From 346b8469fe0e74a379fdd1b477722fb4f4179972 Mon Sep 17 00:00:00 2001
From: Thomas Bruyelle <thomas.bruyelle@tendermint.com>
Date: Fri, 24 Apr 2026 12:10:19 +0200
Subject: [PATCH 1/2] chore(v4/upgrade): apply Option C dynamicfee params

Closes #285
---
 app/upgrades/v4/upgrades.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/app/upgrades/v4/upgrades.go b/app/upgrades/v4/upgrades.go
index 7aa2f2f5..b945f0f7 100644
--- a/app/upgrades/v4/upgrades.go
+++ b/app/upgrades/v4/upgrades.go
@@ -14,6 +14,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/runtime"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
+	dynamicfeekeeper "github.com/cosmos/cosmos-sdk/x/dynamicfee/keeper"
 	govkeeper "github.com/cosmos/cosmos-sdk/x/gov/keeper"
 	sdkgov "github.com/cosmos/cosmos-sdk/x/gov/types"
 	sdkgovv1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
@@ -47,6 +48,10 @@ func CreateUpgradeHandler(
 			return vm, err
 		}
 
+		if err := initDynamicfeeParams(ctx, keepers.DynamicfeeKeeper); err != nil {
+			return vm, err
+		}
+
 		return vm, nil
 	}
 }
@@ -613,3 +618,21 @@ func migrateValidatorsCommission(ctx context.Context, stakingKeeper *stakingkeep
 	}
 	return nil
 }
+
+func initDynamicfeeParams(ctx context.Context, dynamicfeeKeeper *dynamicfeekeeper.Keeper) error {
+	params, err := dynamicfeeKeeper.GetParams(ctx)
+	if err != nil {
+		return err
+	}
+
+	// Option C from issue #285: https://github.com/atomone-hub/atomone/issues/285
+	// MinLearningRate: 0.01 -> 0.125 and Window: 8 -> 4 to guarantee responsiveness
+	// under persistent moderate congestion (66M gas with target 50M).
+	params.MinLearningRate = math.LegacyMustNewDecFromStr("0.125")
+	params.Window = 4
+
+	if err := dynamicfeeKeeper.SetParams(ctx, params); err != nil {
+		return fmt.Errorf("failed to set dynamicfee params: %w", err)
+	}
+	return nil
+}

From 27131ebb99eb837363756c598c9ce28a40671494 Mon Sep 17 00:00:00 2001
From: Giuseppe Natale <12249307+giunatale@users.noreply.github.com>
Date: Sat, 25 Apr 2026 14:21:30 +0200
Subject: [PATCH 2/2] lint

---
 app/upgrades/v4/upgrades.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/upgrades/v4/upgrades.go b/app/upgrades/v4/upgrades.go
index 5f796363..3c37c282 100644
--- a/app/upgrades/v4/upgrades.go
+++ b/app/upgrades/v4/upgrades.go
@@ -672,6 +672,6 @@ func initDynamicfeeParams(ctx context.Context, dynamicfeeKeeper *dynamicfeekeepe
 	if err := dynamicfeeKeeper.SetParams(ctx, params); err != nil {
 		return fmt.Errorf("failed to set dynamicfee params: %w", err)
 	}
-  
-  return nil
+
+	return nil
 }