1 files changed, 13 insertions, 7 deletions
diff --git a/packages/taler-wallet-core/src/util/coinSelection.ts b/packages/taler-wallet-core/src/util/coinSelection.ts
index 6fd0f1b86..0885215dd 100644
--- a/packages/taler-wallet-core/src/util/coinSelection.ts
+++ b/packages/taler-wallet-core/src/util/coinSelection.ts
@@ -894,6 +894,12 @@ interface PeerCoinSelectionTally {
   lastDepositFee: AmountJson;
 }
 
+/**
+ * exporting for testing
+ */
+export function testing_greedySelectPeer(...args: Parameters<typeof greedySelectPeer>): ReturnType<typeof greedySelectPeer> {
+  return greedySelectPeer(...args)
+}
 function greedySelectPeer(
   candidates: AvailableDenom[],
   instructedAmount: AmountLike,
@@ -912,19 +918,19 @@ function greedySelectPeer(
         instructedAmount,
         tally.amountAcc,
       ).amount;
-      const coinSpend = Amounts.max(
-        Amounts.min(amountPayRemaining, denom.value),
-        denom.feeDeposit,
-      );
+      const coinContrib = Amounts.sub(denom.value, denom.feeDeposit).amount
+
+      const coinSpend = Amounts.min(amountPayRemaining, coinContrib)
+      
       tally.amountAcc = Amounts.add(tally.amountAcc, coinSpend).amount;
-      // Since this is a peer payment, there is no merchant to
-      // potentially cover the deposit fees.
-      tally.amountAcc = Amounts.sub(tally.amountAcc, denom.feeDeposit).amount;
+
       tally.depositFeesAcc = Amounts.add(
         tally.depositFeesAcc,
         denom.feeDeposit,
       ).amount;
+
       tally.lastDepositFee = Amounts.parseOrThrow(denom.feeDeposit);
+      
       contributions.push(coinSpend);
     }
     if (contributions.length > 0) {