From 709fa175409d245908fb056d2d3e898d72607b08 Mon Sep 17 00:00:00 2001
From: Wilmer Paulino <wilmer.paulino@gmail.com>
Date: Mon, 5 Nov 2018 17:06:45 -0800
Subject: [PATCH] waddrmgr+wallet: add waddrmgr log to the wallet

---
 waddrmgr/log.go | 43 +++++++++++++++++++++++++++++++++++++++++++
 wallet/log.go   |  2 ++
 2 files changed, 45 insertions(+)
 create mode 100644 waddrmgr/log.go

diff --git a/waddrmgr/log.go b/waddrmgr/log.go
new file mode 100644
index 0000000..44fa6e0
--- /dev/null
+++ b/waddrmgr/log.go
@@ -0,0 +1,43 @@
+package waddrmgr
+
+import "github.com/btcsuite/btclog"
+
+// 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 btclog.Logger
+
+// The default amount of logging is none.
+func init() {
+	DisableLog()
+}
+
+// DisableLog disables all library log output.  Logging output is disabled
+// by default until either UseLogger or SetLogWriter are called.
+func DisableLog() {
+	UseLogger(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 btclog.
+func UseLogger(logger btclog.Logger) {
+	log = logger
+}
+
+// LogClosure is a closure that can be printed with %v to be used to
+// generate expensive-to-create data for a detailed log level and avoid doing
+// the work if the data isn't printed.
+type logClosure func() string
+
+// String invokes the log closure and returns the results string.
+func (c logClosure) String() string {
+	return c()
+}
+
+// newLogClosure returns a new closure over the passed function which allows
+// it to be used as a parameter in a logging function that is only invoked when
+// the logging level is such that the message will actually be logged.
+func newLogClosure(c func() string) logClosure {
+	return logClosure(c)
+}
diff --git a/wallet/log.go b/wallet/log.go
index b1a8f97..b1a1b67 100644
--- a/wallet/log.go
+++ b/wallet/log.go
@@ -6,6 +6,7 @@ package wallet
 
 import (
 	"github.com/btcsuite/btclog"
+	"github.com/btcsuite/btcwallet/waddrmgr"
 	"github.com/btcsuite/btcwallet/walletdb/migration"
 )
 
@@ -32,6 +33,7 @@ func UseLogger(logger btclog.Logger) {
 	log = logger
 
 	migration.UseLogger(logger)
+	waddrmgr.UseLogger(logger)
 }
 
 // LogClosure is a closure that can be printed with %v to be used to