diff --git a/src/families/cosmos/api/Cosmos.ts b/src/families/cosmos/api/Cosmos.ts
index e179aa04ee..19f0d878b9 100644
--- a/src/families/cosmos/api/Cosmos.ts
+++ b/src/families/cosmos/api/Cosmos.ts
@@ -46,7 +46,9 @@ export const getAccountInfo = async (address: string): Promise<any> => {
   }
 };
 
-export const getAccount = async (address: string): Promise<any> => {
+export const getAccount = async (
+  address: string
+): Promise<{ address: string; accountNumber: number; sequence: number }> => {
   const response = {
     address: address,
     accountNumber: 0,
diff --git a/src/families/cosmos/js-createTransaction.ts b/src/families/cosmos/js-createTransaction.ts
index 0da7675ffb..1027809f3a 100644
--- a/src/families/cosmos/js-createTransaction.ts
+++ b/src/families/cosmos/js-createTransaction.ts
@@ -1,5 +1,5 @@
 import { BigNumber } from "bignumber.js";
-import type { Transaction } from "./types";
+import type { CosmosDelegationInfo, Transaction } from "./types";
 
 /**
  * Create an empty transaction
@@ -17,7 +17,7 @@ const createTransaction = (): Transaction => ({
   networkInfo: null,
   memo: null,
   cosmosSourceValidator: null,
-  validators: [],
+  validators: [] as CosmosDelegationInfo[],
 });
 
 export default createTransaction;
diff --git a/src/families/cosmos/js-signOperation.ts b/src/families/cosmos/js-signOperation.ts
index 8ede2b5a0b..d8fb56515e 100644
--- a/src/families/cosmos/js-signOperation.ts
+++ b/src/families/cosmos/js-signOperation.ts
@@ -154,6 +154,7 @@ const signOperation = ({
           recipients,
           accountId,
           date: new Date(),
+          transactionSequenceNumber: sequence,
         };
 
         o.next({
diff --git a/src/families/cosmos/js-synchronisation.ts b/src/families/cosmos/js-synchronisation.ts
index 5e19f25b74..d5eb008b08 100644
--- a/src/families/cosmos/js-synchronisation.ts
+++ b/src/families/cosmos/js-synchronisation.ts
@@ -33,6 +33,9 @@ const txToOps = (info: any, id: string, txs: any): Operation[] => {
       extra: {
         validators: [] as CosmosDelegationInfo[],
       },
+      transactionSequenceNumber: parseInt(
+        tx.tx.auth_info.signer_infos[0].sequence
+      ),
     };
 
     tx.logs[0].events.forEach((message) => {