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

     1  /*
     2  Copyright IBM Corp. All Rights Reserved.
     3  
     4  SPDX-License-Identifier: Apache-2.0
     5  */
     6  
     7  package common
     8  
     9  func init() {
    10  	// This is just to satisfy the code coverage tool
    11  	// miss any methods
    12  	switch true {
    13  
    14  	}
    15  }
    16  
    17  // PKIidType defines the type that holds the PKI-id
    18  // which is the security identifier of a peer
    19  type PKIidType []byte
    20  
    21  // MessageAcceptor is a predicate that is used to
    22  // determine in which messages the subscriber that created the
    23  // instance of the MessageAcceptor is interested in.
    24  type MessageAcceptor func(interface{}) bool
    25  
    26  // Payload defines an object that contains a ledger block
    27  type Payload struct {
    28  	ChainID ChainID // The channel's ID of the block
    29  	Data    []byte  // The content of the message, possibly encrypted or signed
    30  	Hash    string  // The message hash
    31  	SeqNum  uint64  // The message sequence number
    32  }
    33  
    34  // ChainID defines the identity representation of a chain
    35  type ChainID []byte
    36  
    37  // MessageReplacingPolicy Returns:
    38  // MESSAGE_INVALIDATES if this message invalidates that
    39  // MESSAGE_INVALIDATED if this message is invalidated by that
    40  // MESSAGE_NO_ACTION otherwise
    41  type MessageReplacingPolicy func(this interface{}, that interface{}) InvalidationResult
    42  
    43  // InvalidationResult determines how a message affects another message
    44  // when it is put into gossip message store
    45  type InvalidationResult int
    46  
    47  const (
    48  	// MessageNoAction means messages have no relation
    49  	MessageNoAction InvalidationResult = iota
    50  	// MessageInvalidates means message invalidates the other message
    51  	MessageInvalidates
    52  	// MessageInvalidated means message is invalidated by the other message
    53  	MessageInvalidated
    54  )