1 files changed, 6 insertions, 1 deletions

diff --git a/doc/sphinx/rest.rst b/doc/sphinx/rest.rst
index 7aa645d..a9f78a9 100644
--- a/doc/sphinx/rest.rst
+++ b/doc/sphinx/rest.rst
@@ -661,7 +661,12 @@ charge per truth operation using GNU Taler.
       business_name: string;
 
       // What is the expected wire transfer subject?
-      wire_transfer_subject: number;
+      wire_transfer_subject: string;
+
+      // What is the numeric code (also part of the
+      // wire transfer subject) to be hashed when
+      // solving the challenge?
+      answer_code: number;
 
       // Hint about the origin account that must be used.
       debit_account_hint: string;