github.com/muhammedhassanm/blockchain@v0.0.0-20200120143007-697261defd4d/sawtooth-core-master/validator/src/execution/execution_platform.rs (about)

     1  /*
     2   * Copyright 2018 Intel Corporation
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   * ------------------------------------------------------------------------------
    16   */
    17  
    18  use cpython;
    19  
    20  use scheduler::Scheduler;
    21  
    22  /// The logical state hash before state has been added to the
    23  /// merkle database. May not be the actual first state hash due to
    24  /// implementation details of the merkle database.
    25  pub const NULL_STATE_HASH: &str = "";
    26  
    27  pub trait ExecutionPlatform: Sync + Send {
    28      fn create_scheduler(&self, state_hash: &str) -> Result<Box<Scheduler>, cpython::PyErr>;
    29  }