Added state for blocks and running hashes (#276)

* Added state for blocks and running hashes

Signed-off-by: jasperpotts <jasperpotts@users.noreply.github.com>

---------

Signed-off-by: jasperpotts <jasperpotts@users.noreply.github.com>
Co-authored-by: jasperpotts <jasperpotts@users.noreply.github.com>

services/state/blockrecords/block_info.proto

@@ -0,0 +1,50 @@
+syntax = "proto3";
+
+package proto;
+
+/*-
+ * ‌
+ * Hedera Network Services Protobuf
+ * ​
+ * Copyright (C) 2018 - 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.
+ * ‍
+ */
+
+import "timestamp.proto";
+
+option java_package = "com.hederahashgraph.api.proto.java";
+// <<<pbj.java_package = "com.hedera.hapi.node.state.blockrecords">>> This comment is special code for setting PBJ Compiler java package
+option java_multiple_files = true;
+
+/**
+ * Information about the most recently completed and last 256 blocks.
+ */
+message BlockInfo {
+  /**
+   * The last block number, this is the last completed immutable block.
+   */
+  int64 last_block_no = 1;
+  /**
+   * The consensus time of the first transaction of the last block, this is the last completed immutable block.
+   */
+  Timestamp first_cons_time_of_last_block = 2;
+  /**
+   * SHA384 48 byte hashes of the last 256 blocks in single byte array.
+   * First 48 bytes is the oldest block.
+   * Last 48 bytes is the newest block, which is the last fully completed immutable block.
+   * If we are shortly after genesis and there are less than 256 blocks then this could contain less than 256 hashes.
+   */
+  bytes block_hashes = 3;
+}

services/state/blockrecords/running_hashes.proto

@@ -0,0 +1,50 @@
+syntax = "proto3";
+
+package proto;
+
+/*-
+ * ‌
+ * Hedera Network Services Protobuf
+ * ​
+ * Copyright (C) 2018 - 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.
+ * ‍
+ */
+
+option java_package = "com.hederahashgraph.api.proto.java";
+// <<<pbj.java_package = "com.hedera.hapi.node.state.blockrecords">>> This comment is special code for setting PBJ Compiler java package
+option java_multiple_files = true;
+
+/**
+ * The running hash of a transaction records and the previous 3 running hashes. All hashes are 48 bytes SHA384 hashes. If the
+ * running hashes do not exist yet then they will be default values witch is empty bytes object or zero length byte array.
+ */
+message RunningHashes {
+  /**
+   * A running hash of all record stream items
+   */
+  bytes running_hash = 1;
+  /**
+   * The previous running hash of all record stream items
+   */
+  bytes n_minus_1_running_hash = 2;
+  /**
+   * The previous, previous running hash of all record stream items
+   */
+  bytes n_minus_2_running_hash = 3;
+  /**
+   * The previous, previous, previous running hash of all record stream items
+   */
+  bytes n_minus_3_running_hash = 4;
+}