Standardize deployment env and deployer handling

scripts/deployment/deploy-multicall.sh

@@ -8,17 +8,6 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/../lib/init.sh"
 PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
 
-RPC_URL="${RPC_URL:-http://localhost:8545}"
-PRIVATE_KEY="${PRIVATE_KEY:-}"
-
-if [ -z "$PRIVATE_KEY" ]; then
-    echo "Error: PRIVATE_KEY environment variable not set"
-    exit 1
-fi
-
-echo "Deploying Multicall to ChainID 138..."
-echo "RPC URL: $RPC_URL"
-
 cd "$PROJECT_ROOT"
 # Load .env via dotenv (RPC CR/LF trim). Fallback: raw source.
 if [[ -f "$SCRIPT_DIR/../lib/deployment/dotenv.sh" ]]; then
@@ -37,6 +26,14 @@ elif [[ -n "${REPO_ROOT:-}" && -f "$REPO_ROOT/.env" ]]; then
   set +a
 fi
 
+RPC_URL="${RPC_URL:-${RPC_URL_138:-${CHAIN138_RPC_URL:-http://localhost:8545}}}"
+if ! require_private_key_env; then
+    exit 1
+fi
+
+echo "Deploying Multicall to ChainID 138..."
+echo "RPC URL: $RPC_URL"
+
 forge script script/DeployMulticall.s.sol \
     --rpc-url "$RPC_URL" \
     --broadcast \
@@ -44,4 +41,3 @@ forge script script/DeployMulticall.s.sol \
     --verify
 
 echo "Multicall deployment complete!"
-