Types of virtual currency in 2014
2. Eth: smart contract and e-cash
3. BCH: Clone of bitcoin
4. XRP: enterprise transfer network
5. LTC: faster version of bitcoin
6. Dash: Clone of bitcoin with stronger privacy
7. Neo: Chinese version of Ethereum
8. NEM: Xinjing movement digital assets
9. XmR: anonymous digital cash
10 Etc: Ethereum clone
11, iota: Internet of things transfer
12, qtum: smart contract
13, OMG: banking, remittance, exchange
14, Zec: anonymous digital cash
15, BCC: Madoff like investment fund
16, lisk: distributed app written in Java
17, ADA: layered digital cash and smart contract
18, tether: US $1
19 XLM: IOU of digital cash
20, EOS: distributed app on webassembly
21, HSR: blockchain switch
22, waves: distributed exchange and crowdfunding
23, stratis: distributed app in C language
24, KMD: distributed ICO
25, ark: blockchain switch
26, ETN: cloned Monroe coin
27, BCN: anonymous digital cash
28 Steem: reddit voting with token
29, ardr: can generate the master chain of blockchain
30, BNB: compensate the transaction fee of coin security
31, augur: distributed forecast market
32, ppt: Bill financial system of blockchain
33, DCR: bitcoin with independent management mechanism
34, pay: digital currency payment card
35, Maid: rent hard disk space
36 Bitcoin disk: Clone XZC
37, BTS: distributed exchange
38, GNT: renting computer computing power
39, pivx: Clone dash without inflation
40, gas: payment of Neo transfer fee
41, TRX: payment within app
42, VTC: Clone bitcoin
43, Mona: Japanese dogcoin
44, FCT: distributed data record
45 Bat: distributed advertising network
46, salt: digital currency based mortgage network
47, KNC: distributed exchange
48, Doge: cute bitcoin clone
49, DGD: Gold digital monetization managed by the company
50, WTC: Internet of things blockchain
51, jiuzhuang bcbot
In 2016, the global ranking of virtual currency is respectively as follows:
< H2 > bitcoin, Leyte, Ecuadorian, reborn, bitstock, doggy, Diablo, futurecoin, diandiancoin and Xingxing < H2 > first place: bitcoinsince its release in 2009, bitcoin has become the most well-known virtual currency. This virtual currency was developed by indivials or organizations under the pseudonym of "Nakamoto Tsung" (whose real identity has always been unknown), and is mainly used by online merchants. However, in recent years, some small physical merchants have begun to accept bitcoin payment. Through complex algorithms and a large number of computing resources, users can obtain bitcoin through "mining". Of course, they can also purchase bitcoin through exchanges or services like bitinstagnt and coinbase. The total amount of bitcoin that can be mined is about 21 million, while the current mining amount has exceeded 11 million. Bitcoin has attracted the attention of Western Union, MoneyGram and paypal. It is reported that these services are evaluating whether users are allowed to use bitcoin on their respective platforms
< H2 > second place: lightcoinlightcoin is inspired by bitcoin (BTC) and has the same implementation principle in technology. The creation and transfer of lightcoin is based on an open source encryption protocol and is not managed by any central organization. Lightcoin aims to improve bitcoin. Compared with bitcoin, lightcoin has three significant differences. First, the lightcoin network can process a block every 2.5 minutes (instead of 10 minutes), so it can provide faster transaction confirmation. Second, the lightcoin network is expected to proce 84 million lightcoins, four times the amount of money issued by bitcoin network. Thirdly, the scrypt encryption algorithm first proposed by Colin Percival is used in lightcoin's workload proof algorithm, which makes it easier to mine lightcoin on ordinary computer than bitcoin. Each Leyte coin is divided into 100000000 smaller units, and the third place is defined by eight decimal places: Ecuadorian currency. In December 2014, Ecuador launched the "electronic currency system"
