add caqti device

src/config.ml

@@ -7,9 +7,9 @@ let dummy_duration = Ptime.Span.of_int_s 99999999
 module Exchange = struct
   let currency = "EUR"
   let currency_round_unit = amount "EUR:0.01"
-  let db = "postgres"
+  let db = `Pgx (* plugin to use for the database *)
   let attribute_encryption_key = "uhuhg" (* high-entropy nonce. *)
-  let port = 3696
+  let port = 3434
 
   let master_public_key =
     "8MQF2XPWCKCW4199JFPE08X7Y9XAX21SF2HD8NZKXM3PY3CMCJ90===="
@@ -57,6 +57,26 @@ module Secmod_eddsa = struct
   let key_dir = Fpath.(v "eddsa")
 end
 
+module Exchangedb = struct
+  let idle_reserve_expiration_time = dummy_duration
+  let legal_reserve_expiration_time = dummy_duration
+  let aggregator_shift = dummy_duration
+  let default_purse_limit = 9999
+  let max_aml_program_runtime = dummy_duration
+end
+
+module Exchangedb_postgres = struct
+  (* pgx://<user>:<password>@<host-or-directory>:<port>/<database> *)
+  let config =
+    let user = "mte" in
+    let password = "hunter2" in
+    let host = "localhost" in
+    let port = 5432 in
+    let database = "taler-exchange" in
+    Uri.of_string
+    @@ Fmt.str "pgx://%s:%s@%s:%d/%s" user password host port database
+end
+
 let coin_kudo_1 =
   Types.Config_types.Coin.
     {