Implemente eos-evm gas-fee (G_txnewaccount), update unit tests

silkworm/core/execution/evm.cpp

@@ -254,13 +254,18 @@ evmc::Result EVM::call(const evmc_message& message) noexcept {
             tracer.get().on_execution_end(res.raw(),state_);
         }
     } else {
-        const ByteView code{state_.get_code(message.code_address)};
-        if (code.empty() && tracers_.empty()) {  // Do not skip execution if there are any tracers
-            return res;
-        }
+        if(message.depth == 0 && state_.is_dead(message.recipient)) {
+            if ((res.gas_left -= static_cast<int64_t>(gas_params_.G_txnewaccount)) < 0)
+                res.status_code = EVMC_OUT_OF_GAS;
+        } else {
+            const ByteView code{state_.get_code(message.code_address)};
+            if (code.empty() && tracers_.empty()) {  // Do not skip execution if there are any tracers
+                return res;
+            }
 
-        const evmc::bytes32 code_hash{state_.get_code_hash(message.code_address)};
-        res = evmc::Result{execute(message, code, &code_hash)};
+            const evmc::bytes32 code_hash{state_.get_code_hash(message.code_address)};
+            res = evmc::Result{execute(message, code, &code_hash)};
+        }
     }
 
     if (res.status_code != EVMC_SUCCESS) {

silkworm/core/execution/evm.hpp

@@ -103,6 +103,10 @@ class EVM {
       message_filter_ = message_filter;
     }
 
+    void update_gas_params(const evmone::gas_parameters& gas_params) {
+       gas_params_ = gas_params;
+    }
+
   private:
     friend class EvmHost;
 

silkworm/core/execution/evm_test.cpp

@@ -751,6 +751,42 @@ TEST_CASE("EOS EVM codedeposit test") {
     CHECK(gas-res.gas_left == 123 + 500*371); //G_codedeposit=500, codelen=371
 }
 
+TEST_CASE("EOS EVM G_txnewaccount") {
+    Block block{};
+    block.header.number = 1;
+    block.header.nonce = eosevm::version_to_nonce(1);
+
+    evmc::address sender{0x0a6bb546b9208cfab9e8fa2b9b2c042b18df7030_address};
+    evmc::address receiver{0x1a6bb546b9208cfab9e8fa2b9b2c042b18df7030_address};
+
+    evmone::gas_parameters gas_params;
+    gas_params.G_txnewaccount = 0;
+
+    InMemoryState db;
+    IntraBlockState state{db};
+    state.set_balance(sender, intx::uint256{1e18});
+    EVM evm{block, state, test::kIstanbulTrustConfig, gas_params};
+
+    Transaction txn{};
+    txn.from = sender;
+    txn.to = receiver;
+    txn.value = intx::uint256{0};
+
+    CallResult res = evm.execute(txn, 0);
+    CHECK(res.status == EVMC_SUCCESS);
+    CHECK(res.gas_left == 0);
+    CHECK(res.gas_refund == 0);
+
+    gas_params.G_txnewaccount = 1;
+    evm.update_gas_params(gas_params);
+
+    res = evm.execute(txn, 0);
+    CHECK(res.status == EVMC_OUT_OF_GAS);
+    CHECK(res.gas_refund == 0);
+    CHECK(res.gas_left == 0);
+
+}
+
 
 
 }  // namespace silkworm