type Params struct {
	// auction_period_duration defines the auction period duration
	AuctionPeriod int64 
	// min_next_bid_increment_rate defines the minimum increment rate for new bids
	MinNextBidIncrementRate math.LegacyDec
}

type Bid struct {
	Bidder string                                  
	Amount sdk.Coin 
}

type LastAuctionResult struct {
    Winner string 
    Amount sdk.Coin 
    Round uint64 
}