[pos] Implement new refund API (untested since there is no wallet support)

Also do a bit of code cleanup and minor refactorings

This also removes the volley HTTP library which is not needed anymore

1 files changed, 43 insertions, 0 deletions

diff --git a/merchant-lib/src/main/java/net/taler/merchantlib/Refunds.kt b/merchant-lib/src/main/java/net/taler/merchantlib/Refunds.kt
new file mode 100644
index 0000000..61f0ab7
--- /dev/null
+++ b/merchant-lib/src/main/java/net/taler/merchantlib/Refunds.kt
@@ -0,0 +1,43 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU 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.
+ *
+ * GNU 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
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.merchantlib
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import net.taler.common.Amount
+
+@Serializable
+data class RefundRequest(
+    /**
+     * Amount to be refunded
+     */
+    val refund: Amount,
+
+    /**
+     * Human-readable refund justification
+     */
+    val reason: String
+)
+
+@Serializable
+data class RefundResponse(
+    /**
+     * URL (handled by the backend) that the wallet should access to trigger refund processing.
+     */
+    @SerialName("taler_refund_uri")
+    val talerRefundUri: String
+)