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examples: add support code account::code_hash and also derive code_size from code

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Alex Beregszaszi 2019-08-08 18:43:36 +02:00 committed by Paweł Bylica
parent e3dc816263
commit 2536d50cff
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1 changed files with 14 additions and 4 deletions
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18
examples/example_host.cpp
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@ -18,10 +18,20 @@ using namespace evmc::literals;
struct account
{
evmc::uint256be balance = {};
size_t code_size = 0;
evmc::bytes32 code_hash = {};
std::vector<uint8_t> code;
std::map<evmc::bytes32, evmc::bytes32> storage;
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;
}
};
class ExampleHost : public evmc::Host
@ -69,7 +79,7 @@ public:
{
auto it = accounts.find(addr);
if (it != accounts.end())
return it->second.code_size;
return it->second.code.size();
return 0;
}
@ -77,7 +87,7 @@ public:
{
auto it = accounts.find(addr);
if (it != accounts.end())
return it->second.code_hash;
return it->second.code_hash();
return {};
}