Method and system for anchoring trustable external database by blockchain intelligent contract

Abstract

The invention discloses a method and system for anchoring a trustable external database by a blockchain intelligent contract, and the method comprises the steps: peeling the data of the intelligent contract from the storage space of the intelligent contract, and storing the data in a database under any type of chain; adding a fixed-length hash to a continuous storage layer of the smart contract torepresent Merkel tree root hash of the under-chain external database mapped by the smart contract; if the data need to be inserted into the smart contract or the data need to be deleted from the smart contract or the data needs to be called; according to the invention, the Merkel tree, which is a data structure, is utilized to compress the infinite data set into the Hash with a certain length tooptimize the virtual space of the continuous storage of the intelligent contract; in the process of adding, deleting, modifying and checking external data, the verification overhead of the smart contract is always kept within a reasonable range by utilizing the characteristics of the balance tree, and block chain node CPU resources within the reasonable range are fully utilized to replace storageresources under a trusted chain which is nearly free of an upper limit.

Description

technical field [0001] The invention belongs to the technical field of blockchain, and in particular relates to a method and system for anchoring a trusted external database with a blockchain smart contract. Background technique [0002] Blockchain technology is a decentralized distributed database technology with various characteristics such as decentralization, openness and transparency, non-tampering, and trustworthiness, and is suitable for many application scenarios that have high requirements for data reliability. [0003] A smart contract is a script executed on the upper layer of the blockchain, which has the characteristics of Turing completeness and high plasticity. Users can implement complex business logic in the form of smart contracts, and by handing over the smart contracts to the underlying hosting model of the blockchain, the business model that requires multi-party trust can be completed without trust. [0004] The precondition for smart contracts to achie...

AI Technical Summary

Problems solved by technology

However, the nature of the blockchain as a decentralized database determines that it is difficult to store a large amount of data for a single application like a traditional database, thus limiting the difficulty of carrying large-scale applications with massive data

[0005] The smart contract at this stage supports the operation of the smart contract by continuously storing data in the KV storage space of the smart contract. The upper limit of the KV storage space of the smart contract limits the depth of data that the smart contract can process

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