consider supported wire types when selecting coins

Also add an integration test to check for the correct wallet behavior.

2 files changed, 20 insertions, 1 deletions

diff --git a/packages/taler-wallet-core/src/db.ts b/packages/taler-wallet-core/src/db.ts
index 903dfa47d..9c57a79c1 100644
--- a/packages/taler-wallet-core/src/db.ts
+++ b/packages/taler-wallet-core/src/db.ts
@@ -361,11 +361,15 @@ export interface ExchangeDetailsRecord {
    * Terms of service text or undefined if not downloaded yet.
    *
    * This is just used as a cache of the last downloaded ToS.
+   * 
+   * FIXME:  Put in separate object store!
    */
   termsOfServiceText: string | undefined;
 
   /**
    * content-type of the last downloaded termsOfServiceText.
+   * 
+   * * FIXME:  Put in separate object store!
    */
   termsOfServiceContentType: string | undefined;
 
diff --git a/packages/taler-wallet-core/src/operations/pay.ts b/packages/taler-wallet-core/src/operations/pay.ts
index d41a20e71..8193bf86a 100644
--- a/packages/taler-wallet-core/src/operations/pay.ts
+++ b/packages/taler-wallet-core/src/operations/pay.ts
@@ -47,6 +47,7 @@ import {
   j2s,
   Logger,
   NotificationType,
+  parsePaytoUri,
   parsePayUri,
   PayCoinSelection,
   PreparePayResult,
@@ -241,6 +242,20 @@ export async function getCandidatePayCoins(
           continue;
         }
 
+        const wireTypes = new Set<string>();
+        for (const acc of exchangeDetails.wireInfo.accounts) {
+          const p = parsePaytoUri(acc.payto_uri);
+          if (p) {
+            wireTypes.add(p.targetType);
+          }
+        }
+
+        if (!wireTypes.has(req.wireMethod)) {
+          // Exchange can't be used, because it doesn't support
+          // the wire type that the merchant requested.
+          continue;
+        }
+
         // is the exchange explicitly allowed?
         for (const allowedExchange of req.allowedExchanges) {
           if (allowedExchange.exchangePub === exchangeDetails.masterPublicKey) {
@@ -1338,7 +1353,7 @@ export async function getContractTermsDetails(
     throw Error("proposal is in invalid state");
   }
 
-  return proposal.download.contractData
+  return proposal.download.contractData;
 }
 
 /**