In the Telegram for macOS 12.10.283234 beta, the built-in wallet address is no longer an anonymous string. When sending Gram to a user, the client displays the recipient's address and allows it to be copied. An address sent in a chat is now labeled with the account name: "This TON blockchain address is linked to @monk on Telegram."

Gram sending screen, actions menu for an address, and a label indicating the address-account link
Left: sending screen with recipient's address; Right: menu over an address in a chat and a label indicating its account ownership.

Tapping on such an address opens a menu with three actions: view in explorer, send Gram or TON, and copy address.

The client itself, not the blockchain, knows the link between the address and the name. Since the wallet is built-in, Telegram knows its owner even without on-chain verification. Both sides follow from that: a transfer can go by username without checking the address string, and a built-in wallet address in a chat points straight at an account.

A week ago, the wallet reached the macOS beta, where it displayed the balance but did not send transactions. The same discovery is confirmed by datamining channels.