Plain-language glossary
Oracle: A system that provides data for applications to use. Mimir focuses on price data derived from onchain liquidity.
Feed: One price that Mimir keeps, for example SOL in USDC. Mimir calculates it from the pools where the token is traded, and apps read it by its short name (its ticker).
Source Feed: A reference for one asset pair, derived from its configured liquidity sources.
Composite Feed: A reference formed by adding component prices multiplied by chosen quantities.
Base / quote: In MRVL/USDC, MRVL is the asset being priced and USDC is the unit used to express its price.
Mint: The Solana address identifying a token. Different tokens can use the same displayed ticker.
Feed ticker: A short, unique identifier for a Mimir feed, useful for recognizing it in the Mimir app. Source and Composite Feeds share this namespace. A feed ticker is separate from an underlying token's symbol. Choose a ticker.
Pool: Onchain liquidity used for trading assets; a possible input to a Source Feed.
Adapter: Code that understands and validates a particular pool format.
API: The free, keyless HTTP reads at https://api.mimirfeeds.io. See API.
Refresh: An onchain operation that calculates and records updated feed data. An application can refresh a feed and consume its price in the same transaction. A simple RPC read only retrieves stored data.
Shadow: Mimir's off-chain run of the same price computation, from the accounts the indexer reads. It sends no transaction and changes no stored price. See provenance.
Simulation: What a refresh would record now, simulated without sending it.
Source: In an API answer, where the price comes from: shadow (computed just now from the pools, not saved on chain), storage (the last price saved on chain) or recorded (history).
Storage: The price stored on chain by a feed's last refresh.
Snapshot: A stored observation and the metadata needed to interpret its state and validity.
Slot: A unit in Solana's progress. Protocol validity windows can be expressed in slots rather than wall-clock seconds.
TWAP: Time-weighted average price: a price measure across a period, rather than just one point. Availability and requirements depend on the feed and consumer.
Lamport: The smallest unit of SOL. One SOL is one billion lamports.
Ticker fee: The $COLA a feed's creation burns, set by the length of its ticker.
Activation fee: The SOL a new composite pays the owners of its component feeds and the protocol treasury.
Refresh fee: The SOL a Composite Feed refresh pays when it records a new price: one share goes to the composite's fee vault and the rest to the protocol treasury. A Source Feed refresh carries no refresh fee.
Fee vault: The part of a composite's account that holds its owner's share of refresh fees until the owner claims it.
RWA / tokenized equity: A token linked to an offchain asset or instrument. Its issuer's terms determine its rights; the name alone does not.
Perpetual market: A derivatives market without a fixed expiry. Its oracle input is one part of a larger trading and risk system.