forked from cerc-io/laconicd-deprecated
657 lines
21 KiB
Go
657 lines
21 KiB
Go
package keeper
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import (
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"encoding/hex"
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"encoding/json"
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"fmt"
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"time"
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"github.com/cosmos/cosmos-sdk/codec"
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storetypes "github.com/cosmos/cosmos-sdk/store/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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auth "github.com/cosmos/cosmos-sdk/x/auth/keeper"
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bank "github.com/cosmos/cosmos-sdk/x/bank/keeper"
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params "github.com/cosmos/cosmos-sdk/x/params/types"
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"github.com/tharsis/ethermint/x/auction/types"
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wnsUtils "github.com/tharsis/ethermint/utils"
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)
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// CompletedAuctionDeleteTimeout => Completed auctions are deleted after this timeout (after reveals end time).
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const CompletedAuctionDeleteTimeout = time.Hour * 24
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// PrefixIDToAuctionIndex is the prefix for Id -> Auction index in the KVStore.
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// Note: This is the primary index in the system.
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// Note: Golang doesn't support const arrays.
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var PrefixIDToAuctionIndex = []byte{0x00}
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// prefixOwnerToAuctionsIndex is the prefix for the Owner -> [Auction] index in the KVStore.
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var prefixOwnerToAuctionsIndex = []byte{0x01}
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// PrefixAuctionBidsIndex is the prefix for the (auction, bidder) -> Bid index in the KVStore.
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var PrefixAuctionBidsIndex = []byte{0x02}
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// PrefixBidderToAuctionsIndex is the prefix for the Bidder -> [Auction] index in the KVStore.
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var PrefixBidderToAuctionsIndex = []byte{0x03}
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// Keeper maintains the link to storage and exposes getter/setter methods for the various parts of the state machine
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type Keeper struct {
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accountKeeper auth.AccountKeeper
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bankKeeper bank.Keeper
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// Track auction usage in other cosmos-sdk modules (more like a usage tracker).
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usageKeepers []types.AuctionUsageKeeper
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storeKey storetypes.StoreKey // Unexposed key to access store from sdk.Context
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cdc codec.BinaryCodec // The wire codec for binary encoding/decoding.
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paramSubspace params.Subspace
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}
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// AuctionClientKeeper is the subset of functionality exposed to other modules.
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type AuctionClientKeeper interface {
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HasAuction(ctx sdk.Context, id string) bool
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GetAuction(ctx sdk.Context, id string) types.Auction
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MatchAuctions(ctx sdk.Context, matchFn func(*types.Auction) bool) []*types.Auction
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}
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// NewKeeper creates new instances of the auction Keeper
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func NewKeeper(accountKeeper auth.AccountKeeper, bankKeeper bank.Keeper, storeKey storetypes.StoreKey, cdc codec.BinaryCodec, ps params.Subspace) Keeper {
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if !ps.HasKeyTable() {
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ps = ps.WithKeyTable(types.ParamKeyTable())
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}
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return Keeper{
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accountKeeper: accountKeeper,
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bankKeeper: bankKeeper,
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storeKey: storeKey,
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cdc: cdc,
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paramSubspace: ps,
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}
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}
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func (k *Keeper) SetUsageKeepers(usageKeepers []types.AuctionUsageKeeper) {
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k.usageKeepers = usageKeepers
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}
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func (k Keeper) GetUsageKeepers() []types.AuctionUsageKeeper {
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return k.usageKeepers
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}
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// Generates Auction Id -> Auction index key.
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func GetAuctionIndexKey(id string) []byte {
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return append(PrefixIDToAuctionIndex, []byte(id)...)
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}
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// Generates Owner -> Auctions index key.
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func GetOwnerToAuctionsIndexKey(owner string, auctionID string) []byte {
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return append(append(prefixOwnerToAuctionsIndex, []byte(owner)...), []byte(auctionID)...)
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}
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func GetBidderToAuctionsIndexKey(bidder string, auctionID string) []byte {
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return append(append(PrefixBidderToAuctionsIndex, []byte(bidder)...), []byte(auctionID)...)
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}
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func GetBidIndexKey(auctionID string, bidder string) []byte {
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return append(GetAuctionBidsIndexPrefix(auctionID), []byte(bidder)...)
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}
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func GetAuctionBidsIndexPrefix(auctionID string) []byte {
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return append(append(PrefixAuctionBidsIndex, []byte(auctionID)...))
