Advanced New Technologies Co., Ltd.

Alipay (Hangzhou) Information Technology Co., Ltd.

Huawei Technologies Co., Limited

Alibaba Group Holding Limited

Zhejiang University

Alipay Information Technology Co., Ltd.

Qi Liu

Ying Yan

Changzheng Wei

Boran Zhao

Jian Ding

Yanlan Wei

Xuepeng Guo

Jianhua Yan

Shengyong Lu

Minghui Tang

Hongxian Li

Zhiyuan Gong

A transaction method and a node design in a blockchain system, where a client initiates a transaction using a Structured Query Language (SQL) write command including transaction data or queries transaction data using an SQL query command. A node parses an SQL command, executes a simulated transaction, and checks block data based on a transaction result of the simulated transaction after obtaining the block data. After the check succeeds, the node converts the block data into an SQL write command that writes the block data, thereby writing the block data to a relational database.

Blockchain node and transaction method

Amine-supported mesoporous carbon and a preparation method and use thereof are provided. The preparation method includes: dissolving glucosamine hydrochloride completely in deionized water; adding aqueous colloidal silica dropwise under stirring for full dispersion; heating, stirring, and conducting evaporation to dryness; grinding to obtain a powder, adding the powder to a crucible, and conducting a hydrothermal reaction to obtain a black powder; oven-drying the black powder, and conducting carbonization in a muffle furnace in a protective gas environment to obtain a carbonized solid; adding the carbonized solid to an ammonium hydrogen fluoride solution to remove silica; repeatedly washing with deionized water, and drying in an oven to obtain nitrogen-doped mesoporous carbon (NC); adding the NC to an amine solution prepared with absolute ethanol, and stirring for full dispersion; and stirring a mixed solution in an oil bath until the absolute ethanol is completely evaporated to obtain the amine-supported mesoporous carbon.

Amine-supported mesoporous carbon and preparation method and use thereof

A transaction method and a node design in a blockchain system, where a client initiates a transaction using a Structured Query Language (SQL) write command including transaction data or queries transaction data using an SQL query command. A node parses an SQL command, executes a simulated transaction, and checks block data based on a transaction result of the simulated transaction after obtaining the block data. After the check succeeds, the node converts the block data into an SQL write command that writes the block data, thereby writing the block data to a relational database (RDB).

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for deploying a smart contract in a blockchain network. The computer-implemented method includes: receiving, by a blockchain node in a blockchain network, a transaction for creating a smart contract, wherein the transaction comprises machine codes of the smart contract, and the machine codes of the smart contract are obtained by a compilation service provider performing Ahead of Time (AoT) compilation on bytecodes of the smart contract; determining, by the blockchain node, that the machine codes of the smart contract are obtained by a trusted compilation service provider; and in response to determining that the machine codes of the smart contract are obtained by the trusted compilation service provider, completing, by the blockchain node, a deployment of the smart contract.

Methods, blockchain nodes, and storage media for deploying smart contract

Methods, systems, and apparatus for executing a smart contract by a blockchain node of a blockchain. An example method includes receiving bytecode of a smart contract; deploying the smart contract, comprising storing the bytecode of the smart contract on the blockchain; compiling, through Just-In-Time (JIT) compilation, the bytecode of the smart contract into machine code; locally storing the machine code in a memory of the blockchain node; and executing the smart contract deployed on the blockchain, comprising determining whether the machine code corresponding to the bytecode of the smart contract is locally stored in the memory of the blockchain node, and interpreting and executing the bytecode of the smart contract if the machine code corresponding to the bytecode of the smart contract is not locally stored.

Methods, blockchain nodes, and storage media for executing smart contract

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for deploying a smart contract in a blockchain network. The computer-implemented method includes: receiving, by a blockchain node in a blockchain network, a transaction for creating a smart contract, wherein the transaction comprises a machine code of the smart contract, and the machine code of the smart contract is obtained by Ahead of Time (AoT) compilation of a bytecode of the smart contract in a first trusted execution environment (TEE); determining, by the blockchain node, that the machine code of the smart contract is obtained in a trusted TEE; and in response to determining that the machine code of the smart contract is obtained by the trusted TEE, completing, by the blockchain node, a deployment of the smart contract.

