From e3a09418255b6f00d5f4f59756e2fe79b81ff0f6 Mon Sep 17 00:00:00 2001
From: j75689 <j75689@gmail.com>
Date: Fri, 22 Dec 2023 14:55:51 +0800
Subject: [PATCH] feat: set syncFee to 0.05bnb after FirstSunsetFork

---
 x/paramHub/keeper/keeper.go | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/x/paramHub/keeper/keeper.go b/x/paramHub/keeper/keeper.go
index b01d2db10..f0b15571d 100644
--- a/x/paramHub/keeper/keeper.go
+++ b/x/paramHub/keeper/keeper.go
@@ -2,8 +2,12 @@ package keeper
 
 import (
 	"fmt"
+	"math/big"
 	"time"
 
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/tendermint/tendermint/libs/log"
+
 	"github.com/cosmos/cosmos-sdk/bsc/rlp"
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -13,7 +17,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/params"
 	"github.com/cosmos/cosmos-sdk/x/sidechain"
 	sTypes "github.com/cosmos/cosmos-sdk/x/sidechain/types"
-	"github.com/tendermint/tendermint/libs/log"
 )
 
 var (
@@ -130,6 +133,30 @@ func (keeper *Keeper) EndBreatheBlock(ctx sdk.Context) {
 	return
 }
 
+func (keeper *Keeper) SetSyncFeeAfterFirstSunsetFork(ctx sdk.Context) error {
+	log := keeper.Logger(ctx)
+	if sdk.IsUpgrade(sdk.FirstSunsetFork) && keeper.ScKeeper != nil {
+		log.Info("Set sync fee to 0.05 BNB after first sunset hardfork")
+		sideChainIds, storePrefixes := keeper.ScKeeper.GetAllSideChainPrefixes(ctx)
+		cscChanges := make([]types.CSCParamChange, 0, 1)
+		fee := new(big.Int).Mul(big.NewInt(5), big.NewInt(1e10))
+		fee = new(big.Int).Div(fee, big.NewInt(100))
+		cscChanges = append(cscChanges, types.CSCParamChange{
+			Key:         "syncFee",
+			Value:       "0.05",
+			Target:      "0x0000000000000000000000000000000000001008",
+			ValueBytes:  fee.FillBytes(make([]byte, 32)),
+			TargetBytes: common.HexToAddress("0x0000000000000000000000000000000000001008").Bytes(),
+		})
+		for idx := range storePrefixes {
+			sideChainCtx := ctx.WithSideChainKeyPrefix(storePrefixes[idx])
+			keeper.notifyOnUpdate(sideChainCtx, types.CSCParamChanges{Changes: cscChanges, ChainID: sideChainIds[idx]})
+		}
+	}
+
+	return nil
+}
+
 func (keeper *Keeper) EndBlock(ctx sdk.Context) {
 	log := keeper.Logger(ctx)
 	log.Info("Sync params proposals.")