US 2025/0199778 A1Published application

Implementing reflection mechanism in blockchain

AssigneeAnt Blockchain Technology (Shanghai) Co., Ltd.

InventorWei Zhou

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Abstract

Methods, apparatuses, and computer-readable media for implementing a reflection mechanism in a blockchain are described. In an example process, a compiler compiles contract source code comprising reflective programming into a Wasm file. The compiler generates metadata of a first type and a first function in the first type, and packages the metadata in the Wasm file; and generates contract bytecode of a second function that obtains a first function type and first function content according to dynamic parameters. After receiving a transaction that calls a contract, a virtual machine loads the Wasm file, uses the metadata in the Wasm file to initialize a part of a memory in a created linear memory region; and parses and executes the contract bytecode in the Wasm file. When executing the bytecode of the second function, the virtual machine determines and executes, based on the metadata, the first function in the linear memory region.

Claims20

Dependent claims

A method for implementing a reflection mechanism in a blockchain, comprising:

in a process that a compiler compiles contract source code that comprises reflective programming into a Wasm file:
according to code that defines a first type in the contract source code or bytecode, generating, by the compiler, metadata of the first type and a first function in the first type;
packaging, by the compiler, the metadata of the first type and the first function in the first type in the Wasm file;
and
according to reflection code in the contract source code, generating, by the compiler, contract bytecode of a second function that obtains a first function type and first function content according to dynamic parameters during running;
and
after receiving a transaction that calls a contract, loading, by a virtual machine, the Wasm file of the contract;
creating, by the virtual machine, a linear memory region;
using, by the virtual machine, the metadata in the Wasm file to initialize at least a part of a memory in the linear memory region;
and
parsing and executing, by the virtual machine, the contract bytecode in the Wasm file;
and
when executing the contract bytecode of the second function, according to the dynamic parameters for function calling in the transaction that calls the contract, determining and executing, by the virtual machine based on the metadata, the first function in the linear memory region.

10 more elements

Dependencies are inferred from the claim text.