1 files changed, 6 insertions, 0 deletions
diff --git a/packages/taler-wallet-core/src/operations/common.ts b/packages/taler-wallet-core/src/operations/common.ts
index 96009eb0b..31c1bebb2 100644
--- a/packages/taler-wallet-core/src/operations/common.ts
+++ b/packages/taler-wallet-core/src/operations/common.ts
@@ -115,6 +115,12 @@ export async function spendCoins(
   }>,
   csi: CoinsSpendInfo,
 ): Promise<void> {
+  if (csi.coinPubs.length != csi.contributions.length) {
+    throw Error("assertion failed");
+  }
+  if (csi.coinPubs.length === 0) {
+    return;
+  }
   let refreshCoinPubs: CoinRefreshRequest[] = [];
   for (let i = 0; i < csi.coinPubs.length; i++) {
     const coin = await tx.coins.get(csi.coinPubs[i]);