// Loader implements the creating of new and opening of existing wallets, while
// providing a callback system for other subsystems to handle the loading of a
// wallet.  This is primarily intended for use by the RPC servers, to enable
// methods and services which require the wallet when the wallet is loaded by
// another subsystem.
//
// Loader is safe for concurrent access.
type Loader struct {
	callbacks      []func(*Wallet)
	chainParams    *chaincfg.Params
	dbDirPath      string
	recoveryWindow uint32
	wallet         *Wallet
	db             walletdb.DB
	mu             sync.Mutex
}