Add toAddress on HDChain

core-test/src/test/scala/org/bitcoins/core/hd/HDPathTest.scala

@@ -29,6 +29,15 @@ class HDPathTest extends BitcoinSUnitTest {
     }
   }
 
+  behavior of "HDChain"
+
+  it must "be convertable to an address" in {
+    forAll(HDGenerators.hdChain, NumberGenerator.positiveInts) { (chain, i) =>
+      val addr = chain.toAddress(i)
+      assert(addr.chain == chain)
+    }
+  }
+
   behavior of "HDAddress"
 
   it must "fail to make addresses with neagtives indices" in {

core/src/main/scala/org/bitcoins/core/hd/HDChain.scala

@@ -20,6 +20,9 @@ sealed abstract class HDChain extends BIP32Path {
 
   def toInt: Int = chainType.index
 
+  /** Given a index, creates a HD address */
+  def toAddress(index: Int): HDAddress = HDAddress(this, index = index)
+
 }
 
 object HDChain {