-towards testing purse creation

1 files changed, 397 insertions, 0 deletions

diff --git a/src/testing/testing_api_cmd_purse_create_deposit.c b/src/testing/testing_api_cmd_purse_create_deposit.c
new file mode 100644
index 000000000..8aeab744f
--- /dev/null
+++ b/src/testing/testing_api_cmd_purse_create_deposit.c
@@ -0,0 +1,397 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2022 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 3, or (at your
+  option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public
+  License along with TALER; see the file COPYING.  If not, see
+  <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file testing/testing_api_cmd_purse_create_deposit.c
+ * @brief command for testing /purses/$PID/create
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_json_lib.h"
+#include <gnunet/gnunet_curl_lib.h>
+#include "taler_testing_lib.h"
+#include "taler_signatures.h"
+#include "backoff.h"
+
+/**
+ * Information we keep per deposited coin.
+ */
+struct Coin
+{
+  /**
+   * Reference to the respective command.
+   */
+  const char *command_ref;
+
+  /**
+   * index of the specific coin in the traits of @e command_ref.
+   */
+  unsigned int coin_index;
+
+  /**
+   * Amount to deposit (with fee).
+   */
+  struct TALER_Amount deposit_with_fee;
+
+};
+
+
+/**
+ * State for a "purse create deposit" CMD.
+ */
+struct PurseCreateDepositState
+{
+
+  /**
+   * Total purse target amount without fees.
+   */
+  struct TALER_Amount target_amount;
+
+  /**
+   * Reference to any command that is able to provide a coin.
+   */
+  struct Coin *coin_references;
+
+  /**
+   * JSON string describing what a proposal is about.
+   */
+  json_t *contract_terms;
+
+  /**
+   * Purse expiration time.
+   */
+  struct GNUNET_TIME_Timestamp purse_expiration;
+
+  /**
+   * Relative purse expiration time.
+   */
+  struct GNUNET_TIME_Relative rel_expiration;
+
+  /**
+   * Set (by the interpreter) to a fresh private key.  This
+   * key will be used to create the purse.
+   */
+  struct TALER_PurseContractPrivateKeyP purse_priv;
+
+  /**
+   * Set (by the interpreter) to a fresh private key.  This
+   * key will be used to merge the purse.
+   */
+  struct TALER_PurseMergePrivateKeyP merge_priv;
+
+  /**
+   * Set (by the interpreter) to a fresh private key.  This
+   * key will be used to decrypt the contract.
+   */
+  struct TALER_ContractDiffiePrivateP contract_priv;
+
+  /**
+   * Signing key used by the exchange to sign the
+   * deposit confirmation.
+   */
+  struct TALER_ExchangePublicKeyP exchange_pub;
+
+  /**
+   * Signature from the exchange on the
+   * deposit confirmation.
+   */
+  struct TALER_ExchangeSignatureP exchange_sig;
+
+  /**
+   * Set (by the interpreter) to a public key corresponding
+   * to @e purse_priv.
+   */
+  struct TALER_PurseContractPublicKeyP purse_pub;
+
+  /**
+   * PurseCreateDeposit handle while operation is running.
+   */
+  struct TALER_EXCHANGE_PurseCreateDepositHandle *dh;
+
+  /**
+   * Interpreter state.
+   */
+  struct TALER_TESTING_Interpreter *is;
+
+  /**
+   * Expected HTTP response code.
+   */
+  unsigned int expected_response_code;
+
+  /**
+   * Length of the @e coin_references array.
+   */
+  unsigned int num_coin_references;
+
+  /**
+   * Should we upload the contract?
+   */
+  bool upload_contract;
+
+};
+
+
+/**
+ * Callback to analyze the /purses/$PID/create response, just used to check if
+ * the response code is acceptable.
+ *
+ * @param cls closure.
