From 874b52c6d5c0d8043f3250e2b80f5091c159ded1 Mon Sep 17 00:00:00 2001
From: Torsten Grote <t@grobox.de>
Date: Wed, 8 Apr 2020 14:21:11 -0300
Subject: [wallet] add option to see exchange's fee structure

---
 .../java/net/taler/wallet/withdraw/ExchangeFees.kt | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 wallet/src/main/java/net/taler/wallet/withdraw/ExchangeFees.kt

(limited to 'wallet/src/main/java/net/taler/wallet/withdraw/ExchangeFees.kt')

diff --git a/wallet/src/main/java/net/taler/wallet/withdraw/ExchangeFees.kt b/wallet/src/main/java/net/taler/wallet/withdraw/ExchangeFees.kt
new file mode 100644
index 0000000..4494e38
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/withdraw/ExchangeFees.kt
@@ -0,0 +1,99 @@
+/*
+ * 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.wallet.withdraw
+
+import net.taler.common.Amount
+import net.taler.common.Timestamp
+import org.json.JSONObject
+
+data class CoinFee(
+    val coin: Amount,
+    val feeDeposit: Amount,
+    val feeRefresh: Amount,
+    val feeRefund: Amount,
+    val feeWithdraw: Amount
+)
+
+data class CoinFees(
+    val quantity: Int,
+    val coinFee: CoinFee
+)
+
+data class WireFee(
+    val start: Timestamp,
+    val end: Timestamp,
+    val wireFee: Amount,
+    val closingFee: Amount
+)
+
+data class ExchangeFees(
+    val withdrawFee: Amount,
+    val overhead: Amount,
+    val earliestDepositExpiration: Timestamp,
+    val coinFees: List<CoinFees>,
+    val wireFees: List<WireFee>
+) {
+    companion object {
+        fun fromExchangeWithdrawDetailsJson(json: JSONObject): ExchangeFees {
+            val earliestDepositExpiration =
+                json.getJSONObject("earliestDepositExpiration").getLong("t_ms")
+
+            val selectedDenoms = json.getJSONArray("selectedDenoms")
+            val coinFees = HashMap<CoinFee, Int>(selectedDenoms.length())
+            for (i in 0 until selectedDenoms.length()) {
+                val denom = selectedDenoms.getJSONObject(i)
+                val coinFee = CoinFee(
+                    coin = Amount.fromJsonObject(denom.getJSONObject("value")),
+                    feeDeposit = Amount.fromJsonObject(denom.getJSONObject("feeDeposit")),
+                    feeRefresh = Amount.fromJsonObject(denom.getJSONObject("feeRefresh")),
+                    feeRefund = Amount.fromJsonObject(denom.getJSONObject("feeRefund")),
+                    feeWithdraw = Amount.fromJsonObject(denom.getJSONObject("feeWithdraw"))
+                )
+                coinFees[coinFee] = (coinFees[coinFee] ?: 0) + 1
+            }
+
+            val wireFeesJson = json.getJSONObject("wireFees")
+            val feesForType = wireFeesJson.getJSONObject("feesForType")
+            val bankFees = feesForType.getJSONArray("x-taler-bank")
+            val wireFees = ArrayList<WireFee>(bankFees.length())
+            for (i in 0 until bankFees.length()) {
+                val fee = bankFees.getJSONObject(i)
+                val startStamp =
+                    fee.getJSONObject("startStamp").getLong("t_ms")
+                val endStamp =
+                    fee.getJSONObject("endStamp").getLong("t_ms")
+                val wireFee = WireFee(
+                    start = Timestamp(startStamp),
+                    end = Timestamp(endStamp),
+                    wireFee = Amount.fromJsonObject(fee.getJSONObject("wireFee")),
+                    closingFee = Amount.fromJsonObject(fee.getJSONObject("closingFee"))
+                )
+                wireFees.add(wireFee)
+            }
+
+            return ExchangeFees(
+                withdrawFee = Amount.fromJsonObject(json.getJSONObject("withdrawFee")),
+                overhead = Amount.fromJsonObject(json.getJSONObject("overhead")),
+                earliestDepositExpiration = Timestamp(earliestDepositExpiration),
+                coinFees = coinFees.map { (coinFee, quantity) ->
+                    CoinFees(quantity, coinFee)
+                },
+                wireFees = wireFees
+            )
+        }
+    }
+}
-- 
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