-document another case for a 409

1 files changed, 3 insertions, 1 deletions

diff --git a/core/api-merchant.rst b/core/api-merchant.rst
index 1d359fe5..3bbd07d9 100644
--- a/core/api-merchant.rst
+++ b/core/api-merchant.rst
@@ -252,6 +252,8 @@ Making the payment
     The exchange rejected the payment because a coin was already spent.
     The response will include the ``coin_pub`` for which the payment failed,
     in addition to the response from the exchange to the ``/deposit`` request.
+    Also returned if the currency of the deposit permissions does not match
+    the currency used by the merchant.
   :http:statuscode:`410 Gone`:
     The offer has expired and is no longer available.
   :http:statuscode:`412 Precondition failed`:
@@ -2877,7 +2879,7 @@ The contract terms must have the following structure:
 
     // Map from IETF BCP 47 language tags to localized fulfillment
     // messages.
-    fulfillment_message_i18n: { [lang_tag: string]: string };
+    fulfillment_message_i18n?: { [lang_tag: string]: string };
 
     // Maximum total deposit fee accepted by the merchant for this contract.
     max_fee: Amount;