+ * @param dr deposit response details
+ */
+static void
+deposit_cb (void *cls,
+            const struct TALER_EXCHANGE_PurseCreateDepositResponse *dr)
+{
+  struct PurseCreateDepositState *ds = cls;
+
+  ds->dh = NULL;
+  if (ds->expected_response_code != dr->hr.http_status)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected response code %u to command %s in %s:%u\n",
+                dr->hr.http_status,
+                ds->is->commands[ds->is->ip].label,
+                __FILE__,
+                __LINE__);
+    json_dumpf (dr->hr.reply,
+                stderr,
+                0);
+    TALER_TESTING_interpreter_fail (ds->is);
+    return;
+  }
+  if (MHD_HTTP_OK == dr->hr.http_status)
+  {
+    ds->exchange_pub = dr->details.success.exchange_pub;
+    ds->exchange_sig = dr->details.success.exchange_sig;
+  }
+  TALER_TESTING_interpreter_next (ds->is);
+}
+
+
+/**
+ * Run the command.
+ *
+ * @param cls closure.
+ * @param cmd the command to execute.
+ * @param is the interpreter state.
+ */
+static void
+deposit_run (void *cls,
+             const struct TALER_TESTING_Command *cmd,
+             struct TALER_TESTING_Interpreter *is)
+{
+  struct PurseCreateDepositState *ds = cls;
+  struct TALER_EXCHANGE_PurseDeposit deposits[ds->num_coin_references];
+
+  (void) cmd;
+  ds->is = is;
+  for (unsigned int i = 0; i<ds->num_coin_references; i++)
+  {
+    const struct Coin *cr = &ds->coin_references[i];
+    struct TALER_EXCHANGE_PurseDeposit *pd = &deposits[i];
+    const struct TALER_TESTING_Command *coin_cmd;
+    const struct TALER_CoinSpendPrivateKeyP *coin_priv;
+    const struct TALER_AgeCommitmentProof *age_commitment_proof = NULL;
+    struct TALER_AgeCommitmentHash h_age_commitment = {0};
+    const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
+    const struct TALER_DenominationSignature *denom_pub_sig;
+
+    coin_cmd = TALER_TESTING_interpreter_lookup_command (is,
+                                                         cr->command_ref);
+    if (NULL == coin_cmd)
+    {
+      GNUNET_break (0);
+      TALER_TESTING_interpreter_fail (is);
+      return;
+    }
+
+    if ( (GNUNET_OK !=
+          TALER_TESTING_get_trait_coin_priv (coin_cmd,
+                                             cr->coin_index,
+                                             &coin_priv)) ||
+         (GNUNET_OK !=
+          TALER_TESTING_get_trait_age_commitment_proof (coin_cmd,
+                                                        cr->coin_index,
+                                                        &age_commitment_proof))
+         ||
+         (GNUNET_OK !=
+          TALER_TESTING_get_trait_denom_pub (coin_cmd,
+                                             cr->coin_index,
+                                             &denom_pub)) ||
+         (GNUNET_OK !=
+          TALER_TESTING_get_trait_denom_sig (coin_cmd,
+                                             cr->coin_index,
+                                             &denom_pub_sig)) )
+    {
+      GNUNET_break (0);
+      TALER_TESTING_interpreter_fail (is);
+      return;
+    }
+    if (NULL != age_commitment_proof)
+    {
+      TALER_age_commitment_hash (&age_commitment_proof->commitment,
+                                 &h_age_commitment);
+    }
+#if FIXME_OEC
+    pd->age_commitment = *h_age_commitment;
+#endif
+    pd->denom_sig = *denom_pub_sig;
+    pd->coin_priv = *coin_priv;
+    pd->amount = cr->deposit_with_fee;
+    pd->h_denom_pub = denom_pub->h_key;
+  }
+
+  GNUNET_CRYPTO_eddsa_key_create (&ds->purse_priv.eddsa_priv);
+  GNUNET_CRYPTO_eddsa_key_create (&ds->merge_priv.eddsa_priv);
+  GNUNET_CRYPTO_ecdhe_key_create (&ds->contract_priv.ecdhe_priv);
+  ds->purse_expiration
+    = GNUNET_TIME_relative_to_timestamp (ds->rel_expiration);
+  GNUNET_CRYPTO_eddsa_key_get_public (&ds->purse_priv.eddsa_priv,
+                                      &ds->purse_pub.eddsa_pub);
+  ds->dh = TALER_EXCHANGE_purse_create_with_deposit (
+    is->exchange,
+    &ds->purse_priv,
+    &ds->merge_priv,
+    &ds->contract_priv,
+    ds->contract_terms,
+    ds->purse_expiration,
+    ds->num_coin_references,
+    deposits,
+    ds->upload_contract,
+    &deposit_cb,
+    ds);
+  if (NULL == ds->dh)
+  {
+    GNUNET_break (0);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not create purse with deposit\n");
+    TALER_TESTING_interpreter_fail (is);
+    return;
+  }
+}
+
+
+/**
+ * Free the state of a "deposit" CMD, and possibly cancel a
+ * pending operation thereof.
