feat: expose building a CompiledPlugin with a fuel limit #883
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nilslice
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LGTM - fine to accept this without exposing a Rust SDK wrapper function for now until someone needs it or I have time to follow-up.
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This follows extism/extism#883 and Extism 1.13.0, which allows to create a CompiledPlugin with a fuel limit. Previously, we could only create a (non-compiled) Plugin with a fuel limit, or a CompiledPlugin without a fuel limit. A CompiledPlugin with a fuel limit is interesting for the scenario where: - the host is instantiating many times the same wasm file (for example, a Python interpreter) - and needs a fuel limit to ensure resource usage is controlled while running untrusted scripts On practical example is when using Extism to implement a Python sandbox in a .NET host, that is exposed as a tool to an LLM chatbot embedded in the app. The LLM can generate Python code that calls host functions or perform calculations to fulfill the user's request. Setting a fuel limit is important for the security of the approach, since the executed code cannot be trusted, as it is produced by the LLM. The fuel limit ensures that resources stay in check, along with memory limits, time-based cancellation, and the isolation properties of WASM. Until now, we could only use the non-compiled Plugin, since this one exposes the fuel limit. But it makes sense to use the CompiledPlugin, since the same wasm (the Python interpreter) is used over and over again.
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Expose a new method
extism_compiled_plugin_new_with_fuel_limitto build a CompiledPlugin with a fuel limit.Fixes #882