A bridge between the Bitcoin blockchain & Ethereum smart contracts


BTC Relay has launched is live on mainnet!

Mainnet BTC Relay

After joining the Ethereum Bounty Program, BTC Relay has given out over 5 BTC.

BTC Relay is a building block that allows Ethereum contracts to securely verify Bitcoin transactions without any intermediaries: in short users can pay with Bitcoin to use Ethereum.


Open Source

Participate in Github. Questions? See the FAQ and ask in the Gitter.


Anyone can be a Relayer: no heavy hardware or electricity costs like Bitcoin mining. No special privileges for any entity.

Easy to Use

For developers, BTC Relay is easy to integrate in an Ethereum application or smart contract.

Developed by