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Merge pull request #7852 from ethereum/evmc-host-precompiles
EVMHost: mark precompiles as existing accounts in the constructor
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commit
7a8d0c9250
@ -86,6 +86,20 @@ EVMHost::EVMHost(langutil::EVMVersion _evmVersion, evmc::VM& _vm):
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assertThrow(false, Exception, "Berlin is not supported yet.");
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else //if (_evmVersion == langutil::EVMVersion::petersburg())
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m_evmRevision = EVMC_PETERSBURG;
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// Mark all precompiled contracts as existing. Existing here means to have a balance (as per EIP-161).
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// NOTE: keep this in sync with `EVMHost::call` below.
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//
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// A lot of precompile addresses had a balance before they became valid addresses for precompiles.
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// For example all the precompile addresses allocated in Byzantium had a 1 wei balance sent to them
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// roughly 22 days before the update went live.
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for (unsigned precompiledAddress = 1; precompiledAddress <= 8; precompiledAddress++)
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{
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evmc::address address{};
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address.bytes[19] = precompiledAddress;
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// 1wei
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m_state.accounts[address].balance.bytes[31] = 1;
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}
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}
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evmc_storage_status EVMHost::set_storage(const evmc::address& _addr, const evmc::bytes32& _key, const evmc::bytes32& _value) noexcept
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@ -70,10 +70,6 @@ public:
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Account* account(evmc::address const& _address)
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{
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// Make all precompiled contracts exist.
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// Be future-proof and consider everything below 1024 as precompiled contract.
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if (u160(convertFromEVMC(_address)) < 1024)
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m_state.accounts[_address];
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auto it = m_state.accounts.find(_address);
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return it == m_state.accounts.end() ? nullptr : &it->second;
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}
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@ -166,15 +162,15 @@ public:
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evmc::address m_coinbase = convertToEVMC(Address("0x7878787878787878787878787878787878787878"));
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private:
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evmc::result precompileECRecover(evmc_message const& _message) noexcept;
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evmc::result precompileSha256(evmc_message const& _message) noexcept;
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evmc::result precompileRipeMD160(evmc_message const& _message) noexcept;
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evmc::result precompileIdentity(evmc_message const& _message) noexcept;
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evmc::result precompileModExp(evmc_message const& _message) noexcept;
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evmc::result precompileALTBN128G1Add(evmc_message const& _message) noexcept;
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evmc::result precompileALTBN128G1Mul(evmc_message const& _message) noexcept;
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evmc::result precompileALTBN128PairingProduct(evmc_message const& _message) noexcept;
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evmc::result precompileGeneric(evmc_message const& _message, std::map<bytes, bytes> const& _inOut) noexcept;
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static evmc::result precompileECRecover(evmc_message const& _message) noexcept;
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static evmc::result precompileSha256(evmc_message const& _message) noexcept;
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static evmc::result precompileRipeMD160(evmc_message const& _message) noexcept;
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static evmc::result precompileIdentity(evmc_message const& _message) noexcept;
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static evmc::result precompileModExp(evmc_message const& _message) noexcept;
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static evmc::result precompileALTBN128G1Add(evmc_message const& _message) noexcept;
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static evmc::result precompileALTBN128G1Mul(evmc_message const& _message) noexcept;
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static evmc::result precompileALTBN128PairingProduct(evmc_message const& _message) noexcept;
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static evmc::result precompileGeneric(evmc_message const& _message, std::map<bytes, bytes> const& _inOut) noexcept;
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/// @returns a result object with no gas usage and result data taken from @a _data.
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/// @note The return value is only valid as long as @a _data is alive!
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static evmc::result resultWithGas(evmc_message const& _message, bytes const& _data) noexcept;
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