Oracles

Lombard uses oracle infrastructure to provide transparent, independently verifiable data about protocol reserves and asset pricing. Oracle feeds are critical for ensuring LBTC and BTC.b remain fully backed and accurately priced across DeFi integrations.

Protocol Proof of Reserves

Lombard’s Proof of Reserve (PoR) system provides on-chain verification that every LBTC and BTC.b token in circulation is fully backed by native Bitcoin. The system operates independently of Lombard, giving users and integrators a trustless way to confirm backing at any time.

How It Works

Base Address List

The Bitcoin addresses holding protocol reserves are published and can be independently monitored by anyone using a Bitcoin block explorer. The full list of base addresses is available through the Lombard Proof of Reserves page.

LBTC Fundamental Price

The LBTC fundamental price represents the fair value of LBTC based on the underlying staked BTC and accumulated yield. This price is derived from the LBTC/BTC exchange rate, which increases over time as staking rewards accrue. The fundamental price feed enables DeFi protocols to accurately value LBTC positions for lending, liquidation, and collateral calculations.

Price Feed Oracles

Price feed oracles provide real-time LBTC and BTC.b pricing data to DeFi protocols across supported chains. These feeds are essential for:

• Lending markets — Accurate collateral valuation and liquidation thresholds
• DEX pricing — Fair exchange rates for trading pairs
• Vault strategies — Correct position sizing and rebalancing triggers
• Derivatives — Mark-to-market pricing for structured products

Why Price Feeds Matter

Without accurate and timely price data, DeFi protocols cannot safely integrate LBTC and BTC.b. Stale or inaccurate price feeds could lead to incorrect liquidations, mispriced trades, or exploitable arbitrage. Lombard’s oracle infrastructure ensures that price data is updated frequently, sourced from multiple providers, and verifiable on-chain.

Proof of Reserve Contract Addresses

Base Address List Contract

The Bitcoin addresses holding protocol reserves are also published on-chain through a dedicated Base Address List contract:

Price Feed Oracle Addresses

External Resources

• Chainlink Proof of Reserve  — Independent PoR verification
• Lombard Proof of Reserves  — Protocol reserve dashboard
• Dune Analytics — Lombard  — Community-built analytics dashboards

For Integrators

If you are integrating LBTC or BTC.b into a DeFi protocol and need oracle price feeds:

1. Check that a price feed is available on your target chain from the tables above
2. Use the Proof of Reserve contract to verify backing before accepting LBTC or BTC.b as collateral
3. Implement the LBTC fundamental price feed for accurate yield-adjusted valuation
4. Contact the Lombard team for custom integration support or feeds on additional chains

Next Steps

• Smart Contracts — Full list of deployed contracts across all networks
• Bridging Architecture — How cross-chain oracle data is propagated
• Security Model — How oracles fit into Lombard’s defense-in-depth architecture