ECPair/HDNode: missing version from list is Unknown, not Invalid

src/ecpair.js

@@ -66,6 +66,8 @@ ECPair.fromWIF = function (string, network) {
     network = network.filter(function (network) {
       return version === network.wif
     }).pop()
+
+    if (!network) throw new Error('Unknown network version')
   }
 
   network = network || NETWORKS.bitcoin

src/hdnode.js

@@ -66,7 +66,7 @@ HDNode.fromBase58 = function (string, networks) {
              version === network.bip32.public
     }).pop()
 
-    if (!network) throw new Error('Invalid network version')
+    if (!network) throw new Error('Unknown network version')
 
   // otherwise, assume a network object (or default to bitcoin)
   } else {