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}
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// SaveAuction - saves a auction to the store.
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func (k Keeper) SaveAuction(ctx sdk.Context, auction *types.Auction) {
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store := ctx.KVStore(k.storeKey)
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// Auction Id -> Auction index.
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store.Set(GetAuctionIndexKey(auction.Id), k.cdc.MustMarshal(auction))
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// Owner -> [Auction] index.
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store.Set(GetOwnerToAuctionsIndexKey(auction.OwnerAddress, auction.Id), []byte{})
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// Notify interested parties.
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for _, keeper := range k.usageKeepers {
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keeper.OnAuction(ctx, auction.Id)
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}
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}
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func (k Keeper) SaveBid(ctx sdk.Context, bid *types.Bid) {
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store := ctx.KVStore(k.storeKey)
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store.Set(GetBidIndexKey(bid.AuctionId, bid.BidderAddress), k.cdc.MustMarshal(bid))
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store.Set(GetBidderToAuctionsIndexKey(bid.BidderAddress, bid.AuctionId), []byte{})
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// Notify interested parties.
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for _, keeper := range k.usageKeepers {
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keeper.OnAuctionBid(ctx, bid.AuctionId, bid.BidderAddress)
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}
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}
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func (k Keeper) DeleteBid(ctx sdk.Context, bid types.Bid) {
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store := ctx.KVStore(k.storeKey)
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store.Delete(GetBidIndexKey(bid.AuctionId, bid.BidderAddress))
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store.Delete(GetOwnerToAuctionsIndexKey(bid.BidderAddress, bid.AuctionId))
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}
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// HasAuction - checks if a auction by the given Id exists.
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func (k Keeper) HasAuction(ctx sdk.Context, id string) bool {
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store := ctx.KVStore(k.storeKey)
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return store.Has(GetAuctionIndexKey(id))
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}
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func (k Keeper) HasBid(ctx sdk.Context, id string, bidder string) bool {
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store := ctx.KVStore(k.storeKey)
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return store.Has(GetBidIndexKey(id, bidder))
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}
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// DeleteAuction - deletes the auction.
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func (k Keeper) DeleteAuction(ctx sdk.Context, auction types.Auction) {
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// Delete all bids first.
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bids := k.GetBids(ctx, auction.Id)
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for _, bid := range bids {
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k.DeleteBid(ctx, *bid)
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}
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// Delete the auction itself.
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store := ctx.KVStore(k.storeKey)
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store.Delete(GetAuctionIndexKey(auction.Id))
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store.Delete(GetOwnerToAuctionsIndexKey(auction.OwnerAddress, auction.Id))
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}
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// GetAuction - gets a record from the store.
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func (k Keeper) GetAuction(ctx sdk.Context, id string) *types.Auction {
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store := ctx.KVStore(k.storeKey)
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auctionKey := GetAuctionIndexKey(id)
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if !store.Has(auctionKey) {
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return nil
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}
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bz := store.Get(auctionKey)
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var obj types.Auction
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k.cdc.MustUnmarshal(bz, &obj)
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return &obj
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}
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// GetBids gets the auction bids.
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func (k Keeper) GetBids(ctx sdk.Context, id string) []*types.Bid {
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store := ctx.KVStore(k.storeKey)
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bids := []*types.Bid{}
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itr := sdk.KVStorePrefixIterator(store, GetAuctionBidsIndexPrefix(id))
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defer itr.Close()
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for ; itr.Valid(); itr.Next() {
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bz := store.Get(itr.Key())
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if bz != nil {
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var obj types.Bid
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k.cdc.MustUnmarshal(bz, &obj)
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bids = append(bids, &obj)
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}
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}
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return bids
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}
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func (k Keeper) GetBid(ctx sdk.Context, id string, bidder string) types.Bid {
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store := ctx.KVStore(k.storeKey)
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bz := store.Get(GetBidIndexKey(id, bidder))
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var obj types.Bid
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k.cdc.MustUnmarshal(bz, &obj)
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return obj
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}
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// ListAuctions - get all auctions.
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func (k Keeper) ListAuctions(ctx sdk.Context) []types.Auction {
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var auctions []types.Auction
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store := ctx.KVStore(k.storeKey)
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itr := sdk.KVStorePrefixIterator(store, PrefixIDToAuctionIndex)
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defer itr.Close()
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for ; itr.Valid(); itr.Next() {
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bz := store.Get(itr.Key())
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if bz != nil {
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var obj types.Auction
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k.cdc.MustUnmarshal(bz, &obj)
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auctions = append(auctions, obj)
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}
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}
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return auctions
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}
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// QueryAuctionsByOwner - query auctions by owner.
