diff --git a/x/hard/genesis.go b/x/hard/genesis.go index 3f61e7b9..a3fdf188 100644 --- a/x/hard/genesis.go +++ b/x/hard/genesis.go @@ -27,6 +27,10 @@ func InitGenesis(ctx sdk.Context, k Keeper, supplyKeeper types.SupplyKeeper, gs } } + for _, mm := range gs.Params.MoneyMarkets { + k.SetMoneyMarket(ctx, mm.Denom, mm) + } + // check if the module account exists LPModuleAcc := supplyKeeper.GetModuleAccount(ctx, LPAccount) if LPModuleAcc == nil { diff --git a/x/hard/keeper/deposit.go b/x/hard/keeper/deposit.go index 0ee522bf..9e3c8ed7 100644 --- a/x/hard/keeper/deposit.go +++ b/x/hard/keeper/deposit.go @@ -91,11 +91,35 @@ func (k Keeper) Withdraw(ctx sdk.Context, depositor sdk.AccAddress, coins sdk.Co return sdkerrors.Wrapf(types.ErrDepositNotFound, "no deposit found for %s", depositor) } - if !deposit.Amount.IsAllGTE(coins) { // TODO test that this works how I think it does - return sdkerrors.Wrapf(types.ErrInvalidWithdrawAmount, "%s>%s", coins, deposit.Amount) + // Get current stored LTV based on stored borrows/deposits + prevLtv, shouldRemoveIndex, err := k.GetStoreLTV(ctx, depositor) + if err != nil { + return err } - err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleAccountName, depositor, coins) + k.SyncOutstandingInterest(ctx, depositor) + + borrow, found := k.GetBorrow(ctx, depositor) + if !found { + borrow = types.Borrow{} + } + + proposedDepositAmount, isNegative := deposit.Amount.SafeSub(coins) + if isNegative { + return types.ErrNegativeBorrowedCoins + } + proposedDeposit := types.NewDeposit(deposit.Depositor, proposedDepositAmount) + + valid, err := k.IsWithinValidLtvRange(ctx, proposedDeposit, borrow) + if err != nil { + return err + } + + if !valid { + return sdkerrors.Wrapf(types.ErrInvalidWithdrawAmount, "proposed withdraw outside loan-to-value range") + } + + err = k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleAccountName, depositor, coins) if err != nil { return err } @@ -122,6 +146,8 @@ func (k Keeper) Withdraw(ctx sdk.Context, depositor sdk.AccAddress, coins sdk.Co deposit.Amount = deposit.Amount.Sub(coins) k.SetDeposit(ctx, deposit) + k.UpdateItemInLtvIndex(ctx, prevLtv, shouldRemoveIndex, depositor) + return nil } diff --git a/x/hard/keeper/deposit_test.go b/x/hard/keeper/deposit_test.go index 1a749849..451e106a 100644 --- a/x/hard/keeper/deposit_test.go +++ b/x/hard/keeper/deposit_test.go @@ -1,7 +1,6 @@ package keeper_test import ( - "fmt" "strings" "time" @@ -267,7 +266,7 @@ func (suite *KeeperTestSuite) TestWithdraw() { }, errArgs{ expectPass: false, - contains: "invalid withdrawal amount", + contains: "subtraction results in negative borrow amount", }, }, { @@ -284,7 +283,7 @@ func (suite *KeeperTestSuite) TestWithdraw() { }, errArgs{ expectPass: false, - contains: "invalid withdrawal amount", + contains: "subtraction results in negative borrow amount", }, }, } @@ -310,10 +309,45 @@ func (suite *KeeperTestSuite) TestWithdraw() { types.MoneyMarkets{ types.NewMoneyMarket("usdx", types.NewBorrowLimit(false, sdk.NewDec(1000000000000000), loanToValue), "usdx:usd", sdk.NewInt(1000000), sdk.NewInt(USDX_CF*1000), types.NewInterestRateModel(sdk.MustNewDecFromStr("0.05"), sdk.MustNewDecFromStr("2"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("10")), sdk.MustNewDecFromStr("0.05"), sdk.ZeroDec()), types.NewMoneyMarket("ukava", types.NewBorrowLimit(false, sdk.NewDec(1000000000000000), loanToValue), "kava:usd", sdk.NewInt(1000000), sdk.NewInt(KAVA_CF*1000), types.NewInterestRateModel(sdk.MustNewDecFromStr("0.05"), sdk.MustNewDecFromStr("2"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("10")), sdk.MustNewDecFromStr("0.05"), sdk.ZeroDec()), + types.NewMoneyMarket("bnb", types.NewBorrowLimit(false, sdk.NewDec(1000000000000000), loanToValue), "bnb:usd", sdk.NewInt(100000000), sdk.NewInt(BNB_CF*1000), types.NewInterestRateModel(sdk.MustNewDecFromStr("0.05"), sdk.MustNewDecFromStr("2"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("10")), sdk.MustNewDecFromStr("0.05"), sdk.ZeroDec()), }, 