87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
package wtwire
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import (
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"io"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/watchtower/blob"
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)
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// CreateSession is sent from a client to tower when to negotiate a session, which
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// specifies the total number of updates that can be made, as well as fee rates.
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// An update is consumed by uploading an encrypted blob that contains
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// information required to sweep a revoked commitment transaction.
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type CreateSession struct {
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// BlobType specifies the blob format that must be used by all updates sent
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// under the session key used to negotiate this session.
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BlobType blob.Type
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// MaxUpdates is the maximum number of updates the watchtower will honor
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// for this session.
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MaxUpdates uint16
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// RewardBase is the fixed amount allocated to the tower when the
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// policy's blob type specifies a reward for the tower. This is taken
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// before adding the proportional reward.
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RewardBase uint32
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// RewardRate is the fraction of the total balance of the revoked
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// commitment that the watchtower is entitled to. This value is
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// expressed in millionths of the total balance.
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RewardRate uint32
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// SweepFeeRate expresses the intended fee rate to be used when
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// constructing the justice transaction. All sweep transactions created
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// for this session must use this value during construction, and the
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// signatures must implicitly commit to the resulting output values.
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SweepFeeRate lnwallet.SatPerKWeight
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}
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// A compile time check to ensure CreateSession implements the wtwire.Message
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// interface.
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var _ Message = (*CreateSession)(nil)
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// Decode deserializes a serialized CreateSession message stored in the passed
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// io.Reader observing the specified protocol version.
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//
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// This is part of the wtwire.Message interface.
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func (m *CreateSession) Decode(r io.Reader, pver uint32) error {
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return ReadElements(r,
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&m.BlobType,
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&m.MaxUpdates,
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&m.RewardBase,
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&m.RewardRate,
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&m.SweepFeeRate,
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)
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}
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// Encode serializes the target CreateSession into the passed io.Writer
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// observing the protocol version specified.
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//
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// This is part of the wtwire.Message interface.
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func (m *CreateSession) Encode(w io.Writer, pver uint32) error {
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return WriteElements(w,
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m.BlobType,
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m.MaxUpdates,
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m.RewardBase,
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m.RewardRate,
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m.SweepFeeRate,
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)
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}
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// MsgType returns the integer uniquely identifying this message type on the
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// wire.
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//
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// This is part of the wtwire.Message interface.
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func (m *CreateSession) MsgType() MessageType {
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return MsgCreateSession
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}
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// MaxPayloadLength returns the maximum allowed payload size for a CreateSession
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// complete message observing the specified protocol version.
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//
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// This is part of the wtwire.Message interface.
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func (m *CreateSession) MaxPayloadLength(uint32) uint32 {
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return 2 + 2 + 4 + 4 + 8 // 20
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}
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