cirBTC to Bitcoin in one step

Questions

What is cirBTC?

cirBTC (Circle Wrapped Bitcoin) is an ERC-20 token backed 1:1 by bitcoin and issued by Circle. It lets bitcoin be used on Ethereum. This site is an independent service by Satora and is not affiliated with Circle.

How does a swap work?

It is an atomic swap. Going from cirBTC to BTC, your cirBTC is converted to tBTC, another bitcoin-backed token, and locked in a hash time-locked contract on Ethereum. We lock or pay the matching bitcoin, and claiming the bitcoin is what releases the locked tBTC to us. BTC to cirBTC is the same in reverse. Either both sides complete or neither does, so nobody holds your funds in between.

What rate do I get?

Close to 1 cirBTC for 1 BTC, minus the protocol fee and the network fee shown in the quote. cirBTC is traded for tBTC on a decentralized exchange as part of the swap, so the rate moves slightly with that market. The card shows the live rate before you commit.

What happens if a swap fails?

Your funds come back to you. A cirBTC to BTC swap refunds tBTC on Ethereum, not cirBTC, because the conversion to tBTC happens before the funds are locked. A BTC to cirBTC swap returns your bitcoin: a Lightning payment that cannot complete goes back to your wallet, and on-chain and Arkade deposits are refunded to you after the timelock expires.

Are there limits?

Yes, and the swap card shows the current minimum and maximum with every quote. Lightning and Arkade payouts suit the smaller amounts; on-chain swaps carry the Bitcoin network fee.

Do I need an account?

No. There is no sign-up and no KYC. You need a wallet holding cirBTC on Ethereum, plus some ETH for gas, to send cirBTC, or any Bitcoin, Lightning or Arkade wallet to send bitcoin.