Preparing for gasless transactions

The v5 wallet smart contract allows the processing of internal messages signed by the owner.

This also allows you to make gasless transactions, e.g. payment of network fees when transferring USDt in USDt itself.

Flow:

1. When sending an USDt the user signs one message containing two outgoing USDt transfers:

1.1. USDt transfer to the recipient's address.

1.2. Transfer of a small amount of USDt in favor of the Service.

2. This signed message is sent offchain by HTTPS to the Service backend. The Service backend sends it to the TON blockchain paying Toncions for network fees.

The Tonkeeper team announced the launch of the beta version of such public backend on June 14. Backend will support the USDt and the NOT.

Although each wallet could launch its own backend, we believe that a single backend would be more convenient if there are network-wide subsidy campaigns. However, the final choice is up to you.

We invite TON wallets to support gasless transactions for USDt (and NOT) by June 20, by the time the v5 wallet smart contract is finalized.