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contracts/aerx_profile_nft/src/charge.rs

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+//this is a contract I formed from a venmo clone I found online.
+//for front-end this should be linked up to the charge button and open a prompt window.
+use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize};
+use near_sdk::collections::{LookupMap};
+use near_sdk::{env, setup_alloc, near_bindgen, AccountId, Promise};
+
+setup_alloc!();
+
+
+#[near_bindgen]
+#[derive(BorshDeserialize, BorshSerialize)]
+pub struct Charge{
+    memo: LookupMap<String, Vec<String>>
+}
+//giving us our default value or balance to fallback on
+impl Default for Charge {
+    fn default() -> Self {
+        Self{
+            memo: LookupMap::new(b"memo".to_vec())
+        }
+    }
+} 
+
+#[near_bindgen]
+impl Charge{
+    ///adding memo and price functionallity 
+    pub fn add_memo(&mut self, memo_text: String, price:String){
+
+        let account_id=env::signer_account_id();
+        let contains_user=self.memo.contains_key(&account_id);
+
+        if contains_user{
+            let mut temp_list=match self.memo.get(&account_id){
+                Some(x)=>x,   // x is vector of memos
+                None=>vec![] //else this will return an empty vector
+            };
+
+            temp_list.push(memo_text + " || " + &price + "Aerx");
+            self.memo.insert(&account_id, &temp_list);
+
+            }else{
+                let fresh_vec=vec![memo_text + " || " + &price+ "Aerx"];
+                self.memo.insert(&account_id, &fresh_vec);
+            }
+    }
+    //transfer function
+    pub fn transfer_money(&mut self, account_id: AccountId, amount:f64){
+        Promise::new(account_id).transfer(amount as u128);
+    }
+
+    //View Methods 
+    pub fn get_memos(self, user:String) -> Vec<String>{
+        match self.memo.get(&user){
+            Some(x)=>x, // vector that contains all memos
+            None=>vec![] //else this will return an empty vector
+        }
+    }
+}
+