Add EVM automine and mine functionality

include/ethyl/provider.hpp

@@ -93,6 +93,14 @@ struct Provider : public std::enable_shared_from_this<Provider> {
     void evm_snapshot_async(json_result_callback cb);
     bool evm_revert(std::string_view snapshotId);
 
+    // Enables or disables, based on the single boolean argument, the automatic
+    // mining of new blocks with each new transaction submitted to the network.
+    // You can use hardhat_getAutomine to get the current value.
+    bool evm_setAutomine(bool enable);
+
+    // Force a block to be mined. Takes no parameters. Mines a block independent
+    // of whether or not mining is started or stopped.
+    bool evm_mine();
     uint64_t evm_increaseTime(std::chrono::seconds seconds);
 
     std::optional<nlohmann::json> getTransactionByHash(std::string_view transactionHash);

src/provider.cpp

@@ -341,6 +341,18 @@ void Provider::evm_snapshot_async(json_result_callback cb) {
     makeJsonRpcRequest("evm_snapshot", params, std::move(cb));
 }
 
+bool Provider::evm_setAutomine(bool enable) {
+    nlohmann::json params = nlohmann::json::array();
+    params.push_back(enable);
+    std::optional<nlohmann::json> result = makeJsonRpcRequest("evm_setAutomine", params);
+    return result.has_value();
+}
+
+bool Provider::evm_mine() {
+    std::optional<nlohmann::json> result = makeJsonRpcRequest("evm_mine", nlohmann::json::array());
+    return result.has_value();
+}
+
 bool Provider::evm_revert(std::string_view snapshotId) {
     nlohmann::json params = nlohmann::json::array();
     params.push_back(snapshotId);