1 files changed, 5 insertions, 0 deletions
diff --git a/packages/taler-wallet-core/src/operations/pay-peer.ts b/packages/taler-wallet-core/src/operations/pay-peer.ts
index 92ec549dd..ebf521079 100644
--- a/packages/taler-wallet-core/src/operations/pay-peer.ts
+++ b/packages/taler-wallet-core/src/operations/pay-peer.ts
@@ -342,6 +342,8 @@ export async function selectPeerCoins(
 
       const perExchange: PayPeerInsufficientBalanceDetails["perExchange"] = {};
 
+      let maxFeeGapEstimate = Amounts.zeroOfCurrency(currency);
+
       for (const exch of exchanges) {
         if (exch.detailsPointer?.currency !== currency) {
           continue;
@@ -361,12 +363,15 @@ export async function selectPeerCoins(
           balanceMaterial: Amounts.stringify(infoExchange.balanceMaterial),
           feeGapEstimate: Amounts.stringify(gap),
         };
+
+        maxFeeGapEstimate = Amounts.max(maxFeeGapEstimate, gap);
       }
 
       const errDetails: PayPeerInsufficientBalanceDetails = {
         amountRequested: Amounts.stringify(instructedAmount),
         balanceAvailable: Amounts.stringify(infoGeneral.balanceAvailable),
         balanceMaterial: Amounts.stringify(infoGeneral.balanceMaterial),
+        feeGapEstimate: Amounts.stringify(maxFeeGapEstimate),
         perExchange,
       };