flare-fdc

The Flare Data Connector (FDC) is a protocol enabling cross-chain attestations by verifying external data on-chain. It uses request flows and Merkle proofs to validate data from sources like EVMTransaction or Web2Json before smart contract integration.

To verify Web2Json attestations in a smart contract, you use the FDC's DA Layer and Merkle proofs. The process involves requesting the attestation, receiving the proof, and executing on-chain verification logic to safely validate the parsed Web2 data.

Yes, the Flare Data Connector supports multiple attestation types including XRPPayment, XRPPaymentNonexistence, AddressValidity, EVMTransaction, and Payment, enabling diverse cross-chain data verification and proof-of-reserves use cases for dApps.

Best practices for integrating FDC Merkle proofs involve using read-only reference patterns from Flare Developer Hub starter repos, ensuring proper DA Layer verification, and validating attestation types before executing smart contract logic to maintain safety.

Yes, the Flare Data Connector supports weather insurance and proof-of-reserves applications by leveraging Web2Json and Payment attestation types. It provides the necessary request flow and on-chain verification to securely process external data triggers.

The primary limitation is that FDC integration guidance is strictly read-only and does not execute transactions. Developers must reference Flare Developer Hub guides for attestation flows and contract interaction patterns without relying on automated state changes.