Build on Bitcoin (BOB)

Scale your DApp to Polkadot with Acala, an Ethereum-compatible smart contract platform optimized for DeFi. Acala is the decentralized finance network and liquidity hub of Polkadot. It’s a layer-1 smart contract platform that’s scalable, Ethereum-compatible, and optimized for DeFi with built-in liquidity and ready-made financial applications. With its trustless exchange, decentralized stablecoin (aUSD), DOT Liquid Staking (LDOT), and EVM+, Acala lets developers access the best of Ethereum and the full power of substrate. Access DOT-based assets and derivatives, Polkadot-native decentralized stablecoin, Polkadot ecosystem assets, and cross-chain assets from Bitcoin, Ethereum and beyond. Acala’s chain is customized for DeFi and can continue to upgrade without forks to integrate new features requested from developers. For example, on-chain ‘keepers’ automate protocol execution to better manage risks and improve user experience, or transaction fees payable with virtually any token.

BitcoinOS (BOS) is a modular, open source smart contract platform designed to bring scalable, interoperable, and programmable functionality to Bitcoin without altering its base layer. Utilizing zero-knowledge (ZK) proofs through its BitSNARK protocol, BOS enables the execution of smart contracts directly on Bitcoin's mainnet, facilitating decentralized applications (dApps), decentralized finance (DeFi), and trustless cross-chain interactions. BitcoinOS' architecture comprises three layers: the Bitcoin Core base layer, an execution layer that aggregates and compresses transactions, and a compute layer consisting of interoperable rollups called Execution Environment Modules (EEMs). These EEMs support various virtual machines, including Ethereum Virtual Machine (EVM) and Rust-based environments, allowing developers to build applications in multiple programming languages.