lnd/lnwallet/chancloser/log.go
nsa 2d68a64a5b chancloser: new package for cooperative channel closure
Introduces a new chancloser package which exposes a ChanCloser
struct that handles the cooperative channel closure negotiation
and is meant to replace chancloser.go in the lnd package. Updates
all references to chancloser.go to instead use chancloser package.
2020-06-16 20:34:44 -04:00

42 lines
1.1 KiB
Go

package chancloser
import (
"github.com/btcsuite/btclog"
"github.com/lightningnetwork/lnd/build"
)
// chancloserLog is a logger that is initialized with the btclog.Disabled
// logger.
var chancloserLog btclog.Logger
// The default amount of logging is none.
func init() {
UseLogger(build.NewSubLogger("CHCL", nil))
}
// DisableLog disables all logging output.
func DisableLog() {
UseLogger(btclog.Disabled)
}
// UseLogger uses a specified Logger to output package logging info.
func UseLogger(logger btclog.Logger) {
chancloserLog = logger
}
// logClosure is used to provide a closure over expensive logging operations
// so they aren't 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)
}