ci: add contracts upgradability check (#188)

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## Overview

Closes #187

## Checklist

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- [ ] New and updated code has appropriate documentation
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---------

Co-authored-by: John Adler <[email protected]>

Author: rach-id

.github/workflows/contract-inheritance-check.yml

@@ -0,0 +1,28 @@
+name: Check Contract Inheritance
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  check_inheritance:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+
+      - name: Install Surya
+        run: |
+          npm install -g surya
+
+      - name: Run Surya Inheritance Check
+        run: |
+          ./scripts/upgradability_check.sh

scripts/upgradability_check.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# this script will check if the QGB contract is inheriting the correct upgradability contracts.
+
+out=$(surya inheritance src/QuantumGravityBridge.sol | grep -i "\"QuantumGravityBridge\" ->" | cut -d ">" -f 2  | sed 's/[";]//g')
+
+required_contracts=("Initializable" "UUPSUpgradeable" "OwnableUpgradeable")
+missing_contracts=()
+
+for field in "${required_contracts[@]}"; do
+    if ! grep -q "\<$field\>" <<< "$out"; then
+        missing_contracts+=("$field")
+    fi
+done
+
+if [ ${#missing_contracts[@]} -eq 0 ]; then
+    echo "The QuantumGravityBridge contract is inheriting the right contracts. Exiting."
+    exit 0
+else
+    echo "The QuantumGravityBridge contract is missing the necessary inherited contracts: ${missing_contracts[*]}"
+    exit 1
+fi