From practice, it can be found that the cost of blockchain technology development is mainly affected by development requirements and complexity, and there are great differences. According to the market level, the cost of a complete blockchain technology development project is at least 10 million US dollars, and the highest will reach several million US dollars. The specific price is determined by factors such as the complexity of demand, the level of development team, and the knowledge richness of blockchain.
In addition, in the process of promoting the development of blockchain technology, in addition to centralized development projects, most blockchain applications can also be developed in a decentralized manner, such as smart contracts. Public chains such as Ethereum provide development tools, and the development of smart contracts only needs to pay the fuel fee, which can greatly reduce the development cost and expand the application scope.
Blockchain is a chain composed of one block after another. A certain amount of information is stored in each block, and they are connected into a chain according to their own time sequence. The chain is stored in all servers. As long as one server in the whole system can work, the whole blockchain is safe.
These servers are called nodes in the blockchain system, and they provide storage space and computing power support for the whole blockchain system. If you want to modify the information in the blockchain, you must obtain the consent of more than half of the nodes to modify the information in all nodes, and these nodes are usually in the hands of different subjects, so it is extremely difficult to tamper with the information in the blockchain.
Compared with traditional networks, blockchain has two core characteristics: one is that data is difficult to tamper with, and the other is decentralization. Based on these two characteristics, the information recorded by blockchain is more authentic and reliable, which is helpful to solve the problem of mutual distrust.