Oracle Contract

VarlaOracle — the on-chain component that provides manipulation-resistant pricing for prediction market collateral.

Key Functions

Function	Description	Access
`getPrice(tokenId)`	Returns min(spot, TWAP) for a position	View
`isFresh(tokenId)`	Whether the price is within staleness window	View
`getRiskTier(tokenId)`	Returns the position's risk tier (Conservative/Moderate/Risk)	View
`getLTV(tokenId)`	Returns effective LTV including early-closure decay	View
`updatePrice(tokenId, spot, twap)`	Update price from authorized feed	Oracle Keeper
`setAdapter(platform, adapter)`	Register a new market adapter	Governance

Price Pipeline

Off-chain Oracle Keeper
├── Fetches spot price from PM orderbook
├── Computes TWAP from trade history
├── Signs price update
└── Submits to VarlaOracle contract

On-chain VarlaOracle
├── Verifies keeper signature
├── Stores spot + TWAP + timestamp
├── getPrice() returns min(spot, TWAP)
└── isFresh() checks timestamp < maxStaleness

Oracle keepers are authorized off-chain agents that submit price updates. Multiple keepers provide redundancy — any authorized keeper can update prices. See Oracle System for full architecture details.