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loop/swap.go

95 lines
1.8 KiB
Go

package loop
import (
"context"
"time"
"github.com/lightninglabs/lndclient"
"github.com/lightninglabs/loop/loopdb"
"github.com/lightninglabs/loop/swap"
"github.com/lightningnetwork/lnd/lntypes"
)
type swapKit struct {
hash lntypes.Hash
height int32
log *swap.PrefixLog
lastUpdateTime time.Time
cost loopdb.SwapCost
state loopdb.SwapState
contract *loopdb.SwapContract
swapType swap.Type
swapConfig
}
func newSwapKit(hash lntypes.Hash, swapType swap.Type, cfg *swapConfig,
contract *loopdb.SwapContract) *swapKit {
log := &swap.PrefixLog{
Hash: hash,
Logger: log,
}
return &swapKit{
swapConfig: *cfg,
hash: hash,
log: log,
state: loopdb.StateInitiated,
contract: contract,
swapType: swapType,
}
}
// getHtlc composes and returns the on-chain swap script.
func (s *swapKit) getHtlc(outputType swap.HtlcOutputType) (*swap.Htlc, error) {
return swap.NewHtlc(
swap.HtlcV1, s.contract.CltvExpiry, s.contract.SenderKey,
s.contract.ReceiverKey, s.hash, outputType,
s.swapConfig.lnd.ChainParams,
)
}
// swapInfo constructs and returns a filled SwapInfo from
// the swapKit.
func (s *swapKit) swapInfo() *SwapInfo {
return &SwapInfo{
SwapContract: *s.contract,
SwapHash: s.hash,
SwapType: s.swapType,
LastUpdate: s.lastUpdateTime,
SwapStateData: loopdb.SwapStateData{
State: s.state,
Cost: s.cost,
},
}
}
type genericSwap interface {
execute(mainCtx context.Context, cfg *executeConfig,
height int32) error
}
type swapConfig struct {
lnd *lndclient.LndServices
store loopdb.SwapStore
server swapServerClient
}
func newSwapConfig(lnd *lndclient.LndServices, store loopdb.SwapStore,
server swapServerClient) *swapConfig {
return &swapConfig{
lnd: lnd,
store: store,
server: server,
}
}