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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​

FeeChecker.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.25;

import {ContractRegistry} from "@flarenetwork/flare-periphery-contracts/coston2/ContractRegistry.sol";
import {IFdcHub} from "@flarenetwork/flare-periphery-contracts/coston2/IFdcHub.sol";
import {IFdcRequestFeeConfigurations} from "@flarenetwork/flare-periphery-contracts/coston2/IFdcRequestFeeConfigurations.sol";

contract FeeChecker {
    function getRequestFee(
        bytes calldata _attestationData
    ) external view returns (uint256) {
        // Use the registry to find the FdcHub
        IFdcHub fdcHub = ContractRegistry.getFdcHub();

        // From the FdcHub, get the current fee configuration contract
        IFdcRequestFeeConfigurations feeConfigs = fdcHub
            .fdcRequestFeeConfigurations();

        // Return the fee for the given request data
        return feeConfigs.getRequestFee(_attestationData);
    }
}