In Symbiotic Finance, instead of relying on traditional on-chain price oracles which can be susceptible to manipulation (like flash loan attacks), the protocol uses a decentralized, human-powered system.
Resolvers are the core of this system.
Their main job is to monitor the price of collateral assets (like ETH or other tokens) from various external sources (e.g., centralized exchanges, decentralized exchanges, APIs). When the protocol requires a price for instance, to determine if a loan is undercollateralized and needs liquidation it requests this information. Resolvers then submit their observed price to the protocol.
Key functions include:
Price Proposal: Submitting price data for collateral assets.
Liquidation Initiation: Based on the prices they provide, resolvers can trigger the liquidation of undercollateralized vaults.
System Integrity: Acting as a decentralized check to ensure asset prices are accurate and not manipulated.
How the Resolver System Works
The process is designed to be economically secure and resistant to bad actors.
Staking: To become a resolver, a user must stake Symbiotic's native token (SYM). This stake acts as a security deposit or collateral. It ensures that resolvers have a financial incentive to act honestly.
Price Requests: The protocol requests a price for an asset. Multiple resolvers submit their proposed prices.
Price Agreement: The protocol uses a mechanism to determine the accepted price from the various submissions, often by taking a median or other aggregated value.
Dispute and Verification: If a submitted price is challenged, it can go through a dispute resolution process. In Symbiotic, this is ultimately settled by a vote from SYM token holders, acting as a final backstop.
Incentives and Penalties
The system relies on a carrot-and-stick approach to ensure resolvers provide accurate data.
Rewards (The Carrot): Honest and active resolvers are rewarded for their services. When they successfully provide accurate price data that is used for a liquidation, they receive a portion of the liquidation penalty fee paid by the vault owner.
Slashing (The Stick): If a resolver submits a malicious or grossly inaccurate price and is successfully challenged, a portion of their staked SYM tokens is slashed (confiscated). This penalty makes dishonest behavior economically unviable.
Conclusion
Resolvers are the decentralized, human-powered oracles of the Symbiotic ecosystem. They replace automated price feeds with a system of staked actors who are financially motivated to ensure the protocol receives accurate, real-world asset prices, thereby securing user funds and maintaining platform stability.