Function createDeliverEnvelope

integration/pvtdata/pvtdata_test.go:1163–1218

createDeliverEnvelope creates a deliver request based on the block number. blockNum=0 means newest block

(channelID string, signingIdentity *nwo.SigningIdentity, blockNum uint64)

// createDeliverEnvelope creates a deliver request based on the block number.
// blockNum=0 means newest block
func createDeliverEnvelope(channelID string, signingIdentity *nwo.SigningIdentity, blockNum uint64) (*cb.Envelope, error) {
	creator, err := signingIdentity.Serialize()
	if err != nil {
		return nil, err
	}
	header, err := createHeader(cb.HeaderType_DELIVER_SEEK_INFO, channelID, creator)
	if err != nil {
		return nil, err
	}

	// if blockNum is not greater than 0, seek the newest block
	var seekInfo *ab.SeekInfo
	if blockNum > 0 {
		seekInfo = &ab.SeekInfo{
			Start: &ab.SeekPosition{
				Type: &ab.SeekPosition_Specified{
					Specified: &ab.SeekSpecified{Number: blockNum},
				},
			},
			Stop: &ab.SeekPosition{
				Type: &ab.SeekPosition_Specified{
					Specified: &ab.SeekSpecified{Number: blockNum},
				},
			},
		}
	} else {
		seekInfo = &ab.SeekInfo{
			Start: &ab.SeekPosition{
				Type: &ab.SeekPosition_Newest{
					Newest: &ab.SeekNewest{},
				},
			},
			Stop: &ab.SeekPosition{
				Type: &ab.SeekPosition_Newest{
					Newest: &ab.SeekNewest{},
				},
			},
		}
	}

	// create the envelope
	raw := protoutil.MarshalOrPanic(seekInfo)
	payload := &cb.Payload{
		Header: header,
		Data:   raw,
	}
	payloadBytes := protoutil.MarshalOrPanic(payload)
	signature, err := signingIdentity.Sign(payloadBytes)
	if err != nil {
		return nil, err
	}
	return &cb.Envelope{
		Payload:   payloadBytes,
		Signature: signature,
	}, nil
}

func createHeader(txType cb.HeaderType, channelID string, creator []byte) (*cb.Header, error) {