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func (k Keeper) QueryAuctionsByOwner(ctx sdk.Context, ownerAddress string) []types.Auction {
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auctions := []types.Auction{}
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ownerPrefix := append(prefixOwnerToAuctionsIndex, []byte(ownerAddress)...)
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store := ctx.KVStore(k.storeKey)
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itr := sdk.KVStorePrefixIterator(store, ownerPrefix)
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defer itr.Close()
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for ; itr.Valid(); itr.Next() {
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auctionID := itr.Key()[len(ownerPrefix):]
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bz := store.Get(append(PrefixIDToAuctionIndex, auctionID...))
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if bz != nil {
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var obj types.Auction
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k.cdc.MustUnmarshal(bz, &obj)
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auctions = append(auctions, obj)
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}
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}
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return auctions
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}
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// QueryAuctionsByBidder - query auctions by bidder
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func (k Keeper) QueryAuctionsByBidder(ctx sdk.Context, bidderAddress string) []types.Auction {
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auctions := []types.Auction{}
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bidderPrefix := append(PrefixBidderToAuctionsIndex, []byte(bidderAddress)...)
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store := ctx.KVStore(k.storeKey)
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itr := sdk.KVStorePrefixIterator(store, []byte(bidderPrefix))
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defer itr.Close()
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for ; itr.Valid(); itr.Next() {
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auctionID := itr.Key()[len(bidderPrefix):]
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bz := store.Get(append(PrefixIDToAuctionIndex, auctionID...))
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if bz != nil {
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var obj types.Auction
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k.cdc.MustUnmarshal(bz, &obj)
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auctions = append(auctions, obj)
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}
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}
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return auctions
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}
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// MatchAuctions - get all matching auctions.
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func (k Keeper) MatchAuctions(ctx sdk.Context, matchFn func(*types.Auction) bool) []*types.Auction {
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var auctions []*types.Auction
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store := ctx.KVStore(k.storeKey)
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itr := sdk.KVStorePrefixIterator(store, PrefixIDToAuctionIndex)
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defer itr.Close()
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for ; itr.Valid(); itr.Next() {
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bz := store.Get(itr.Key())
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if bz != nil {
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var obj types.Auction
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k.cdc.MustUnmarshal(bz, &obj)
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if matchFn(&obj) {
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auctions = append(auctions, &obj)
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}
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}
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}
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return auctions
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}
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// CreateAuction creates a new auction.
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func (k Keeper) CreateAuction(ctx sdk.Context, msg types.MsgCreateAuction) (*types.Auction, error) {
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// Might be called from another module directly, always validate.
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err := msg.ValidateBasic()
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if err != nil {
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return nil, err
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}
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signerAddress, err := sdk.AccAddressFromBech32(msg.Signer)
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if err != nil {
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return nil, err
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}
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// Generate auction Id.
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account := k.accountKeeper.GetAccount(ctx, signerAddress)
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if account == nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "Account not found.")
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}
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auctionID := types.AuctionID{
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Address: signerAddress,
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AccNum: account.GetAccountNumber(),
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Sequence: account.GetSequence(),
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}.Generate()
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// Compute timestamps.
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now := ctx.BlockTime()
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commitsEndTime := now.Add(time.Duration(msg.CommitsDuration))
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revealsEndTime := now.Add(time.Duration(msg.CommitsDuration + msg.RevealsDuration))
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auction := types.Auction{
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Id: auctionID,
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Status: types.AuctionStatusCommitPhase,
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OwnerAddress: signerAddress.String(),
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CreateTime: now,
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CommitsEndTime: commitsEndTime,
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RevealsEndTime: revealsEndTime,
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CommitFee: msg.CommitFee,
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RevealFee: msg.RevealFee,
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MinimumBid: msg.MinimumBid,
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}
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// Save auction in store.
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k.SaveAuction(ctx, &auction)
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return &auction, nil
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}
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func (k Keeper) CommitBid(ctx sdk.Context, msg types.MsgCommitBid) (*types.Bid, error) {
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if !k.HasAuction(ctx, msg.AuctionId) {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Auction not found.")
