/// @param controllerAddress Address of the curveusd market controller
/// @param from Address from which collAmount of collToken will be pulled
/// @param collAmount Amount of collateral that the user is providing at first
/// @param nBands Number of bands in which the collateral will be supplied for soft liquidation
/// @param exData Exchange data for swapping (srcAmount will be amount of crvUSD to borrow and sell for collateral)
/// @param gasUsed Only used as part of a strategy, estimated gas used for this tx
struct Params {
address controllerAddress;
address from;
uint256 collAmount;
uint256 nBands;
DFSExchangeData.ExchangeData exData;
uint32 gasUsed;
}