度
/作为公钥，接收方接受公钥/
unsigned long long public_Key; //通过椭圆矩阵算法得到的公钥G
Moving_Point p; //随机选定的在椭圆上的点
public:
Cryptography(string a) :Martix(“OK”) {};
Cryptography(unsigned long long in_a, unsigned long long in_b,int diffcult) :Martix(in_a, in_b,diffcult)
{
this->a = in_a;
this->b = in_b;
p.x = 0;
p.y = 0;
public_Key = Getpublickey();
}
unsigned long long Getpublickey()
{
Get_Public_Key();
return public_Key;
}
Moving_Point GetPoint()
{
Get_Point();
return p;
}
public:
void PrintPrivateKey() {
cout << “#############私钥:#############” << endl;
cout << “长轴：” << 2this->a << “\t\t”;
cout << “短轴：” << 2this->b << endl;
}
private:
void Get_Point()
{
if (p.x == 0 && p.y == 0)
{
while (!Is_Moving_Point())
{
Get_Moving_Point_P();
}
}
}
void Get_Public_Key()
{
this->Change_New_Martix();
this->Save_Martix();
this->public_Key = this->GetPublicKey();
}
void Get_Moving_Point_P() //得到一个随机的在椭圆上的点的坐标
{
for (int i = 0; i < this->a; i++)
{
for (int j = 0; j < this->b; j++)
{
p.x = i;
p.y = j;
}
}
}
bool Is_Moving_Point() {
if (pow(b, 2)*pow(p.y, 2) + pow(a, 2)*pow(p.x, 2) == pow(a, 2)*pow(b, 2) && p.y <= a && p.x <= b)
return true;
else
return false;
}
};
struct block {
unsigned long long this_hash;
unsigned long long pre_hash;
unsigned long long data;
};
block blo;
block pre_blo = {0,0,0};
class Create_Block:public Cryptography {
public:
list Block;
public:
Create_Block(string a):Cryptography(“OK”) {};
Create_Block(int x = rand()*2, int y = rand(), int diffcult = 1):Cryptography(x,y,diffcult){
}
void Make_First_Block()
{
Getpublickey();
blo.data = circle;
blo.pre_hash = 0;
blo.this_hash = (blo.pre_hash+public_Key) * (a+b);
Block.push_back(blo);
}
void Append_Block()
{
pre_blo = blo;
bool flag = true;
auto temp = public_Key;
circle = circle + 1;
Getpublickey();
blo.data = circle;
blo.pre_hash = blo.this_hash;
blo.this_hash = (blo.pre_hash + public_Key) * (a + b);
for(list::iterator itor = Block.begin(); itor != Block.end(); itor++)
{
if ((*itor).this_hash != (*itor).pre_hash + temp * (a + b))
{
flag = false;
break;
}
}
if (flag) { Block.push_back(blo); };
}
};
class Get_Block :Create_Block {
public:
int diffcult;
int number = 1;
Get_Block():Create_Block(“OK”){
}
void calc()
{
double start = clock();
while (true){
for (unsigned long long z = 1; z < ULLONG_MAX; z++){
for (unsigned long long j = 1; j < 65535; j = j + 1) {
for (unsigned long long i = 1; i < 65535; i = i + 1) {
Cryptography *person = new Cryptography(i,j,z);
person->Getpublickey();
block bloc;
bloc.data = circle;
bloc.pre_hash = pre_blo.this_hash;
bloc.this_hash = (blo.pre_hash + person->public_Key) * (i + j);
if (blo.data == bloc.data &&blo.pre_hash== bloc.pre_hash && blo.this_hash == bloc.this_hash)
{
double end = clock();
cout << “历时”<<end-start<<“毫秒获得的第” << number++ <<“个区块信息为：” << endl;
cout << “data:” << bloc.data << endl;
cout << “this_hash:” << bloc.this_hash << endl;
cout << “pre_hash:” << bloc.pre_hash << endl << “=======================” << endl << endl;
this->Append_Block();
start = clock();
}
delete []person;
}
}
}
}
}
};
int main()
{
Create_Block * one = new Create_Block();
one->Make_First_Block();
Get_Block* two = new Get_Block();
two->calc();
return 0;
}
不得不说第一个区块的挖掘永远是最快的。第二个区块确实要等好久才可以得出。以上即为C/C++实现区块链的全部源码。仅用于学习交流，不得用于商业用途，转载必究。
作者：程序小黑
来源：CSDN
原文：https://blog.csdn.net/qq_27180763/article/details/82588305
版权声明：本文为博主原创文章，转载请附上博文链接！
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