ignore .env_dev file. add validation to not link solana twice.

Author: RustNinja

.gitignore

@@ -4,3 +4,5 @@ target/
 cli/.env_prod
 
 solana/staking/script/.env_dev
+
+cli/.env_dev

vesting-backend/src/main.rs

@@ -130,6 +130,20 @@ pub async fn submit_signature(
         return HttpResponse::Ok().body(serde_json::to_string(&ret).unwrap());
     }
 
+    let dropped_entity = dropped_data.iter().find(|x| x.solana_address == post_params.message);
+    if dropped_entity.is_some() && (dropped_entity.unwrap().success || dropped_entity.unwrap().signature.is_some() ){
+        let error = format!("This solana wallet already linked to this address: {}. Please use another solana wallet", dropped_entity.unwrap().address);
+        println!("{}", error.clone());
+        let ret = VestingResp {
+            is_success: false,
+            error_message: Some(error),
+            page_index: Some(1),
+            amount_locked: amount_locked,
+            amount_unlocked: amount_unlocked,
+        };
+        return HttpResponse::Ok().body(serde_json::to_string(&ret).unwrap());
+    }
+
     if post_params.network == 0 {
         let address_str: H160 = post_params.pubkey.parse().unwrap();
         let signed_message = get_signed_message(post_params.message.clone());