diff --git a/oracle/go.mod b/oracle/go.mod
index 6e323089e..8d86dcb74 100644
--- a/oracle/go.mod
+++ b/oracle/go.mod
@@ -6,7 +6,7 @@ replace github.com/tendermint/tendermint => github.com/morph-l2/tendermint v0.3.
 
 require (
 	github.com/go-kit/kit v0.12.0
-	github.com/morph-l2/externalsign v0.3.0
+	github.com/morph-l2/externalsign v0.3.1
 	github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625
 	github.com/prometheus/client_golang v1.17.0
 	github.com/stretchr/testify v1.9.0
diff --git a/oracle/go.sum b/oracle/go.sum
index d0a3216bb..7d0b42448 100644
--- a/oracle/go.sum
+++ b/oracle/go.sum
@@ -175,6 +175,8 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/morph-l2/externalsign v0.3.0 h1:eVGON//ofO5eJSZvJQW+8HUeaGlg4seaS99SzS8GQc4=
 github.com/morph-l2/externalsign v0.3.0/go.mod h1:b6NJ4GUiiG/gcSJsp3p8ExsIs4ZdphlrVALASnVoGJE=
+github.com/morph-l2/externalsign v0.3.1 h1:UYFDZFB0L85A4rDvuwLNBiGEi0kSmg9AZ2v8Q5O4dQo=
+github.com/morph-l2/externalsign v0.3.1/go.mod h1:b6NJ4GUiiG/gcSJsp3p8ExsIs4ZdphlrVALASnVoGJE=
 github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625 h1:4+cbRSS4lacSIC81RXxvA04UHhGVC4SHVn+bKeqhPSM=
 github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625/go.mod h1:sMJCfHOBzVRDkM2yF/Hy+oUk2rgC0CQZHTLs0cyzhhk=
 github.com/morph-l2/tendermint v0.3.1 h1:yqyM3/p9sCNmFSsIFeIxS5RBgXHWqbtyNHx16I9cIZ0=
diff --git a/tx-submitter/go.mod b/tx-submitter/go.mod
index adbc168d8..3ad0de4ce 100644
--- a/tx-submitter/go.mod
+++ b/tx-submitter/go.mod
@@ -6,7 +6,7 @@ replace github.com/tendermint/tendermint => github.com/morph-l2/tendermint v0.3.
 
 require (
 	github.com/holiman/uint256 v1.2.4
-	github.com/morph-l2/externalsign v0.3.0
+	github.com/morph-l2/externalsign v0.3.1
 	github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625
 	github.com/prometheus/client_golang v1.17.0
 	github.com/stretchr/testify v1.9.0
diff --git a/tx-submitter/go.sum b/tx-submitter/go.sum
index 6914a4805..b44394540 100644
--- a/tx-submitter/go.sum
+++ b/tx-submitter/go.sum
@@ -164,6 +164,8 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/morph-l2/externalsign v0.3.0 h1:eVGON//ofO5eJSZvJQW+8HUeaGlg4seaS99SzS8GQc4=
 github.com/morph-l2/externalsign v0.3.0/go.mod h1:b6NJ4GUiiG/gcSJsp3p8ExsIs4ZdphlrVALASnVoGJE=
+github.com/morph-l2/externalsign v0.3.1 h1:UYFDZFB0L85A4rDvuwLNBiGEi0kSmg9AZ2v8Q5O4dQo=
+github.com/morph-l2/externalsign v0.3.1/go.mod h1:b6NJ4GUiiG/gcSJsp3p8ExsIs4ZdphlrVALASnVoGJE=
 github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625 h1:4+cbRSS4lacSIC81RXxvA04UHhGVC4SHVn+bKeqhPSM=
 github.com/morph-l2/go-ethereum v1.10.14-0.20241021080617-0ff2a10a9625/go.mod h1:sMJCfHOBzVRDkM2yF/Hy+oUk2rgC0CQZHTLs0cyzhhk=
 github.com/morph-l2/tendermint v0.3.1 h1:yqyM3/p9sCNmFSsIFeIxS5RBgXHWqbtyNHx16I9cIZ0=
diff --git a/tx-submitter/services/rollup.go b/tx-submitter/services/rollup.go
index 02187bad0..f18e11b61 100644
--- a/tx-submitter/services/rollup.go
+++ b/tx-submitter/services/rollup.go
@@ -104,6 +104,7 @@ func NewRollup(
 		cfg:             cfg,
 		signer:          types.LatestSignerForChainID(chainId),
 		externalRsaPriv: rsaPriv,
+		batchCache:      make(map[uint64]*eth.RPCRollupBatch),
 	}
 }