0, // LTV counter ), types.DefaultPreviousBlockTime, types.DefaultDistributionTimes) - tApp.InitializeFromGenesisStates(authGS, app.GenesisState{types.ModuleName: types.ModuleCdc.MustMarshalJSON(hardGS)}) + + // Pricefeed module genesis state + pricefeedGS := pricefeed.GenesisState{ + Params: pricefeed.Params{ + Markets: []pricefeed.Market{ + {MarketID: "usdx:usd", BaseAsset: "usdx", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true}, + {MarketID: "kava:usd", BaseAsset: "kava", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true}, + {MarketID: "bnb:usd", BaseAsset: "bnb", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true}, + }, + }, + PostedPrices: []pricefeed.PostedPrice{ + { + MarketID: "usdx:usd", + OracleAddress: sdk.AccAddress{}, + Price: sdk.MustNewDecFromStr("1.00"), + Expiry: time.Now().Add(100 * time.Hour), + }, + { + MarketID: "kava:usd", + OracleAddress: sdk.AccAddress{}, + Price: sdk.MustNewDecFromStr("2.00"), + Expiry: time.Now().Add(100 * time.Hour), + }, + { + MarketID: "bnb:usd", + OracleAddress: sdk.AccAddress{}, + Price: sdk.MustNewDecFromStr("10.00"), + Expiry: time.Now().Add(100 * time.Hour), + }, + }, + } + + tApp.InitializeFromGenesisStates(authGS, + app.GenesisState{pricefeed.ModuleName: pricefeed.ModuleCdc.MustMarshalJSON(pricefeedGS)}, + app.GenesisState{types.ModuleName: types.ModuleCdc.MustMarshalJSON(hardGS)}) keeper := tApp.GetHardKeeper() suite.app = tApp suite.ctx = ctx @@ -341,10 +375,181 @@ func (suite *KeeperTestSuite) TestWithdraw() { } } else { suite.Require().Error(err) - fmt.Printf("%s\n", err.Error()) suite.Require().True(strings.Contains(err.Error(), tc.errArgs.contains)) } }) } } + +func (suite *KeeperTestSuite) TestLtvWithdraw() { + type args struct { + borrower sdk.AccAddress + keeper sdk.AccAddress + initialModuleCoins sdk.Coins + initialBorrowerCoins sdk.Coins + initialKeeperCoins sdk.Coins + depositCoins []sdk.Coin + borrowCoins sdk.Coins + futureTime int64 + } + + type errArgs struct { + expectPass bool + contains string + } + + type liqTest struct { + name string + args args + errArgs errArgs + } + + // Set up test constants + model := types.NewInterestRateModel(sdk.MustNewDecFromStr("0"), sdk.MustNewDecFromStr("0.1"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("0.5")) + reserveFactor := sdk.MustNewDecFromStr("0.05") + oneMonthInSeconds := int64(2592000) + borrower := sdk.AccAddress(crypto.AddressHash([]byte("testborrower"))) + keeper := sdk.AccAddress(crypto.AddressHash([]byte("testkeeper"))) + + testCases := []liqTest{ + { + "invalid: withdraw is outside loan-to-value range", + args{ + borrower: borrower, + keeper: keeper, + initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))), + initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))), + initialKeeperCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))), + depositCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(10*KAVA_CF))), + borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(8*KAVA_CF))), + futureTime: oneMonthInSeconds, + }, + errArgs{ + expectPass: false, + contains: "proposed withdraw