Cowrie Research

compound-open-price-feed

3 min read

Compound Open Price Feed

  • Name: Compound Open Price Feed
  • URL: https://github.com/compound-finance/open-oracle
  • Category: signed-data oracle / reporter-poster split / anchored price-feed middleware
  • Tags: ethereum-ecosystem
  • Summary: Compound Open Price Feed is not just Compound’s oracle. It is a clean lower-layer split between who signs market data, who pays to publish it onchain, and which contract logic decides whether that data should count. The useful part is the architecture: signed reporters, permissionless posters, and a guarded view layer that can fall back to anchor pricing when the reporter path stops looking trustworthy.
  • What it does:
    • Lets reporters sign structured price messages offchain using a known public key, without requiring the reporter itself to pay gas
    • Lets any poster submit those signed messages onchain to authenticated storage, removing the need for a single permissioned posting role
    • Stores the latest signed value per source and key in OpenOraclePriceData, which downstream view contracts can read directly or aggregate
    • Ships view-layer contracts such as UniswapAnchoredView that compare a reporter price against an onchain Uniswap TWAP anchor before updating the authoritative price
    • Supports a reporter invalidation path where the reporter can signal compromise and force the system to fall back to anchor pricing until governance selects a new feed arrangement
    • Was explicitly proposed as a governance-era decentralization step for Compound, with room to add more reporters and more aggregation logic over time
  • Key claims:
    • The repository README says Open Oracle is a standard and SDK for reporters to sign key-value pairs and for clients to build shared aggregates such as a median from several sources.
    • Compound’s governance posts framed the migration as a decentralization milestone because anyone can post signed prices onchain, eliminating dependence on a single permissioned poster run by Compound Labs.
    • The migration design is analytically useful because it keeps three roles separate: reporters produce signed prices, posters transmit them onchain, and view contracts decide what counts as the protocol-facing price.
    • The OpenOraclePriceData contract exposes the underlying authenticated-data layer clearly: it stores the freshest source-signed (key, value, timestamp) record and rejects stale or implausibly future-dated writes.
    • The UniswapAnchoredView contract exposes a second, distinct policy layer: reporter prices are accepted only if they remain within configured upper and lower anchor ratios around a Uniswap TWAP, otherwise they are guarded rather than stored.
    • The reporter invalidation mechanism is an especially important control surface. The governance docs describe a signed invalidation message that flips the system into anchor-only mode if the reporter key may be compromised.
    • Open Price Feed belongs in the active corpus because it gives a clean baseline for comparing signed-source oracles, protocol-owned price views, fallback design, and the difference between data authorship and transaction submission.
  • Whitepaper: No standalone whitepaper surfaced in this pass. The strongest primary materials were the repository README, core contracts, and Compound governance threads collected in ../whitepapers/compound-open-price-feed-primary-sources-2026-05-13.md.
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