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Use ethash::keccak in example_host #448

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Use ethash::keccak in example_host #448

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5 changes: 4 additions & 1 deletion examples/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -10,11 +10,14 @@ if(NOT CMAKE_CXX_STANDARD)
endif()
set(CMAKE_DEBUG_POSTFIX "")

hunter_add_package(ethash)
find_package(ethash CONFIG REQUIRED)

add_subdirectory(example_vm)
add_subdirectory(example_precompiles_vm)

add_library(evmc-example-host STATIC example_host.cpp)
target_link_libraries(evmc-example-host PRIVATE evmc)
target_link_libraries(evmc-example-host PRIVATE evmc ethash::keccak)

add_executable(evmc-example-static example.c)
target_link_libraries(evmc-example-static PRIVATE evmc-example-host evmc::example-vm-static evmc)
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10 changes: 2 additions & 8 deletions examples/example_host.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@

#include "example_host.h"

#include <ethash/keccak.hpp>
#include <evmc/evmc.hpp>

#include <algorithm>
Expand All @@ -26,14 +27,7 @@ struct account

virtual evmc::bytes32 code_hash()
{
// Extremely dumb "hash" function.
evmc::bytes32 ret{};
for (std::vector<uint8_t>::size_type i = 0; i != code.size(); i++)
{
auto v = code[i];
ret.bytes[v % sizeof(ret.bytes)] ^= v;
}
return ret;
return evmc_bytes32{*ethash::keccak256(code.data(), code.size()).bytes};
}
};

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