Method and device for deleting block chain data
A blockchain and block technology, applied in the field of blockchain, can solve the problems of inability to verify the validity of blocks, destroy the non-tampering characteristics of the blockchain, and achieve the effect of ensuring non-tampering characteristics and maintaining the pointing relationship.
Active Publication Date: 2022-04-12
南京金宁汇科技有限公司
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Problems solved by technology
This method can completely delete the transaction to be deleted, but the data in the block will also change accordingly, and the block hash value of the block will also change accordingly, and the legality of the block cannot be checked according to the block itself. test, destroying the immutable feature of the blockchain
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[0055] In order to facilitate the description of the technical solution of the application, some concepts involved in the application are firstly described below. First of all, the state of the world in the field of blockchain technology can be regarded as that all nodes start from the same genesis state and run the transactions in the consensus block sequentially, so that the local data state is constantly changing according to the same operation sequence, realizing all After the node executes the transaction in the same numbered block, the data state is completely consistent. The specific form of world state is a collection of key-value pairs, and each state data is a key-value pair . Secondly, transactions in blockchain technology are essentially additions, deletions, modifications and inquiries to the state of the world, that is, additions, deletions, revisions and inquiries to key-value pairs . A transaction can add, delete, modify and check a key-value pair, or add, del...
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The invention provides a method and a device for deleting block chain data. According to the method, a deletion request transaction is generated according to a target transaction, and the target transaction is a to-be-deleted transaction; when the block in which the request transaction is deleted is subjected to consensus verification, generating an alternative transaction; according to the alternative transaction and the target block, generating an alternative block and deleting the execution transaction; and after the block in which the deletion execution transaction is located is subjected to consensus verification, deleting the target transaction according to the deletion execution transaction, and replacing the target block with the replacement block. According to the method, a chained transaction is thoroughly deleted based on consensus, other irrelevant transactions are not influenced, and the pointing relationship between blocks is maintained, so that the tamper-resistant characteristic of the block chain is ensured.
Description
technical field [0001] The present application relates to the technical field of blockchain, in particular to a method and device for deleting blockchain data. Background technique [0002] The blockchain is a decentralized distributed database system that is jointly maintained by all nodes in the blockchain network. It consists of a series of data blocks generated based on cryptographic methods. Each data block is a block in the blockchain. piece. According to the order of generation time, the blocks are connected together in an orderly manner to form a data chain, which is vividly called a blockchain. The blockchain has security features that cannot be tampered with, cannot be forged, and are fully traceable. Each block includes a block header and a block body. The key information of the block is recorded in the block header, including the block hash value of the previous block, Merkle root value, block signature and other information ; The block body is composed of pac...
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Login to View More IPC IPC(8): G06Q20/38G06F21/64G06Q20/40G06F16/27G06F3/06
Inventor 石宁甘子荣李达
Owner 南京金宁汇科技有限公司