package keeper import ( "fmt" "github.com/cosmos/cosmos-sdk/codec" "github.com/cosmos/cosmos-sdk/store/prefix" sdk "github.com/cosmos/cosmos-sdk/types" authtypes "github.com/cosmos/cosmos-sdk/x/auth/types" paramtypes "github.com/cosmos/cosmos-sdk/x/params/types" "github.com/kava-labs/kava/x/swap/types" ) // Keeper keeper for the swap module type Keeper struct { key sdk.StoreKey cdc codec.Codec paramSubspace paramtypes.Subspace hooks types.SwapHooks accountKeeper types.AccountKeeper bankKeeper types.BankKeeper } // NewKeeper creates a new keeper func NewKeeper( cdc codec.Codec, key sdk.StoreKey, paramstore paramtypes.Subspace, accountKeeper types.AccountKeeper, bankKeeper types.BankKeeper, ) Keeper { if !paramstore.HasKeyTable() { paramstore = paramstore.WithKeyTable(types.ParamKeyTable()) } return Keeper{ key: key, cdc: cdc, paramSubspace: paramstore, accountKeeper: accountKeeper, bankKeeper: bankKeeper, } } // SetHooks adds hooks to the keeper. func (k *Keeper) SetHooks(sh types.SwapHooks) *Keeper { if k.hooks != nil { panic("cannot set swap hooks twice") } k.hooks = sh return k } // ClearHooks clears the hooks on the keeper func (k *Keeper) ClearHooks() { k.hooks = nil } // GetParams returns the params from the store func (k Keeper) GetParams(ctx sdk.Context) types.Params { var p types.Params k.paramSubspace.GetParamSet(ctx, &p) return p } // SetParams sets params on the store func (k Keeper) SetParams(ctx sdk.Context, params types.Params) { k.paramSubspace.SetParamSet(ctx, ¶ms) } // GetSwapFee returns the swap fee set in the module parameters func (k Keeper) GetSwapFee(ctx sdk.Context) sdk.Dec { return k.GetParams(ctx).SwapFee } // GetSwapModuleAccount returns the swap ModuleAccount func (k Keeper) GetSwapModuleAccount(ctx sdk.Context) authtypes.ModuleAccountI { return k.accountKeeper.GetModuleAccount(ctx, types.ModuleAccountName) } // GetPool retrieves a pool record from the store func (k Keeper) GetPool(ctx sdk.Context, poolID string) (types.PoolRecord, bool) { store := prefix.NewStore(ctx.KVStore(k.key), types.PoolKeyPrefix) bz := store.Get(types.PoolKey(poolID)) if bz == nil { return types.PoolRecord{}, false } var record types.PoolRecord k.cdc.MustUnmarshal(bz, &record) return record, true } // SetPool_Raw saves a pool record to the store without any validation func (k Keeper) SetPool_Raw(ctx sdk.Context, record types.PoolRecord) { store := prefix.NewStore(ctx.KVStore(k.key), types.PoolKeyPrefix) bz := k.cdc.MustMarshal(&record) store.Set(types.PoolKey(record.PoolID), bz) } // SetPool saves a pool to the store and panics if the record is invalid func (k Keeper) SetPool(ctx sdk.Context, record types.PoolRecord) { if err := record.Validate(); err != nil { panic(fmt.Sprintf("invalid pool record: %s", err)) } k.SetPool_Raw(ctx, record) } // DeletePool deletes a pool record from the store func (k Keeper) DeletePool(ctx sdk.Context, poolID string) { store := prefix.NewStore(ctx.KVStore(k.key), types.PoolKeyPrefix) store.Delete(types.PoolKey(poolID)) } // IteratePools iterates over all pool objects in the store and performs a callback function func (k Keeper) IteratePools(ctx sdk.Context, cb func(record types.PoolRecord) (stop bool)) { store := prefix.NewStore(ctx.KVStore(k.key), types.PoolKeyPrefix) iterator := sdk.KVStorePrefixIterator(store, []byte{}) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { var record types.PoolRecord k.cdc.MustUnmarshal(iterator.Value(), &record) if cb(record) { break } } } // GetAllPools returns all pool records from the store func (k Keeper) GetAllPools(ctx sdk.Context) (records types.PoolRecords) { k.IteratePools(ctx, func(record types.PoolRecord) bool { records = append(records, record) return false }) return } // GetPoolShares gets the total shares in a pool from the store func (k Keeper) GetPoolShares(ctx sdk.Context, poolID string) (sdk.Int, bool) { pool, found := k.GetPool(ctx, poolID) if !found { return sdk.Int{}, false } return pool.TotalShares, true } // GetDepositorShares gets a share record from the store func (k Keeper) GetDepositorShares(ctx sdk.Context, depositor sdk.AccAddress, poolID string) (types.ShareRecord, bool) { store := prefix.NewStore(ctx.KVStore(k.key), types.DepositorPoolSharesPrefix) bz := store.Get(types.DepositorPoolSharesKey(depositor, poolID)) if