contract IAssetProxy is
    IAuthorizable
{
    /// @dev Transfers assets. Either succeeds or throws.
    /// @param assetData Byte array encoded for the respective asset proxy.
    /// @param from Address to transfer asset from.
    /// @param to Address to transfer asset to.
    /// @param amount Amount of asset to transfer.
    function transferFrom(
        bytes assetData,
        address from,
        address to,
        uint256 amount
    )
        external;
    
    /// @dev Gets the proxy id associated with the proxy address.
    /// @return Proxy id.
    function getProxyId()
        external
        pure
        returns (bytes4);
}
function transferFrom(
    bytes assetData,
    address from,
    address to,
    uint256 amount
)
    external;

/// @dev Transfers assets. Either succeeds or throws.
/// @param assetData Byte array encoded for the respective asset proxy.
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.