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