Miner expert
Before the era of blockchain, Nick Saab first proposed the concept of smart contract in 1996: a set of agreements defined in digital form, including agreements on which contract participants can execute these agreements< the basic idea of smart contracts is contracts (special transactions) that can be executed automatically (event driven) and written in code form on the blockchain
since the establishment of Ethereum smart contract, more than 90% of the contracts have been used to issue tokens, and the implementation of relevant business scenarios is still good. What is the future of smart contract? Here you can see the Bytom chain that just released the news and launched the smart contract. As the first public chain project to release AI consensus algorithm in MIT, Bytom, the original chain, released an intelligent contract based on utxo model on the 26th after the main network was successfully launched in April
different from Ethereum smart contract built on account model, Biyuan chain is the first public chain in the whole blockchain instry to build smart contract on utxo model. Biyuan chain also transforms and deepens utxo to support the operation of multiple assets. In addition, compared with the original chain, the smart contract adopts its own equity language, which is a Turing complete and interpretive high-level language. It can easily compare the assets on the original chain for operation, and flexibly integrate into various asset business scenarios
in addition to the release of contract language, more than the original chain has also released multiple contract templates, which are directly attached with clear business meaning. From these contract templates, we can directly see the scene of future commercialization landing, and can extend the imagination in a wider range
currency transaction contract
through this contract, users can trade a variety of assets in Biyuan chain and other people without going through a centralized organization. That is to say, some assets can be locked through the contract. Only when other users enter the specified amount of assets, can they unlock these assets
for example, a decentralized exchange is built on the basis of contract, through which the two parties who want to exchange different assets in different currencies can be matched directly. The transaction speed is fast, and only a very small transaction fee is charged
third party trusteeship contract
under the contract template, users can transfer the specified assets to the third party's account, and the third party decides whether to call the specified account or return to the original account. The third party trust trust trust agreement stipulates that the third party institution can only transfer the assets to the designated account or return to the original account, which prevents the possibility of the third party account from stealing. In the business scenario, it can be expected that an asset custody platform can be built on the basis of the trusteeship contract of the third-party trusteeship institution in the future, which can ensure the custody, transaction and circulation of users' assets through the double trust of the trusted third party and the contract
mortgage contract
that is, the borrower will borrow the assets, and the lender will mortgage the assets into the same contract, and the lender will obtain the borrower's assets. If the lender fails to return the borrower's assets at a certain block height, the borrower will automatically obtain the lender's mortgage assets
call option contract
in this contract, the asset issuer can sell an asset at a certain price, and the buyer can buy the asset at that price. When it exceeds the height of a block, the asset will automatically return to the asset issuer
from the above design of smart contract, we can see some advantages:
firstly, a variety of templates with business meaning provide convenience for the upper layer to build DAPP, and some core business processes can be realized without too much development; Secondly, compared with the original chain, smart contracts issuing assets have templates. Compared with different developers, the security risk under the standard template is much lower. In addition, the contract will be invoked as a sub contract than the original chain when creating the intelligent contract. The contract template changes or errors that will be invoked in the future will not affect all completed intelligent contracts, which is of high security value for the early intelligent contracts. p>
we can understand that using the ratio chain of the extended utxo model butxo to interact with assets as a new form of utxo not only avoids the emergence of data overflow and other vulnerabilities in the Ethereum account model, but also has flexibility, diversity and controllability
for Biyuan chain, the release of smart contract also marks the determination of its core, which will further promote the commercialization of the project
in 1982, David JOM first proposed the untraceable cryptography network payment system< In 1990, JOM extended his idea to the original cryptology anonymous cash system< In 1998, David published an article on an anonymous and distributed e-cash system, which he named "B-money"
in 2008, a self styled Japanese American engineer, TSUO Nakamoto, published a paper on the e-cash system of digital currency in the mailing list of a cryptography website
on January 31, 2009, Nakamoto created bitcoin, the first digital cryptocurrency in history
by 2013, bitcoin had increased by 460000 times. At the same time, there was a wave of digital currency all over the world, releasing hundreds of digital currencies successively, and forming a digital currency ecological chain with hundreds of billion US dollars of investment
in October 2013, the world's first bitcoin ATM came out in Vancouver, Canada
in early 2014, the U.S. law passed the resolution that bitcoin is the legal property of citizens
on January 1, 2014, after bitcoin, the Internet, network gold, was born
the concept of network gold was put forward by Dr. David of the United States in 1982. With the development of the Internet, after 30 years of continuous invention and improvement by international players such as Zhongben Cong in 2009, it was finally invented by 17 it experts from seven countries headed by former Microsoft engineers on January 1, 2014.
