remove redundant old_coin_pub from link data

src/exchangedb/exchange-0001.sql

@@ -341,10 +341,12 @@ COMMENT ON TABLE wire_out
 CREATE TABLE IF NOT EXISTS aggregation_tracking
   (aggregation_serial_id BIGSERIAL UNIQUE
   ,deposit_serial_id INT8 PRIMARY KEY REFERENCES deposits (deposit_serial_id) ON DELETE CASCADE
-  ,wtid_raw BYTEA  CONSTRAINT wire_out_ref REFERENCES wire_out(wtid_raw) ON DELETE CASCADE DEFERRABLE
+  ,wtid_raw BYTEA CONSTRAINT wire_out_ref REFERENCES wire_out(wtid_raw) ON DELETE CASCADE DEFERRABLE
   );
 COMMENT ON TABLE aggregation_tracking
   IS 'mapping from wire transfer identifiers (WTID) to deposits (and back)';
+COMMENT ON COLUMN aggregation_tracking.wtid_raw
+  IS 'We first create entries in the aggregation_tracking table and then finally the wire_out entry once we know the total amount. Hence the constraint must be deferrable and we cannot use a wireout_uuid here, because we do not have it when these rows are created. Changing the logic to first INSERT a dummy row into wire_out and then UPDATEing that row in the same transaction would theoretically reduce per-deposit storage costs by 5 percent (24/~460 bytes).';
 
 CREATE INDEX IF NOT EXISTS aggregation_tracking_wtid_index
   ON aggregation_tracking

src/include/taler_exchangedb_plugin.h

@@ -303,19 +303,56 @@ struct TALER_EXCHANGEDB_TableData
 
     struct
     {
-      struct TALER_MerchantPublicKeyP merchant_pub; // FIXME
       struct TALER_MerchantSignatureP merchant_sig;
-      struct GNUNET_HashCode h_contract_terms; // FIXME
       uint64_t rtransaction_id;
       struct TALER_Amount amount_with_fee;
-      uint64_t known_coin_id;
+      uint64_t deposit_serial_id;
     } refunds;
 
-    struct {} wire_out;
+    struct
-    struct {} aggregation_tracking;
+    {
-    struct {} wire_fee;
+      struct GNUNET_TIME_Absolute execution_date;
-    struct {} recoup;
+      struct TALER_WireTransferIdentifierRawP wtid_raw;
-    struct {} recoup_refresh;
+      json_t *wire_target;
+      char *exchange_account_section;
+      struct TALER_Amount amount;
+    } wire_out;
+
+    struct
+    {
+      uint64_t deposit_serial_id;
+      struct TALER_WireTransferIdentifierRawP wtid_raw;
+    } aggregation_tracking;
+
+    struct
+    {
+      char *wire_method;
+      struct GNUNET_TIME_Absolute start_date;
+      struct GNUNET_TIME_Absolute end_date;
+      struct TALER_Amount wire_fee;
+      struct TALER_Amount closing_fee;
+      struct TALER_MasterSignatureP master_sig;
+    } wire_fee;
+
+    struct
+    {
+      struct TALER_CoinSpendSignatureP coin_sig;
+      struct TALER_DenominationBlindingKeyP coin_blind;
+      struct TALER_Amount amount;
+      struct GNUNET_TIME_Absolute timestamp;
+      uint64_t known_coin_id;
+      uint64_t reserve_out_serial_id;
+    } recoup;
+
+    struct
+    {
+      struct TALER_CoinSpendSignatureP coin_sig;
+      struct TALER_DenominationBlindingKeyP coin_blind;
+      struct TALER_Amount amount;
+      struct GNUNET_TIME_Absolute timestamp;
+      uint64_t known_coin_id;
+      uint64_t rrc_serial;
+    } recoup_refresh;
 
   } details;
 
@@ -1638,7 +1675,7 @@ typedef int
  *
  * @param cls closure
  * @param rowid unique serial ID for the refresh session in our DB
- * @param reserve_pub public key of the reserve (also the WTID)
+ * @param reserve_pub public key of the reserve (also the wire subject)
  * @param credit amount that was received
  * @param sender_account_details information about the sender's bank account, in payto://-format
  * @param wire_reference unique identifier for the wire transfer

src/include/taler_signatures.h

@@ -377,11 +377,6 @@ struct TALER_LinkDataPS
    */
   struct GNUNET_HashCode h_denom_pub;
 
-  /**
-   * Public key of the old coin being refreshed.
-   */
-  struct TALER_CoinSpendPublicKeyP old_coin_pub;
-
   /**
    * Transfer public key (for which the private key was not revealed)
    */

src/util/wallet_signatures.c

@@ -41,8 +41,6 @@ TALER_wallet_link_sign (const struct GNUNET_HashCode *h_denom_pub,
   GNUNET_CRYPTO_hash (coin_ev,
                       coin_ev_size,
                       &ldp.coin_envelope_hash);
-  GNUNET_CRYPTO_eddsa_key_get_public (&old_coin_priv->eddsa_priv,
-                                      &ldp.old_coin_pub.eddsa_pub);
   GNUNET_CRYPTO_eddsa_sign (&old_coin_priv->eddsa_priv,
                             &ldp,
                             &coin_sig->eddsa_signature);
@@ -62,7 +60,6 @@ TALER_wallet_link_verify (
     .purpose.size = htonl (sizeof (ldp)),
     .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_LINK),
     .h_denom_pub = *h_denom_pub,
-    .old_coin_pub = *old_coin_pub,
     .transfer_pub = *transfer_pub
   };