package keeper_test import ( "testing" "time" sdkmath "cosmossdk.io/math" sdk "github.com/cosmos/cosmos-sdk/types" "github.com/stretchr/testify/suite" tmproto "github.com/cometbft/cometbft/proto/tendermint/types" tmtime "github.com/cometbft/cometbft/types/time" "github.com/0glabs/0g-chain/app" "github.com/0glabs/0g-chain/x/cdp/keeper" "github.com/0glabs/0g-chain/x/cdp/types" ) type InterestTestSuite struct { suite.Suite keeper keeper.Keeper app app.TestApp ctx sdk.Context } func (suite *InterestTestSuite) SetupTest() { tApp := app.NewTestApp() ctx := tApp.NewContext(true, tmproto.Header{Height: 1, Time: tmtime.Now()}) cdc := tApp.AppCodec() tApp.InitializeFromGenesisStates( NewPricefeedGenStateMulti(cdc), NewCDPGenStateMulti(cdc), ) keeper := tApp.GetCDPKeeper() suite.app = tApp suite.ctx = ctx suite.keeper = keeper } func (suite *InterestTestSuite) TestCalculateInterestFactor() { type args struct { perSecondInterestRate sdk.Dec timeElapsed sdkmath.Int expectedValue sdk.Dec } type test struct { name string args args } oneYearInSeconds := int64(31536000) testCases := []test{ { "1 year", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("1.191463614477847370"), }, }, { "10 year", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds * 10), expectedValue: sdk.MustNewDecFromStr("5.765113233897391189"), }, }, { "1 month", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds / 12), expectedValue: sdk.MustNewDecFromStr("1.014705619075717373"), }, }, { "1 day", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds / 365), expectedValue: sdk.MustNewDecFromStr("1.000480067194057924"), }, }, { "1 year: low interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("1.017656545925063632"), }, }, { "1 year, lower interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000055"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("1.001735985079841390"), }, }, { "1 year, lowest interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000005"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("1.000157692432076670"), }, }, { "1 year: high interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000055555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("5.766022095987868825"), }, }, { "1 year: higher interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000000555555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("40628388.864535408465693310"), }, }, // If we raise the per second interest rate too much we'll cause an integer overflow. // For example, perSecondInterestRate: '1.000005555555' will cause a panic. { "1 year: highest interest rate", args{ perSecondInterestRate: sdk.MustNewDecFromStr("1.000001555555"), timeElapsed: sdkmath.NewInt(oneYearInSeconds), expectedValue: sdk.MustNewDecFromStr("2017093013158200407564.613502861572552603"), }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { interestFactor := keeper.CalculateInterestFactor(tc.args.perSecondInterestRate, tc.args.timeElapsed) suite.Require().Equal(tc.args.expectedValue, interestFactor) }) } } func (suite *InterestTestSuite) TestAccumulateInterest() { type args struct { ctype string initialTime time.Time totalPrincipal sdkmath.Int timeElapsed int expectedTotalPrincipal sdkmath.Int expectedLastAccrualTime time.Time } type test struct { name string args args } oneYearInSeconds := 31536000 testCases := []test{ { "1 year", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(100000000000000), timeElapsed: oneYearInSeconds, expectedTotalPrincipal: sdkmath.NewInt(105000000000012), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * oneYearInSeconds)), }, }, { "1 year - zero principal", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdk.ZeroInt(), timeElapsed: oneYearInSeconds, expectedTotalPrincipal: sdk.ZeroInt(), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * oneYearInSeconds)), }, }, { "1 month", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(100000000000000), timeElapsed: 