Basic Attention wallet

What is Basic Attention (BAT)?

BAT is the token of the Brave browser's advertising system, where advertisers pay in BAT and the browser distributes it to publishers and to users who opted into privacy-preserving ads, with the matching of ads done locally on the device rather than through outside tracking. It was one of the earliest large ERC-20 tokens and its home is still the Ethereum contract.

For a holder the practical issue is that BAT exists in more than one place, and the copies are not interchangeable. A BAT balance held inside Brave's own rewards system is an internal ledger entry; it becomes an ordinary on-chain token only once it is withdrawn to an address you control. And beyond Ethereum there are bridged representations issued on other chains. They trade under the same ticker but they are separate contracts, and moving between them needs a bridge, not a plain transfer.

The Solana version behaves differently from the rest: there BAT sits in a token account tied to your wallet, and a small amount of SOL is needed to open it before any BAT can arrive. On the EVM chains the fee is paid in that chain's own coin - ETH, BNB, POL, AVAX - never in BAT.

Supported networks in Tangem (5): Ethereum, BNB Smart Chain, Solana, Avalanche, Polygon POS.

Because of that spread, Tangem keeps each chain's BAT as its own line with its own balance, and a transfer screen names the network it will leave on before the card is tapped to sign. An EVM address is identical everywhere, so that last look is yours to take - and having it spelled out is the reason a multi-chain token like BAT sits comfortably here.