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auction.go
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auction.go
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package keeper
import (
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/crescent-network/crescent/v5/x/liquidamm/types"
)
// PlaceBid handles types.MsgPlaceBid and stores bid object.
func (k Keeper) PlaceBid(
ctx sdk.Context, bidderAddr sdk.AccAddress, publicPositionId, auctionId uint64, share sdk.Coin) (bid types.Bid, err error) {
publicPosition, found := k.GetPublicPosition(ctx, publicPositionId)
if !found {
return bid, sdkerrors.Wrap(sdkerrors.ErrNotFound, "public position not found")
}
if shareDenom := types.ShareDenom(publicPositionId); share.Denom != shareDenom {
return bid, sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, "share denom != %s", shareDenom)
}
if share.Amount.LT(publicPosition.MinBidAmount) {
return bid, sdkerrors.Wrapf(
sdkerrors.ErrInvalidRequest, "share amount must not be smaller than %s", publicPosition.MinBidAmount)
}
auction, found := k.GetRewardsAuction(ctx, publicPositionId, auctionId)
if !found {
return bid, sdkerrors.Wrap(sdkerrors.ErrNotFound, "rewards auction not found")
}
if auction.Status != types.AuctionStatusStarted {
return bid, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "rewards auction is not started")
}
if auction.WinningBid != nil {
if share.Amount.LTE(auction.WinningBid.Share.Amount) {
return bid, sdkerrors.Wrapf(
types.ErrInsufficientBidAmount,
"share amount must be greater than winning bid's share %s", auction.WinningBid.Share.Amount)
}
}
// Refund the previous bid if the bidder has placed bid before
prevBid, found := k.GetBid(ctx, publicPosition.Id, auction.Id, bidderAddr)
if found {
if err := k.refundBid(ctx, publicPosition, prevBid); err != nil {
return bid, err
}
}
// Reserve bidding amount
if err := k.bankKeeper.SendCoins(
ctx, bidderAddr, sdk.MustAccAddressFromBech32(publicPosition.BidReserveAddress),
sdk.NewCoins(share)); err != nil {
return bid, err
}
bid = types.NewBid(publicPosition.Id, auction.Id, bidderAddr, share)
k.SetBid(ctx, bid)
auction.SetWinningBid(&bid)
k.SetRewardsAuction(ctx, auction)
if err := ctx.EventManager().EmitTypedEvent(&types.EventPlaceBid{
Bidder: bidderAddr.String(),
PublicPositionId: publicPositionId,
RewardsAuctionId: auctionId,
Share: share,
}); err != nil {
return bid, err
}
return bid, nil
}
func (k Keeper) refundBid(ctx sdk.Context, publicPosition types.PublicPosition, bid types.Bid) error {
if err := k.bankKeeper.SendCoins(
ctx, sdk.MustAccAddressFromBech32(publicPosition.BidReserveAddress),
sdk.MustAccAddressFromBech32(bid.Bidder), sdk.NewCoins(bid.Share)); err != nil {
return err
}
k.DeleteBid(ctx, bid)
if err := ctx.EventManager().EmitTypedEvent(&types.EventBidRefunded{
Bidder: bid.Bidder,
PublicPositionId: bid.PublicPositionId,
RewardsAuctionId: bid.RewardsAuctionId,
Share: bid.Share,
}); err != nil {
return err
}
return nil
}
func (k Keeper) GetLastRewardsAuction(ctx sdk.Context, publicPositionId uint64) (auction types.RewardsAuction, found bool) {
publicPosition, found := k.GetPublicPosition(ctx, publicPositionId)
if !found {
return auction, false
}
if publicPosition.LastRewardsAuctionId == 0 {
return auction, false
}
return k.GetRewardsAuction(ctx, publicPosition.Id, publicPosition.LastRewardsAuctionId)
}
func (k Keeper) GetPreviousRewardsAuction(ctx sdk.Context, publicPosition types.PublicPosition) (auction types.RewardsAuction, found bool) {
if publicPosition.LastRewardsAuctionId <= 1 {
return
}
return k.GetRewardsAuction(ctx, publicPosition.Id, publicPosition.LastRewardsAuctionId-1)
}
// AdvanceRewardsAuctions advances all rewards auctions' epoch by one and
// sets the next auction end time.
func (k Keeper) AdvanceRewardsAuctions(ctx sdk.Context, nextEndTime time.Time) (err error) {
maxNumRecentAuctions := k.GetMaxNumRecentRewardsAuctions(ctx)
k.IterateAllPublicPositions(ctx, func(publicPosition types.PublicPosition) (stop bool) {
if publicPosition.LastRewardsAuctionId != 0 {
auction, found := k.GetRewardsAuction(ctx, publicPosition.Id, publicPosition.LastRewardsAuctionId)
if !found { // sanity check
panic("rewards auction not found")
}
if auction.WinningBid == nil {
if err = k.SkipRewardsAuction(ctx, publicPosition, auction); err != nil {
return true
}
} else {
if err = k.FinishRewardsAuction(ctx, publicPosition, auction); err != nil {
return true
}
}
}
// Prune old rewards auctions.
