Bitcoin account book

1. Nakamoto is the first person to discover bitcoin. Bitcoin is not issued by any institution, and the total amount is only 21 million yuan. The transaction of bitcoin needs the consent of 6 people!

2. It depends on the project. Take bitcoin as an example. Now the account book that records all the information of bitcoin network may reach 220g.

3.

This is a data center switch, which supports virtualization, that is VSU. Configuration reference

core switch 1:

Switch1 # configuration terminal
enter configuration commands, one per line. End with cntl / Z.

Switch1 (config) # switch virtual domain 1

Switch1 (config vs domain) # switch 1

Switch1 (config vs domain) # switch 1 priority 200 -- & gt; The default priority is 100, which is configured as a higher priority. After the VSU is successfully established, it will become the management host

Switch1(config-vs-domain)# exit

Switch1(config)# vsl-aggregateport 1 ------> At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable

Switch1(config-vsl-ap-1)# port-member interface TenGigabitEthernet 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores

Switch1 (config-vsl-ap-1) ﹥ port member interface tengigabit Ethernet 1 / 2
Switch1 (config-vsl-ap-1) ﹥ exit

core switch 2:

switch2 ﹥ configuration terminal
enter configuration commands, one per line. End with CNTL/Z.

Switch2(config)# switch virtual domain 1 ------> Domain ID must be consistent with the first one

switch2 (config vs domain) # switch 2 ----- & gt; The second device must change its ID to 2

switch2 (config vs domain) ｛ switch 2 priority 150

switch2 (config vs domain) ｛ exit
switch2 (config) ｛ VSL aggregateport 1 ----- & gt; At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable

Switch2(config-vsl-ap-1)# port-member interface TenGigabitEtherne 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores

switch2 (config-vsl-ap-1) # port member interface tengigabit Ethernet 1 / 2
switch2 (config-vsl-ap-1) # exit

4. Cash journal, bank journal, subsidiary ledger and general ledger. Inventory, fixed assets and current accounts decide whether to set up separate sub ledger for management accounting according to the business volume.

5.

Zhejiang Xinyun blockchain Technology Co., Ltd. is a limited liability company (invested or controlled by natural person) registered in Ouhai District, Wenzhou City, Zhejiang Province on April 2, 2018. Its registered address is located in room B309, 46-54 Dongfang Road, Ouhai Economic Development Zone, Wenzhou City, Zhejiang Province (trial area of cloud sharing creative space)

the unified social credit code / registration number of Zhejiang Xinyun blockchain Technology Co., Ltd. is 91330304ma2cnkpx00, and the enterprise legal person is Xiao Kang. At present, the enterprise is in business

Zhejiang Xinyun blockchain Technology Co., Ltd., within the province, the current registered capital of the enterprise is general

view more information and information of Zhejiang Xinyun blockchain Technology Co., Ltd. through network enterprise credit

6. Hello, if your train ticket is reserved online and has not been picked up, please refund it in the ticket app - train ticket order. If it is less than 30 minutes from the departure, you can only go to the station for refund, but not online. The ticket has been collected. You can only go to the station to refund the ticket before the departure time. If you miss the departure time, the national railway administration stipulates that you can't refund the ticket. If you haven't changed the ticket, you can only go to the station to handle the other times of the day If there are no other trains, or if there are no tickets for other trains, the tickets will be invalid.

7. Bitcoin is distributed accounting
bookkeeping is done by miners
generally speaking, the correct result of Distributed Accounting is decided by the vote of "miners"
if you have a 51% pool, you can theoretically void any transaction (roll back). This is called a 51% attack

now bitcoin miners are distributed all over the world. The world's largest mine pool is in China, and the person in charge of bitcoin has promised that its total power will not exceed 50% (now about 30%), so there is no possibility of 51% attack for the time being

but it can't be said to conquer

8. No one mines, no one keeps accounts, and no one keeps accounts in vain. Therefore, there should be a reward mechanism for mining. If the bitcoin price returns to zero one day, the reward will not be worth money, and no one will keep accounts

9. In order to achieve the goal of decentralization, everyone in bitcoin network can keep accounts. But with so many people all over the world recording accounts at the same time, who should listen to
this is the consensus issue of bitcoin. In other words, how to achieve decentralization at the same time, let the nodes of the whole network reach a consensus and keep the consistency of all accounts? This is a problem that the decentralized system could not solve for a long time in the past
Nakamoto Tsung proposed the solution of proof of work. It stipulates that the person who pays the most calculation work has a better chance to obtain the final bookkeeping right. His bookkeeping results will be recognized by the whole network. How to measure the calculation workload? Bookkeepers need to spend computer power to solve a problem called hash function. This problem can only be guessed one by one through computer enumeration. The stronger the calculation power, the easier it is to guess the right answer. Once a lucky bookkeeper finds the answer, he will get the right to keep accounts. And get a bitcoin reward. Everyone should listen to his accounting results and start new records on his basis
to put it simply, more is more. The harder you work, the luckier you are. POW solves the problem of mutual distrust nodes reaching consensus, and is considered to be the ancestor of all consensus mechanisms. It makes bitcoin a truly decentralized autonomous system.

10. At present, the super ledger project is progressing very fast, and people from all over the world show their skills. JPMorgan Chase has launched its own distributed ledger prototype, and also put forward its own innovative consensus algorithm, which is completely different from bitcoin's workload proof mechanism. From this point of view, J.P. Morgan has indeed begun to fight in this regard. From the information disclosed, this new way of proof is between POS and dpos. However, for the super ledger project, too many technical routes may also slow down the development of the project in the future
bitcoin is a consensus network, contributing to a new payment system and a fully digital currency. It is the first decentralized peer-to-peer payment network, which is controlled by its users without a central management organization or middleman. From the user's point of view, bitcoin is much like Internet cash. Bitcoin can also be regarded as the most outstanding three style bookkeeping system
Ruitai coin, Qianjin card and doggy coin are all digital currencies developed based on blockchain technology.