BridgeRadar
Messaging protocol

Rosen Bridge

Rosen Bridge connects Ergo with Cardano, Bitcoin, Ethereum, BNB Chain and Dogecoin. It is one of the few working for Bitcoin and Dogecoin to Cardano, but it is still labelled beta.

Official website

How it works

  1. 1You lock coins on the source network in a Rosen address and say where they should arrive.
  2. 2Watchers, independent operators for each network, report the deposit on Ergo. Ergo acts as the record keeper for every transfer.
  3. 3Once enough Watchers agree, a fixed group called Guards signs a release on the destination network. You receive a wrapped version of the coin, for example rsBTC on Cardano.

Trust model

You trust the Guards. They hold the or threshold keys on every connected network, and a set majority of them must sign each release. Watchers can be penalised for false reports, but the final signature still comes from the Guard set.

Strengths

  • Connects networks without , such as Bitcoin and Dogecoin, with Cardano and chains.
  • Every transfer is recorded on Ergo, so it can be checked afterwards.
  • Anyone can become a Watcher by staking RSN and ERG.

Limitations

  • Still in beta, with modest for the it issues.
  • You usually receive a wrapped token (such as rsBTC), not the original coin.
  • The Guard set is small and fixed, so the bridge depends on a few operators.