Methods, blockchain nodes and storage media for deploying smart contract

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for executing a smart contract in a blockchain network. The computer-implemented method includes, in response to determining that a smart contract is deployed on a blockchain node in a blockchain network comprising a plurality of blockchain nodes, starting, by the blockchain node, to turn a bytecode of the smart contract into a machine code of the smart contract through Just-In-Time (JIT) compilation; storing, by the blockchain node, the machine code of the smart contract locally; performing a determination of whether the machine code of the smart contract is stored locally by the blockchain node and a number of blockchain nodes storing the machine code of the smart contract in the blockchain network is not less than a predetermined number; and executing, by the blockchain node, the smart contract based on the determination.

Methods, blockchain nodes and storage media for executing smart contracts

Computer-implemented methods, non-transitory, computer-readable media, and computer-implemented systems are provided for executing a smart contract in a blockchain network. A computer-implemented method includes: in response to determining that bytecodes of a smart contract are deployed on a first blockchain node in a blockchain network, starting, by the first blockchain node, to compile the bytecodes of the smart contract into machine codes of the smart contract through a Just-In-Time (JIT) compiler; determining, by the first blockchain node, that the machine codes of the smart contract are not locally stored and that execution results of the machine codes of the smart contract and the bytecodes of the smart contract are consistent; and in response to the determining, performing, by the first blockchain node, interpretation execution on the bytecodes of the smart contract.

Methods, blockchain nodes, systems and storage media for executing smart contract

The present specification provides a method for executing a smart contract and a blockchain node. An implementation of a method for executing a smart contract includes: receiving, by a blockchain node, a request for creating a smart contract, the request including a bytecode of the smart contract; starting, by the blockchain node after completing deployment of the smart contract, to compile the bytecode of the smart contract into a machine code by using just-in-time and storing the machine code; and in execution of the deployed smart contract, executing, by the blockchain node, the machine code corresponding to a bytecode of the smart contract in response to the machine code being locally stored. According to the above implementations of the present application, the blockchain node can greatly increase a speed of executing a smart contract.

Method for executing smart contract and blockchain node

Examples of a data transmission method and apparatus in TEE systems are described. One example of the method includes: obtaining first data; obtaining a write offset address by reading a first address; obtaining a read offset address by reading a second address; determining whether the number of bytes in the first data is less than or equal to the number of writable bytes, where the number of writable bytes is determined based on the write offset address and the read offset address, and each address corresponds to one byte; when the number of bytes in the first data is less than or equal to the number of writable bytes, writing the first data into third addresses starting from the write offset address; and updating the write offset address in the first address.

Data transmission method and apparatus in tee systems

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for data transmission in a trusted execution environment (TEE) system. The method can be executed by a thread on a TEE side of the TEE system. The method includes obtaining first data; calling a predetermined function using the first data as an input parameter to switch to a non-TEE side; obtaining a write offset address by reading a first address; obtaining a read offset address by reading a second address; determining whether a quantity of bytes of the first data is less than or equal to a quantity of writable bytes; if so, writing the first data into third addresses starting from the write offset address; updating the write offset address in the first address; and returning to the TEE side.

Method and apparatus for data transmission in a TEE system

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for data transmission in a trusted execution environment (TEE) system. The method is executed by a first thread in multiple threads on a TEE side. The method includes obtaining first data; obtaining a TEE side thread lock; calling a predetermined function by using the first data as an input parameter to switch to a non-TEE side; obtaining a write offset address and a read offset address respectively by reading a first address and a second address; determining whether a quantity of bytes of the first data is less than or equal to a quantity of writable bytes; if so, writing the first data into third addresses starting from the write offset address; updating the write offset address in the first address; returning to the TEE side; and releasing the TEE side thread lock.

Method and apparatus for multithreaded data transmission in a TEE system

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for data transmission in a trusted execution environment (TEE) system. The method executed by a first thread in multiple threads on a TEE side includes: obtaining first data; obtaining a TEE side thread lock; obtaining a write offset address and a read offset address respectively by reading a first address and a second address; determining whether a quantity of bytes of the first data to be transmitted is less than or equal to a quantity of writable bytes; if the quantity of bytes of the first data is less than or equal to the quantity of writable bytes, writing the first data into third addresses starting from the write offset address; updating the write offset address in the first address; and releasing the TEE side thread lock.

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Hangzhou, China

Qi Liu