# Rootstock *The Bitcoin DeFi Layer.* https://rootstock.io/ ## Powpeg https://rootstock.io/powpeg/ https://dev.rootstock.io/concepts/powpeg/ The bridge does not support unilateral exit. From the [docs page](https://dev.rootstock.io/concepts/powpeg/): >To perform peg-outs, the Bridge accepts requests from Rootstock accounts, and after thousands of confirmation blocks, the Bridge builds a Bitcoin peg-out transaction commanding the PowHSMs to sign this transaction. The Bridge selects the transaction inputs (or UTXOs) to include in the peg-out transactions, preventing selective censorship of UTXOs of any kind. The Bridge also coordinates and applies forced-delays to all treasury operations required when the PowPeg composition changes. Finally the Bridge serves as an Oracle to expose the Bitcoin blockchain to Rootstock smart-contracts. ==Rootstock peg-outs rely on the participation of the PowHSMs and collaboration of the majority of PowPeg members==, as the PowHSMs need to sign every peg-out transaction. Assuming the practical security provided by PowHSMs, PowPeg peg-outs are also trustless.