Use uint256

README.md

@@ -14,6 +14,16 @@ This example project includes:
 
 
 
+## Install
+
+To install dependencies, run:
+
+```shell
+npm install
+```
+
+
+
 ## Building
 
 To build, run:

contracts/Counter.sol

@@ -8,7 +8,7 @@ contract Counter {
     x++;
   }
 
-  function incBy(uint by) public {
+  function incBy(uint256 by) public {
     require(by > 0, "incBy: increment should be positive");
     x += by;
   }