Ecuadorian currency, or EDC, which is a digital currency issued by the Central Bank of the government of Ecuador. In December 2014, the Ecuadorian market was launched, In 2015, the number of Ecuadorian currency members reached 500000, which will be recognized and sought after by investors after launching the European market and Asian market in 2015, and achieve a complete success. It will strongly launch the Chinese market at the end of September 2016, and will issue a limited number of 50 million pieces in China, which has a strong scarcity! This is an international hot topic with a wide range of admirers in the world. Historical currency is a kind of P2P digital code. Ecuadorian currency is not issued by a specific monetary institution. It is generated by a large number of calculations based on a specific algorithm. Ecuadorian currency economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions
decentralized encrypted digital currency has no issuing institution, and it does not belong to any indivial, institution, bank or country, so it cannot be shut down. Ecuadorian coin mining machine is mining 24 hours a day, and the extracted Ecuadorian coin can be traded through the trading platform to obtain profits. Ecuadorian coin mining refers to the scrypt algorithm, The process of collecting and sorting the transaction information that has not been recognized by Ecuadorian currency in the past period of time, broadcasting to all nodes in the whole network, and finally being recognized by all nodes and getting Ecuadorian currency. Mining is the only way to issue new currency, which plays an important role in issuing new currency, maintaining Ecuadorian payment function and ensuring system security
Like bitcoin, XRP is a digital currency based on Mathematics and cryptography. However, unlike bitcoin, XRP has no real purpose. XRP has the main function of bridging currency and ensuring security in ripple system, among which the function of ensuring security is indispensable, This requires that all gateways participating in this protocol must hold a small amount of XRPin theory, gateways don't need to buy many xrps, and their prices are very cheap. One XRP is only 0.4 cent (as of March 14, 2015, its price has risen to about 1 cent). Like bitcoin, the number of xrps can not be "over issued" (the total number is 100 billion), but since a small amount of xrps will be destroyed in each transaction, it means that the number of xrps will graally decrease. If ripple protocol can become the global mainstream payment protocol, the gateway's demand for XRP will be more extensive - the demand is strong but the quantity is decreasing, which will lead to the appreciation of XRP
< H2 > fifth place: bitstocksbitstocks adopt an architecture similar to bitcoin blockchain. In the bitcoin blockchain architecture, each transaction data must be written from the previous transaction data, and new outputs are generated almost at the same time to be used for future transaction data writing. Each stroke can only be used once under certain conditions. Each transaction output contains the balance information of bitcoin, proving that it can be used for future transactions. In order not to proce bitcoin out of nothing, the write value of the transaction must be greater than the output value
bitcoin uses a simple script language to evaluate the situation that the balance is insufficient when the transaction is output; However, most of the transaction output only needs the holder's encrypted signature
