From 47659e73d7f43b9ca13a1092f6c9f45af72591cb Mon Sep 17 00:00:00 2001
From: Andreas Schildbach <andreas.schildbach@bloq.com>
Date: Sun, 27 Jan 2019 00:54:59 +0100
Subject: [PATCH] Address: Add fromKey() helper method.

---
 .../main/java/org/bitcoinj/core/Address.java  | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/core/src/main/java/org/bitcoinj/core/Address.java b/core/src/main/java/org/bitcoinj/core/Address.java
index 48c6cce0..82d2dde0 100644
--- a/core/src/main/java/org/bitcoinj/core/Address.java
+++ b/core/src/main/java/org/bitcoinj/core/Address.java
@@ -18,6 +18,7 @@ package org.bitcoinj.core;
 
 import javax.annotation.Nullable;
 
+import org.bitcoinj.script.Script;
 import org.bitcoinj.script.Script.ScriptType;
 
 /**
@@ -67,6 +68,26 @@ public abstract class Address extends PrefixedChecksummedBytes {
         }
     }
 
+    /**
+     * Construct an {@link Address} that represents the public part of the given {@link ECKey}.
+     * 
+     * @param params
+     *            network this address is valid for
+     * @param key
+     *            only the public part is used
+     * @param outputScriptType
+     *            script type the address should use
+     * @return constructed address
+     */
+    public static Address fromKey(final NetworkParameters params, final ECKey key, final ScriptType outputScriptType) {
+        if (outputScriptType == Script.ScriptType.P2PKH)
+            return LegacyAddress.fromKey(params, key);
+        else if (outputScriptType == Script.ScriptType.P2WPKH)
+            return SegwitAddress.fromKey(params, key);
+        else
+            throw new IllegalArgumentException(outputScriptType.toString());
+    }
+
     /**
      * Get either the public key hash or script hash that is encoded in the address.
      *