1 files changed, 45 insertions, 28 deletions
diff --git a/packages/taler-wallet-core/src/operations/pay-merchant.ts b/packages/taler-wallet-core/src/operations/pay-merchant.ts
index ed7f17a18..49b9a6559 100644
--- a/packages/taler-wallet-core/src/operations/pay-merchant.ts
+++ b/packages/taler-wallet-core/src/operations/pay-merchant.ts
@@ -191,34 +191,6 @@ export async function getTotalPaymentCost(
     });
 }
 
-export interface CoinSelectionRequest {
-  amount: AmountJson;
-
-  allowedAuditors: AllowedAuditorInfo[];
-  allowedExchanges: AllowedExchangeInfo[];
-
-  /**
-   * Timestamp of the contract.
-   */
-  timestamp: TalerProtocolTimestamp;
-
-  wireMethod: string;
-
-  wireFeeAmortization: number;
-
-  maxWireFee: AmountJson;
-
-  maxDepositFee: AmountJson;
-
-  /**
-   * Minimum age requirement for the coin selection.
-   *
-   * When present, only select coins with either no age restriction
-   * or coins with an age commitment that matches the minimum age.
-   */
-  minimumAge?: number;
-}
-
 async function failProposalPermanently(
   ws: InternalWalletState,
   proposalId: string,
@@ -903,6 +875,51 @@ async function unblockBackup(
     });
 }
 
+/**
+ * Detailed reason for why the wallet's balance is insufficient.
+ */
+export interface PayMerchantInsufficientBalanceDetails {
+  /**
+   * Amount requested by the merchant.
+   */
+  amountRequested: AmountJson;
+
+  /**
+   * Balance of type "available" (see balance.ts for definition).
+   */
+  balanceAvailable: AmountJson;
+
+  /**
+   * Balance of type "material" (see balance.ts for definition).
+   */
+  balanceMaterial: AmountJson;
+
+  /**
+   * Balance of type "age-acceptable" (see balance.ts for definition).
+   */
+  balanceAgeAcceptable: AmountJson;
+
+  /**
+   * Balance of type "merchant-acceptable" (see balance.ts for definition).
+   */
+  balanceMechantAcceptable: AmountJson;
+
+  /**
+   * Balance of type "merchant-wireable" (see balance.ts for definition).
+   */
+  balanceMechantWireable: AmountJson;
+
+  /**
+   * If the payment would succeed without fees,
+   * this field contains an estimate of the amount that would additionally
+   * be required to cover the fees.
+   * 
+   * It is not possible to give an exact value here, since it depends
+   * on the coin selection for the amount that would be additionally withdrawn.
+   */
+  feeGapEstimate: AmountJson
+}
+
 export interface SelectPayCoinRequestNg {
   exchanges: AllowedExchangeInfo[];
   auditors: AllowedAuditorInfo[];