github.com/yacovm/fabric@v2.0.0-alpha.0.20191128145320-c5d4087dc723+incompatible/common/capabilities/orderer.go (about)

     1  /*
     2  Copyright IBM Corp. All Rights Reserved.
     3  
     4  SPDX-License-Identifier: Apache-2.0
     5  */
     6  
     7  package capabilities
     8  
     9  import (
    10  	cb "github.com/hyperledger/fabric-protos-go/common"
    11  )
    12  
    13  const (
    14  	ordererTypeName = "Orderer"
    15  
    16  	// OrdererV1_1 is the capabilities string for standard new non-backwards compatible Fabric v1.1 orderer capabilities.
    17  	OrdererV1_1 = "V1_1"
    18  
    19  	// OrdererV1_4_2 is the capabilities string for standard new non-backwards compatible Fabric v1.4.2 orderer capabilities.
    20  	OrdererV1_4_2 = "V1_4_2"
    21  
    22  	// OrdererV2_0 is the capabilities string that defines new Fabric v2.0 orderer capabilities.
    23  	OrdererV2_0 = "V2_0"
    24  )
    25  
    26  // OrdererProvider provides capabilities information for orderer level config.
    27  type OrdererProvider struct {
    28  	*registry
    29  	v11BugFixes bool
    30  	v142        bool
    31  	V20         bool
    32  }
    33  
    34  // NewOrdererProvider creates an orderer capabilities provider.
    35  func NewOrdererProvider(capabilities map[string]*cb.Capability) *OrdererProvider {
    36  	cp := &OrdererProvider{}
    37  	cp.registry = newRegistry(cp, capabilities)
    38  	_, cp.v11BugFixes = capabilities[OrdererV1_1]
    39  	_, cp.v142 = capabilities[OrdererV1_4_2]
    40  	_, cp.V20 = capabilities[OrdererV2_0]
    41  	return cp
    42  }
    43  
    44  // Type returns a descriptive string for logging purposes.
    45  func (cp *OrdererProvider) Type() string {
    46  	return ordererTypeName
    47  }
    48  
    49  // HasCapability returns true if the capability is supported by this binary.
    50  func (cp *OrdererProvider) HasCapability(capability string) bool {
    51  	switch capability {
    52  	// Add new capability names here
    53  	case OrdererV1_1:
    54  		return true
    55  	case OrdererV1_4_2:
    56  		return true
    57  	case OrdererV2_0:
    58  		return true
    59  	default:
    60  		return false
    61  	}
    62  }
    63  
    64  // PredictableChannelTemplate specifies whether the v1.0 undesirable behavior of setting the /Channel
    65  // group's mod_policy to "" and copying versions from the channel config should be fixed or not.
    66  func (cp *OrdererProvider) PredictableChannelTemplate() bool {
    67  	return cp.v11BugFixes || cp.v142 || cp.V20
    68  }
    69  
    70  // Resubmission specifies whether the v1.0 non-deterministic commitment of tx should be fixed by re-submitting
    71  // the re-validated tx.
    72  func (cp *OrdererProvider) Resubmission() bool {
    73  	return cp.v11BugFixes || cp.v142 || cp.V20
    74  }
    75  
    76  // ExpirationCheck specifies whether the orderer checks for identity expiration checks
    77  // when validating messages
    78  func (cp *OrdererProvider) ExpirationCheck() bool {
    79  	return cp.v11BugFixes || cp.v142 || cp.V20
    80  }
    81  
    82  // ConsensusTypeMigration checks whether the orderer permits a consensus-type migration.
    83  //
    84  // A Kafka-based Ordering Service Node requires these capabilities in order to receive and process a config update
    85  // with consensus-type migration change. Migration is supported from Kafka to Raft only.
    86  // If not present, these config updates will be rejected.
    87  func (cp *OrdererProvider) ConsensusTypeMigration() bool {
    88  	return cp.v142 || cp.V20
    89  }
    90  
    91  // UseChannelCreationPolicyAsAdmins determines whether the orderer should use the name
    92  // "Admins" instead of "ChannelCreationPolicy" in the new channel config template.
    93  func (cp *OrdererProvider) UseChannelCreationPolicyAsAdmins() bool {
    94  	return cp.V20
    95  }