< H2 > sixth place: dogcoindogcoin, some people call it "dogcoin", was born on December 8, 2013, based on the scrypt algorithm, is the second largest virtual currency in the world after bitcoin in the number of users [1]. Digital currency is a global currency initiated by non-governmental organizations. It does not belong to a certain country, but belongs to the whole mankind. It has the advantages of fast global transfer. For example, it can remit money from China to the United States in a few seconds, with low cost, and the total amount will not be increased at will like legal money, so the total amount is relatively stable
after the launch of dogcoin system, e to the help of reddit (the doge content on this website overflows horribly), the traffic shows an explosive development. However, in two weeks, dogcoin has launched a special blog and forum, with a market value of 100 million as of June 9, 2015. Because there is no pre dig, dog coin distribution is fair, charity, reward culture is popular, and user development is amazing and rapid. On June 9, 2015, the number of Dog Coin client addresses was 1.6 million, more than five times that of Wright coin; The number of active client addresses is 196000 in bitcoin, 83000 in dogcoin and 11000 in lightcoin; There are more than 150000 foreign Twitter users, 1.7 times of bitcoin and 6 times of lightcoin. Facebook likes are the same as bitcoin, far more than lightcoin [2]. The daily real transaction volume has been ranked in the top three of virtual currency for a long time, which is still not as good as the result obtained before the big platform [3]. The biggest value of the enterprise Internet era is the huge number of users. It took one year for the user base of dogcoin to reach one third of the number of bitcoin users, and the seventh place is lightcoin, which is four times the number of bitcoin users. A special solution is one of the infinite (in fact, bitcoin is finite) solutions that can be obtained from the equations. Every particular solution can solve the equation and is unique[ 8] In the metaphor of RMB, black money is the serial number of RMB. If you know the serial number of a note, you have the note. The process of mining is to constantly seek the special solution of the equation system through huge amount of calculation. The equation system is designed to have only 22 million special solutions, so the upper limit of bitcoin is 22 million[ 8]
to mine the dark coin, you can download the special dark coin calculation tool, register various cooperative mine pool websites, fill the registered user name and password (miner user) into the calculation program, and then click the operation to officially start. After completing the installation of the darkcoin client, you can directly obtain a darkcoin address. When others pay, you only need to post the address to others, and you can pay through the same client. After installing the Black Coin client, it will distribute a private key and a public key. You need to back up your wallet data containing your private key to ensure that your property is not lost. Unfortunately, if the hard disk is completely formatted, the personal dark coin will be completely lost
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <errno.h>
/* 接收缓冲区大小 */
#define RCV_BUF_SIZE 1024 * 5
/* 接收缓冲区 */
static int g_iRecvBufSize = RCV_BUF_SIZE;
static char g_acRecvBuf[RCV_BUF_SIZE] = {0};
/* 物理网卡接口,需要根据具体情况修改 */
static const char *g_szIfName = "eth1";
/* 以太网帧封装的协议类型 */
static const int g_iEthProId[] = { ETHERTYPE_PUP,
ETHERTYPE_SPRITE,
ETHERTYPE_IP,
ETHERTYPE_ARP,
ETHERTYPE_REVARP,
ETHERTYPE_AT,
ETHERTYPE_AARP,
ETHERTYPE_VLAN,
ETHERTYPE_IPX,
ETHERTYPE_IPV6,
ETHERTYPE_LOOPBACK
};
static const char g_szProName[][24] = {
"none", "xerox pup", "sprite", "ip", "arp",
"rarp", "apple-protocol", "apple-arp",
"802.1q", "ipx", "ipv6", "loopback"
};
/* 输出MAC地址 */
static void ethmp_showMac(const int iType, const char acHWAddr[])
{ int i = 0;
