You can bridge from any blockchain to the TON Network.
Choose the Crypto (SOL, ETH, BTC) that you wish to Swap in exchange to receive TON.
COPY YOUR TONKEEPER WALLET RECEIVING ADDRESS, and paste it in the section that says "Recipient Wallet".
CLICK Next
After clicking the Next Button, this screen will show you what address your TON will be delivered to and how much you are expected to receive for the Crypto your swapping for the TON.
CLICK Exchange
After clicking the Exchange Button, this screen gives you the amount of crypto (SOL) to send and the address to send the crypto (SOL) that you are using to swap for TON.
Meaning: If you are using SOL to swap for some TON, then the Phantom or Solflare Wallet where you have your SOL stored will be the place from where you will send the (exact amount they state) of SOL to the address give to you.
IT'S VERY IMPORTANT THAT YOU PAY CLOSE ATTENTION TO YOUR EVERY MOVE WHEN MANEUVERING IN CRYPTO, TRY TO BE RIGHT AND EXACT TO BEST OF YOUR ABILITY.