github.com/decred/dcrlnd@v0.7.6/channeldb/migration_01_to_11/legacy_serialization.go (about)

     1  package migration_01_to_11
     2  
     3  import (
     4  	"io"
     5  )
     6  
     7  // deserializeCloseChannelSummaryV6 reads the v6 database format for
     8  // ChannelCloseSummary.
     9  //
    10  // NOTE: deprecated, only for migration.
    11  func deserializeCloseChannelSummaryV6(r io.Reader) (*ChannelCloseSummary, error) {
    12  	c := &ChannelCloseSummary{}
    13  
    14  	err := ReadElements(r,
    15  		&c.ChanPoint, &c.ShortChanID, &c.ChainHash, &c.ClosingTXID,
    16  		&c.CloseHeight, &c.RemotePub, &c.Capacity, &c.SettledBalance,
    17  		&c.TimeLockedBalance, &c.CloseType, &c.IsPending,
    18  	)
    19  	if err != nil {
    20  		return nil, err
    21  	}
    22  
    23  	// We'll now check to see if the channel close summary was encoded with
    24  	// any of the additional optional fields.
    25  	err = ReadElements(r, &c.RemoteCurrentRevocation)
    26  	switch {
    27  	case err == io.EOF:
    28  		return c, nil
    29  
    30  	// If we got a non-eof error, then we know there's an actually issue.
    31  	// Otherwise, it may have been the case that this summary didn't have
    32  	// the set of optional fields.
    33  	case err != nil:
    34  		return nil, err
    35  	}
    36  
    37  	if err := readChanConfig(r, &c.LocalChanConfig); err != nil {
    38  		return nil, err
    39  	}
    40  
    41  	// Finally, we'll attempt to read the next unrevoked commitment point
    42  	// for the remote party. If we closed the channel before receiving a
    43  	// funding locked message, then this can be nil. As a result, we'll use
    44  	// the same technique to read the field, only if there's still data
    45  	// left in the buffer.
    46  	err = ReadElements(r, &c.RemoteNextRevocation)
    47  	if err != nil && err != io.EOF {
    48  		// If we got a non-eof error, then we know there's an actually
    49  		// issue. Otherwise, it may have been the case that this
    50  		// summary didn't have the set of optional fields.
    51  		return nil, err
    52  	}
    53  
    54  	return c, nil
    55  }