bz == nil { return types.ShareRecord{}, false } var record types.ShareRecord k.cdc.MustUnmarshal(bz, &record) return record, true } // SetDepositorShares_Raw saves a share record to the store without validation func (k Keeper) SetDepositorShares_Raw(ctx sdk.Context, record types.ShareRecord) { store := prefix.NewStore(ctx.KVStore(k.key), types.DepositorPoolSharesPrefix) bz := k.cdc.MustMarshal(&record) store.Set(types.DepositorPoolSharesKey(record.Depositor, record.PoolID), bz) } // SetDepositorShares saves a share record to the store and panics if the record is invalid func (k Keeper) SetDepositorShares(ctx sdk.Context, record types.ShareRecord) { if err := record.Validate(); err != nil { panic(fmt.Sprintf("invalid share record: %s", err)) } k.SetDepositorShares_Raw(ctx, record) } // DeleteDepositorShares deletes a share record from the store func (k Keeper) DeleteDepositorShares(ctx sdk.Context, depositor sdk.AccAddress, poolID string) { store := prefix.NewStore(ctx.KVStore(k.key), types.DepositorPoolSharesPrefix) store.Delete(types.DepositorPoolSharesKey(depositor, poolID)) } // IterateDepositorShares iterates over all pool objects in the store and performs a callback function func (k Keeper) IterateDepositorShares(ctx sdk.Context, cb func(record types.ShareRecord) (stop bool)) { store := prefix.NewStore(ctx.KVStore(k.key), types.DepositorPoolSharesPrefix) iterator := sdk.KVStorePrefixIterator(store, []byte{}) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { var record types.ShareRecord k.cdc.MustUnmarshal(iterator.Value(), &record) if cb(record) { break } } } // GetAllDepositorShares returns all depositor share records from the store func (k Keeper) GetAllDepositorShares(ctx sdk.Context) (records types.ShareRecords) { k.IterateDepositorShares(ctx, func(record types.ShareRecord) bool { records = append(records, record) return false }) return } // IterateDepositorSharesByOwner iterates over share records for a specific address and performs a callback function func (k Keeper) IterateDepositorSharesByOwner(ctx sdk.Context, owner sdk.AccAddress, cb func(record types.ShareRecord) (stop bool)) { store := prefix.NewStore(ctx.KVStore(k.key), types.DepositorPoolSharesPrefix) iterator := sdk.KVStorePrefixIterator(store, owner.Bytes()) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { var record types.ShareRecord k.cdc.MustUnmarshal(iterator.Value(), &record) if cb(record) { break } } } // GetAllDepositorSharesByOwner returns all depositor share records from the store for a specific address func (k Keeper) GetAllDepositorSharesByOwner(ctx sdk.Context, owner sdk.AccAddress) (records types.ShareRecords) { k.IterateDepositorSharesByOwner(ctx, owner, func(record types.ShareRecord) bool { records = append(records, record) return false }) return } // GetDepositorSharesAmount gets a depositor's shares in a pool from the store func (k Keeper) GetDepositorSharesAmount(ctx sdk.Context, depositor sdk.AccAddress, poolID string) (sdk.Int, bool) { record, found := k.GetDepositorShares(ctx, depositor, poolID) if !found { return sdk.Int{}, false } return record.SharesOwned, true } // updatePool updates a pool, deleting the pool record if the shares are zero func (k Keeper) updatePool(ctx sdk.Context, poolID string, pool *types.DenominatedPool) { if pool.TotalShares().IsZero() { k.DeletePool(ctx, poolID) } else { k.SetPool(ctx, types.NewPoolRecordFromPool(pool)) } } // updateDepositorShares updates a depositor share records for a pool, deleting the record if the new shares are zero func (k Keeper) updateDepositorShares(ctx sdk.Context, owner sdk.AccAddress, poolID string, shares sdk.Int) { if shares.IsZero() { k.DeleteDepositorShares(ctx, owner, poolID) } else { shareRecord := types.NewShareRecord(owner, poolID, shares) k.SetDepositorShares(ctx, shareRecord) } } func (k Keeper) loadDenominatedPool(ctx sdk.Context, poolID string) (*types.DenominatedPool, error) { poolRecord, found := k.GetPool(ctx, poolID) if !found { return &types.DenominatedPool{}, types.ErrInvalidPool } denominatedPool, err := types.NewDenominatedPoolWithExistingShares(poolRecord.Reserves(), poolRecord.TotalShares) if err != nil { return &types.DenominatedPool{}, types.ErrInvalidPool } return denominatedPool, nil }