From c6e59485349732d1d34b53e128555f89744b5a6b Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Mon, 31 Aug 2015 13:00:20 -0700
Subject: [PATCH] time writes milliseconds using ISO8601 format

---
 wire/reflect.go |  8 ++++----
 wire/time.go    | 14 ++++++++++++--
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/wire/reflect.go b/wire/reflect.go
index f8f916f3..d964d585 100644
--- a/wire/reflect.go
+++ b/wire/reflect.go
@@ -93,7 +93,7 @@ var (
 )
 
 const (
-	rfc2822 = "Mon Jan 02 15:04:05 -0700 2006"
+	iso8601 = "2006-01-02T15:04:05.000Z" // forced microseconds
 )
 
 // NOTE: do not access typeInfos directly, but call GetTypeInfo()
@@ -731,7 +731,7 @@ func readReflectJSON(rv reflect.Value, rt reflect.Type, o interface{}, err *erro
 				return
 			}
 			log.Info(Fmt("Read time: %v", str))
-			t, err_ := time.Parse(rfc2822, str)
+			t, err_ := time.Parse(iso8601, str)
 			if err_ != nil {
 				*err = err_
 				return
@@ -908,8 +908,8 @@ func writeReflectJSON(rv reflect.Value, rt reflect.Type, w io.Writer, n *int64,
 	case reflect.Struct:
 		if rt == timeType {
 			// Special case: time.Time
-			t := rv.Interface().(time.Time)
-			str := t.Format(rfc2822)
+			t := rv.Interface().(time.Time).UTC()
+			str := t.Format(iso8601)
 			jsonBytes, err_ := json.Marshal(str)
 			if err_ != nil {
 				*err = err_
diff --git a/wire/time.go b/wire/time.go
index c4a57334..fde8b8ae 100644
--- a/wire/time.go
+++ b/wire/time.go
@@ -3,15 +3,25 @@ package wire
 import (
 	"io"
 	"time"
+
+	. "github.com/tendermint/tendermint/common"
 )
 
-// Time
+/*
+Writes nanoseconds since epoch but with millisecond precision.
+This is to ease compatibility with Javascript etc.
+*/
 
 func WriteTime(t time.Time, w io.Writer, n *int64, err *error) {
-	WriteInt64(t.UnixNano(), w, n, err)
+	nanosecs := t.UnixNano()
+	millisecs := nanosecs / 1000000
+	WriteInt64(millisecs*1000000, w, n, err)
 }
 
 func ReadTime(r io.Reader, n *int64, err *error) time.Time {
 	t := ReadInt64(r, n, err)
+	if t%1000000 != 0 {
+		PanicSanity("Time cannot have sub-millisecond precision")
+	}
 	return time.Unix(0, t)
 }