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A method for cross-contract calling of java-based smart contracts

A smart contract, contract technology, applied in the field of blockchain, can solve the problem of lack of cross-contract calling method

Active Publication Date: 2021-08-03
HANGZHOU QULIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the development process of smart contracts, especially JAVA contracts, there has been a lack of an easy-to-use, efficient and safe cross-contract calling method

Method used

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  • A method for cross-contract calling of java-based smart contracts
  • A method for cross-contract calling of java-based smart contracts
  • A method for cross-contract calling of java-based smart contracts

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Embodiment Construction

[0029] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become clearer. The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] A cross-contract call method based on JAVA smart contracts, such as figure 1 and 2 As shown, the method specifically includes the following steps:

[0031] Step 1: Write a contract using the interface:

[0032] Define the corresponding contract methods in the contract according to business requirements. When it is necessary to reuse the tool method logic of other contracts, it can be satisfied by obtaining the interface of the library instance; when it is necessary to access contract services ...

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Abstract

The invention discloses a method for cross-contract calling of a JAVA-based smart contract. The method loads the contract class corresponding to the specified contract address ContractAddress by implementing a custom class loader, and based on the corresponding call interface based on the account book data instance on the chain Convert an object corresponding to a contract instance or a library instance. The variables in this object reflect the latest state of the contract. Users use the method of this object to use the function service of the specified contract. During the persistence stage of contract execution, all changes on the contract instance will be reflected in the ledger, that is, Modify the state of the corresponding contract account, and all changes on the library instance will be discarded, that is, the state of the corresponding contract account will not be changed. Since there are no other restrictions on the use of related interfaces, users can make multiple cross-contract calls.

Description

technical field [0001] The invention relates to blockchain technology, in particular to a method for calling a cross-contract of a JAVA-based smart contract. Background technique [0002] Blockchain technology, blockchain is a new type of decentralized protocol that can safely store digital currency transactions or other data, information cannot be forged and tampered with, and transaction confirmation on the blockchain is shared by all nodes on the blockchain Completed, the consensus algorithm guarantees its consistency. A public ledger is maintained on the blockchain. The public ledger is visible to any node on the storage block, thus ensuring that it cannot be forged and tampered with. [0003] A smart contract is an assembly language programmed on the blockchain. The term was proposed by Nick Szabo, an interdisciplinary legal scholar. His definition of a smart contract is "a smart contract is a set of commitments defined in digital form, including contract Participants ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/54G06Q40/04
CPCG06F9/548G06Q40/04
Inventor 李伟邱炜伟梁秀波尹可挺汤凯凯
Owner HANGZHOU QULIAN TECH CO LTD
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