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74f76d125c
0g-chain/x/cdp/keeper/interest_test.go
rustco 9aef8e4971
chore: fix mismatched method comments (#1949) 
Signed-off-by: rustco <ruster@111.com>
2024-06-20 15:09:21 -07:00

748 lines
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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/kava-labs/kava/app"
"github.com/kava-labs/kava/x/cdp/keeper"
"github.com/kava-labs/kava/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)
})
}
}
// TestCalculateCDPInterest 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)
params := suite.keeper.GetParams(suite.ctx)
var ctype types.CollateralParam
for _, cp := range params.CollateralParams {
if cp.Type == tc.args.ctype {
ctype = cp
cp.CheckCollateralizationIndexCount = sdk.NewInt(int64(tc.args.slice))
break
}
}
err = suite.keeper.SynchronizeInterestForRiskyCDPs(suite.ctx, sdk.MaxSortableDec, 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))
}
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