making first liqudiation closing ratio as param

Author: avkr003

api/elys/perpetual/params.pulsar.go

@@ -135,4 +135,9 @@ message Params {
     (gogoproto.customtype) = "cosmossdk.io/math.LegacyDec",
     (gogoproto.nullable) = false
   ];
+  string first_liquidation_closing_ratio = 27 [
+    (cosmos_proto.scalar) = "cosmos.Dec",
+    (gogoproto.customtype) = "cosmossdk.io/math.LegacyDec",
+    (gogoproto.nullable) = false
+  ];
 }

proto/elys/perpetual/params.proto

@@ -15,7 +15,8 @@ func (k Keeper) ForceClose(ctx sdk.Context, mtp *types.MTP, pool *types.Pool, am
 	closingRatio := math.LegacyOneDec()
 	addCollateral := false
 	if isLiquidation && !mtp.PartialLiquidationDone {
-		closingRatio = math.LegacyOneDec().QuoInt64(2)
+		params := k.GetParams(ctx)
+		closingRatio = params.FirstLiquidationClosingRatio
 		addCollateral = true
 	}
 	repayAmt, returnAmount, perpetualFeesCoins, closingPrice, collateralToAdd, err := k.EstimateAndRepay(ctx, mtp, pool, ammPool, closingRatio, isLiquidation)

x/perpetual/keeper/force_close.go

@@ -9,6 +9,7 @@ func (m Migrator) V22Migration(ctx sdk.Context) error {
 	params := m.keeper.GetParams(ctx)
 	params.MinimumFundingRate = math.LegacyMustNewDecFromStr("0.1")
 	params.SecondLiquidationTriggerRatio = math.LegacyMustNewDecFromStr("0.67")
+	params.FirstLiquidationClosingRatio = math.LegacyMustNewDecFromStr("0.5")
 	err := m.keeper.SetParams(ctx, &params)
 	if err != nil {
 		return err

x/perpetual/migrations/v22_migration.go

@@ -8,6 +8,7 @@ import (
 func (m Migrator) V23Migration(ctx sdk.Context) error {
 	params := m.keeper.GetParams(ctx)
 	params.SecondLiquidationTriggerRatio = math.LegacyMustNewDecFromStr("0.67")
+	params.FirstLiquidationClosingRatio = math.LegacyMustNewDecFromStr("0.5")
 	err := m.keeper.SetParams(ctx, &params)
 	if err != nil {
 		return err

x/perpetual/migrations/v23_migration.go

@@ -37,6 +37,7 @@ func NewParams() Params {
 		TakerFee:                            math.LegacyMustNewDecFromStr("0.00075"),
 		MinimumFundingRate:                  math.LegacyMustNewDecFromStr("0.1"),
 		SecondLiquidationTriggerRatio:       math.LegacyMustNewDecFromStr("0.67"),
+		FirstLiquidationClosingRatio:        math.LegacyMustNewDecFromStr("0.5"),
 	}
 }