Price Oracles
Nexus' oracle will provide fast, reliable, manipulation-resistant spot index prices for all perpetual markets on the Exchange.
Oracle prices are a foundational component of the NexusCore risk engine and will be used for:
Mark price calculation
Funding rate computation
Margin requirements
Liquidation triggers
Triggering TP/SL and conditional orders
Oracle updates will be published every ~3 seconds, ensuring accurate and timely tracking of global spot markets.
Design Overview
Nexus will use a validator-published, multi-source, volume-weighted oracle for spot pricing in the Exchange Alpha.
This design draws inspiration from validator-driven mechanisms but replaces stake-based weighting with market volume-based weighting, creating a more market-neutral and liquidity-reflective system.
Every validator will independently compute a spot oracle price for each supported asset using aggregated data from major centralized exchanges and, when appropriate, Nexus-native markets.
Validator Responsibilities
Each validator will continuously:
Fetch spot mid-prices for each asset from supported exchanges
Compute a volume-weighted median across these sources
Publish an updated oracle price roughly every 3 seconds
Sign and broadcast the price to other validators and the network
These prices are then aggregated into a final L1 oracle price consumed by NexusCore.
External Data Sources
Validators will query spot mid-prices from a diverse set of high-liquidity exchanges, including:
Binance
OKX
Bybit
Kraken
KuCoin
Gate.io
MEXC
Each source will contribute to the oracle calculation using a predefined volume-based weight, reflecting the global liquidity share of each venue for that asset.
Final Calculation
Validators gather spot mid-prices
Volume-based weights applied
Validators compute a weighted median and each broadcast to the network
NexusCore aggregates all validator submissions
NexusCore computes the final L1 oracle price as a volume-weighted median
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