/**
 * # Running Hashes
 * The running hash values for the record stream, including current and
 * three(3) previous values.
 *
 * ### 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)
 * and clarified in [RFC8174](https://www.ietf.org/rfc/rfc8174).
 */
syntax = "proto3";

package proto;

// SPDX-License-Identifier: Apache-2.0
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 transaction records and the previous `3` running hashes.
 *
 * All hashes are 48 byte SHA384 hash values. If the running hashes do not
 * exist yet (for example, at genesis) then each not-yet-available value SHALL
 * be empty (zero-length) bytes.
 */
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;
}