Use temporary venv to use bech32 in python script

.gitignore

@@ -1,6 +1,7 @@
 *-deployment
 *-spec.yml
 mainnet-genesis
+output
 
 # Playbook vars
 *-vars.yml

scripts/generate-mainnet-genesis.sh

@@ -37,12 +37,18 @@ docker run \
 # --------
 
 # Install required bech32 dependency
-# TODO: Avoid installing bech32 system-wide
-python3 -m pip install bech32 --break-system-packages
+# Define and create venv if not exists
+venv_dir="$PWD/venv"
+if [ ! -d "$venv_dir" ]; then
+    python3 -m venv "$venv_dir"
+    "$venv_dir/bin/pip" install bech32
+fi
 
-# Carry over state from testnet to mainnet
 echo "Carrying over state from testnet state to mainnet genesis..."
-python3 $script_dir/transfer-state.py
+"$venv_dir/bin/python" "$script_dir/transfer-state.py"
+
+# Clean up venv
+rm -rf "$venv_dir"
 
 # --------