2020-12-03 21:50:35 +00:00
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package keeper_test
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import (
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"testing"
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"time"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/stretchr/testify/suite"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/tendermint/tendermint/crypto"
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tmtime "github.com/tendermint/tendermint/types/time"
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"github.com/kava-labs/kava/app"
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"github.com/kava-labs/kava/x/harvest"
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"github.com/kava-labs/kava/x/harvest/types"
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"github.com/kava-labs/kava/x/pricefeed"
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)
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type InterestTestSuite struct {
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suite.Suite
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}
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func (suite *InterestTestSuite) TestCalculateUtilizationRatio() {
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type args struct {
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cash sdk.Dec
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borrows sdk.Dec
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reserves sdk.Dec
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expectedValue sdk.Dec
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}
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type test struct {
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name string
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args args
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}
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testCases := []test{
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{
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"normal",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("100"),
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expectedValue: sdk.MustNewDecFromStr("0.847457627118644068"),
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},
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},
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{
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"high util ratio",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("250000"),
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reserves: sdk.MustNewDecFromStr("100"),
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expectedValue: sdk.MustNewDecFromStr("0.996412913511359107"),
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},
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},
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{
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"very high util ratio",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("250000000000"),
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reserves: sdk.MustNewDecFromStr("100"),
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expectedValue: sdk.MustNewDecFromStr("0.999999996400000013"),
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},
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},
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{
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"low util ratio",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("50"),
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reserves: sdk.MustNewDecFromStr("100"),
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expectedValue: sdk.MustNewDecFromStr("0.052631578947368421"),
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},
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},
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{
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"very low util ratio",
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args{
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cash: sdk.MustNewDecFromStr("10000000"),
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borrows: sdk.MustNewDecFromStr("50"),
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reserves: sdk.MustNewDecFromStr("100"),
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expectedValue: sdk.MustNewDecFromStr("0.000005000025000125"),
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},
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},
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}
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for _, tc := range testCases {
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suite.Run(tc.name, func() {
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utilRatio := harvest.CalculateUtilizationRatio(tc.args.cash, tc.args.borrows, tc.args.reserves)
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suite.Require().Equal(tc.args.expectedValue, utilRatio)
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})
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}
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}
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func (suite *InterestTestSuite) TestCalculateBorrowRate() {
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type args struct {
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cash sdk.Dec
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borrows sdk.Dec
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reserves sdk.Dec
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model types.InterestRateModel
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expectedValue sdk.Dec
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}
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type test struct {
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name string
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args args
