fixing compilation errors

core/src/main/scala/org/bitcoins/core/gcs/GCS.scala

@@ -21,7 +21,7 @@ object GCS {
     */
   def buildGCS(
       data: Vector[ByteVector],
-      key: ByteVector,
+      key: SipHashKey,
       p: UInt8,
       m: UInt64): BitVector = {
     val hashedValues = hashedSetConstruct(data, key, m)
@@ -34,7 +34,7 @@ object GCS {
     */
   def buildGolombFilter(
       data: Vector[ByteVector],
-      key: ByteVector,
+      key: SipHashKey,
       p: UInt8,
       m: UInt64): GolombFilter = {
     val encodedData = buildGCS(data, key, p, m)
@@ -48,14 +48,14 @@ object GCS {
     */
   def buildBasicBlockFilter(
       data: Vector[ByteVector],
-      key: ByteVector): GolombFilter = {
+      key: SipHashKey): GolombFilter = {
     buildGolombFilter(data, key, BlockFilter.P, BlockFilter.M)
   }
 
   //item remains bytevector key to be changed create new file in GCS folder that redefines sipkeyhash
   //will probably have a require statement bytevector length of 16 bytes or 128 bits. Add a couple methods
   //to turn the key into an array of bytes (look to toArray method on line 65)
-  private def sipHash(item: ByteVector, key: ByteVector): UInt64 = {
+  private def sipHash(item: ByteVector, key: SipHashKey): UInt64 = {
     // https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki#hashing-data-objects
     val sipHashCParam = 2
     val sipHashDParam = 4
@@ -79,7 +79,7 @@ object GCS {
     * Hashes the item to the range [0, f)
     * @see [[https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki#hashing-data-objects]]
     */
-  def hashToRange(item: ByteVector, f: UInt64, key: ByteVector): UInt64 = {
+  def hashToRange(item: ByteVector, f: UInt64, key: SipHashKey): UInt64 = {
     val hash = sipHash(item, key)
 
     val bigInt = (hash.toBigInt * f.toBigInt) >> 64
@@ -93,7 +93,7 @@ object GCS {
     */
   def hashedSetConstruct(
       rawItems: Vector[ByteVector],
-      key: ByteVector,
+      key: SipHashKey,
       m: UInt64): Vector[UInt64] = {
     val n = rawItems.length
     val f = m * n

core/src/main/scala/org/bitcoins/core/gcs/GolombFilter.scala

@@ -24,7 +24,7 @@ import scala.annotation.tailrec
   * TODO: Replace ByteVector with a type for keys
   */
 case class GolombFilter(
-    key: ByteVector,
+    key: SipHashKey,
     m: UInt64,
     p: UInt8,
     n: CompactSizeUInt,
@@ -149,7 +149,7 @@ object BlockFilter {
   def apply(
       block: Block,
       prevOutputScripts: Vector[ScriptPubKey]): GolombFilter = {
-    val key = block.blockHeader.hash.bytes.take(16)
+    val key: SipHashKey = block.blockHeader.hash.bytes.take(16)
 
     val newScriptPubKeys: Vector[ByteVector] =
       getOutputScriptPubKeysFromBlock(block).map(_.asmBytes)

core/src/main/scala/org/bitcoins/core/gcs/SipHashKey.scala

@@ -1,3 +1,4 @@
+package org.bitcoins.core.gcs
 import scodec.bits.ByteVector
 case class SipHashKey(bytes: ByteVector) {
   require(