Method for writing data into blockchain based on blockchain smart contract

Abstract

The invention relates to a method for writing data into blockchain based on a blockchain smart contract. The method comprises the following steps: S1, when calling data for storage, a smart contract automatically writes data into a storage area of a blockchain, and calls a uuid algorithm to randomly generate a key value for returning; S2, when data query is called, a key value is transmitted in, and at the moment, the smart contract can query corresponding data according to the key value and returns the data; and S3, the key value and the block height or block hash contained in the calling ofthe smart contract in the upper application layer are stored as the traceability field added by the block, and a block chain browser is called directly to check the block information. According to theinvention, the smart contract of the block chain is adopted to carry out data uploading operation, the smart contract is a code issued to the block chain in advance, and the code can be called by a miner so as to execute some characteristic operations. At a predefined interface of writing data into a block chain, the interface can be accessed at any time and data can be written into a chain.

Description

technical field [0001] The present invention relates to the technical field of block chains, in particular to a data uploading method based on block chain smart contracts. Background technique [0002] The rapid development of blockchain technology makes it possible for blockchain to be applied in all walks of life. In the actual application of blockchain, data is usually uploaded to the blockchain, and the characteristics of the blockchain are used to ensure data security. It cannot be tampered with, and this process is called data on-chain. [0003] In the existing technology, some basic data is uploaded to the chain with each transaction through the transaction process of the blockchain. In this way, a transaction is performed every time a piece of data is uploaded to the chain, which makes the process very slow. The amount of data on the chain is very limited, and the type is still a fixed string. This chaining method is difficult to apply in many practical application...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, some basic data is uploaded to the chain with each transaction through the transaction process of the blockchain. In this way, a transaction is performed every time a piece of data is uploaded to the chain, which makes the process very slow. The amount of data on the chain is very limited, and the type is still a fixed string

This chaining method is difficult to apply in many practical application scenarios, and because of data limitations, the use of the blockchain is quite simple, and various advanced features of the blockchain cannot be really used, such as decentralization.

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