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}
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// Normal model has:
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// - BaseRateAPY: 0.0
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// - BaseMultiplier: 0.1
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// - Kink: 0.8
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// - JumpMultiplier: 0.5
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normalModel := types.NewInterestRateModel(sdk.MustNewDecFromStr("0"), sdk.MustNewDecFromStr("0.1"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("0.5"))
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testCases := []test{
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{
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"normal no jump",
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args{
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cash: sdk.MustNewDecFromStr("5000"),
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borrows: sdk.MustNewDecFromStr("1000"),
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reserves: sdk.MustNewDecFromStr("1000"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.020000000000000000"),
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},
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},
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{
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"normal with jump",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("100"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.103728813559322034"),
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},
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},
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{
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"high cash",
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args{
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cash: sdk.MustNewDecFromStr("10000000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("100"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.000049975511999120"),
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},
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},
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{
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"high borrows",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000000000000"),
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reserves: sdk.MustNewDecFromStr("100"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.179999999910000000"),
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},
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},
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{
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"high reserves",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("1000000000000"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.180000000000000000"),
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},
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},
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{
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"random numbers",
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args{
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cash: sdk.MustNewDecFromStr("125"),
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borrows: sdk.MustNewDecFromStr("11"),
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reserves: sdk.MustNewDecFromStr("82"),
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model: normalModel,
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expectedValue: sdk.MustNewDecFromStr("0.020370370370370370"),
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},
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},
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{
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"increased base multiplier",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("100"),
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model: types.NewInterestRateModel(sdk.MustNewDecFromStr("0"), sdk.MustNewDecFromStr("0.5"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("1.0")),
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expectedValue: sdk.MustNewDecFromStr("0.447457627118644068"),
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},
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},
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{
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"decreased kink",
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args{
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cash: sdk.MustNewDecFromStr("1000"),
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borrows: sdk.MustNewDecFromStr("5000"),
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reserves: sdk.MustNewDecFromStr("100"),
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model: types.NewInterestRateModel(sdk.MustNewDecFromStr("0"), sdk.MustNewDecFromStr("0.5"), sdk.MustNewDecFromStr("0.1"), sdk.MustNewDecFromStr("1.0")),
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expectedValue: sdk.MustNewDecFromStr("0.797457627118644068"),
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},
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},
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}
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for _, tc := range testCases {
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suite.Run(tc.name, func() {
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borrowRate, err := harvest.CalculateBorrowRate(tc.args.model, tc.args.cash, tc.args.borrows, tc.args.reserves)
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suite.Require().NoError(err)
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suite.Require().Equal(tc.args.expectedValue, borrowRate)
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})
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}
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}
