diff --git a/electron/preload/index.ts b/electron/preload/index.ts
index 46c20599..9c7c05ab 100644
--- a/electron/preload/index.ts
+++ b/electron/preload/index.ts
@@ -9,7 +9,9 @@ import type {
   FormattedOfflineVaultTxInfo,
   RecoverFromWrongChainOptions,
   RecoverParams,
+  V1SweepParams,
 } from '@bitgo/abstract-utxo';
+import { v1Sweep } from '@bitgo/abstract-utxo';
 import type {
   ConsolidationRecoveryOptions as TrxConsolidationRecoveryOptions,
   ConsolidationRecoveryBatch as TrxConsolidationRecoveryBatch,
@@ -47,7 +49,7 @@ type Commands = {
       | createSolBroadcastableSweepTransactionParameters
   ): Promise<Error | BroadcastableSweepTransaction>;
   unlock(otp: string);
-  sweepV1(coin: string, parameters);
+  sweepV1(coin: string, parameters: V1SweepParams): ReturnType<typeof v1Sweep>;
   recoverConsolidations(
     coin: string,
     params:
diff --git a/src/containers/V1BtcSweep/index.tsx b/src/containers/V1BtcSweep/index.tsx
index 1a64eab1..87f63635 100644
--- a/src/containers/V1BtcSweep/index.tsx
+++ b/src/containers/V1BtcSweep/index.tsx
@@ -1,9 +1,21 @@
 import {useNavigate, useParams} from 'react-router-dom';
 import {useAlertBanner} from '~/contexts';
-import {safeEnv} from '~/helpers';
+import {assert, safeEnv} from '~/helpers';
 import {V1BtcSweepForm} from "~/containers/V1BtcSweep/V1BtcSweepForm";
 import { BitGoV1Unspent } from "@bitgo/abstract-utxo";
 
+function parseBitGoV1Unspents(input: string): BitGoV1Unspent[] {
+  const unspentsArray: Array<BitGoV1Unspent> = JSON.parse(input);
+  assert(unspentsArray.length > 0, 'Unspents file is empty');
+
+  unspentsArray.forEach((unspent, index) => {
+    assert(unspent.tx_hash !== undefined, `Unspent at index ${index} is missing tx_hash`);
+    assert(unspent.tx_output_n !== undefined, `Unspent at index ${index} is missing tx_output_n`);
+    assert(unspent.value !== undefined, `Unspent at index ${index} is missing value`);
+  });
+
+  return unspentsArray;
+}
 
 export function V1BtcSweep() {
   const {env} = useParams<'env'>();
@@ -15,7 +27,7 @@ export function V1BtcSweep() {
 
   return (
     <V1BtcSweepForm
-      onSubmit={async (values, {setFieldError, setSubmitting}) => {
+      onSubmit={async (values, {setSubmitting}) => {
         if (!values.unspents) {
           setAlert('Unspents file is required');
           return;
@@ -34,7 +46,7 @@ export function V1BtcSweep() {
         fileReader.readAsText(values.unspents, 'UTF-8');
         fileReader.onload = async event => {
           try {
-            const unspents = JSON.parse(event.target?.result as string) as BitGoV1Unspent[];
+            const unspents = parseBitGoV1Unspents(event.target?.result as string);
             setSubmitting(true);
             await window.commands.unlock(values.otp);
             const chainData = await window.queries.getChain(coin);