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}
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auction := k.GetAuction(ctx, msg.AuctionId)
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if auction.Status != types.AuctionStatusCommitPhase {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Auction is not in commit phase.")
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}
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signerAddress, err := sdk.AccAddressFromBech32(msg.Signer)
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if err != nil {
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return nil, err
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}
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// Take auction fees from account.
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totalFee := auction.CommitFee.Add(auction.RevealFee)
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sdkErr := k.bankKeeper.SendCoinsFromAccountToModule(ctx, signerAddress, types.ModuleName, sdk.NewCoins(totalFee))
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if sdkErr != nil {
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return nil, sdkErr
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}
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// Check if an old bid already exists, if so, return old bids auction fee (update bid scenario).
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bidder := signerAddress.String()
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if k.HasBid(ctx, msg.AuctionId, bidder) {
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oldBid := k.GetBid(ctx, msg.AuctionId, bidder)
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oldTotalFee := oldBid.CommitFee.Add(oldBid.RevealFee)
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sdkErr := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, signerAddress, sdk.NewCoins(oldTotalFee))
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if sdkErr != nil {
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return nil, sdkErr
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}
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}
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// Save new bid.
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bid := types.Bid{
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AuctionId: msg.AuctionId,
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BidderAddress: bidder,
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Status: types.BidStatusCommitted,
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CommitHash: msg.CommitHash,
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CommitTime: ctx.BlockTime(),
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CommitFee: auction.CommitFee,
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RevealFee: auction.RevealFee,
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}
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k.SaveBid(ctx, &bid)
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return &bid, nil
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}
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// RevealBid reeals a bid committed earlier.
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func (k Keeper) RevealBid(ctx sdk.Context, msg types.MsgRevealBid) (*types.Auction, error) {
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if !k.HasAuction(ctx, msg.AuctionId) {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Auction not found.")
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}
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auction := k.GetAuction(ctx, msg.AuctionId)
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if auction.Status != types.AuctionStatusRevealPhase {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Auction is not in reveal phase.")
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}
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signerAddress, err := sdk.AccAddressFromBech32(msg.Signer)
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if err != nil {
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return nil, err
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}
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if !k.HasBid(ctx, msg.AuctionId, signerAddress.String()) {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Bid not found.")
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}
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bid := k.GetBid(ctx, auction.Id, signerAddress.String())
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if bid.Status != types.BidStatusCommitted {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Bid not in committed state.")
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}
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revealBytes, err := hex.DecodeString(msg.Reveal)
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal string.")
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}
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cid, err := wnsUtils.CIDFromJSONBytes(revealBytes)
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal JSON.")
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}
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if bid.CommitHash != cid {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Commit hash mismatch.")
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}
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var reveal map[string]interface{}
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err = json.Unmarshal(revealBytes, &reveal)
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Reveal JSON unmarshal error.")
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}
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chainID, err := wnsUtils.GetAttributeAsString(reveal, "chainId")
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if err != nil || chainID != ctx.ChainID() {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal chainID.")
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}
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auctionID, err := wnsUtils.GetAttributeAsString(reveal, "auctionId")
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if err != nil || auctionID != msg.AuctionId {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal auction Id.")
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}
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bidderAddress, err := wnsUtils.GetAttributeAsString(reveal, "bidderAddress")
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal bid address.")
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}
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if bidderAddress != signerAddress.String() {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Reveal bid address mismatch.")
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}
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bidAmountStr, err := wnsUtils.GetAttributeAsString(reveal, "bidAmount")
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal bid amount.")
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}
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bidAmount, err := sdk.ParseCoinNormalized(bidAmountStr)
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Invalid reveal bid amount.")
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}
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if bidAmount.IsLT(auction.MinimumBid) {
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return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Bid is lower than minimum bid.")
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}
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// Lock bid amount.
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sdkErr := k.bankKeeper.SendCoinsFromAccountToModule(ctx, signerAddress, types.ModuleName, sdk.NewCoins(bidAmount))
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if sdkErr != nil {
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return nil, sdkErr
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}
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// Update bid.
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bid.BidAmount = bidAmount
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bid.RevealTime = ctx.BlockTime()
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bid.Status = types.BidStatusRevealed
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k.SaveBid(ctx, &bid)
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return auction, nil
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}
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// GetAuctionModuleBalances gets the auction module account(s) balances.