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func (suite *InterestTestSuite) TestCalculateInterestFactor() {
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type args struct {
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perSecondInterestRate sdk.Dec
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timeElapsed sdk.Int
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expectedValue sdk.Dec
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}
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type test struct {
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name string
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args args
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}
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oneYearInSeconds := int64(31536000)
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testCases := []test{
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{
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"1 year",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("1.191463614477847370"),
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},
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},
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{
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"10 year",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds * 10),
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expectedValue: sdk.MustNewDecFromStr("5.765113233897391189"),
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},
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},
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{
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"1 month",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds / 12),
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expectedValue: sdk.MustNewDecFromStr("1.014705619075717373"),
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},
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},
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{
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"1 day",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000005555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds / 365),
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expectedValue: sdk.MustNewDecFromStr("1.000480067194057924"),
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},
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},
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{
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"1 year: low interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("1.017656545925063632"),
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},
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},
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{
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"1 year, lower interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000055"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("1.001735985079841390"),
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},
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},
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{
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"1 year, lowest interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000000005"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("1.000157692432076670"),
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},
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},
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{
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"1 year: high interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000055555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("5.766022095987868825"),
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},
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},
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{
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"1 year: higher interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000000555555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("40628388.864535408465693310"),
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},
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},
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// If we raise the per second interest rate too much we'll cause an integer overflow.
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// For example, perSecondInterestRate: '1.000005555555' will cause a panic.
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{
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"1 year: highest interest rate",
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args{
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perSecondInterestRate: sdk.MustNewDecFromStr("1.000001555555"),
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timeElapsed: sdk.NewInt(oneYearInSeconds),
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expectedValue: sdk.MustNewDecFromStr("2017093013158200407564.613502861572552603"),
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},
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},
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}
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for _, tc := range testCases {
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interestFactor := harvest.CalculateInterestFactor(tc.args.perSecondInterestRate, tc.args.timeElapsed)
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suite.Require().Equal(tc.args.expectedValue, interestFactor)
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}
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}
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func (suite *InterestTestSuite) TestAPYToSPY() {
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type args struct {
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apy sdk.Dec
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expectedValue sdk.Dec
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}
