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EVMHost: mark precompiles as existing accounts in the constructor

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This commit is contained in:
Alex Beregszaszi 2019-11-30 01:02:27 +01:00
parent 578d69983d
commit 2a62425f0a
2 changed files with 14 additions and 4 deletions
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14
test/EVMHost.cpp
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@ -86,6 +86,20 @@ EVMHost::EVMHost(langutil::EVMVersion _evmVersion, evmc::VM& _vm):
assertThrow(false, Exception, "Berlin is not supported yet.");
else //if (_evmVersion == langutil::EVMVersion::petersburg())
m_evmRevision = EVMC_PETERSBURG;
// Mark all precompiled contracts as existing. Existing here means to have a balance (as per EIP-161).
// NOTE: keep this in sync with `EVMHost::call` below.
//
// A lot of precompile addresses had a balance before they became valid addresses for precompiles.
// For example all the precompile addresses allocated in Byzantium had a 1 wei balance sent to them
// roughly 22 days before the update went live.
for (unsigned precompiledAddress = 1; precompiledAddress <= 8; precompiledAddress++)
{
evmc::address address{};
address.bytes[19] = precompiledAddress;
// 1wei
m_state.accounts[address].balance.bytes[31] = 1;
}
}
evmc_storage_status EVMHost::set_storage(const evmc::address& _addr, const evmc::bytes32& _key, const evmc::bytes32& _value) noexcept

4
test/EVMHost.h
View File

@ -70,10 +70,6 @@ public:
Account* account(evmc::address const& _address)
{
// Make all precompiled contracts exist.
// Be future-proof and consider everything below 1024 as precompiled contract.
if (u160(convertFromEVMC(_address)) < 1024)
m_state.accounts[_address];
auto it = m_state.accounts.find(_address);
return it == m_state.accounts.end() ? nullptr : &it->second;
}