UI fixes

2 files changed, 40 insertions, 0 deletions

diff --git a/lib/wallet/wallet.ts b/lib/wallet/wallet.ts
index dde7a8248..3c9f3ffed 100644
--- a/lib/wallet/wallet.ts
+++ b/lib/wallet/wallet.ts
@@ -522,6 +522,28 @@ export class Wallet {
 
 
   /**
+   * Add a contract to the wallet and sign coins,
+   * but do not send them yet.
+   */
+  checkPay(offer: Offer): Promise<any> {
+    console.log("executing checkPay");
+    return Promise.resolve().then(() => {
+      return this.getPossibleExchangeCoins(offer.contract.amount,
+                                           offer.contract.max_fee,
+                                           offer.contract.exchanges)
+    }).then((mcs) => {
+      if (Object.keys(mcs).length == 0) {
+        console.log("not confirming payment, insufficient coins");
+        return {
+          error: "coins-insufficient",
+        };
+      }
+      return {};
+    });
+  }
+
+
+  /**
    * Retrieve all necessary information for looking up the contract
    * with the given hash.
    */
diff --git a/lib/wallet/wxMessaging.ts b/lib/wallet/wxMessaging.ts
index 64b16de8d..164342f4e 100644
--- a/lib/wallet/wxMessaging.ts
+++ b/lib/wallet/wxMessaging.ts
@@ -99,6 +99,24 @@ function makeHandlers(db: IDBDatabase,
 
       return wallet.confirmPay(offer);
     },
+    ["check-pay"]: function(detail, sender) {
+      let offer;
+      try {
+        offer = Offer.checked(detail.offer);
+      } catch (e) {
+        if (e instanceof Checkable.SchemaError) {
+          console.error("schema error:", e.message);
+          return Promise.resolve({
+                                   error: "invalid contract",
+                                   hint: e.message,
+                                   detail: detail
+                                 });
+        } else {
+          throw e;
+        }
+      }
+      return wallet.checkPay(offer);
+    },
     ["execute-payment"]: function(detail, sender) {
       return wallet.executePayment(detail.H_contract);
     },