cpp: Add Host interface for the Host side #226
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chfast
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gumb0
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examples/example_host.cpp
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| account_exists, get_storage, set_storage, get_balance, get_code_size, get_code_hash, | ||
| copy_code, selfdestruct, call, get_tx_context, get_block_hash, emit_log, | ||
| public: | ||
| bool account_exists(const evmc_address& addr) noexcept override |
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Yes, I noticed. Decided to go override because more common. I tend to not to use less common C++ features in examples. Although, in this case it might be good suggestion to use final here.
gumb0
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include/evmc/evmc.hpp
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| /// Wrapper around EVMC host context / host interface. | ||
| class host | ||
| /// | ||
| /// To be used by VM implementations as better alternative than using ::evmc_context directly. |
gumb0
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include/evmc/evmc.hpp
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| { | ||
| context->host->emit_log(context, &address, data, data_size, topics, topics_count); | ||
| } | ||
| }; | ||
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| /// Abstract class to be used by Host implementations. Hides ::evmc_context vtable. |
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Documentation here could be better. evmc_context doesn't have vtable.
Better explicitly point out, that this class should be derived when implementing Host
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This adds the Host part of the C++ API.
The plan was different, to keep it physically separated, but I realized both Host and VM sides of the API implement the same interface...
HostInterface.This introduces some naming issues. We have
HostInterfaceas pure C++ interfaceHostContextas wrapper for the host context pointer to be used by VMs, implementsHostInterface.Host- the abstract class for Host implementations, implementsHostInterface.Suggestions for better names welcome.
Effectively closes #189.
The only tunes left for C++ are aliases like
evmc::address = evmc_address, merging helpers.hpp, maybe add better types forevmc_address,evmc_uint256be, etc.