lastAuctionId := k.StartNewRewardsAuction(ctx, publicPosition, nextEndTime)
k.IterateRewardsAuctionsByPublicPosition(ctx, publicPosition.Id, func(auction types.RewardsAuction) (stop bool) {
if auction.Id+uint64(maxNumRecentAuctions) >= lastAuctionId {
return true
}
k.DeleteRewardsAuction(ctx, auction)
return false
})
return false
})
k.SetNextRewardsAuctionEndTime(ctx, nextEndTime)
return
}
// StartNewRewardsAuction creates a new rewards auction and increment
// the public position's last rewards auction id.
func (k Keeper) StartNewRewardsAuction(ctx sdk.Context, publicPosition types.PublicPosition, endTime time.Time) (auctionId uint64) {
publicPosition.LastRewardsAuctionId++
auctionId = publicPosition.LastRewardsAuctionId
k.SetPublicPosition(ctx, publicPosition)
startTime := ctx.BlockTime()
auction := types.NewRewardsAuction(
publicPosition.Id, auctionId, startTime, endTime, types.AuctionStatusStarted)
k.SetRewardsAuction(ctx, auction)
return
}
// FinishRewardsAuction finishes ongoing rewards auction by looking up the existence of winning bid.
// Compound accumulated farming rewards for farmers and refund all bids that are placed for the auction if winning bid exists.
// If not, set the compounding rewards to zero and update the auction status AuctionStatusSkipped.
func (k Keeper) FinishRewardsAuction(ctx sdk.Context, publicPosition types.PublicPosition, auction types.RewardsAuction) error {
if auction.WinningBid == nil { // sanity check
panic("auction has no winning bid")
}
winningBid := *auction.WinningBid
position := k.MustGetAMMPosition(ctx, publicPosition)
fee, farmingRewards, err := k.ammKeeper.CollectibleCoins(ctx, position.Id)
if err != nil {
return err
}
rewards := fee.Add(farmingRewards...)
var protocolFee sdk.Coins
if rewards.IsAllPositive() {
moduleAccAddr := k.GetModuleAddress()
// First, collect all rewards.
if err := k.ammKeeper.Collect(ctx, moduleAccAddr, moduleAccAddr, position.Id, rewards); err != nil {
return err
}
var deductedRewards sdk.Coins
deductedRewards, protocolFee = types.DeductFees(rewards, publicPosition.FeeRate)
if deductedRewards.IsAllPositive() {
// Then send deducted rewards to the winning bidder.
winningBidderAddr := sdk.MustAccAddressFromBech32(winningBid.Bidder)
if err := k.bankKeeper.SendCoins(ctx, moduleAccAddr, winningBidderAddr, deductedRewards); err != nil {
return err
}
}
// Fees have been accrued in the module account.
// Now burn the winning bid's share.
if err := k.bankKeeper.SendCoinsFromAccountToModule(
ctx, sdk.MustAccAddressFromBech32(publicPosition.BidReserveAddress),
types.ModuleName, sdk.NewCoins(winningBid.Share)); err != nil {
return err
}
if err := k.bankKeeper.BurnCoins(ctx, types.ModuleName, sdk.NewCoins(winningBid.Share)); err != nil {
return err
}
k.DeleteBid(ctx, winningBid)
}
k.IterateBidsByRewardsAuction(ctx, publicPosition.Id, auction.Id, func(bid types.Bid) (stop bool) {
if err = k.refundBid(ctx, publicPosition, bid); err != nil {
return true
}
return false
})
if err != nil {
return err
}
auction.SetRewards(rewards)
auction.SetFees(protocolFee)
auction.SetStatus(types.AuctionStatusFinished)
k.SetRewardsAuction(ctx, auction)
// TODO: emit event
return nil
}
// SkipRewardsAuction skips rewards auction since there is no bid.
func (k Keeper) SkipRewardsAuction(ctx sdk.Context, publicPosition types.PublicPosition, auction types.RewardsAuction) error {
if auction.WinningBid != nil { // sanity check
panic("auction has winning bid")
}
position, found := k.GetAMMPosition(ctx, publicPosition)
var rewards sdk.Coins
if found {
fee, farmingRewards, err := k.ammKeeper.CollectibleCoins(ctx, position.Id)
if err != nil {
return err
}
rewards = fee.Add(farmingRewards...)
}
auction.SetRewards(rewards)
auction.SetStatus(types.AuctionStatusSkipped)
k.SetRewardsAuction(ctx, auction)
// TODO: emit event
return nil
}