Computers

/**
 * @title IRateComputer
 * @notice An interface that defines a contract that computes rates.
 */
interface IRateComputer {
    /// @notice Computes the rate for a token.
    /// @param token The address of the token to compute the rate for.
    /// @return rate The rate for the token.
    function computeRate(address token) external view returns (uint64);
}

interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}