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|
func (k Keeper) GetAuctionModuleBalances(ctx sdk.Context) sdk.Coins {
|
|
moduleAddress := k.accountKeeper.GetModuleAddress(types.ModuleName)
|
|
balances := k.bankKeeper.GetAllBalances(ctx, moduleAddress)
|
|
return balances
|
|
}
|
|
|
|
func (k Keeper) EndBlockerProcessAuctions(ctx sdk.Context) {
|
|
// Transition auction state (commit, reveal, expired, completed).
|
|
k.processAuctionPhases(ctx)
|
|
|
|
// Delete stale auctions.
|
|
k.deleteCompletedAuctions(ctx)
|
|
}
|
|
|
|
func (k Keeper) processAuctionPhases(ctx sdk.Context) {
|
|
auctions := k.MatchAuctions(ctx, func(_ *types.Auction) bool {
|
|
return true
|
|
})
|
|
|
|
for _, auction := range auctions {
|
|
// Commit -> Reveal state.
|
|
if auction.Status == types.AuctionStatusCommitPhase && ctx.BlockTime().After(auction.CommitsEndTime) {
|
|
auction.Status = types.AuctionStatusRevealPhase
|
|
k.SaveAuction(ctx, auction)
|
|
ctx.Logger().Info(fmt.Sprintf("Moved auction %s to reveal phase.", auction.Id))
|
|
}
|
|
|
|
// Reveal -> Expired state.
|
|
if auction.Status == types.AuctionStatusRevealPhase && ctx.BlockTime().After(auction.RevealsEndTime) {
|
|
auction.Status = types.AuctionStatusExpired
|
|
k.SaveAuction(ctx, auction)
|
|
ctx.Logger().Info(fmt.Sprintf("Moved auction %s to expired state.", auction.Id))
|
|
}
|
|
|
|
// If auction has expired, pick a winner from revealed bids.
|
|
if auction.Status == types.AuctionStatusExpired {
|
|
k.pickAuctionWinner(ctx, auction)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Delete completed stale auctions.
|
|
func (k Keeper) deleteCompletedAuctions(ctx sdk.Context) {
|
|
auctions := k.MatchAuctions(ctx, func(auction *types.Auction) bool {
|
|
deleteTime := auction.RevealsEndTime.Add(CompletedAuctionDeleteTimeout)
|
|
return auction.Status == types.AuctionStatusCompleted && ctx.BlockTime().After(deleteTime)
|
|
})
|
|
|
|
for _, auction := range auctions {
|
|
ctx.Logger().Info(fmt.Sprintf("Deleting completed auction %s after timeout.", auction.Id))
|
|
k.DeleteAuction(ctx, *auction)
|
|
}
|
|
}
|
|
|
|
func (k Keeper) pickAuctionWinner(ctx sdk.Context, auction *types.Auction) {
|
|
ctx.Logger().Info(fmt.Sprintf("Picking auction %s winner.", auction.Id))
|
|
|
|
var highestBid *types.Bid
|
|
var secondHighestBid *types.Bid
|
|
|
|
bids := k.GetBids(ctx, auction.Id)
|
|
for _, bid := range bids {
|
|
ctx.Logger().Info(fmt.Sprintf("Processing bid %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
|
|
// Only consider revealed bids.
|
|
if bid.Status != types.BidStatusRevealed {
|
|
ctx.Logger().Info(fmt.Sprintf("Ignoring unrevealed bid %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
continue
|
|
}
|
|
|
|
// Init highest bid.
|
|
if highestBid == nil {
|
|
highestBid = bid
|
|
ctx.Logger().Info(fmt.Sprintf("Initializing 1st bid %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
continue
|
|
}
|
|
|
|
if highestBid.BidAmount.IsLT(bid.BidAmount) {
|
|
ctx.Logger().Info(fmt.Sprintf("New highest bid %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
|
|
secondHighestBid = highestBid
|
|
highestBid = bid
|
|
|
|
ctx.Logger().Info(fmt.Sprintf("Updated 1st bid %s %s", highestBid.BidderAddress, highestBid.BidAmount.String()))
|
|
ctx.Logger().Info(fmt.Sprintf("Updated 2nd bid %s %s", secondHighestBid.BidderAddress, secondHighestBid.BidAmount.String()))
|
|
} else if secondHighestBid == nil || secondHighestBid.BidAmount.IsLT(bid.BidAmount) {
|
|
ctx.Logger().Info(fmt.Sprintf("New 2nd highest bid %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
|
|
secondHighestBid = bid
|
|
ctx.Logger().Info(fmt.Sprintf("Updated 2nd bid %s %s", secondHighestBid.BidderAddress, secondHighestBid.BidAmount.String()))
|
|
} else {
|
|
ctx.Logger().Info(fmt.Sprintf("Ignoring bid as it doesn't affect 1st/2nd price %s %s", bid.BidderAddress, bid.BidAmount.String()))
|
|
}
|
|
}
|
|
|
|
// Highest bid is the winner, but pays second highest bid price.
