Hyperledger Fabric is an open source blockchain framework designed to improve transaction speed and scalability. It employs a range of techniques and methods to achieve these goals.

First, double speed chain uses distributed ledger technology. In a traditional blockchain system, each participant keeps a copy of the entire ledger, which results in a huge amount of data, reducing performance and scalability. The double speed chain implements the distributed ledger by dividing the participants into different roles, such as ordering service nodes, peer nodes, and client nodes. Among them, the ordering service node is responsible for sequencing and confirming transactions, the peer node is responsible for maintaining and verifying the ledger, and the client node is used to interact with the chain. Through this architecture, the double speed chain is able to improve the concurrency and processing power of transactions, thereby improving transaction speed and scalability.

Secondly, the double speed chain adopts the model of private chain or alliance chain. A private chain is a chain in which only certain participants can participate, while an affiliate chain is a chain that allows multiple organizations or participants to participate. Compared with public chains, private chains and affiliate chains have higher transaction speed and scalability. The double-speed chain supports a variety of consensus algorithms, such as pluggable consensus mechanisms. Participants can choose the right consensus algorithm according to the actual needs, thus improving the transaction speed and scalability.

Third, the double speed chain uses distributed auditing and privacy protection technology. In a traditional blockchain system, all transaction records are publicly visible, which leads to privacy breaches and security risks. By introducing distributed audit and privacy protection technology on the chain, the transaction privacy protection and audit can be carried out. For example, the speed chain supports fine-grained control of transaction privacy and visibility between multiple organizations, enabling efficient auditing and oversight of transactions while protecting privacy.

Fourth, the double speed chain also supports smart contracts and chain codes. A smart contract is a program code that executes on-chain to automate business logic and rules. By supporting smart contracts and chain codes, a series of logical operations can be encapsulated into executable programs, thereby improving transaction speed and scalability. Smart contracts and chain codes are executed on-chain, avoiding the multiple network communications required in traditional centralized systems, thereby reducing transaction latency and resource consumption.

Finally, Double Speed Chain also provides a wealth of tools and SDKS to help developers quickly build and deploy blockchain applications. The SDK supports a variety of programming languages, such as Go, Node.js, and Java, and provides a series of apis and tools that simplify the process of developing and managing chains, improving development efficiency and scalability.

In summary, double speed chain can improve transaction speed and scalability through the adoption of distributed ledgers, private or federated chains, distributed auditing and privacy protection, smart contracts and chain codes, and rich tools and SDKS. The combined application of these technologies and methods makes Double Speed Chain an efficient, secure and scalable blockchain framework that can be widely used in different industries and fields.