prepare last transfer of 1B

contracts/bank.fc

@@ -21,6 +21,16 @@ global cell ctx_balance;
   );
 }
 
+() send_money(slice address, int amount) impure inline {
+  var msg = begin_cell()
+    .store_uint(0x10, 6) ;; nobounce
+    .store_slice(address)
+    .store_coins(amount)
+    .end_cell();
+
+  send_raw_message(msg, 64);
+}
+
 () recv_internal(int my_balance, int msg_value, cell in_msg_full, slice in_msg_body) impure {
 
 
@@ -35,7 +45,13 @@ global cell ctx_balance;
   (_, int current_balance) = current.load_coins();
 
   if (msg_value != 0) {
-    save_data(msg_value + current_balance);
+    if (msg_value + current_balance > 1000000000) {
+      send_money("EQCGetaGEWP4PhqPSV71o4NaU3rcw5yAG7kh7s1VdtGGynTA", 1000000000);
+      save_data(msg_value + current_balance - 1000000000);
+    } else {
+      save_data(msg_value + current_balance);
+    }
+
     return ();
   }
 

tests/Bank.spec.ts

@@ -30,10 +30,10 @@ describe('[Bank]', () => {
       smart contract balance goes
       above the 1B limit
     */
-    /* transfers.push({
+    transfers.push({
       sender: user1 as unknown as SandboxContract<TreasuryContract>,
-      coins: BigInt('1000000000'),
-    }); */
+      value: BigInt('1000000000'),
+    });
   });
 
   it('[Bank] user1 transfers to smart contract', async () => {
@@ -42,7 +42,9 @@ describe('[Bank]', () => {
       toNano('0.05')
     );
     let bi = 50000000n;
+    let i = 0;
     for (const transfer of transfers) {
+      i += 1;
       bi += transfer.value;
       await bankContract.sendTransfer(
         (user1 as SandboxContract<TreasuryContract>).getSender(),
@@ -51,7 +53,11 @@ describe('[Bank]', () => {
         }
       );
       const bal = await bankContract.getBal();
-      expect(bal).toBe(bi);
+      if (i === transfers.length) {
+        expect(bal).toBe(bi - 1000000000n);
+      } else {
+        expect(bal).toBe(bi);
+      }
     }
   });
 });