package sweep import ( "github.com/btcsuite/btclog" "github.com/lightningnetwork/lnd/build" ) // log is a logger that is initialized with no output filters. This // means the package will not perform any logging by default until the caller // requests it. var log btclog.Logger // The default amount of logging is none. func init() { UseLogger(build.NewSubLogger("SWPR", nil)) } // DisableLog disables all library log output. Logging output is disabled // by default until UseLogger is called. func DisableLog() { UseLogger(btclog.Disabled) } // UseLogger uses a specified Logger to output package logging info. // This should be used in preference to SetLogWriter if the caller is also // using btclog. func UseLogger(logger btclog.Logger) { log = logger } // logClosure is used to provide a closure over expensive logging operations so // don't have to be performed when the logging level doesn't warrant it. type logClosure func() string // String invokes the underlying function and returns the result. func (c logClosure) String() string { return c() } // newLogClosure returns a new closure over a function that returns a string // which itself provides a Stringer interface so that it can be used with the // logging system. func newLogClosure(c func() string) logClosure { return logClosure(c) }