Jiangxi Naipu rubber procts Co., Ltd., Jiangxi TIANRI Instrial Co., Ltd., Shangrao Naipu Machinery Manufacturing Co., Ltd., Beijing Naipu Global trade Co., Ltd., Shanghai Naipu International Trade Co., Ltd., Lanzhou Naipu mining machinery equipment Co., Ltd., etc. Main customers: Jiangxi Copper Group, MCC group, China nonferrous metals mining group, Tongling Nonferrous Metals Group, Jinchuan Group, Luoyang CITIC, Hebei Fengning Xinyuan mining, gold group, Qinghai derney, Metso mining machinery, Australia pjf company, Chile Santiago Megamin company, Tajikistan zelavshang, Mongolia erdente, Pakistan Sandak Chambishi, Zambia and large-scale iron and steel enterprises such as Angang and Xingang
the company has established strategic cooperation with Metso mining machinery and other famous enterprises, and has established close technical cooperation with East China University of science and technology and other universities. The company has employed many well-known experts in the instry as technical consultants for a long time, who have provided powerful technical support and guarantee for Neptune< The project will be completed in the summer of 2008, with an annual output value of 300 million yuan
Edison only went to primary school for three months in his life. His knowledge came from his mother's teaching and self-study. His success should be attributed to his mother's understanding and patient teaching since childhood, which made Edison, who was originally regarded as an incompetent child, become a world-famous "king of invention" when he grew up
Edison was curious about many things since he was a child, and he liked to experiment with them himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his own interests. He set up a laboratory in New Jersey and invented more than 2000 kinds of things in his life, such as electric lamp, telegraph, phonograph, video camera, magnetic separator, crusher and so on. Edison's strong research spirit made him make great contribution to the improvement of human life style
"waste, the biggest waste is to waste time." Edison often said to his assistant“ Life is too short. Think more and do more with less time. "
one day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a light port and said, "you measure the capacity of the bulb." He bowed his head to work again
after a long time, he asked, "what's the capacity?" He didn't hear the answer. He turned his head and saw his assistant measuring the perimeter and inclination of the bulb with a tape measure. He took the measured number and put it on the table to calculate. He said, "time, time, how do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water, handed it to his assistant, and said, "pour the water in the measuring glass, and tell me its capacity right away."
the assistant immediately read out the number
Edison said, "what an easy way to measure. It's accurate and time-saving. Why can't you think of it? Is it not a waste of time? "
the assistant blushed
Edison murmured: "life is too short, too short. Save time and do more things!"< Before he became famous, Edison was a poor worker. Once, his old friend met him in the street and said with concern, "look, this overcoat on you is not in good condition. You should replace it with a new one."
"do you need it? No one knows me in New York Edison answered with indifference
a few years later, Eddie has become a great inventor< One day, Edison met his friend on the street of New York“ "Oh," exclaimed the friend, "Why are you still wearing this old coat? This time, you need a new one anyway
"do you need it? Everyone here already knows me. " Edison still answered with indifference
one snowy night, Edison's mother suddenly fell ill, and his father rushed to the doctor. The doctor said, "your mother has acute appendicitis and needs an operation.". At that time, there was only oil lamp, but no electric lamp. The light of the oil lamp was very dark, and it would be wrong if you were not careful. Edison suddenly thought of a good way, he took out all the oil lamps at home, and then put a mirror behind the oil lamp to let the doctor finish the operation smoothly. The doctor said, "son, you saved your mother with your wisdom and cleverness." Edison took his mother's hand and said, "Mom, I want to make a night's sun."< In order to carry out experiments, Edison did not go out of the laboratory or sleep for several days. I was so tired that I took a nap on the experimental table with a book as a pillow. One day, his friend joked: "no wonder Edison knew so many inventions. It turned out that he was absorbing nutrition from books even when he was sleeping."
once, when it was time for dinner, Edison still didn't come back. His parents were very anxious and looked around. They didn't find him in the grass shed by the yard until the evening. Father saw him lying motionless in the grass with a lot of eggs, so he asked strangely, "what are you doing?" Little Edison answered calmly, "I'm hatching chickens." It turned out that when he saw that hens would hatch chickens, he felt very strange and always wanted to try it on his own. At that time, his father pulled him up and told him that people can't hatch chickens. On the way home, he was still puzzled and asked, "why can't I, when hens can hatch chickens?"
Edison was always in danger because he was interested in many things. Once, he went to the house where the wheat was stored and accidentally fell into the wheat store. The wheat buried his head and couldn't move. He nearly died. Fortunately, he was caught by Edison's foot and pulled out in time. Another time, he fell into the water and was pulled up like a drowned chicken. He himself was shocked. When he was 4 years old, he wanted to see what was in the wild beehive on the fence, so he poked it with a branch. His face was stung by a wild bee, and he could hardly open his eyes.