fix(staking): correct default values (#31)

* fix(staking): correct default values

* fix(staking): correct default values

* fix(staking): correct default values

Author: gezerui0124

x/staking/types/params.go

@@ -44,22 +44,22 @@ var DefaultMinDelegation = math.NewInt(1)
 var DefaultPeriods = []Period{
 	{
 		PeriodType:        0,
-		Duration:          time.Duration(0),
+		Duration:          time.Duration(0),    // flexible
 		RewardsMultiplier: math.LegacyOneDec(), // 1
 	},
 	{
 		PeriodType:        1,
-		Duration:          time.Hour * 24 * 30,                // 3 months
+		Duration:          time.Hour * 24 * 90,                // 90 days
 		RewardsMultiplier: math.LegacyNewDecWithPrec(1051, 3), // 1.051
 	},
 	{
 		PeriodType:        2,
-		Duration:          time.Hour * 24 * 365,              // 1 year
+		Duration:          time.Hour * 24 * 360,              // 360 days
 		RewardsMultiplier: math.LegacyNewDecWithPrec(116, 2), // 1.16
 	},
 	{
 		PeriodType:        3,
-		Duration:          time.Hour * 24 * 30 * 18,          // 18 months
+		Duration:          time.Hour * 24 * 540,              // 540 days
 		RewardsMultiplier: math.LegacyNewDecWithPrec(134, 2), // 1.34
 	},
 }