bitcoin-l2-rootstock-rsk
Rootstock (RSK): EVM-compatible Bitcoin sidechain with merge mining and federation peg. RBTC native token, 30-second blocks, Solidity smart contracts. USE WHEN: building Bitcoin DeFi via EVM contracts, integrating RSK peg, comparing with Stacks / Liquid.
What this skill does
# Rootstock (RSK) RSK is a Bitcoin sidechain with **EVM compatibility**, secured by merge mining + a federation peg. Launched 2018 by IOV Labs / RSK Labs. ## Architecture - **Federation**: Powpeg n-of-m multisig holds bridged BTC. - **Merge mining**: Bitcoin miners can simultaneously mine RSK blocks for additional reward (no extra hashpower needed). - **EVM**: full Solidity smart contract support. - **30-second blocks** (vs Bitcoin's 10 min). - **Native token**: RBTC = 1:1 BTC-pegged. ## Peg architecture (Powpeg) Federation members hold: - Bitcoin multisig keys. - HSM (Hardware Security Module) attestation hardware. - Special PowPeg software signing peg-out only when proof-of-work threshold is met. Peg-out (RBTC → BTC): 1. User sends RBTC to special bridge address on RSK. 2. Federation observes, schedules release. 3. After ~100 RSK blocks (~50 min), federation's HSMs sign release. 4. BTC sent to user's destination on Bitcoin. ## RIF (RSK Infrastructure Framework) Companion ecosystem: - **RIF Storage** — IPFS-like. - **RIF Communications** — secure messaging. - **RIF Naming** — domain names on RSK. - **RIF Marketplace**. Powered by RIF token (separate from RBTC). ## Major projects - **Sovryn** — DEX, lending, derivatives on RSK. - **MoneyOnChain** — stablecoin (DoC, BPRO). - **Beexo** — wallet. - **RIF Wallet**. ## Comparison | Aspect | RSK | Stacks | Liquid | |--------|-----|--------|--------| | Smart contracts | EVM (Solidity) | Clarity | Limited | | Block time | 30s | ~Bitcoin (10 min before Nakamoto) | 2 min | | Peg | Federation + merge mining | sBTC threshold | Federation | | Maturity | 2018, mature | 2021, Nakamoto 2024 | 2018, mature | ## Use cases - **Bitcoin DeFi** with familiar Ethereum tooling. - **Stable coins** (DoC, USDS). - **Cross-chain bridges** to Ethereum/BSC via Sovryn. ## Implementations - **rskj** — Java reference node. - **Web3 client compat** — most Ethereum tools work (web3.js, ethers.js). - **MetaMask compatible** with custom RPC. ## Limitations - **Federation trust** for peg. - **Merge mining** depends on Bitcoin miners' participation. - **Solidity vulnerabilities** inherited from EVM. ## See also - [stacks/SKILL.md](../stacks/SKILL.md) - [botanix/SKILL.md](../botanix/SKILL.md) - [bsquared/SKILL.md](../bsquared/SKILL.md) - [bitlayer/SKILL.md](../bitlayer/SKILL.md)
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