add help message and ability to use blockscout as verifier

Signed-off-by: Uncle Fatso <uncle.fatso@ghostchain.io>

deployer.sh

@@ -6,6 +6,20 @@ START=1
 END=4
 VERIFY_NEEDED="--verify"
 
+usage() {
+    echo "Correct deployer script usage:"
+    echo -e "\t-s, --start - from which contract deployment should start."
+    echo -e "\t-e, --end - last contract deployment to be done."
+    echo -e "\t-n, --network - network name to be deployed on."
+    echo -e "\t-b, --blockscout - should try to use blockscout as verifier."
+    echo -e "\nAvailable network names: ${AVAILIABLE_NETWORKS[@]}"
+    echo -e "\nContract enumeration:"
+    echo "0) WETH9"
+    echo "1) UniswapV2Factory"
+    echo "2) UniswapV2Router"
+    exit 1
+}
+
 while [[ $# -gt 0 ]];
 do
     case "${1}" in
@@ -24,6 +38,17 @@ do
         shift
         shift
         ;;
+        -b|--blockscout)
+        VERIFY_NEEDED+=" --verifier blockscout"
+        shift
+        ;;
+        -h|--help)
+        usage
+        ;;
+        *)
+        echo -e "\nERROR: Unknown option provided\n"
+        usage
+        ;;
     esac
 done