diff --git a/server/flags.go b/server/flags.go
index 13a63ecb..e7d00e01 100644
--- a/server/flags.go
+++ b/server/flags.go
@@ -21,9 +21,7 @@ func AddFlags(cmd *cobra.Command) {
 	cmd.Flags().Bool(config.FlagLight, def.Node.Light, "run light client")
 	cmd.Flags().Duration(config.FlagBlockTime, def.Node.BlockTime.Duration, "block time (for aggregator mode)")
 	cmd.Flags().String(config.FlagTrustedHash, def.Node.TrustedHash, "initial trusted hash to start the header exchange service")
-	cmd.Flags().Bool(config.FlagLazyAggregator, def.Node.LazyAggregator, "produce blocks only when transactions are available or after lazy block time")
 	cmd.Flags().Uint64(config.FlagMaxPendingBlocks, def.Node.MaxPendingBlocks, "maximum blocks pending DA confirmation before pausing block production (0 for no limit)")
-	cmd.Flags().Duration(config.FlagLazyBlockTime, def.Node.LazyBlockTime.Duration, "maximum interval between blocks in lazy aggregation mode")
 
 	// Data Availability configuration flags
 	cmd.Flags().String(config.FlagDAAddress, def.DA.Address, "DA address (host:port)")
diff --git a/server/start.go b/server/start.go
index 6f69bfb4..dc81f9cc 100644
--- a/server/start.go
+++ b/server/start.go
@@ -33,8 +33,7 @@ import (
 	"google.golang.org/grpc/credentials/insecure"
 
 	"github.com/rollkit/rollkit/core/sequencer"
-	rollkitda "github.com/rollkit/rollkit/da"
-	"github.com/rollkit/rollkit/da/proxy/jsonrpc"
+	"github.com/rollkit/rollkit/da/jsonrpc"
 	"github.com/rollkit/rollkit/node"
 	"github.com/rollkit/rollkit/pkg/config"
 	"github.com/rollkit/rollkit/pkg/genesis"
@@ -46,7 +45,7 @@ import (
 	"github.com/rollkit/go-execution-abci/pkg/adapter"
 	"github.com/rollkit/go-execution-abci/pkg/rpc"
 	rpcjson "github.com/rollkit/go-execution-abci/pkg/rpc/json"
-	provider "github.com/rollkit/go-execution-abci/pkg/rpc/provider"
+	"github.com/rollkit/go-execution-abci/pkg/rpc/provider"
 	execsigner "github.com/rollkit/go-execution-abci/pkg/signer"
 )
 
@@ -397,20 +396,17 @@ func startNode(
 	)
 
 	// create the DA client
-	daClient, err := jsonrpc.NewClient(ctx, logger, rollkitcfg.DA.Address, rollkitcfg.DA.AuthToken)
+	daClient, err := jsonrpc.NewClient(ctx, logger, rollkitcfg.DA.Address, rollkitcfg.DA.AuthToken, rollkitcfg.DA.Namespace)
 	if err != nil {
 		return nil, nil, nil, cleanupFn, fmt.Errorf("failed to create DA client: %w", err)
 	}
 
-	// TODO(@facu): gas price and gas multiplier should be set by the node operator
-	rollkitda := rollkitda.NewDAClient(&daClient.DA, 1, 1, []byte(cmtGenDoc.ChainID), []byte{}, logger)
-
 	rolllkitNode, err = node.NewNode(
 		ctxWithCancel,
 		rollkitcfg,
 		executor,
 		sequencer.NewDummySequencer(),
-		rollkitda,
+		&daClient.DA,
 		signer,
 		*nodeKey,
 		p2pClient,