86400 * 30, expectedTotalPrincipal: sdkmath.NewInt(100401820189198), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 86400 * 30)), }, }, { "1 month - interest rounds to zero", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(10), timeElapsed: 86400 * 30, expectedTotalPrincipal: sdkmath.NewInt(10), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), }, }, { "7 seconds", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(100000000000000), timeElapsed: 7, expectedTotalPrincipal: sdkmath.NewInt(100000001082988), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7)), }, }, { "7 seconds - interest rounds to zero", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(30000000), timeElapsed: 7, expectedTotalPrincipal: sdkmath.NewInt(30000000), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), }, }, { "7 seconds - zero interest", args{ ctype: "busd-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), totalPrincipal: sdkmath.NewInt(100000000000000), timeElapsed: 7, expectedTotalPrincipal: sdkmath.NewInt(100000000000000), expectedLastAccrualTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7)), }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { suite.ctx = suite.ctx.WithBlockTime(tc.args.initialTime) suite.keeper.SetTotalPrincipal(suite.ctx, tc.args.ctype, types.DefaultStableDenom, tc.args.totalPrincipal) suite.keeper.SetPreviousAccrualTime(suite.ctx, tc.args.ctype, suite.ctx.BlockTime()) suite.keeper.SetInterestFactor(suite.ctx, tc.args.ctype, sdk.OneDec()) updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.timeElapsed)) suite.ctx = suite.ctx.WithBlockTime(updatedBlockTime) err := suite.keeper.AccumulateInterest(suite.ctx, tc.args.ctype) suite.Require().NoError(err) actualTotalPrincipal := suite.keeper.GetTotalPrincipal(suite.ctx, tc.args.ctype, types.DefaultStableDenom) suite.Require().Equal(tc.args.expectedTotalPrincipal, actualTotalPrincipal) actualAccrualTime, _ := suite.keeper.GetPreviousAccrualTime(suite.ctx, tc.args.ctype) suite.Require().Equal(tc.args.expectedLastAccrualTime, actualAccrualTime) }) } } // TestSynchronizeInterest tests the functionality of synchronizing the accumulated interest for CDPs func (suite *InterestTestSuite) TestSynchronizeInterest() { type args struct { ctype string initialTime time.Time initialCollateral sdk.Coin initialPrincipal sdk.Coin timeElapsed int expectedFees sdk.Coin expectedFeesUpdatedTime time.Time } type test struct { name string args args } oneYearInSeconds := 31536000 testCases := []test{ { "1 year", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: oneYearInSeconds, expectedFees: c("usdx", 5000000000), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * oneYearInSeconds)), }, }, { "1 month", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: 86400 * 30, expectedFees: c("usdx", 401820189), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 86400 * 30)), }, }, { "7 seconds", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: 7, expectedFees: c("usdx", 1083), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7)), }, }, { "7 seconds - zero apy", args{ ctype: "busd-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("busd", 10000000000000), initialPrincipal: c("usdx", 10000000000), timeElapsed: 7, expectedFees: c("usdx", 0), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7)), }, }, { "7 seconds - fees round to zero", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000), initialPrincipal: c("usdx", 10000000), timeElapsed: 7, expectedFees: c("usdx", 0), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { suite.SetupTest() suite.ctx = suite.ctx.WithBlockTime(tc.args.initialTime) // setup account state _, addrs := app.GeneratePrivKeyAddressPairs(1) ak := suite.app.GetAccountKeeper() // setup the first account acc := ak.NewAccountWithAddress(suite.ctx, addrs[0]) ak.SetAccount(suite.ctx, acc) bk := suite.app.GetBankKeeper() err := bk.MintCoins(suite.ctx, types.ModuleName, cs(tc.args.initialCollateral)) suite.Require().NoError(err) err = bk.SendCoinsFromModuleToAccount(suite.ctx, types.ModuleName, addrs[0], cs(tc.args.initialCollateral)) suite.Require().NoError(err) // setup pricefeed pk := suite.app.GetPriceFeedKeeper() _, err = pk.SetPrice(suite.ctx, sdk.AccAddress{}, "bnb:usd", d("17.25"), tc.args.expectedFeesUpdatedTime.Add(time.Second)) suite.NoError(err) _, err = pk.SetPrice(suite.ctx, sdk.AccAddress{}, "busd:usd", d("1"), tc.args.expectedFeesUpdatedTime.Add(time.Second)) suite.NoError(err) // setup cdp state suite.keeper.SetPreviousAccrualTime(suite.ctx, tc.args.ctype, suite.ctx.BlockTime()) suite.keeper.SetInterestFactor(suite.ctx, tc.args.ctype, sdk.OneDec()) err = suite.keeper.AddCdp(suite.ctx, addrs[0], tc.args.initialCollateral, tc.args.initialPrincipal, tc.args.ctype) suite.Require().NoError(err) updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.timeElapsed)) suite.ctx = suite.ctx.WithBlockTime(updatedBlockTime) err = suite.keeper.AccumulateInterest(suite.ctx, tc.args.ctype) suite.Require().NoError(err) cdp, found := suite.keeper.GetCDP(suite.ctx, tc.args.ctype, 1) suite.Require().True(found) cdp = suite.keeper.SynchronizeInterest(suite.ctx, cdp) suite.Require().Equal(tc.args.expectedFees, cdp.AccumulatedFees) suite.Require().Equal(tc.args.expectedFeesUpdatedTime, cdp.FeesUpdated) }) } } func (suite *InterestTestSuite) TestMultipleCDPInterest() { type args struct { ctype string initialTime time.Time blockInterval int numberOfBlocks int initialCDPCollateral sdk.Coin initialCDPPrincipal sdk.Coin numberOfCdps int expectedFeesPerCDP sdk.Coin expectedTotalPrincipalPerCDP sdk.Coin expectedFeesUpdatedTime time.Time expectedTotalPrincipal sdkmath.Int expectedDebtBalance sdkmath.Int expectedStableBalance sdkmath.Int expectedSumOfCDPPrincipal sdkmath.Int } type test struct { name string args args } testCases := []test{ { "1 block", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), blockInterval: 7, numberOfBlocks: 1, initialCDPCollateral: c("bnb", 10000000000), initialCDPPrincipal: c("usdx", 500000000), numberOfCdps: 100, expectedFeesPerCDP: c("usdx", 5), expectedTotalPrincipalPerCDP: c("usdx", 500000005), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7)), expectedTotalPrincipal: i(50000000541), expectedDebtBalance: i(50000000541), expectedStableBalance: i(50000000541), expectedSumOfCDPPrincipal: i(50000000500), }, }, { "100 blocks", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), blockInterval: 7, numberOfBlocks: 100, initialCDPCollateral: c("bnb", 10000000000), initialCDPPrincipal: c("usdx", 500000000), numberOfCdps: 100, expectedFeesPerCDP: c("usdx", 541), expectedTotalPrincipalPerCDP: c("usdx", 500000541), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7 * 100)), expectedTotalPrincipal: i(50000054100), expectedDebtBalance: i(50000054100), expectedStableBalance: i(50000054100), expectedSumOfCDPPrincipal: i(50000054100), }, }, { "10000 blocks", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), blockInterval: 7, numberOfBlocks: 10000, initialCDPCollateral: c("bnb", 10000000000), initialCDPPrincipal: c("usdx", 500000000), numberOfCdps: 100, expectedFeesPerCDP: c("usdx", 54152), expectedTotalPrincipalPerCDP: c("usdx", 500054152), expectedFeesUpdatedTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC).Add(time.Duration(int(time.Second) * 7 * 10000)), expectedTotalPrincipal: i(50005418990), expectedDebtBalance: i(50005418990), expectedStableBalance: i(50005418990), expectedSumOfCDPPrincipal: i(50005415200), }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { suite.SetupTest() suite.ctx = suite.ctx.WithBlockTime(tc.args.initialTime) // setup pricefeed pk := suite.app.GetPriceFeedKeeper() _, err := pk.SetPrice(suite.ctx, sdk.AccAddress{}, "bnb:usd", d("17.25"), tc.args.expectedFeesUpdatedTime.Add(time.Second)) suite.NoError(err) // setup