Add CreateTopicExample

sdk/examples/CMakeLists.txt

@@ -12,6 +12,7 @@ set(CREATE_FILE_EXAMPLE_NAME ${PROJECT_NAME}-create-file-example)
 set(CREATE_ACCOUNT_THRESHOLD_KEY_EXAMPLE_NAME ${PROJECT_NAME}-create-account-threshold-key-example)
 set(CREATE_SIMPLE_CONTRACT_EXAMPLE_NAME ${PROJECT_NAME}-create-simple-contract-example)
 set(CREATE_STATEFUL_CONTRACT_EXAMPLE_NAME ${PROJECT_NAME}-create-stateful-contract-example)
+set(CREATE_TOPIC_EXAMPLE_NAME ${PROJECT_NAME}-create-topic-example)
 set(CONTRACT_NONCES_EXAMPLE_NAME ${PROJECT_NAME}-contract-nonces-example)
 set(CUSTOM_FEES_EXAMPLE_NAME ${PROJECT_NAME}-custom-fees-example)
 set(DELETE_ACCOUNT_EXAMPLE_NAME ${PROJECT_NAME}-delete-account-example)
@@ -49,6 +50,7 @@ add_executable(${CREATE_FILE_EXAMPLE_NAME} CreateFileExample.cc)
 add_executable(${CREATE_ACCOUNT_THRESHOLD_KEY_EXAMPLE_NAME} CreateAccountThresholdKeyExample.cc)
 add_executable(${CREATE_SIMPLE_CONTRACT_EXAMPLE_NAME} CreateSimpleContractExample.cc)
 add_executable(${CREATE_STATEFUL_CONTRACT_EXAMPLE_NAME} CreateStatefulContractExample.cc)
+add_executable(${CREATE_TOPIC_EXAMPLE_NAME} CreateTopicExample.cc)
 add_executable(${CONTRACT_NONCES_EXAMPLE_NAME} ContractNoncesExample.cc)
 add_executable(${CUSTOM_FEES_EXAMPLE_NAME} CustomFeesExample.cc)
 add_executable(${DELETE_ACCOUNT_EXAMPLE_NAME} DeleteAccountExample.cc)
@@ -106,6 +108,7 @@ target_link_libraries(${CREATE_FILE_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${CREATE_ACCOUNT_THRESHOLD_KEY_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${CREATE_SIMPLE_CONTRACT_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${CREATE_STATEFUL_CONTRACT_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
+target_link_libraries(${CREATE_TOPIC_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${CONTRACT_NONCES_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${CUSTOM_FEES_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
 target_link_libraries(${DELETE_ACCOUNT_EXAMPLE_NAME} PUBLIC ${PROJECT_NAME})
@@ -146,6 +149,7 @@ install(TARGETS
         ${CREATE_ACCOUNT_THRESHOLD_KEY_EXAMPLE_NAME}
         ${CREATE_SIMPLE_CONTRACT_EXAMPLE_NAME}
         ${CREATE_STATEFUL_CONTRACT_EXAMPLE_NAME}
+        ${CREATE_TOPIC_EXAMPLE_NAME}
         ${CONTRACT_NONCES_EXAMPLE_NAME}
         ${CUSTOM_FEES_EXAMPLE_NAME}
         ${DELETE_ACCOUNT_EXAMPLE_NAME}

sdk/examples/CreateTopicExample.cc

@@ -0,0 +1,61 @@
+/*-
+ *
+ * Hedera C++ SDK
+ *
+ * Copyright (C) 2020 - 2023 Hedera Hashgraph, LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License")
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+#include "Client.h"
+#include "ED25519PrivateKey.h"
+#include "Status.h"
+#include "TopicCreateTransaction.h"
+#include "TopicId.h"
+#include "TopicMessageSubmitTransaction.h"
+#include "TransactionReceipt.h"
+#include "TransactionResponse.h"
+
+#include <iostream>
+
+using namespace Hedera;
+
+int main(int argc, char** argv)
+{
+  if (argc < 3)
+  {
+    std::cout << "Please input account ID and private key" << std::endl;
+    return 1;
+  }
+
+  // Get a client for the Hedera testnet, and set the operator account ID and key such that all generated transactions
+  // will be paid for by this account and be signed by this key.
+  Client client = Client::forTestnet();
+  client.setOperator(AccountId::fromString(argv[1]), ED25519PrivateKey::fromString(argv[2]));
+
+  // Create a new topic.
+  const TopicId topicId = TopicCreateTransaction().execute(client).getReceipt(client).mTopicId.value();
+  std::cout << "Created new topic with ID " << topicId.toString() << std::endl;
+
+  // Submit a message on this topic.
+  std::cout << "Submitting message: "
+            << gStatusToString.at(TopicMessageSubmitTransaction()
+                                    .setTopicId(topicId)
+                                    .setMessage("Hello world!")
+                                    .execute(client)
+                                    .getReceipt(client)
+                                    .mStatus)
+            << std::endl;
+
+  return 0;
+}