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IFdcRequestFeeConfigurations

Interface for managing FDC request fee configuration.

Sourced from IFdcRequestFeeConfigurations.sol on GitHub.

Overview​

The IFdcRequestFeeConfigurations interface provides functionality for managing and retrieving fees associated with attestation requests in the Flare Data Connector (FDC) system. It allows for querying the base fee required for specific attestation requests.

Functions​

getRequestFee​

Method to get the base fee for an attestation request. It reverts if the request is not supported.

function getRequestFee(
    bytes _data
) external view returns (
    uint256
);

Parameters

  • _data: ABI encoded attestation request

Returns

  • uint256: The base fee required for the specified attestation request

Events​

TypeAndSourceFeeRemoved​

Emitted when a fee configuration for a specific attestation type and source is removed.

event TypeAndSourceFeeRemoved(
    bytes32 attestationType,
    bytes32 source
)

Parameters

  • attestationType: The type of attestation
  • source: The source identifier

TypeAndSourceFeeSet​

Emitted when a fee configuration for a specific attestation type and source is set.

event TypeAndSourceFeeSet(
    bytes32 attestationType,
    bytes32 source,
    uint256 fee
)

Parameters

  • attestationType: The type of attestation
  • source: The source identifier
  • fee: The fee amount set for the attestation type and source

Usage Example​

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@flare-foundation/flare-smart-contracts-v2/contracts/userInterfaces/IFdcHub.sol";
import "@flare-foundation/flare-smart-contracts-v2/contracts/userInterfaces/IFdcRequestFeeConfigurations.sol";

contract FeeChecker {
    IFdcHub private fdcHub;
    IFdcRequestFeeConfigurations private feeConfigs;

    constructor(address _fdcHubAddress) {
        fdcHub = IFdcHub(_fdcHubAddress);
        feeConfigs = fdcHub.fdcRequestFeeConfigurations();
    }

    function checkRequestFee(bytes memory attestationData) external view returns (uint256) {
        // Get the fee required for this attestation request
        return feeConfigs.getRequestFee(attestationData);
    }

    function submitRequestWithFee(bytes memory attestationData) external payable {
        // Check if enough fee is provided
        uint256 requiredFee = feeConfigs.getRequestFee(attestationData);
        require(msg.value >= requiredFee, "Insufficient fee");

        // Submit the attestation request
        fdcHub.requestAttestation{value: msg.value}(attestationData);
    }
}