Add an example script on how to upgrade a contract implementation

README.md

@@ -71,7 +71,7 @@ To run these scripts use `hardhat run`. For example: `hardhat run scripts/list-c
 
 Some scripts are also defined as npm script, see package.json.
 
-### repl.js
+### repl/console
 
 Similar to cli.js but only provides a REPL with an initialized `kredits`
 instance.
@@ -108,6 +108,9 @@ We use OpenZeppelin for an upgradeable contracts: [https://www.npmjs.com/package
 
 Refer to the OpenZeppelin README and `scripts/create-proxy.js`
 
+For an upgrade example checkout `scripts/upgrade-example.js`
+
+
 ## Known Issues
 
 When resetting ganache Metamask might have an invalid transaction nonce and

scripts/upgrade-example.js

@@ -0,0 +1,16 @@
+const { ethers, upgrades } = require("hardhat");
+const Kredits = require('../lib/kredits');
+
+async function main() {
+  const network = await hre.ethers.provider.getNetwork();
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner());
+  await kredits.init();
+
+  const ContributorV2 = await ethers.getContractFactory("Contributor");
+  const contributor = await upgrades.upgradeProxy(kredits.Contributor.address, ContributorV2);
+  console.log("Contributor upgraded");
+
+  console.log("DONE!");
+}
+
+main();