fix: ethereum nonce exported as number

src/lua/zencode_ethereum.lua

@@ -85,8 +85,13 @@ ZEN.add_schema(
 			      export = O.to_hex },
       ethereum_address = { import = O.from_hex,
 			   export = O.to_hex },
-      ethereum_nonce = function(obj)
-	 return ZEN.get(obj, '.', INT.new, tonumber) end,
+      -- TODO generic import from string in zenroom.big,
+      -- if a number begins with 0x import it as hex
+      -- otherwise as decimal (here we have to use tonumber
+      -- in order to contemplate hex strings)
+      ethereum_nonce = { import = function(o)
+                                    return INT.new(tonumber(o)) end,
+                         export = function(o) return o:decimal() end },
       ethereum_transaction = { import = import_eth_tx,
 			       export = export_eth_tx },
       signed_ethereum_transaction = { import = O.from_hex,