util_service.proto

/**
 * # Utility Service
 * This service provides a transaction to generate a deterministic
 * pseudo-random value, either a 32-bit integer within a requested range
 * or a 384-bit byte array.
 *
 * ### 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;

/*
 * 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.hederahashgraph.service.proto.java";
// <<<pbj.java_package = "com.hedera.hapi.node.util">>> This comment is special code for setting PBJ Compiler java package

import "transaction_response.proto";
import "transaction.proto";

/**
 * The Utility Service provides a pseudo-random number generator.
 *
 * The single gRPC call defined for this service simply reports a single
 * pseudo-random number in the transaction record. That value may either
 * be a 32-bit integer within a requested range, or a 384-bit byte array.
 *
 * ### Block Stream Effects
 * The requested value is reported exclusively in a `UtilPrngOutput` message.
 */
service UtilService {
    /**
     * Generate a pseudo-random value.
       * <p>
       * The request body MUST be a
       * [UtilPrngTransactionBody](#proto.UtilPrngTransactionBody)
     */
    rpc prng (Transaction) returns (TransactionResponse);
}