if (0 == iType)
{
printf("SMAC=[");
}
else
{
printf("DMAC=[");
}
for(i = 0; i < ETHER_ADDR_LEN - 1; i++)
{
printf("%02x:", *((unsigned char *)&(acHWAddr[i])));
}
printf("%02x] ", *((unsigned char *)&(acHWAddr[i])));
}
/* 物理网卡混杂模式属性操作 */
static int ethmp_setPromisc(const char *pcIfName, int fd, int iFlags)
{ int iRet = -1;
struct ifreq stIfr;
/* 获取接口属性标志位 */
strcpy(stIfr.ifr_name, pcIfName);
iRet = ioctl(fd, SIOCGIFFLAGS, &stIfr);
if (0 > iRet)
{ perror("[Error]Get Interface Flags");
return -1;
}
if (0 == iFlags)
{ /* 取消混杂模式 */
stIfr.ifr_flags &= ~IFF_PROMISC;
}
else
{ /* 设置为混杂模式 */
stIfr.ifr_flags |= IFF_PROMISC;
}
iRet = ioctl(fd, SIOCSIFFLAGS, &stIfr);
if (0 > iRet)
{ perror("[Error]Set Interface Flags");
return -1;
}
return 0;
}
/* 获取L2帧封装的协议类型 */
static char *ethmp_getProName(const int iProNum)
{ int iIndex = 0;
for(iIndex = 0; iIndex < sizeof(g_iEthProId) / sizeof(g_iEthProId[0]); iIndex++)
{ if (iProNum == g_iEthProId[iIndex])
{
break;
}
}
return (char *)(g_szProName[iIndex + 1]);
}
/* Init L2 Socket */
static int ethmp_initSocket()
{ int iRet = -1;
int fd = -1;
struct ifreq stIf;
struct sockaddr_ll stLocal = {0};
/* 创建SOCKET */
fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (0 > fd)
{ perror("[Error]Initinate L2 raw socket");
return -1;
}
/* 网卡混杂模式设置 */
ethmp_setPromisc(g_szIfName, fd, 1);
/* 设置SOCKET选项 */
iRet = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &g_iRecvBufSize,sizeof(int));
if (0 > iRet)
{ perror("[Error]Set socket option");
close(fd);
return -1;
}
/* 获取物理网卡接口索引 */
strcpy(stIf.ifr_name, g_szIfName);
iRet = ioctl(fd, SIOCGIFINDEX, &stIf);
if (0 > iRet)
{ perror("[Error]Ioctl operation");
close(fd);
return -1;
}
/* 绑定物理网卡 */
stLocal.sll_family = PF_PACKET;
stLocal.sll_ifindex = stIf.ifr_ifindex;
stLocal.sll_protocol = htons(ETH_P_ALL);
iRet = bind(fd, (struct sockaddr *)&stLocal, sizeof(stLocal));
if (0 > iRet)
{ perror("[Error]Bind the interface");
close(fd);
return -1;
}
return fd;
}
/* 解析Ethernet帧首部 */
static int ethmp_parseEthHead(const struct ether_header *pstEthHead)
{ unsigned short usEthPktType;
if (NULL == pstEthHead)
{ return -1;}
/* 协议类型、源MAC、目的MAC */
usEthPktType = ntohs(pstEthHead->ether_type);
printf(">>>\nEth-Pkt-Type:0x%04x(%s) ", usEthPktType, ethmp_getProName(usEthPktType));
ethmp_showMac(0, pstEthHead->ether_shost);
ethmp_showMac(1, pstEthHead->ether_dhost);
return 0;
}
/* 解析IP数据包头 */
static int ethmp_parseIpHead(const struct ip *pstIpHead)
{ struct protoent *pstIpProto = NULL;
if (NULL == pstIpHead)
{ return -1;}
/* 协议类型、源IP地址、目的IP地址 */
pstIpProto = getprotobynumber(pstIpHead->ip_p);
if(NULL != pstIpProto)
{ printf("\nIP-Pkt-Type:%d(%s) ", pstIpHead->ip_p, pstIpProto->p_name); }
else
{ printf("\nIP-Pkt-Type:%d(%s) ", pstIpHead->ip_p, "None");}
printf("SAddr=[%s] ", inet_ntoa(pstIpHead->ip_src));
printf("DAddr=[%s]\n", inet_ntoa(pstIpHead->ip_dst));
return 0;
}
/* 数据帧解析函数 */
static int ethmp_parseFrame(const char *pcFrameData)
{ int iRet = -1;
struct ether_header *pstEthHead = NULL;
struct ip *pstIpHead = NULL;
/* Ethnet帧头解析 */
pstEthHead = (struct ether_header*)g_acRecvBuf;
iRet = ethmp_parseEthHead(pstEthHead);
if (0 > iRet)
{ return iRet;}
/* IP数据包类型 */
pstIpHead = (struct ip *)(pstEthHead + 1);
iRet = ethmp_parseIpHead(pstIpHead);
return iRet;
}
/* 捕获网卡数据帧 */
static void ethmp_startCapture(const int fd)
{ int iRet = -1;
socklen_t stFromLen = 0;
/* 循环监听 */
while(1)
{ /* 清空接收缓冲区 */
memset(g_acRecvBuf, 0, RCV_BUF_SIZE);
/* 接收数据帧 */
iRet = recvfrom(fd, g_acRecvBuf, g_iRecvBufSize, 0, NULL, &stFromLen);
if (0 > iRet)
{ continue;}
/* 解析数据帧 */
ethmp_parseFrame(g_acRecvBuf);
}
}
/* Main */
int main(int argc, char *argv[])
{ int iRet = -1;
int fd = -1;
/* 初始化SOCKET */
fd = ethmp_initSocket();
if(0 > fd) {
return -1;
}
/* 捕获数据包 */
ethmp_startCapture(fd);
/* 关闭SOCKET */
close(fd);
return 0;
}
编译命令
gcc -o a a.c
./a
实现效果图
...
