Smart contract for blockchain traceability

1. Smart contract can be simply understood as a piece of code written on the blockchain, which is event driven, has dynamic state, obtains multi-party recognition, and can automatically process the information on the chain according to the preset conditions. Once an event triggers the terms in the contract, the code will be executed automatically. The biggest advantage of smart contract is to use program algorithm to replace human arbitration and contract execution
smart contract is a contract that uses computer language instead of legal language to record terms. Once it is written, it can be trusted by users. The terms of the contract cannot be changed, so the contract cannot be changed. If the procere meets the conditions, it will be carried out, and there is no human interference to ensure absolute fairness
three technical features of smart contract
● data transparency
all data on the blockchain are open and transparent, so the data processing of smart contract is also open and transparent, and any party can view its code and data at runtime
● can't tamper
all data of the blockchain itself can't be tampered, so the code of the smart contract deployed on the blockchain and the data generated by the operation can't be tampered, and the node running the smart contract doesn't have to worry about malicious modification of the code and data by other nodes
● permanent operation
the number of nodes supporting the blockchain network often reaches hundreds or even thousands. The failure of some nodes will not lead to the stop of the smart contract, and its reliability is close to permanent operation in theory, which ensures that the smart contract can be as effective as the paper contract at all times.

2. With the breakthrough of blockchain technology, the smart contract has a chance of rebirth. The smart contract based on blockchain technology can not only give play to the advantages of smart contract in cost efficiency, but also avoid the interference of malicious behavior on the normal execution of the contract. The smart contract is written into the blockchain in digital form, and the characteristics of blockchain technology ensure that the whole process of storage, reading and execution is transparent, traceable and unchangeable; At the same time, the strong security consensus mechanism does not need the intervention of three parties: a set of state machine system is constructed by the consensus algorithm of the blockchain, so that the intelligent contract can run efficiently.

3. Chongqing jinwowo analyzes the role of smart contract in blockchain technology as follows:
three characteristics of smart contract in blockchain can be summed up:
1) decentralization. It doesn't rely on the centralized server and runs automatically through the network nodes
2) good trust mechanism. The crisis of trust is greatly reced, and it is not necessary to consider whether the participation is trustworthy
3) high degree of autonomy. Once the condition is triggered, the contract will be executed automatically without interference

4. In a word, the blockchain technology has realized the smart contract. Specifically, you can go to the app of lianpai community to learn about it. The lecturer in the app said that the blockchain related content is very simple, easy to understand and professional

5. In short, a group digs bitcoin on the computer, which is equivalent to a big mine.

6. Blockchain technology has gone from blockchain 1.0 in 2009, the application of digital currency represented by bitcoin bits to blockchain 2.0 in 2015, the combination of digital currency and smart contract to blockchain 3.0 in 18 years, breaking through the financial field and benefiting other instries. Shangmiao code anti-counterfeiting traceability platform combines the four characteristics of blockchain Technology: 1. Decentralization: the blockchain consists of many nodes to form an end-to-end network, and there is no centralized equipment and management organization. 2. Tamper proof: the database modification of a single node or even multiple nodes cannot affect the database of other nodes. 3. Transaction transparency: the operation rules of the blockchain are open and transparent, all data information is also open, and each transaction is visible to all nodes. 4. Traceability: each transaction in the blockchain is connected in series with two adjacent blocks by password method, so it can be traced back to the origin and development of any transaction. Miao code anti-counterfeiting traceability platform collects the data distributed in different nodes, verifies the authenticity of the data on the premise of ensuring that the data can not be changed, and finally presents it to consumers.

7. According to the introction of the technical team of Tongbao blockchain, it is a simple value transmission, so that digital assets can circulate freely on the blockchain. Hope to adopt