get account sequence in GetTransactionCount (#303)

* get account sequence if querying latest in GetTransactionCount

* use ctx WithHeight in GetTransactionCount; remove nonce query from querier

x/evm/keeper/querier.go

@@ -32,8 +32,6 @@ func NewQuerier(keeper Keeper) sdk.Querier {
 			return queryStorage(ctx, path, keeper)
 		case types.QueryCode:
 			return queryCode(ctx, path, keeper)
-		case types.QueryNonce:
-			return queryNonce(ctx, path, keeper)
 		case types.QueryHashToHeight:
 			return queryHashToHeight(ctx, path, keeper)
 		case types.QueryTransactionLogs:
@@ -113,18 +111,6 @@ func queryCode(ctx sdk.Context, path []string, keeper Keeper) ([]byte, error) {
 	return bz, nil
 }
 
-func queryNonce(ctx sdk.Context, path []string, keeper Keeper) ([]byte, error) {
-	addr := ethcmn.HexToAddress(path[1])
-	nonce := keeper.GetNonce(ctx, addr)
-	nRes := types.QueryResNonce{Nonce: nonce}
-	bz, err := codec.MarshalJSONIndent(keeper.cdc, nRes)
-	if err != nil {
-		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
-	}
-
-	return bz, nil
-}
-
 func queryHashToHeight(ctx sdk.Context, path []string, keeper Keeper) ([]byte, error) {
 	blockHash := ethcmn.FromHex(path[1])
 	blockNumber, err := keeper.GetBlockHashMapping(ctx, blockHash)

x/evm/keeper/querier_test.go

@@ -24,7 +24,6 @@ func (suite *KeeperTestSuite) TestQuerier() {
 		{"block number", []string{types.QueryBlockNumber, "0x0"}, func() {}, true},
 		{"storage", []string{types.QueryStorage, "0x0", "0x0"}, func() {}, true},
 		{"code", []string{types.QueryCode, "0x0"}, func() {}, true},
-		{"nonce", []string{types.QueryNonce, "0x0"}, func() {}, true},
 		// {"hash to height", []string{types.QueryHashToHeight, "0x0"}, func() {}, true},
 		{"tx logs", []string{types.QueryTransactionLogs, "0x0"}, func() {}, true},
 		// {"logs bloom", []string{types.QueryLogsBloom, "0x0"}, func() {}, true},