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type test struct {
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name string
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args args
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expectError bool
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}
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testCases := []test{
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{
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"lowest apy",
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args{
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apy: sdk.MustNewDecFromStr("0.005"),
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expectedValue: sdk.MustNewDecFromStr("0.999999831991472557"),
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},
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|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"lower apy",
|
|
|
|
|
args{
|
|
|
|
|
apy: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedValue: sdk.MustNewDecFromStr("0.999999905005957279"),
|
|
|
|
|
},
|
|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"medium-low apy",
|
|
|
|
|
args{
|
|
|
|
|
apy: sdk.MustNewDecFromStr("0.5"),
|
|
|
|
|
expectedValue: sdk.MustNewDecFromStr("0.999999978020447332"),
|
|
|
|
|
},
|
|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"medium-high apy",
|
|
|
|
|
args{
|
|
|
|
|
apy: sdk.MustNewDecFromStr("5"),
|
|
|
|
|
expectedValue: sdk.MustNewDecFromStr("1.000000051034942717"),
|
|
|
|
|
},
|
|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"high apy",
|
|
|
|
|
args{
|
|
|
|
|
apy: sdk.MustNewDecFromStr("50"),
|
|
|
|
|
expectedValue: sdk.MustNewDecFromStr("1.000000124049443433"),
|
|
|
|
|
},
|
|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"highest apy",
|
|
|
|
|
args{
|
2020-12-03 23:05:56 +00:00
|
|
|
apy: sdk.MustNewDecFromStr("177"),
|
|
|
|
|
expectedValue: sdk.MustNewDecFromStr("1.000002441641340532"),
|
2020-12-03 21:50:35 +00:00
|
|
|
},
|
|
|
|
|
false,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"out of bounds error after 178",
|
|
|
|
|
args{
|
|
|
|
|
apy: sdk.MustNewDecFromStr("178"),
|
|
|
|
|
expectedValue: sdk.ZeroDec(),
|
|
|
|
|
},
|
|
|
|
|
true,
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for _, tc := range testCases {
|
|
|
|
|
suite.Run(tc.name, func() {
|
|
|
|
|
spy, err := harvest.APYToSPY(tc.args.apy)
|
|
|
|
|
if tc.expectError {
|
|
|
|
|
suite.Require().Error(err)
|
|
|
|
|
} else {
|
|
|
|
|
suite.Require().NoError(err)
|
|
|
|
|
suite.Require().Equal(tc.args.expectedValue, spy)
|
|
|
|
|
}
|
|
|
|
|
})
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
type ExpectedInterest struct {
|
|
|
|
|
elapsedTime int64
|
|
|
|
|
shouldBorrow bool
|
|
|
|
|
borrowCoin sdk.Coin
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func (suite *KeeperTestSuite) TestInterest() {
|
|
|
|
|
type args struct {
|
|
|
|
|
user sdk.AccAddress
|
|
|
|
|
initialBorrowerCoins sdk.Coins
|
|
|
|
|
initialModuleCoins sdk.Coins
|
|
|
|
|
borrowCoinDenom string
|
|
|
|
|
borrowCoins sdk.Coins
|
|
|
|
|
interestRateModel types.InterestRateModel
|
|
|
|
|
reserveFactor sdk.Dec
|
|
|
|
|
expectedInterestSnaphots []ExpectedInterest
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
type errArgs struct {
|
|
|
|
|
expectPass bool
|
|
|
|
|
contains string
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
type interestTest struct {
|
|
|
|
|
name string
|
|
|
|
|
args args
|
|
|
|
|
errArgs errArgs
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
normalModel := types.NewInterestRateModel(sdk.MustNewDecFromStr("0"), sdk.MustNewDecFromStr("0.1"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("0.5"))
|
|
|
|
|
|
|
|
|
|
oneDayInSeconds := int64(86400)
|
|
|
|
|
oneWeekInSeconds := int64(604800)
|
|
|
|
|
oneMonthInSeconds := int64(2592000)
|
|
|
|
|
oneYearInSeconds := int64(31536000)
|
|
|
|
|
|
|
|
|
|
testCases := []interestTest{
|
|
|
|
|
{
|
|
|
|
|
"one day",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneDayInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"one week",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneWeekInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"one month",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneMonthInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"one year",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneYearInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"0 reserve factor",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneYearInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"borrow during snapshot",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneYearInSeconds,
|
|
|
|
|
shouldBorrow: true,
|
|
|
|
|
borrowCoin: sdk.NewCoin("ukava", sdk.NewInt(1*KAVA_CF)),
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"multiple snapshots",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneMonthInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneMonthInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
"varied snapshots",
|
|
|
|
|
args{
|
|
|
|
|
user: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
|
|
|
|
|
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))),
|
|
|
|
|
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF))),
|
|
|
|
|
borrowCoinDenom: "ukava",
|
|
|
|
|
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(20*KAVA_CF))),
|
|
|
|
|
interestRateModel: normalModel,
|
|
|
|
|
reserveFactor: sdk.MustNewDecFromStr("0.05"),
|
|
|
|
|
expectedInterestSnaphots: []ExpectedInterest{
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneDayInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneWeekInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneMonthInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
elapsedTime: oneYearInSeconds,
|
|
|
|
|
shouldBorrow: false,
|
|
|
|
|
borrowCoin: sdk.Coin{},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
errArgs{
|
|
|
|
|
expectPass: true,
|
|
|
|
|
contains: "",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
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.user},
|