outside loan-to-value range", + }, + }, + } + + for _, tc := range testCases { + suite.Run(tc.name, func() { + // Initialize test app and set context + tApp := app.NewTestApp() + ctx := tApp.NewContext(true, abci.Header{Height: 1, Time: tmtime.Now()}) + + // Auth module genesis state + authGS := app.NewAuthGenState( + []sdk.AccAddress{tc.args.borrower, tc.args.keeper}, + []sdk.Coins{tc.args.initialBorrowerCoins, tc.args.initialKeeperCoins}, + ) + + // Harvest module genesis state + harvestGS := types.NewGenesisState(types.NewParams( + true, + types.DistributionSchedules{ + types.NewDistributionSchedule(true, "ukava", time.Date(2020, 10, 8, 14, 0, 0, 0, time.UTC), time.Date(2020, 11, 22, 14, 0, 0, 0, time.UTC), sdk.NewCoin("hard", sdk.NewInt(5000)), time.Date(2021, 11, 22, 14, 0, 0, 0, time.UTC), types.Multipliers{types.NewMultiplier(types.Small, 0, sdk.MustNewDecFromStr("0.33")), types.NewMultiplier(types.Medium, 6, sdk.MustNewDecFromStr("0.5")), types.NewMultiplier(types.Medium, 24, sdk.OneDec())}), + }, + types.DelegatorDistributionSchedules{types.NewDelegatorDistributionSchedule( + types.NewDistributionSchedule(true, "usdx", time.Date(2020, 10, 8, 14, 0, 0, 0, time.UTC), time.Date(2025, 10, 8, 14, 0, 0, 0, time.UTC), sdk.NewCoin("hard", sdk.NewInt(500)), time.Date(2026, 10, 8, 14, 0, 0, 0, time.UTC), types.Multipliers{types.NewMultiplier(types.Small, 0, sdk.MustNewDecFromStr("0.33")), types.NewMultiplier(types.Medium, 6, sdk.MustNewDecFromStr("0.5")), types.NewMultiplier(types.Medium, 24, sdk.OneDec())}), + time.Hour*24, + ), + }, + types.MoneyMarkets{ + types.NewMoneyMarket("ukava", + types.NewBorrowLimit(false, sdk.NewDec(100000000*KAVA_CF), sdk.MustNewDecFromStr("0.8")), // Borrow Limit + "kava:usd", // Market ID + sdk.NewInt(KAVA_CF), // Conversion Factor + sdk.NewInt(100000000*KAVA_CF), // Auction Size + model, // Interest Rate Model + reserveFactor, // Reserve Factor + sdk.MustNewDecFromStr("0.05")), // Keeper Reward Percent + }, + 0, // LTV counter + ), types.DefaultPreviousBlockTime, types.DefaultDistributionTimes) + + // Pricefeed module genesis state + pricefeedGS := pricefeed.GenesisState{ + Params: pricefeed.Params{ + Markets: []pricefeed.Market{ + {MarketID: "usdx:usd", BaseAsset: "usdx", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true}, + {MarketID: "kava:usd", BaseAsset: "kava", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true}, + }, + }, + PostedPrices: []pricefeed.PostedPrice{ + { + MarketID: "usdx:usd", + OracleAddress: sdk.AccAddress{}, + Price: sdk.MustNewDecFromStr("1.00"), + Expiry: time.Now().Add(100 * time.Hour), + }, + { + MarketID: "kava:usd", + OracleAddress: sdk.AccAddress{}, + Price: sdk.MustNewDecFromStr("2.00"), + Expiry: time.Now().Add(100 * time.Hour), + }, + }, + } + + // Initialize test application + tApp.InitializeFromGenesisStates(authGS, + app.GenesisState{pricefeed.ModuleName: pricefeed.ModuleCdc.MustMarshalJSON(pricefeedGS)}, + app.GenesisState{types.ModuleName: types.ModuleCdc.MustMarshalJSON(harvestGS)}) + + // Mint coins to Harvest module account + supplyKeeper := tApp.GetSupplyKeeper() + supplyKeeper.MintCoins(ctx, types.ModuleAccountName, tc.args.initialModuleCoins) + + auctionKeeper := tApp.GetAuctionKeeper() + + keeper := tApp.GetHardKeeper() + suite.app = tApp + suite.ctx = ctx + suite.keeper = keeper + suite.auctionKeeper = auctionKeeper + + var err error + + // Run begin blocker to set up state + hard.BeginBlocker(suite.ctx, suite.keeper) + + // Deposit coins + err = suite.keeper.Deposit(suite.ctx, tc.args.borrower, tc.args.depositCoins) + suite.Require().NoError(err) + + // Borrow coins + err = suite.keeper.Borrow(suite.ctx, tc.args.borrower, tc.args.borrowCoins) + suite.Require().NoError(err) + + // Attempting to withdraw fails + err = suite.keeper.Withdraw(suite.ctx, tc.args.borrower, sdk.NewCoins(sdk.NewCoin("ukava", sdk.OneInt()))) + suite.Require().Error(err) + suite.Require().True(strings.Contains(err.Error(), tc.errArgs.contains)) + + // Set up future chain context and run begin blocker, increasing user's owed borrow balance + runAtTime := time.Unix(suite.ctx.BlockTime().Unix()+(tc.args.futureTime), 0) + liqCtx := suite.ctx.WithBlockTime(runAtTime) + hard.BeginBlocker(liqCtx, suite.keeper) + + // Attempted withdraw of 1 coin still fails + err = suite.keeper.Withdraw(suite.ctx, tc.args.borrower, sdk.NewCoins(sdk.NewCoin("ukava", sdk.OneInt()))) + suite.Require().Error(err) + suite.Require().True(strings.Contains(err.Error(), tc.errArgs.contains)) + + // Repay the initial principal + err = suite.keeper.Repay(suite.ctx, tc.args.borrower, tc.args.borrowCoins) + suite.Require().NoError(err) + + // Attempted withdraw of all deposited coins fails as user hasn't repaid interest debt + err = suite.keeper.Withdraw(suite.ctx, tc.args.borrower, tc.args.depositCoins) + suite.Require().Error(err) + suite.Require().True(strings.Contains(err.Error(), tc.errArgs.contains)) + + // Withdrawing half the coins should succeed + withdrawCoins := sdk.NewCoins(sdk.NewCoin("ukava", tc.args.depositCoins[0].Amount.Quo(sdk.NewInt(2)))) + err = suite.keeper.Withdraw(suite.ctx, tc.args.borrower, withdrawCoins) + suite.Require().NoError(err) + }) + } +} diff --git a/x/hard/keeper/liquidation.go b/x/hard/keeper/liquidation.go index 236d048b..3de1391f 100644 --- a/x/hard/keeper/liquidation.go +++ b/x/hard/keeper/liquidation.go @@ -48,60 +48,25 @@ func (k Keeper) AttemptKeeperLiquidation(ctx sdk.Context, keeper sdk.AccAddress, if !found { return false, sdkerrors.Wrapf(types.ErrDepositsNotFound, "no deposits found for %s", borrower) } - depositDenoms := []string{} - for _, depCoin := range deposit.Amount { - depositDenoms = append(depositDenoms, depCoin.Denom) - } // Fetch borrow balances and parse coin denoms - borrows, found := k.GetBorrow(ctx, borrower) + borrow, found := k.GetBorrow(ctx, borrower) if !found { return false, types.ErrBorrowNotFound } - borrowDenoms := getDenoms(borrows.Amount) - liqMap := make(map[string]LiqData) - - // Load required liquidation data for every deposit/borrow denom - denoms := removeDuplicates(borrowDenoms, depositDenoms) - for _, denom := range denoms { - mm, found := k.GetMoneyMarket(ctx, denom) - if !found { - return false, sdkerrors.Wrapf(types.ErrMarketNotFound, "no market found for denom %s", denom) - } - - priceData, err := k.pricefeedKeeper.GetCurrentPrice(ctx, mm.SpotMarketID) - if err != nil { - return false, err - } - - liqMap[denom] = LiqData{priceData.Price, mm.BorrowLimit.LoanToValue, mm.ConversionFactor} + isWithinRange, err := k.IsWithinValidLtvRange(ctx, deposit, borrow) + if err != nil { + return false, err } - - totalBorrowableUSDAmount := sdk.ZeroDec() - totalDepositedUSDAmount := sdk.ZeroDec() - for _, depCoin := range deposit.Amount { - lData := liqMap[depCoin.Denom] - usdValue := sdk.NewDecFromInt(depCoin.Amount).Quo(sdk.NewDecFromInt(lData.conversionFactor)).Mul(lData.price) - totalDepositedUSDAmount = totalDepositedUSDAmount.Add(usdValue) - borrowableUSDAmountForDeposit := usdValue.Mul(lData.ltv) - totalBorrowableUSDAmount = totalBorrowableUSDAmount.Add(borrowableUSDAmountForDeposit) - } - - totalBorrowedUSDAmount := sdk.ZeroDec() - for _, coin := range borrows.Amount { - lData := liqMap[coin.Denom] - usdValue := sdk.NewDecFromInt(coin.Amount).Quo(sdk.NewDecFromInt(lData.conversionFactor)).Mul(lData.price) - totalBorrowedUSDAmount = totalBorrowedUSDAmount.Add(usdValue) - } - - // Validate that the proposed borrow's USD value is within user's borrowable limit - if totalBorrowedUSDAmount.LTE(totalBorrowableUSDAmount) { - return false, sdkerrors.Wrapf(types.ErrBorrowNotLiquidatable, "borrowed %s <= borrowable %s", totalBorrowedUSDAmount, totalBorrowableUSDAmount) + if isWithinRange { + return false, sdkerrors.Wrapf(types.ErrBorrowNotLiquidatable, "position is within valid LTV range") } // Sending coins to auction module with keeper address getting % of the profits - err = k.SeizeDeposits(ctx, keeper, liqMap, deposit, borrows.Amount, depositDenoms, borrowDenoms) + borrowDenoms := getDenoms(borrow.Amount) + depositDenoms := getDenoms(deposit.Amount) + err = k.SeizeDeposits(ctx, keeper, deposit, borrow, depositDenoms, borrowDenoms) if err != nil { return false, err } @@ -112,7 +77,6 @@ func (k Keeper) AttemptKeeperLiquidation(ctx sdk.Context, keeper sdk.AccAddress, } k.RemoveFromLtvIndex(ctx, currLtv, borrower) - borrow, _ := k.GetBorrow(ctx, borrower) k.DeleteBorrow(ctx, borrow) k.DeleteDeposit(ctx, deposit) @@ -120,8 +84,12 @@ func (k Keeper) AttemptKeeperLiquidation(ctx sdk.Context, keeper sdk.AccAddress, } // SeizeDeposits seizes a list of deposits and sends them to auction -func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, liqMap map[string]LiqData, - deposit types.Deposit, borrowBalances sdk.Coins, dDenoms, bDenoms []string) error { +func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, deposit types.Deposit, + borrow types.Borrow, dDenoms, bDenoms []string) error { + liqMap, err := k.LoadLiquidationData(ctx, deposit, borrow) + if err != nil { + return err + } // Seize % of every deposit and send to the keeper aucDeposits := sdk.Coins{} @@ -158,7 +126,7 @@ func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, liqMap map // Build valuation map to hold borrow coin USD valuations borrowCoinValues := types.NewValuationMap() - for _, bCoin := range borrowBalances { + for _, bCoin := range borrow.Amount { bData := liqMap[bCoin.Denom] bCoinUsdValue := sdk.NewDecFromInt(bCoin.Amount).Quo(sdk.NewDecFromInt(bData.conversionFactor)).Mul(bData.price) borrowCoinValues.Increment(bCoin.Denom, bCoinUsdValue) @@ -167,7 +135,7 @@ func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, liqMap map // Loan-to-Value ratio after sending keeper their reward ltv := borrowCoinValues.Sum().Quo(depositCoinValues.Sum()) - err := k.StartAuctions(ctx, deposit.Depositor, borrowBalances, aucDeposits, depositCoinValues, borrowCoinValues, ltv, liqMap) + err = k.StartAuctions(ctx, deposit.Depositor, borrow.Amount, aucDeposits, depositCoinValues, borrowCoinValues, ltv, liqMap) if err != nil { return err } @@ -276,68 +244,36 @@ func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows, return nil } -// GetStoreLTV calculates the user's current LTV based on their deposits/borrows in the store -// and does not include any outsanding interest. -func (k Keeper) GetStoreLTV(ctx sdk.Context, addr sdk.AccAddress) (sdk.Dec, bool, error) { - // Fetch deposits and parse coin denoms - deposit, found := k.GetDeposit(ctx, addr) - if !found { - return sdk.ZeroDec(), false, nil +// IsWithinValidLtvRange compares a borrow and deposit to see if it's within a valid LTV range at