+ *
+ * @param cls closure, must be a `struct PurseCreateDepositState`.
+ * @param cmd the command which is being cleaned up.
+ */
+static void
+deposit_cleanup (void *cls,
+                 const struct TALER_TESTING_Command *cmd)
+{
+  struct PurseCreateDepositState *ds = cls;
+
+  if (NULL != ds->dh)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Command %u (%s) did not complete\n",
+                ds->is->ip,
+                cmd->label);
+    TALER_EXCHANGE_purse_create_with_deposit_cancel (ds->dh);
+    ds->dh = NULL;
+  }
+  json_decref (ds->contract_terms);
+  GNUNET_free (ds->coin_references);
+  GNUNET_free (ds);
+}
+
+
+/**
+ * Offer internal data from a "deposit" CMD, to other commands.
+ *
+ * @param cls closure.
+ * @param[out] ret result.
+ * @param trait name of the trait.
+ * @param index index number of the object to offer.
+ * @return #GNUNET_OK on success.
+ */
+static enum GNUNET_GenericReturnValue
+deposit_traits (void *cls,
+                const void **ret,
+                const char *trait,
+                unsigned int index)
+{
+  struct PurseCreateDepositState *ds = cls;
+  struct TALER_TESTING_Trait traits[] = {
+    TALER_TESTING_make_trait_merge_priv (&ds->merge_priv),
+    TALER_TESTING_make_trait_contract_priv (&ds->contract_priv),
+    TALER_TESTING_make_trait_purse_priv (&ds->purse_priv),
+    TALER_TESTING_make_trait_purse_pub (&ds->purse_pub),
+    TALER_TESTING_make_trait_contract_terms (ds->contract_terms),
+    TALER_TESTING_make_trait_deposit_amount (&ds->target_amount),
+    TALER_TESTING_make_trait_timestamp (index,
+                                        &ds->purse_expiration),
+    TALER_TESTING_trait_end ()
+  };
+
+  return TALER_TESTING_get_trait (traits,
+                                  ret,
+                                  trait,
+                                  index);
+}
+
+
+struct TALER_TESTING_Command
+TALER_TESTING_cmd_purse_create_with_deposit (
+  const char *label,
+  unsigned int expected_http_status,
+  const char *target_amount,
+  const char *contract_terms,
+  bool upload_contract,
+  struct GNUNET_TIME_Relative purse_expiration,
+  ...)
+{
+  struct PurseCreateDepositState *ds;
+
+  ds = GNUNET_new (struct PurseCreateDepositState);
+  ds->rel_expiration = purse_expiration;
+  ds->upload_contract = upload_contract;
+  ds->expected_response_code = expected_http_status;
+  ds->contract_terms = json_loads (contract_terms,
+                                   JSON_REJECT_DUPLICATES,
+                                   NULL);
+  if (NULL == ds->contract_terms)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to parse contract terms `%s' for CMD `%s'\n",
+                contract_terms,
+                label);
+    GNUNET_assert (0);
+  }
+  // FIXME: parse varargs!
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount (target_amount,
+                                         &ds->target_amount));
+  {
+    struct TALER_TESTING_Command cmd = {
+      .cls = ds,
+      .label = label,
+      .run = &deposit_run,
+      .cleanup = &deposit_cleanup,
+      .traits = &deposit_traits
+    };
+
+    return cmd;
+  }
+}
+
+
+/* end of testing_api_cmd_purse_create_deposit.c */