From 047ec4abaa54d4974ab4ad1da8f185084591a103 Mon Sep 17 00:00:00 2001
From: Jason Davies <jason@jasondavies.com>
Date: Wed, 18 Sep 2019 12:36:02 +0100
Subject: [PATCH] Add Ergo (ERG) without Bouncy Castle dependency.

See #3195.
---
 .../src/main/java/bisq/asset/coins/Ergo.java  | 53 +++++++++++++++++++
 .../META-INF/services/bisq.asset.Asset        |  1 +
 .../test/java/bisq/asset/coins/ErgoTest.java  | 47 ++++++++++++++++
 3 files changed, 101 insertions(+)
 create mode 100644 assets/src/main/java/bisq/asset/coins/Ergo.java
 create mode 100644 assets/src/test/java/bisq/asset/coins/ErgoTest.java

diff --git a/assets/src/main/java/bisq/asset/coins/Ergo.java b/assets/src/main/java/bisq/asset/coins/Ergo.java
new file mode 100644
index 00000000000..fd9ae801cda
--- /dev/null
+++ b/assets/src/main/java/bisq/asset/coins/Ergo.java
@@ -0,0 +1,53 @@
+/*
+ * This file is part of Bisq.
+ *
+ * Bisq is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Bisq 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 Affero General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Bisq. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package bisq.asset.coins;
+
+import bisq.asset.AddressValidationResult;
+import bisq.asset.AddressValidator;
+import bisq.asset.Coin;
+
+import java.util.Arrays;
+
+import org.bitcoinj.core.Base58;
+import org.bitcoinj.core.AddressFormatException;
+
+public class Ergo extends Coin {
+
+    public Ergo() {
+        super("Ergo", "ERG", new ErgoAddressValidator());
+    }
+
+    public static class ErgoAddressValidator implements AddressValidator {
+
+        @Override
+        public AddressValidationResult validate(String address) {
+            try {
+                byte[] decoded  = Base58.decode(address);
+                if (decoded.length < 4) {
+                    return AddressValidationResult.invalidAddress("Input too short: " + decoded.length);
+                }
+                if (decoded[0] != 1 && decoded[0] != 2 && decoded[0] != 3) {
+                    return AddressValidationResult.invalidAddress("Invalid prefix");
+                }
+            } catch (AddressFormatException e) {
+                return AddressValidationResult.invalidAddress(e);
+            }
+            return AddressValidationResult.validAddress();
+        }
+    }
+}
diff --git a/assets/src/main/resources/META-INF/services/bisq.asset.Asset b/assets/src/main/resources/META-INF/services/bisq.asset.Asset
index 33c63a2a430..69e7b11d763 100644
--- a/assets/src/main/resources/META-INF/services/bisq.asset.Asset
+++ b/assets/src/main/resources/META-INF/services/bisq.asset.Asset
@@ -40,6 +40,7 @@ bisq.asset.coins.Donu
 bisq.asset.coins.Dragonglass
 bisq.asset.coins.DSTRA
 bisq.asset.coins.Emercoin
+bisq.asset.coins.Ergo
 bisq.asset.coins.Ether
 bisq.asset.coins.EtherClassic
 bisq.asset.coins.FourtyTwo
diff --git a/assets/src/test/java/bisq/asset/coins/ErgoTest.java b/assets/src/test/java/bisq/asset/coins/ErgoTest.java
new file mode 100644
index 00000000000..213769cd81a
--- /dev/null
+++ b/assets/src/test/java/bisq/asset/coins/ErgoTest.java
@@ -0,0 +1,47 @@
+/*
+ * This file is part of Bisq.
+ *
+ * Bisq is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Bisq 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 Affero General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Bisq. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package bisq.asset.coins;
+
+import bisq.asset.AbstractAssetTest;
+
+import org.junit.Test;
+
+public class ErgoTest extends AbstractAssetTest {
+
+    public ErgoTest() {
+        super(new Ergo());
+    }
+
+    @Test
+    public void testValidAddresses() {
+        assertValidAddress("9fRAWhdxEsTcdb8PhGNrZfwqa65zfkuYHAMmkQLcic1gdLSV5vA");
+        assertValidAddress("25qGdVWg2yyYho8uC1pLtc7KxFn4nEEAwD");
+        assertValidAddress("23NL9a8ngN28ovtLiKLgHexcdTKBbUMLhH");
+        assertValidAddress("7bwdkU5V8");
+        assertValidAddress("BxKBaHkvrTvLZrDcZjcsxsF7aSsrN73ijeFZXtbj4CXZHHcvBtqSxQ");
+    }
+
+    @Test
+    public void testInvalidAddresses() {
+        assertInvalidAddress("9fRAWhdxEsTcdb8PhGNrZfwqa65zfkuYHAMmkQLcic1gdLSV5vAaa");
+        assertInvalidAddress("25qGdVWg2yyYho8uC1pLtc7KxFn4nEEAwDaa");
+        assertInvalidAddress("23NL9a8ngN28ovtLiKLgHexcdTKBbUMLhHaa");
+        assertInvalidAddress("7bwdkU5V8aa");
+        assertInvalidAddress("BxKBaHkvrTvLZrDcZjcsxsF7aSsrN73ijeFZXtbj4CXZHHcvBtqSxQ#");
+    }
+}