Digital currency transaction method, device and system based on block chain

Abstract

The invention discloses a digital currency transaction method, device and system based on a block chain, and the method comprises the steps: receiving a contract deployment transaction request initiated by a first user based on a first UTXO, responding to the contract deployment transaction request, generating a corresponding digital currency transaction contract, consuming the first UTXO as a gas of the deployment contract, and starting a transaction module if the first UTXO is not consumed completely; and storing the balance in a first account account of the first user in the digital currency transaction contract. By means of the scheme, the UTXO model and the Account model are combined together, and the purpose of supporting the characteristics of intelligent contracts, fragmentation and cross-chain at the same time is achieved. Moreover, according to the scheme, the balance in the third account account is transferred to the specified UTXO address, and the blinding operation is executed on the specified UTXO address, so that the purpose of privacy protection on the third account account is achieved.

Description

technical field [0001] The present invention relates to the technical field of block chain, and more specifically, relates to a digital currency transaction method, device and system based on block chain. Background technique [0002] With the advancement of blockchain technology and the development of digital currency, the use of digital currency as a voucher for transactions on the network has been widely used in transactions, consumption and other activities on the network. Digital currency is a virtual currency based on node network and digital encryption algorithm, usually issued and managed by developers, accepted and used by members of specific virtual communities. [0003] In the existing blockchain technology, it is usually divided into two types: the unspent transaction output model (UnspentTransaction Output, UTXO) represented by Bitcoin and the Account model represented by Ethereum. The UTXO model is a stateless model, and every transaction on the blockchain is ...

AI Technical Summary

Problems solved by technology

[0004] However, the Account model is suitable for smart contracts, sharding, and cross-chain. Since changes in the world state can easily leak the privacy of the owner of the state, it is difficult for the Account model to realize the privacy protection of the transaction sender, receiver, and transaction amount.

The UTXO model is suitable for privacy protection. Since the state of the UTXO model may be scattered on every transaction in the history of the blockchain, there is no aggregated collective. Therefore, when it is necessary to make a judgment on the legality of the state, it is necessary to traverse all the historical blocks, resulting in Resource consumption makes it difficult for the UTXO model to realize smart contracts, sharding and cross-chain

Therefore, no matter the UTXO model or the Account model, it is difficult to support smart contracts, sharding and cross-chain features at the same time

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