Alternative count type

x/evm/handler.go

@@ -68,8 +68,8 @@ func handleETHTxMsg(ctx sdk.Context, keeper Keeper, msg types.EthereumTxMsg) sdk
 	txHash := tm.Tx(txBytes).Hash()
 
 	// Prepare db for logs
-	keeper.csdb.Prepare(common.BytesToHash(txHash), common.Hash{}, *keeper.txCount)
-	*keeper.txCount = *keeper.txCount + 1
+	keeper.csdb.Prepare(common.BytesToHash(txHash), common.Hash{}, keeper.txCount.get())
+	keeper.txCount.increment()
 
 	return st.TransitionCSDB(ctx)
 }
@@ -102,8 +102,8 @@ func handleEmintMsg(ctx sdk.Context, keeper Keeper, msg types.EmintMsg) sdk.Resu
 	}
 
 	// Prepare db for logs
-	keeper.csdb.Prepare(common.Hash{}, common.Hash{}, *keeper.txCount) // Cannot provide tx hash
-	*keeper.txCount = *keeper.txCount + 1
+	keeper.csdb.Prepare(common.Hash{}, common.Hash{}, keeper.txCount.get()) // Cannot provide tx hash
+	keeper.txCount.increment()
 
 	return st.TransitionCSDB(ctx)
 }

x/evm/keeper.go

@@ -23,7 +23,21 @@ type Keeper struct {
 	csdb     *types.CommitStateDB
 	cdc      *codec.Codec
 	blockKey sdk.StoreKey
-	txCount  *int
+	txCount  *count
+}
+
+type count int
+
+func (c *count) get() int {
+	return (int)(*c)
+}
+
+func (c *count) increment() {
+	*c = *c + 1
+}
+
+func (c *count) reset() {
+	*c = 0
 }
 
 // NewKeeper generates new evm module keeper
@@ -33,7 +47,7 @@ func NewKeeper(ak auth.AccountKeeper, storageKey, codeKey sdk.StoreKey,
 		csdb:     types.NewCommitStateDB(sdk.Context{}, ak, storageKey, codeKey),
 		cdc:      cdc,
 		blockKey: blockKey,
-		txCount:  new(int),
+		txCount:  new(count),
 	}
 }
 

x/evm/module.go

@@ -107,7 +107,7 @@ func (am AppModule) NewQuerierHandler() sdk.Querier {
 func (am AppModule) BeginBlock(ctx sdk.Context, bl abci.RequestBeginBlock) {
 	// Consider removing this when using evm as module without web3 API
 	am.keeper.SetBlockHashMapping(ctx, bl.Header.LastBlockId.GetHash(), bl.Header.GetHeight()-1)
-	*am.keeper.txCount = 0
+	am.keeper.txCount.reset()
 }
 
 // EndBlock function for module at end of block