1 files changed, 11 insertions, 0 deletions
diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index 8ce10b722..dae730d0e 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -1084,7 +1084,18 @@ struct TALER_ContractPS
  */
 struct PaymentResponsePS
 {
+  /**
+   * Set to TALER_SIGNATURE_MERCHANT_PAYMENT_OK so far. Note that
+   * unsuccessful payments are usually proven by some exchange's signature,
+   * thus it is unlikely that a merchant needs to set a purpose other than
+   * the above mentioned
+   */
   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+
+  /**
+   * Hash of the contract associated with this confirmation
+   */
+  struct GNUNET_HashCode h_contract;
 };