1 files changed, 47 insertions, 0 deletions
diff --git a/packages/taler-util/src/wallet-types.ts b/packages/taler-util/src/wallet-types.ts
index 402a9ed95..d7685fa6e 100644
--- a/packages/taler-util/src/wallet-types.ts
+++ b/packages/taler-util/src/wallet-types.ts
@@ -2081,3 +2081,50 @@ export interface InitiatePeerPullPaymentResponse {
 
   transactionId: string;
 }
+
+
+/**
+ * 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-depositable" (see balance.ts for definition).
+   */
+  balanceMechantDepositable: AmountJson;
+
+  /**
+   * If the payment would succeed without fees
+   * (i.e. balanceMechantWireable >= amountRequested),
+   * 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+   * on the coin selection for the amount that would be additionally withdrawn.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;
+}
+\ No newline at end of file