Add GasLimitOverestimation to mpool config

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>

chain/messagepool/config.go

@@ -14,6 +14,7 @@ var (
 	MemPoolSizeLimitHiDefault = 30000
 	MemPoolSizeLimitLoDefault = 20000
 	PruneCooldownDefault      = time.Minute
+	GasLimitOverestimation    = 1.25
 
 	ConfigKey = datastore.NewKey("/mpool/config")
 )
@@ -34,6 +35,10 @@ func loadConfig(ds dtypes.MetadataDS) (*types.MpoolConfig, error) {
 	}
 	cfg := new(types.MpoolConfig)
 	err = json.Unmarshal(cfgBytes, cfg)
+	if cfg.GasLimitOverestimation == 0 {
+		// TODO: remove in next reset
+		cfg.GasLimitOverestimation = GasLimitOverestimation
+	}
 	return cfg, err
 }
 
@@ -69,5 +74,6 @@ func DefaultConfig() *types.MpoolConfig {
 		SizeLimitLow:           MemPoolSizeLimitLoDefault,
 		ReplaceByFeeRatio:      ReplaceByFeeRatioDefault,
 		PruneCooldown:          PruneCooldownDefault,
+		GasLimitOverestimation: GasLimitOverestimation,
 	}
 }

chain/types/mpool.go

@@ -12,6 +12,7 @@ type MpoolConfig struct {
 	SizeLimitLow           int
 	ReplaceByFeeRatio      float64
 	PruneCooldown          time.Duration
+	GasLimitOverestimation float64
 }
 
 func (mc *MpoolConfig) Clone() *MpoolConfig {

node/impl/full/mpool.go

@@ -106,7 +106,6 @@ func (a *MpoolAPI) MpoolPush(ctx context.Context, smsg *types.SignedMessage) (ci
 }
 
 // GasMargin sets by how much should gas used be increased over test execution
-var GasMargin = 1.5
 
 func (a *MpoolAPI) MpoolPushMessage(ctx context.Context, msg *types.Message) (*types.SignedMessage, error) {
 	if msg.Nonce != 0 {
@@ -117,7 +116,7 @@ func (a *MpoolAPI) MpoolPushMessage(ctx context.Context, msg *types.Message) (*t
 		if err != nil {
 			return nil, xerrors.Errorf("estimating gas used: %w", err)
 		}
-		msg.GasLimit = int64(float64(gasLimit) * GasMargin)
+		msg.GasLimit = int64(float64(gasLimit) * a.Mpool.GetConfig().GasLimitOverestimation)
 	}
 
 	if msg.GasPremium == types.EmptyInt || types.BigCmp(msg.GasPremium, types.NewInt(0)) == 0 {