/// @param market Main Comet proxy contract that is different for each compound market
/// @param amount Amount of tokens to be paid back
/// @param from Address where we are pulling the underlying tokens from
/// @param onBehalf Repay on behalf of which address (if 0x0 defaults to user's wallet)
struct Params {
address market;
uint256 amount;
address from;
address onBehalf;
}