>>>Eth-Pkt-Type:0x0800(ip) SMAC=[00:1a:92:ef:b6:dd] DMAC=[00:24:7e:dc:99:18] IP-Pkt-Type:6(tcp) SAddr=[192.168.0.111] DAddr=[192.168.0.100]
>>> Eth-Pkt-Type:0x0800(ip) SMAC=[00:24:7e:dc:99:18] DMAC=[00:1a:92:ef:b6:dd] IP-Pkt-Type:6(tcp) SAddr=[192.168.0.100] DAddr=[192.168.0.111]
>>> Eth-Pkt-Type:0x0800(ip) SMAC=[00:24:7e:dc:99:18] DMAC=[00:1a:92:ef:b6:dd] IP-Pkt-Type:1(icmp) SAddr=[192.168.0.100] DAddr=[192.168.0.111]
>>> Eth-Pkt-Type:0x0800(ip) SMAC=[00:1a:92:ef:b6:dd] DMAC=[00:24:7e:dc:99:18] IP-Pkt-Type:1(icmp) SAddr=[192.168.0.111] DAddr=[192.168.0.100]
>>> Eth-Pkt-Type:0x0800(ip) SMAC=[00:1a:92:ef:b6:dd] DMAC=[00:24:7e:dc:99:18] IP-Pkt-Type:6(tcp) SAddr=[192.168.0.111] DAddr=[192.168.0.100]
...
2. Monetary policy refers to the measures taken by the government or the central bank to influence economic activities, especially the measures to control money supply and interest rate. The nature of monetary policy is one of the most attractive, important and controversial fields in macroeconomics. A government has a variety of policy tools to achieve its macroeconomic goals.
5. The people's Bank of China is scheled to issue a set of Chinese bronze gold and Silver Commemorative Coins (Group 3) on August 8, 2014. There are 5 commemorative coins in total, including 2 gold coins and 3 silver coins
6. The people's Bank of China is scheled to issue a set of panda plus gold and silver commemorative coins for the 60th anniversary of the founding of China Construction Bank on July 31, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins for the 60th anniversary of the founding of Xinjiang proction and Construction Corps on June 30, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins for Hangzhou West Lake Cultural Landscape on May 30, 2014. The people's Bank of China is scheled to issue a set of 2014 Qing World Horticultural Expo panda plus gold and silver commemorative coins on April 15, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins for the 50th anniversary of the establishment of diplomatic relations between China and France on March 20, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins in the holy land of Chinese Buddhism (Mount Emei) on March 21, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins for the second Summer Youth Olympic Games on February 28, 2014. The people's Bank of China is scheled to issue a set of gold and silver commemorative coins on January 22, 2014. There are two commemorative coins in this set, including one gold coin and one silver coin
the whole fare is 20 yuan / person time
the starting point of the city is the civil aviation bus port next to the main door of Apollo Hotel,
starting from 6 a.m. (when the passengers on the bus have morning shift to catch up with the flight, Generally, the bus leaves at 05:55 in advance.
)
the civil aviation bus leaves every 25 minutes for Changle International Airport.
the latest bus leaves at 19:00 in the evening
it usually takes 1 hour and 10 minutes by car.
starting from Apollo Hotel in the city, the morning flight starts at 6:00, and the last one leaves from Apollo at 19:00; The last airport bus is at the end of the last flight of the day. Every 25 minutes, or the bus is full, and you can walk even if it's less than 25 minutes
the ticket price is 20 yuan.