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package loop
import (
"fmt"
"os"
"github.com/btcsuite/btclog"
"github.com/lightningnetwork/lnd/lntypes"
)
// 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 (
backendLog = btclog.NewBackend(logWriter{})
logger = backendLog.Logger("CLIENT")
servicesLogger = backendLog.Logger("SERVICES")
)
// logWriter implements an io.Writer that outputs to both standard output and
// the write-end pipe of an initialized log rotator.
type logWriter struct{}
func (logWriter) Write(p []byte) (n int, err error) {
os.Stdout.Write(p)
return len(p), nil
}
// SwapLog logs with a short swap hash prefix.
type SwapLog struct {
// Logger is the underlying based logger.
Logger btclog.Logger
// Hash is the hash the identifies the target swap.
Hash lntypes.Hash
}
// Infof formats message according to format specifier and writes to
// log with LevelInfo.
func (s *SwapLog) Infof(format string, params ...interface{}) {
s.Logger.Infof(
fmt.Sprintf("%v %s", ShortHash(&s.Hash), format),
params...,
)
}
// Warnf formats message according to format specifier and writes to
// to log with LevelError.
func (s *SwapLog) Warnf(format string, params ...interface{}) {
s.Logger.Warnf(
fmt.Sprintf("%v %s", ShortHash(&s.Hash), format),
params...,
)
}
// Errorf formats message according to format specifier and writes to
// to log with LevelError.
func (s *SwapLog) Errorf(format string, params ...interface{}) {
s.Logger.Errorf(
fmt.Sprintf("%v %s", ShortHash(&s.Hash), format),
params...,
)
}
// ShortHash returns a shortened version of the hash suitable for use in
// logging.
func ShortHash(hash *lntypes.Hash) string {
return hash.String()[:6]
}