github.com/myafeier/fabric@v1.0.1-0.20170722181825-3a4b1f2bce86/orderer/common/bootstrap/file/bootstrap.go (about)

     1  /*
     2  Copyright IBM Corp. 2016 All Rights Reserved.
     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  package file
    18  
    19  import (
    20  	"fmt"
    21  	"io/ioutil"
    22  
    23  	"github.com/hyperledger/fabric/orderer/common/bootstrap"
    24  	cb "github.com/hyperledger/fabric/protos/common"
    25  
    26  	"github.com/golang/protobuf/proto"
    27  )
    28  
    29  type fileBootstrapper struct {
    30  	GenesisBlockFile string
    31  }
    32  
    33  // New returns a new static bootstrap helper
    34  func New(fileName string) bootstrap.Helper {
    35  	return &fileBootstrapper{
    36  		GenesisBlockFile: fileName,
    37  	}
    38  }
    39  
    40  // GenesisBlock returns the genesis block to be used for bootstrapping
    41  func (b *fileBootstrapper) GenesisBlock() *cb.Block {
    42  	bootstrapFile, fileErr := ioutil.ReadFile(b.GenesisBlockFile)
    43  	if fileErr != nil {
    44  		panic(fmt.Errorf("Unable to bootstrap orderer. Error reading genesis block file: %v", fileErr))
    45  	}
    46  	genesisBlock := &cb.Block{}
    47  	unmarshallErr := proto.Unmarshal(bootstrapFile, genesisBlock)
    48  	if unmarshallErr != nil {
    49  		panic(fmt.Errorf("Unable to bootstrap orderer. Error unmarshalling genesis block: %v", unmarshallErr))
    50  
    51  	}
    52  	return genesisBlock
    53  } // GenesisBlock