|
|
auction.Status = types.AuctionStatusCompleted
|
|
|
|
if highestBid != nil {
|
|
auction.WinnerAddress = highestBid.BidderAddress
|
|
auction.WinningBid = highestBid.BidAmount
|
|
|
|
// Winner pays 2nd price, if a 2nd price exists.
|
|
auction.WinningPrice = highestBid.BidAmount
|
|
if secondHighestBid != nil {
|
|
auction.WinningPrice = secondHighestBid.BidAmount
|
|
}
|
|
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s winner %s.", auction.Id, auction.WinnerAddress))
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s winner bid %s.", auction.Id, auction.WinningBid.String()))
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s winner price %s.", auction.Id, auction.WinningPrice.String()))
|
|
} else {
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s has no valid revealed bids (no winner).", auction.Id))
|
|
}
|
|
|
|
k.SaveAuction(ctx, auction)
|
|
|
|
for _, bid := range bids {
|
|
bidderAddress, err := sdk.AccAddressFromBech32(bid.BidderAddress)
|
|
if err != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Invalid bidderAddress address. %v", err))
|
|
panic("Invalid bidder address.")
|
|
}
|
|
|
|
if bid.Status == types.BidStatusRevealed {
|
|
// Send reveal fee back to bidders that've revealed the bid.
|
|
sdkErr := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, bidderAddress, sdk.NewCoins(bid.RevealFee))
|
|
if sdkErr != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Auction error returning reveal fee: %v", sdkErr))
|
|
panic(sdkErr)
|
|
}
|
|
}
|
|
|
|
// Send back locked bid amount to all bidders.
|
|
sdkErr := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, bidderAddress, sdk.NewCoins(bid.BidAmount))
|
|
if sdkErr != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Auction error returning bid amount: %v", sdkErr))
|
|
panic(sdkErr)
|
|
}
|
|
}
|
|
|
|
// Process winner account (if nobody bids, there won't be a winner).
|
|
if auction.WinnerAddress != "" {
|
|
winnerAddress, err := sdk.AccAddressFromBech32(auction.WinnerAddress)
|
|
if err != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Invalid winner address. %v", err))
|
|
panic("Invalid winner address.")
|
|
}
|
|
|
|
// Take 2nd price from winner.
|
|
sdkErr := k.bankKeeper.SendCoinsFromAccountToModule(ctx, winnerAddress, types.ModuleName, sdk.NewCoins(auction.WinningPrice))
|
|
if sdkErr != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Auction error taking funds from winner: %v", sdkErr))
|
|
panic(sdkErr)
|
|
}
|
|
|
|
// Burn anything over the min. bid amount.
|
|
amountToBurn := auction.WinningPrice.Sub(auction.MinimumBid)
|
|
if amountToBurn.IsNegative() {
|
|
ctx.Logger().Error(fmt.Sprintf("Auction coins to burn cannot be negative."))
|
|
panic("Auction coins to burn cannot be negative.")
|
|
}
|
|
|
|
// Use auction burn module account instead of actually burning coins to better keep track of supply.
|
|
sdkErr = k.bankKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleName, types.AuctionBurnModuleAccountName, sdk.NewCoins(amountToBurn))
|
|
if sdkErr != nil {
|
|
ctx.Logger().Error(fmt.Sprintf("Auction error burning coins: %v", sdkErr))
|
|
panic(sdkErr)
|
|
}
|
|
}
|
|
|
|
// Notify other modules (hook).
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s notifying %d modules.", auction.Id, len(k.usageKeepers)))
|
|
for _, keeper := range k.usageKeepers {
|
|
ctx.Logger().Info(fmt.Sprintf("Auction %s notifying module %s.", auction.Id, keeper.ModuleName()))
|
|
keeper.OnAuctionWinnerSelected(ctx, auction.Id)
|
|
}
|
|
}
|