current prices +func (k Keeper) IsWithinValidLtvRange(ctx sdk.Context, deposit types.Deposit, borrow types.Borrow) (bool, error) { + liqMap, err := k.LoadLiquidationData(ctx, deposit, borrow) + if err != nil { + return false, err } - depositDenoms := []string{} + + totalBorrowableUSDAmount := sdk.ZeroDec() + totalDepositedUSDAmount := sdk.ZeroDec() for _, depCoin := range deposit.Amount { - depositDenoms = append(depositDenoms, depCoin.Denom) + lData := liqMap[depCoin.Denom] + usdValue := sdk.NewDecFromInt(depCoin.Amount).Quo(sdk.NewDecFromInt(lData.conversionFactor)).Mul(lData.price) + totalDepositedUSDAmount = totalDepositedUSDAmount.Add(usdValue) + borrowableUSDAmountForDeposit := usdValue.Mul(lData.ltv) + totalBorrowableUSDAmount = totalBorrowableUSDAmount.Add(borrowableUSDAmountForDeposit) } - // Fetch borrow balances and parse coin denoms - borrows, found := k.GetBorrow(ctx, addr) - if !found { - return sdk.ZeroDec(), false, nil - } - borrowDenoms := getDenoms(borrows.Amount) - - liqMap := make(map[string]LiqData) - - // Load required liquidation data for every deposit/borrow denom - denoms := removeDuplicates(borrowDenoms, depositDenoms) - for _, denom := range denoms { - mm, found := k.GetMoneyMarket(ctx, denom) - if !found { - return sdk.ZeroDec(), false, sdkerrors.Wrapf(types.ErrMarketNotFound, "no market found for denom %s", denom) - } - - priceData, err := k.pricefeedKeeper.GetCurrentPrice(ctx, mm.SpotMarketID) - if err != nil { - return sdk.ZeroDec(), false, err - } - - liqMap[denom] = LiqData{priceData.Price, mm.BorrowLimit.LoanToValue, mm.ConversionFactor} + totalBorrowedUSDAmount := sdk.ZeroDec() + for _, coin := range borrow.Amount { + lData := liqMap[coin.Denom] + usdValue := sdk.NewDecFromInt(coin.Amount).Quo(sdk.NewDecFromInt(lData.conversionFactor)).Mul(lData.price) + totalBorrowedUSDAmount = totalBorrowedUSDAmount.Add(usdValue) } - // Build valuation map to hold deposit coin USD valuations - depositCoinValues := types.NewValuationMap() - for _, depCoin := range deposit.Amount { - dData := liqMap[depCoin.Denom] - dCoinUsdValue := sdk.NewDecFromInt(depCoin.Amount).Quo(sdk.NewDecFromInt(dData.conversionFactor)).Mul(dData.price) - depositCoinValues.Increment(depCoin.Denom, dCoinUsdValue) + // Check if the user's has borrowed more than they're allowed to + if totalBorrowedUSDAmount.GT(totalBorrowableUSDAmount) { + return false, nil } - // Build valuation map to hold borrow coin USD valuations - borrowCoinValues := types.NewValuationMap() - for _, bCoin := range borrows.Amount { - bData := liqMap[bCoin.Denom] - bCoinUsdValue := sdk.NewDecFromInt(bCoin.Amount).Quo(sdk.NewDecFromInt(bData.conversionFactor)).Mul(bData.price) - borrowCoinValues.Increment(bCoin.Denom, bCoinUsdValue) - } - - // User doesn't have any deposits, catch divide by 0 error - sumDeposits := depositCoinValues.Sum() - if sumDeposits.Equal(sdk.ZeroDec()) { - return sdk.ZeroDec(), false, nil - } - - // Loan-to-Value ratio - return borrowCoinValues.Sum().Quo(sumDeposits), true, nil + return true, nil } // UpdateItemInLtvIndex updates the key a borrower's address is stored under in the LTV index @@ -357,6 +293,86 @@ func (k Keeper) UpdateItemInLtvIndex(ctx sdk.Context, prevLtv sdk.Dec, return nil } +// GetStoreLTV calculates the user's current LTV based on their deposits/borrows in the store +// and does not include any outsanding interest. +func (k Keeper) GetStoreLTV(ctx sdk.Context, addr sdk.AccAddress) (sdk.Dec, bool, error) { + // Fetch deposits and parse coin denoms + deposit, found := k.GetDeposit(ctx, addr) + if !found { + return sdk.ZeroDec(), false, nil + } + + // Fetch borrow balances and parse coin denoms + borrow, found := k.GetBorrow(ctx, addr) + if !found { + return sdk.ZeroDec(), false, nil + } + + return k.CalculateLtv(ctx, deposit, borrow) +} + +// CalculateLtv calculates the potential LTV given a user's deposits and borrows. +// The boolean returned indicates if the LTV should be added to the store's LTV index. +func (k Keeper) CalculateLtv(ctx sdk.Context, deposit types.Deposit, borrow types.Borrow) (sdk.Dec, bool, error) { + // Load required liquidation data for every deposit/borrow denom + liqMap, err := k.LoadLiquidationData(ctx, deposit, borrow) + if err != nil { + return sdk.ZeroDec(), false, nil + } + + // Build valuation map to hold deposit coin USD valuations + depositCoinValues := types.NewValuationMap() + for _, depCoin := range deposit.Amount { + dData := liqMap[depCoin.Denom] + dCoinUsdValue := sdk.NewDecFromInt(depCoin.Amount).Quo(sdk.NewDecFromInt(dData.conversionFactor)).Mul(dData.price) + depositCoinValues.Increment(depCoin.Denom, dCoinUsdValue) + } + + // Build valuation map to hold borrow coin USD valuations + borrowCoinValues := types.NewValuationMap() + for _, bCoin := range borrow.Amount { + bData := liqMap[bCoin.Denom] + bCoinUsdValue := sdk.NewDecFromInt(bCoin.Amount).Quo(sdk.NewDecFromInt(bData.conversionFactor)).Mul(bData.price) + borrowCoinValues.Increment(bCoin.Denom, bCoinUsdValue) + } + + // User doesn't have any deposits, catch divide by 0 error + sumDeposits := depositCoinValues.Sum() + if sumDeposits.Equal(sdk.ZeroDec()) { + return sdk.ZeroDec(), false, nil + } + + // Loan-to-Value ratio + return borrowCoinValues.Sum().Quo(sumDeposits), true, nil +} + +// LoadLiquidationData returns liquidation data, deposit, borrow +func (k Keeper) LoadLiquidationData(ctx sdk.Context, deposit types.Deposit, borrow types.Borrow) (map[string]LiqData, error) { + liqMap := make(map[string]LiqData) + + borrowDenoms := getDenoms(borrow.Amount) + depositDenoms := getDenoms(deposit.Amount) + denoms := removeDuplicates(borrowDenoms, depositDenoms) + + // Load required liquidation data for every deposit/borrow denom + for _, denom := range denoms { + mm, found := k.GetMoneyMarket(ctx, denom) + if !found { + return liqMap, sdkerrors.Wrapf(types.ErrMarketNotFound, "no market found for denom %s", denom) + + } + + priceData, err := k.pricefeedKeeper.GetCurrentPrice(ctx, mm.SpotMarketID) + if err != nil { + return liqMap, err + } + + liqMap[denom] = LiqData{priceData.Price, mm.BorrowLimit.LoanToValue, mm.ConversionFactor} + } + + return liqMap, nil +} + func getDenoms(coins sdk.Coins) []string { denoms := []string{} for _, coin := range coins { diff --git a/x/hard/keeper/liquidation_test.go b/x/hard/keeper/liquidation_test.go index db8e2f6d..8db6f226 100644 --- a/x/hard/keeper/liquidation_test.go +++ b/x/hard/keeper/liquidation_test.go @@ -412,7 +412,7 @@ func (suite *KeeperTestSuite) TestFullIndexLiquidation() { MaxEndTime: endTime, }, CorrespondingDebt: sdk.NewInt64Coin("debt", 0), - MaxBid: sdk.NewInt64Coin("ukava", 8013492), // TODO: why isn't this 8004766 + MaxBid: sdk.NewInt64Coin("ukava", 8013492), LotReturns: lotReturns, }, }, @@ -449,7 +449,7 @@ func (suite *KeeperTestSuite) TestFullIndexLiquidation() { MaxEndTime: endTime, }, CorrespondingDebt: sdk.NewInt64Coin("debt", 0), - MaxBid: sdk.NewInt64Coin("ukava", 8014873), // TODO: Why isn't this 8013492 + MaxBid: sdk.NewInt64Coin("ukava", 8014873), LotReturns: otherBorrower3LotReturns, }, auctypes.CollateralAuction{