Built on Bitcoin's Ledger Model
Sundial leverages a UTXO architecture to deliver institutional-grade security, deterministic execution, and fraud-proof protection for Bitcoin yield
Sundial × Charms
BTC-backed reserve assets. FIRE and ICE - a senior/junior split of a shared Bitcoin vault - built natively on Bitcoin with the Charms protocol.
FIRE (BTC+)
The junior reserve-growth asset. Captures residual BTC upside after ICE liabilities are met.
ICE (BTC−)
The senior BTC-backed claim. Lower volatility, USD-denominated, with formulaic reserve-funded growth.
ZK Security
Alchemy's ZK proofs ensure holders can always verify their claim on the shared BTC vault.
Bitcoin Yield Testnet
Dawn Marketplace
Explore Sundial's newly released testnet and see how Bitcoin-native yield can feel when the full flow stays rooted in Bitcoin infrastructure.
Live preview of the Bitcoin yield experience
Need L2 testnet sBTC? Use the faucet.
Built on Bitcoin
Our novel BTC lockers are built entirely on Bitcoin for native, chain-level security.
Keep Assets On-Chain
Send assets directly to our Bitcoin smart contracts without leaving the Bitcoin environment.
Native Rewards
Yield and original assets are returned in BTC, preserving a clean Bitcoin-native experience.
BTC Yield Vault
Solstice
Solstice is our next Bitcoin-native vault experience: BTC in, receipt tokens out, with yield expressed through a rising claim ratio over time.
Launch details will be announced soon
Claim Ratio Engine
A system-wide BTC-per-RT ratio prices investment and redemption from a single source of truth.
Bitcoin-Native Settlement
Atomic BTC-in and RT-out settlement keeps pricing and execution aligned to the same transaction.
Reserve-First Controls
Operational reserve checks and proof-of-reserves gating are designed to protect backing integrity.
Layer 2 Architecture
A multi-layer approach to scaling Bitcoin while maintaining Layer 1 security guarantees
Bitcoin Layer 1
Native Bitcoin blockchain providing ultimate security and finality. Assets never leave user custody.
Bridge Infrastructure
Trustless ZK-powered bridges enabling seamless asset movement between Bitcoin and Sundial without custodial risk.
Sundial Layer 2
Optimistic rollup with fraud proofs, processing thousands of transactions per second with Bitcoin-level security.
Application Layer
DeFi protocols, institutional services, and SDK integrations built on Sundial's secure infrastructure.
Stay Updated
Subscribe to Sundial mailing lists