log

type Config struct {
	Color   bool   `yaml:"color"`
	TimeFmt string `yaml:"timeFmt"` // one of timeFMT values
	Level   string `yaml:"level"`
	// contains filtered or unexported fields
}

type Logger interface {
	// New returns a new Logger that has this logger's context plus the given context
	New(ctx ...interface{}) log15.Logger

	// Log a message at the given level with context key/value pairs
	Trace(msg string, ctx ...interface{})
	Debug(msg string, ctx ...interface{})
	Info(msg string, ctx ...interface{})
	Warn(msg string, ctx ...interface{})
	Error(msg string, ctx ...interface{})
	Crit(msg string, ctx ...interface{})

	// Fatal is a Crit log followed by panic
	Fatal(msg string, ctx ...interface{})
}