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/**
 * # State Signature Transaction
 * An signature of a state snapshot gossiped to other nodes.
 *
 * ### Keywords
 * The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
 * "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
 * document are to be interpreted as described in [RFC2119](https://www.ietf.org/rfc/rfc2119).
 */
syntax = "proto3";

package com.hedera.hapi.platform.event;

/*
 * Hedera Network Services Protobuf
 *
 * Copyright (C) 2018 - 2024 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.hedera.hapi.platform.event.legacy";
// <<>> This comment is special code for setting PBJ Compiler java package
option java_multiple_files = true;

/**
 * An signature of a state snapshot gossiped to other nodes.
 * Each node SHALL hash the root of the merkle tree of a state snapshot every
 * round. Once this hash is calculated, it SHOULD be signed with the nodes
 * private signing key. This signature, together with the hash SHOULD be added
 * to an event as a StateSignatureTransaction.
 */
message StateSignatureTransaction {

  /**
   * The round number corresponding to the round number of the state snapshot
   * being signed.

   * This number MUST be greater than 0.
   */
  int64 round = 1;

  /**
   * The signature of state snapshot hash.

   * This signature MUST be a RSA signature with a maximum length of 384 bytes.

   * The signature algorithm used MUST be RSASSA-PKCS1-v1_5 with SHA-384.
   */
  bytes signature = 2;

  /**
   * The hash of the state snapshot being signed.

   * This hash MUST be a SHA-384 hash.
   */
  bytes hash = 3;
}