disambiguate new eth types

tests/helpers/handlers.nim

@@ -17,6 +17,8 @@ import
 
 type
   Hash256 = w3.Hash256
+  Address = w3.Address
+  FixedBytes[N: static int] = w3.FixedBytes[N]
 
 func decodeFromString(x: JsonString, T: type): T =
   let jsonBytes = JrpcConv.decode(x.string, string)

tests/test_signed_tx.nim

@@ -34,6 +34,9 @@ contract NumberStorage {
    }
 }
 ]#
+
+type Address = web3.Address
+
 contract(NumberStorage):
   proc setNumber(number: UInt256)
   proc getNumber(): UInt256 {.view.}