Introduction

rexBTC is self-custodied native BTC on the Blast chain, allowing Bitcoin holders to participate in Blast's DeFi protocols while retaining full ownership of their assets. In the future, rexBTC will also expand to other L2 and Ethereum mainnets. rexBTC utilizes Discreet Log Contracts (DLCs) to lock Bitcoin in a 2-of-2 multisig UTXO, where one key is held by the user and the other key is distributed across a decentralized network.