Blockchain-based transaction verification method and system

Abstract

A block chain-based transaction verification method and system, an electronic device, and a medium. The method comprises: when a node on a block chain processes a transaction, decrypt an original balance of each transaction party, calculate the original balance of each transaction party to obtain a new balance, encrypt the new balance of each transaction party to obtain encrypted new balances, and broadcast each encrypted new balance to each node of the block chain by means of an intelligent contract (S10); when the node of the block chain receives the broadcasted encrypted new balance corresponding to each transaction party, start corresponding intelligent contract to perform composite number verification (S20); if the composite number verification succeeds, the intelligent contract corresponding to each node on the block chain updates own data according to the encrypted new balance corresponding to each transaction party (S30); invoke a preset external negative balance verification system of the block chain to start a plurality of threads, each thread being responsible for performing negative balance verification on the balance of a single account of each node on the block chain (S40). According to the method, whether transaction is normal or not can be verified, and the transaction processing speed on the block chain can also be guaranteed in the case that a system overhead is not occupied.

Description

Technical field [0001] The present invention relates to the technical field of block chains, in particular to a method and system for verifying transactions based on block chains. Background technique [0002] Blockchain technology has become more and more popular with companies in the fields of finance and insurance due to its decentralization and immutability of information, especially the use of blockchain technology to achieve transactions involving multiple parties (for example, transfers) Transactions, payment transactions, etc.) have become the focus of people’s attention. For example, when Bank A wants to buy 100 notes to Bank B, if the transaction is carried out on the blockchain, then all other nodes on the blockchain will Seeing this transaction, the advantage is that other participants can participate in confirming the accuracy of the transaction and prevent information tampering. However, since there is no absolute authority node in the decentralized blockchain syst...

AI Technical Summary

Problems solved by technology

However, since there is no absolute authority node in the decentralized blockchain system, collective verification of each transaction is a necessary step, which makes the transactions of the transaction participants no secret at all, and an organization's account also May be tracked by institutions on other nodes, which brings the risk of information leakage

[0003] Although the industry currently adopts some blockchain transaction solutions to solve information leakage, the existing solutions either do not solve information leakage thoroughly, or have low computational efficiency and huge system operation overhead, which limits blockchain technology. Application in transaction scenarios

Images