/// @param vaultId Id of the vault
/// @param amount Amount of tokens to supply
/// @param joinAddr Join address of the maker collateral
/// @param from Address where to pull the collateral from
/// @param mcdManager The manager address we are using [mcd, b.protocol]
struct Params {
uint256 vaultId;
uint256 amount;
address joinAddr;
address from;
address mcdManager;
}