Reference → dAPIs → Understanding dAPIs

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Sponsor wallets

Funds from sponsor wallets are used to pay the gas cost when updating the on-chain value of dAPIs' sourced beacon value.

When a user purchases a dAPI configuration from the API3 Market, the funds are transferred to the sponsor wallet of the dAPI. The sponsor wallet is used to pay for the gas costs of updating the beacon value of the dAPI. The user can then deploy a proxy contract to read the value of the dAPI.

dApp access:

A dApp uses a proxy contract address to read() the value of the dAPI. The dAPI is defined, and its value retrieved, by the Api3ServerV1.sol contract.

Data feed updates:

Airnode monitors the value of an API provider's API endpoint based on its updateInterval parameter. If the on-chain value deviates from the API provider value, the dAPI's beacon is updated on-chain.

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