Other Layer 2 Solutions

11 min readarticleIncludes quiz · 2 questions

While Lightning Network dominates Bitcoin's Layer 2, several other scaling solutions exist, each with different trade-offs and use cases.

Sidechains:

  • •Liquid Network: Federated sidechain with confidential transactions
  • •Rootstock (RSK): Smart contract sidechain with merge mining
  • •Elements: Open-source sidechain platform

State Channels (non-Lightning):

  • •Spilnter: Discreet log contracts for more complex state
  • •BOLT: Bi-directional Off-chain Lightning Transfer protocols
  • •Generic state channels: Custom implementations for specific needs

Trade-offs comparison:

  • •Lightning: Fast, cheap, Bitcoin-native, payment-focused
  • •Liquid: Higher security, privacy features, slower settlement
  • •RSK: Smart contracts, merge mining, bridging required
  • •Sidechains: More features, trusted federation, less decentralization

Future developments:

  • •Schnorr signatures: More efficient multisig and privacy
  • •Taproot: Better script privacy and efficiency
  • •OP_CAT: Enables more complex Lightning constructions
  • •Cross-chain protocols: Interoperability between solutions
Layer 2 Landscape
Layer 2 Landscape

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