Satoshi Stablecoin wallet

What is Satoshi Stablecoin (SATUSD)?

satUSD comes into existence through debt. Someone locks collateral in River's system and mints the stablecoin against it, the way a collateralized debt position works anywhere; the unusual part is that the collateral and the minted satUSD do not have to sit on the same chain. Collateral pledged in one ecosystem can back a satUSD issued in another, without the collateral itself being bridged across.

For whoever simply holds the token afterwards, the mechanics are quieter. satUSD is an ordinary ERC-20 on each chain where it is deployed, transferable to any address, with the dollar peg resting on the collateral backing the outstanding supply rather than on a bank account. Only the person who opened the position repays and unlocks; a secondary holder has nothing to maintain.

What does need attention is geography. The same ticker exists as a separate contract on each supported chain, and those balances are distinct. On EVM networks the destination address looks identical everywhere, so the address itself carries no information about which chain the recipient is watching, and confirming that before sending is the holder's job, not a wallet's.

Tangem lists each chain's satUSD separately instead of merging them into a single figure, and states the sending network on the screen you approve before the card signs, which at least puts the question in front of you at the moment it can still be answered. That visibility is the practical case for keeping a multi-chain stablecoin here.

Supported networks in Tangem (5): Base, Arbitrum One, Ethereum, BNB Smart Chain, X Layer.