cdp state suite.keeper.SetPreviousAccrualTime(suite.ctx, tc.args.ctype, suite.ctx.BlockTime()) suite.keeper.SetInterestFactor(suite.ctx, tc.args.ctype, sdk.OneDec()) // setup account state _, addrs := app.GeneratePrivKeyAddressPairs(tc.args.numberOfCdps) for j := 0; j < tc.args.numberOfCdps; j++ { ak := suite.app.GetAccountKeeper() // setup the first account acc := ak.NewAccountWithAddress(suite.ctx, addrs[j]) ak.SetAccount(suite.ctx, acc) bk := suite.app.GetBankKeeper() err := bk.MintCoins(suite.ctx, types.ModuleName, cs(tc.args.initialCDPCollateral)) suite.Require().NoError(err) err = bk.SendCoinsFromModuleToAccount(suite.ctx, types.ModuleName, addrs[j], cs(tc.args.initialCDPCollateral)) suite.Require().NoError(err) err = suite.keeper.AddCdp(suite.ctx, addrs[j], tc.args.initialCDPCollateral, tc.args.initialCDPPrincipal, tc.args.ctype) suite.Require().NoError(err) } // run a number of blocks where CDPs are not synchronized for j := 0; j < tc.args.numberOfBlocks; j++ { updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.blockInterval)) suite.ctx = suite.ctx.WithBlockTime(updatedBlockTime) err := suite.keeper.AccumulateInterest(suite.ctx, tc.args.ctype) suite.Require().NoError(err) } bk := suite.app.GetBankKeeper() debtSupply := bk.GetSupply(suite.ctx, types.DefaultDebtDenom) usdxSupply := bk.GetSupply(suite.ctx, types.DefaultStableDenom) totalPrincipal := suite.keeper.GetTotalPrincipal(suite.ctx, tc.args.ctype, types.DefaultStableDenom) suite.Require().Equal(tc.args.expectedDebtBalance, debtSupply.Amount) suite.Require().Equal(tc.args.expectedStableBalance, usdxSupply.Amount) suite.Require().Equal(tc.args.expectedTotalPrincipal, totalPrincipal) sumOfCDPPrincipal := sdk.ZeroInt() for j := 0; j < tc.args.numberOfCdps; j++ { cdp, found := suite.keeper.GetCDP(suite.ctx, tc.args.ctype, uint64(j+1)) suite.Require().True(found) cdp = suite.keeper.SynchronizeInterest(suite.ctx, cdp) suite.Require().Equal(tc.args.expectedFeesPerCDP, cdp.AccumulatedFees) suite.Require().Equal(tc.args.expectedTotalPrincipalPerCDP, cdp.GetTotalPrincipal()) suite.Require().Equal(tc.args.expectedFeesUpdatedTime, cdp.FeesUpdated) sumOfCDPPrincipal = sumOfCDPPrincipal.Add(cdp.GetTotalPrincipal().Amount) } suite.Require().Equal(tc.args.expectedSumOfCDPPrincipal, sumOfCDPPrincipal) }) } } // TestSynchronizeInterest tests the functionality of synchronizing the accumulated interest for CDPs func (suite *InterestTestSuite) TestCalculateCDPInterest() { type args struct { ctype string initialTime time.Time initialCollateral sdk.Coin initialPrincipal sdk.Coin timeElapsed int expectedFees sdk.Coin } type test struct { name string args args } oneYearInSeconds := 31536000 testCases := []test{ { "1 year", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: oneYearInSeconds, expectedFees: c("usdx", 5000000000), }, }, { "1 month", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: 86400 * 30, expectedFees: c("usdx", 401820189), }, }, { "7 seconds", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000000), initialPrincipal: c("usdx", 100000000000), timeElapsed: 7, expectedFees: c("usdx", 1083), }, }, { "7 seconds - fees round to zero", args{ ctype: "bnb-a", initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), initialCollateral: c("bnb", 1000000000), initialPrincipal: c("usdx", 10000000), timeElapsed: 7, expectedFees: c("usdx", 0), }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { suite.SetupTest() suite.ctx = suite.ctx.WithBlockTime(tc.args.initialTime) // setup account state _, addrs := app.GeneratePrivKeyAddressPairs(1) ak := suite.app.GetAccountKeeper() // setup the first account acc := ak.NewAccountWithAddress(suite.ctx, addrs[0]) ak.SetAccount(suite.ctx, acc) bk := suite.app.GetBankKeeper() err := bk.MintCoins(suite.ctx, types.ModuleName, cs(tc.args.initialCollateral)) suite.Require().NoError(err) err = bk.SendCoinsFromModuleToAccount(suite.ctx, types.ModuleName, addrs[0], cs(tc.args.initialCollateral)) suite.Require().NoError(err) // setup pricefeed pk := suite.app.GetPriceFeedKeeper() _, err = pk.SetPrice(suite.ctx, sdk.AccAddress{}, "bnb:usd", d("17.25"), tc.args.initialTime.Add(time.Duration(int(time.Second)*tc.args.timeElapsed))) suite.Require().NoError(err) // setup cdp state suite.keeper.SetPreviousAccrualTime(suite.ctx, tc.args.ctype, suite.ctx.BlockTime()) suite.keeper.SetInterestFactor(suite.ctx, tc.args.ctype, sdk.OneDec()) err = suite.keeper.AddCdp(suite.ctx, addrs[0], tc.args.initialCollateral, tc.args.initialPrincipal, tc.args.ctype) suite.Require().NoError(err) updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.timeElapsed)) suite.ctx = suite.ctx.WithBlockTime(updatedBlockTime) err = suite.keeper.AccumulateInterest(suite.ctx, tc.args.ctype) suite.Require().NoError(err) cdp, found := suite.keeper.GetCDP(suite.ctx, tc.args.ctype, 1) suite.Require().True(found) newInterest := suite.keeper.CalculateNewInterest(suite.ctx, cdp) suite.Require().Equal(tc.args.expectedFees, newInterest) }) } } func (suite *InterestTestSuite) TestSyncInterestForRiskyCDPs() { type args struct { ctype string numberCdps int slice int initialCollateral sdk.Coin minPrincipal sdk.Coin principalIncrement sdk.Coin initialTime time.Time timeElapsed int expectedCDPs int } type test struct { name string args args } oneYearInSeconds := 31536000 testCases := []test{ { "1 year", args{ ctype: "bnb-a", numberCdps: 20, slice: 10, initialCollateral: c("bnb", 100000000000), minPrincipal: c("usdx", 100000000), principalIncrement: c("usdx", 10000000), initialTime: time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), timeElapsed: oneYearInSeconds, expectedCDPs: 10, }, }, } for _, tc := range testCases { suite.Run(tc.name, func() { suite.SetupTest() suite.ctx = suite.ctx.WithBlockTime(tc.args.initialTime) // setup account state _, addrs := app.GeneratePrivKeyAddressPairs(tc.args.numberCdps) ak := suite.app.GetAccountKeeper() bk := suite.app.GetBankKeeper() for _, addr := range addrs { acc := ak.NewAccountWithAddress(suite.ctx, addr) ak.SetAccount(suite.ctx, acc) err := bk.MintCoins(suite.ctx, types.ModuleName, cs(tc.args.initialCollateral)) suite.Require().NoError(err) err = bk.SendCoinsFromModuleToAccount(suite.ctx, types.ModuleName, addr, cs(tc.args.initialCollateral)) suite.Require().NoError(err) } // setup pricefeed pk := suite.app.GetPriceFeedKeeper() _, err := pk.SetPrice(suite.ctx, sdk.AccAddress{}, "bnb:usd", d("20.0"), tc.args.initialTime.Add(time.Duration(int(time.Second)*tc.args.timeElapsed))) suite.Require().NoError(err) // setup cdp state suite.keeper.SetPreviousAccrualTime(suite.ctx, tc.args.ctype, suite.ctx.BlockTime()) suite.keeper.SetInterestFactor(suite.ctx, tc.args.ctype, sdk.OneDec()) for j, addr := range addrs { initialPrincipal := tc.args.minPrincipal.Add(c("usdx", int64(j)*tc.args.principalIncrement.Amount.Int64())) err := suite.keeper.AddCdp(suite.ctx, addr, tc.args.initialCollateral, initialPrincipal, tc.args.ctype) suite.Require().NoError(err) } updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.timeElapsed)) suite.ctx = suite.ctx.WithBlockTime(updatedBlockTime) err = suite.keeper.AccumulateInterest(suite.ctx, tc.args.ctype) suite.Require().NoError(err) err = suite.keeper.SynchronizeInterestForRiskyCDPs(suite.ctx, i(int64(tc.args.slice)), sdk.MaxSortableDec, tc.args.ctype) suite.Require().NoError(err) cdpsUpdatedCount := 0 for _, addr := range addrs { cdp, found := suite.keeper.GetCdpByOwnerAndCollateralType(suite.ctx, addr, tc.args.ctype) suite.Require().True(found) if cdp.FeesUpdated.Equal(suite.ctx.BlockTime()) { cdpsUpdatedCount += 1 } } suite.Require().Equal(tc.args.expectedCDPs, cdpsUpdatedCount) }) } } func TestInterestTestSuite(t *testing.T) { suite.Run(t, new(InterestTestSuite)) }