Fixed TTInt rlp encoding. Fixes #9. (#12)

.travis.yml

@@ -1,9 +1,6 @@
 matrix:
-  allow_failures:
-    # disabled for the moment: https://github.com/status-im/nimbus/issues/9
-    # Installing GCC-7 on travis is not straightforward due to hombrew conflict:
-    # https://travis-ci.org/status-im/nimbus/jobs/365157366#L2322
-    - os: osx
+  # allow_failures:
+  #   - os: osx
 
   include:
     - os: linux

nim.cfg

@@ -1,11 +0,0 @@
-# TODO - https://github.com/status-im/nimbus/issues/9
-# Workaround for Rlp + TT-math:
-# use GCC on MacOS
-
-@if macosx:
-  cc:"gcc"
-  gcc.exe:"/usr/local/bin/gcc-7"
-  gcc.linkerexe:"/usr/local/bin/gcc-7"
-  gcc.cpp.exe:"/usr/local/bin/g++-7"
-  gcc.cpp.linkerexe:"/usr/local/bin/g++-7"
-@end

src/db/state_db.nim

@@ -68,7 +68,7 @@ proc setStorage*(db: var AccountStateDB, address: string, slot: UInt256, value:
   var storage = db.db
   # TODO fix
   if value > 0:
-    let encodedValue = rlp.encode value.table # TODO This is a hack, RLP encoding ttmath table has issues
+    let encodedValue = rlp.encode value.toByteArrayBE
     storage[slotAsKey] = encodedValue.decode(Bytes)
   else:
     storage.del(slotAsKey)