C++实现区块链的源码

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GMoving_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;elsereturn 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。

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