From f7f51a1e43b56b97c96a273a76397186d666d5ed Mon Sep 17 00:00:00 2001
From: Dave Collins <davec@conformal.com>
Date: Thu, 21 Nov 2013 09:35:08 -0600
Subject: [PATCH] Use btclog for logging.

---
 log.go | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/log.go b/log.go
index 0c273bd31..cf4634493 100644
--- a/log.go
+++ b/log.go
@@ -6,14 +6,14 @@ package btcchain
 
 import (
 	"errors"
-	"github.com/conformal/seelog"
+	"github.com/conformal/btclog"
 	"io"
 )
 
 // 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 seelog.LoggerInterface
+var log btclog.Logger
 
 // The default amount of logging is none.
 func init() {
@@ -23,26 +23,31 @@ func init() {
 // DisableLog disables all library log output.  Logging output is disabled
 // by default until either UseLogger or SetLogWriter are called.
 func DisableLog() {
-	log = seelog.Disabled
+	log = 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 seelog.
-func UseLogger(logger seelog.LoggerInterface) {
+// using btclog.
+func UseLogger(logger btclog.Logger) {
 	log = logger
 }
 
 // SetLogWriter uses a specified io.Writer to output package logging info.
 // This allows a caller to direct package logging output without needing a
-// dependency on seelog.  If the caller is also using seelog, UseLogger should
+// dependency on seelog.  If the caller is also using btclog, UseLogger should
 // be used instead.
-func SetLogWriter(w io.Writer) error {
+func SetLogWriter(w io.Writer, level string) error {
 	if w == nil {
 		return errors.New("nil writer")
 	}
 
-	l, err := seelog.LoggerFromWriterWithMinLevel(w, seelog.TraceLvl)
+	lvl, ok := btclog.LogLevelFromString(level)
+	if !ok {
+		return errors.New("invalid log level")
+	}
+
+	l, err := btclog.NewLoggerFromWriter(w, lvl)
 	if err != nil {
 		return err
 	}