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IWeb2Json (deprecated)

Deprecated

The Web2Json attestation type is deprecated and this page is no longer maintained. To bring Web2 data onchain, build a Flare Confidential Compute (FCC) extension instead. The Weather Insurance Extension guide shows an extension that fetches data from a Web2 API.

The Web2Json attestation type fetches data from a URL, post-processes the returned JSON with a jq filter, and returns the result as ABI-encoded bytes. The interface only declares the request/response/proof structs — verification is exposed via IFdcVerification.verifyWeb2Json.

Sourced from IWeb2Json.sol on GitHub.

Structs​

Request​

Top-level request.

struct Request {
    bytes32 attestationType;
    bytes32 sourceId;
    bytes32 messageIntegrityCode;
    RequestBody requestBody;
}

Response​

Top-level response.

struct Response {
    bytes32 attestationType;
    bytes32 sourceId;
    uint64 votingRound;
    uint64 lowestUsedTimestamp;
    RequestBody requestBody;
    ResponseBody responseBody;
}

Proof​

Top-level proof.

struct Proof {
    bytes32[] merkleProof;
    Response data;
}

RequestBody​

struct RequestBody {
    string url;
    string httpMethod;   // "GET" | "POST" | "PUT" | "PATCH" | "DELETE"
    string headers;      // "{}" if none
    string queryParams;  // "{}" if none
    string body;         // "{}" if none
    string postProcessJq;
    string abiSignature;
}

ResponseBody​

struct ResponseBody {
    bytes abiEncodedData;
}

Decode abiEncodedData into the struct described by your abiSignature to consume the post-processed payload on-chain.