package bitcoindnotify import ( "errors" "fmt" "github.com/btcsuite/btcd/chaincfg" "github.com/btcsuite/btcwallet/chain" "github.com/lightningnetwork/lnd/blockcache" "github.com/lightningnetwork/lnd/chainntnfs" ) // createNewNotifier creates a new instance of the ChainNotifier interface // implemented by BitcoindNotifier. func createNewNotifier(args ...interface{}) (chainntnfs.ChainNotifier, error) { if len(args) != 5 { return nil, fmt.Errorf("incorrect number of arguments to "+ ".New(...), expected 5, instead passed %v", len(args)) } chainConn, ok := args[0].(*chain.BitcoindConn) if !ok { return nil, errors.New("first argument to bitcoindnotify.New " + "is incorrect, expected a *chain.BitcoindConn") } chainParams, ok := args[1].(*chaincfg.Params) if !ok { return nil, errors.New("second argument to bitcoindnotify.New " + "is incorrect, expected a *chaincfg.Params") } spendHintCache, ok := args[2].(chainntnfs.SpendHintCache) if !ok { return nil, errors.New("third argument to bitcoindnotify.New " + "is incorrect, expected a chainntnfs.SpendHintCache") } confirmHintCache, ok := args[3].(chainntnfs.ConfirmHintCache) if !ok { return nil, errors.New("fourth argument to bitcoindnotify.New " + "is incorrect, expected a chainntnfs.ConfirmHintCache") } blockCache, ok := args[4].(*blockcache.BlockCache) if !ok { return nil, errors.New("fifth argument to bitcoindnotify.New " + "is incorrect, expected a *blockcache.BlockCache") } return New(chainConn, chainParams, spendHintCache, confirmHintCache, blockCache), nil } // init registers a driver for the BtcdNotifier concrete implementation of the // chainntnfs.ChainNotifier interface. func init() { // Register the driver. notifier := &chainntnfs.NotifierDriver{ NotifierType: notifierType, New: createNewNotifier, } if err := chainntnfs.RegisterNotifier(notifier); err != nil { panic(fmt.Sprintf("failed to register notifier driver '%s': %v", notifierType, err)) } }