Exchange

Alice wants to swap WTON for USDT in the USDT/WTON pool. Alice sends USDT to the Router, and in return, the Router sends WTON to Alice.

1. Alice's Wallet sends a transfer message to Alice's USDT Wallet.

   1. The Router is the recipient, and the message contains swap details such as the pool used and minimum amount.

2. An internal_transfer message is sent from Alice's USDT Wallet to the Router's USDT Wallet.

3. A transfer_notification message is sent from the Router's USDT Wallet to the Router.

4. An exchange message is sent from the Router to the Pool.

5. The Pool contract sends a pay_to message to the Router.

   1. This message includes the type and amount of coins that should be sent to Alice.

   2. If Alice's WTON amount is less than the minimum, a message is generated to send USDT back to her.

6. The Router contract sends a transfer message to the Router's WTON Wallet.

7. A transfer message is sent from the Router's Wallet to Alice's Wallet.

   1. Alice receives WTON.