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loop/loopdb/loopin.go

169 lines
3.7 KiB
Go

package loopdb
import (
"bytes"
"encoding/binary"
"fmt"
"time"
)
// LoopInContract contains the data that is serialized to persistent storage for
// pending loop in swaps.
type LoopInContract struct {
SwapContract
// SweepConfTarget specifies the targeted confirmation target for the
// client sweep tx.
HtlcConfTarget int32
// LoopInChannel is the channel to charge. If zero, any channel may
// be used.
LoopInChannel *uint64
}
// LoopIn is a combination of the contract and the updates.
type LoopIn struct {
Loop
Contract *LoopInContract
}
// LastUpdateTime returns the last update time of this swap.
func (s *LoopIn) LastUpdateTime() time.Time {
lastUpdate := s.LastUpdate()
if lastUpdate == nil {
return s.Contract.InitiationTime
}
return lastUpdate.Time
}
// serializeLoopInContract serialize the loop in contract into a byte slice.
func serializeLoopInContract(swap *LoopInContract) (
[]byte, error) {
var b bytes.Buffer
if err := binary.Write(&b, byteOrder, swap.InitiationTime.UnixNano()); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.Preimage); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.AmountRequested); err != nil {
return nil, err
}
n, err := b.Write(swap.SenderKey[:])
if err != nil {
return nil, err
}
if n != keyLength {
return nil, fmt.Errorf("sender key has invalid length")
}
n, err = b.Write(swap.ReceiverKey[:])
if err != nil {
return nil, err
}
if n != keyLength {
return nil, fmt.Errorf("receiver key has invalid length")
}
if err := binary.Write(&b, byteOrder, swap.CltvExpiry); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.MaxMinerFee); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.MaxSwapFee); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.InitiationHeight); err != nil {
return nil, err
}
if err := binary.Write(&b, byteOrder, swap.HtlcConfTarget); err != nil {
return nil, err
}
var chargeChannel uint64
if swap.LoopInChannel != nil {
chargeChannel = *swap.LoopInChannel
}
if err := binary.Write(&b, byteOrder, chargeChannel); err != nil {
return nil, err
}
return b.Bytes(), nil
}
// deserializeLoopInContract deserializes the loop in contract from a byte slice.
func deserializeLoopInContract(value []byte) (*LoopInContract, error) {
r := bytes.NewReader(value)
contract := LoopInContract{}
var err error
var unixNano int64
if err := binary.Read(r, byteOrder, &unixNano); err != nil {
return nil, err
}
contract.InitiationTime = time.Unix(0, unixNano)
if err := binary.Read(r, byteOrder, &contract.Preimage); err != nil {
return nil, err
}
binary.Read(r, byteOrder, &contract.AmountRequested)
n, err := r.Read(contract.SenderKey[:])
if err != nil {
return nil, err
}
if n != keyLength {
return nil, fmt.Errorf("sender key has invalid length")
}
n, err = r.Read(contract.ReceiverKey[:])
if err != nil {
return nil, err
}
if n != keyLength {
return nil, fmt.Errorf("receiver key has invalid length")
}
if err := binary.Read(r, byteOrder, &contract.CltvExpiry); err != nil {
return nil, err
}
if err := binary.Read(r, byteOrder, &contract.MaxMinerFee); err != nil {
return nil, err
}
if err := binary.Read(r, byteOrder, &contract.MaxSwapFee); err != nil {
return nil, err
}
if err := binary.Read(r, byteOrder, &contract.InitiationHeight); err != nil {
return nil, err
}
if err := binary.Read(r, byteOrder, &contract.HtlcConfTarget); err != nil {
return nil, err
}
var loopInChannel uint64
if err := binary.Read(r, byteOrder, &loopInChannel); err != nil {
return nil, err
}
if loopInChannel != 0 {
contract.LoopInChannel = &loopInChannel
}
return &contract, nil
}