|
|
|
|
[]sdk.Coins{tc.args.initialBorrowerCoins},
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
// 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())}),
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|
time.Hour*24,
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|
|
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|
),
|
|
|
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|
},
|
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|
|
types.MoneyMarkets{
|
|
|
|
|
types.NewMoneyMarket("ukava",
|
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|
|
|
types.NewBorrowLimit(false, sdk.NewDec(100000000*KAVA_CF), sdk.MustNewDecFromStr("0.8")), // Borrow Limit
|
2020-12-15 17:38:14 +00:00
|
|
|
"kava:usd", // Market ID
|
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|
|
|
sdk.NewInt(KAVA_CF), // Conversion Factor
|
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|
sdk.NewInt(USDX_CF*1000), // Auction Size
|
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|
|
|
tc.args.interestRateModel, // Interest Rate Model
|
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|
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|
tc.args.reserveFactor, // Reserve Factor
|
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|
|
sdk.ZeroDec()), // Keeper Reward Percentage
|
2020-12-03 21:50:35 +00:00
|
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|
},
|
2020-12-18 01:12:48 +00:00
|
|
|
0, // LTV counter
|
2020-12-03 21:50:35 +00:00
|
|
|
), types.DefaultPreviousBlockTime, types.DefaultDistributionTimes)
|
|
|
|
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|
|
|
|
|
// Pricefeed module genesis state
|
|
|
|
|
pricefeedGS := pricefeed.GenesisState{
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|
|
|
Params: pricefeed.Params{
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|
|
|
Markets: []pricefeed.Market{
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|
|
{MarketID: "kava:usd", BaseAsset: "kava", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
PostedPrices: []pricefeed.PostedPrice{
|
|
|
|
|
{
|
|
|
|
|
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)
|
|
|
|
|
|
|
|
|
|
keeper := tApp.GetHarvestKeeper()
|
|
|
|
|
suite.app = tApp
|
|
|
|
|
suite.ctx = ctx
|
|
|
|
|
suite.keeper = keeper
|
|
|
|
|
|
|
|
|
|
var err error
|
|
|
|
|
|
|
|
|
|
// Run begin blocker and store initial block time
|
|
|
|
|
harvest.BeginBlocker(suite.ctx, suite.keeper)
|
|
|
|
|
|
|
|
|
|
// Deposit 2x as many coins for each coin we intend to borrow
|
2020-12-18 16:05:21 +00:00
|
|
|
depositCoins := sdk.NewCoins()
|
|
|
|
|
for _, borrowCoin := range tc.args.borrowCoins {
|
|
|
|
|
depositCoins = depositCoins.Add(sdk.NewCoin(borrowCoin.Denom, borrowCoin.Amount.Mul(sdk.NewInt(2))))
|
2020-12-03 21:50:35 +00:00
|
|
|
}
|
2020-12-18 16:05:21 +00:00
|
|
|
err = suite.keeper.Deposit(suite.ctx, tc.args.user, depositCoins)
|
|
|
|
|
suite.Require().NoError(err)
|
2020-12-03 21:50:35 +00:00
|
|
|
|
|
|
|
|
// Borrow coins
|
|
|
|
|
err = suite.keeper.Borrow(suite.ctx, tc.args.user, tc.args.borrowCoins)
|
|
|
|
|
suite.Require().NoError(err)
|
|
|
|
|
|
|
|
|
|
// Check that the initial module-level borrow balance is correct and store it
|
|
|
|
|
initialBorrowedCoins, _ := suite.keeper.GetBorrowedCoins(suite.ctx)
|
|
|
|
|
suite.Require().Equal(tc.args.borrowCoins, initialBorrowedCoins)
|
|
|
|
|
|
|
|
|
|
// Check interest levels for each snapshot
|
|
|
|
|
prevCtx := suite.ctx
|
|
|
|
|
for _, snapshot := range tc.args.expectedInterestSnaphots {
|
|
|
|
|
// ---------------------------- Calculate expected interest ----------------------------
|
|
|
|
|
// 1. Get cash, borrows, reserves, and borrow index
|
|
|
|
|
cashPrior := suite.getModuleAccountAtCtx(types.ModuleName, prevCtx).GetCoins().AmountOf(tc.args.borrowCoinDenom)
|
|
|
|
|
|
|
|
|
|
borrowCoinsPrior, borrowCoinsPriorFound := suite.keeper.GetBorrowedCoins(prevCtx)
|
|
|
|
|
suite.Require().True(borrowCoinsPriorFound)
|
|
|
|
|
borrowCoinPriorAmount := borrowCoinsPrior.AmountOf(tc.args.borrowCoinDenom)
|
|
|
|
|
|
|
|
|
|
reservesPrior, foundReservesPrior := suite.keeper.GetTotalReserves(prevCtx, tc.args.borrowCoinDenom)
|
|
|
|
|
if !foundReservesPrior {
|
|
|
|
|
reservesPrior = sdk.NewCoin(tc.args.borrowCoinDenom, sdk.ZeroInt())
|
|
|
|
|
}
|
|
|
|
|
|
2020-12-21 17:07:02 +00:00
|
|
|
interestFactorPrior, foundInterestFactorPrior := suite.keeper.GetInterestFactor(prevCtx, tc.args.borrowCoinDenom)
|
|
|
|
|
suite.Require().True(foundInterestFactorPrior)
|
2020-12-03 21:50:35 +00:00
|
|
|
|
|
|
|
|
// 2. Calculate expected interest owed
|
|
|
|
|
borrowRateApy, err := harvest.CalculateBorrowRate(tc.args.interestRateModel, sdk.NewDecFromInt(cashPrior), sdk.NewDecFromInt(borrowCoinPriorAmount), sdk.NewDecFromInt(reservesPrior.Amount))
|
|
|
|
|
suite.Require().NoError(err)
|
|
|
|
|
|
|
|
|
|
// Convert from APY to SPY, expressed as (1 + borrow rate)
|
|
|
|
|
borrowRateSpy, err := harvest.APYToSPY(sdk.OneDec().Add(borrowRateApy))
|
|
|
|
|
suite.Require().NoError(err)
|
|
|
|
|
|
|
|
|
|
interestFactor := harvest.CalculateInterestFactor(borrowRateSpy, sdk.NewInt(snapshot.elapsedTime))
|
|
|
|
|
expectedInterest := (interestFactor.Mul(sdk.NewDecFromInt(borrowCoinPriorAmount)).TruncateInt()).Sub(borrowCoinPriorAmount)
|
|
|
|
|
expectedReserves := reservesPrior.Add(sdk.NewCoin(tc.args.borrowCoinDenom, sdk.NewDecFromInt(expectedInterest).Mul(tc.args.reserveFactor).TruncateInt()))
|
2020-12-21 17:07:02 +00:00
|
|
|
expectedInterestFactor := interestFactorPrior.Mul(interestFactor)
|
2020-12-03 21:50:35 +00:00
|
|
|
// -------------------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
// Set up snapshot chain context and run begin blocker
|
|
|
|
|
runAtTime := time.Unix(prevCtx.BlockTime().Unix()+(snapshot.elapsedTime), 0)
|
|
|
|
|
snapshotCtx := prevCtx.WithBlockTime(runAtTime)
|
|
|
|
|
harvest.BeginBlocker(snapshotCtx, suite.keeper)
|
|
|
|
|
|
|
|
|
|
// Check that the total amount of borrowed coins has increased by expected interest amount
|
|
|
|
|
expectedBorrowedCoins := borrowCoinsPrior.AmountOf(tc.args.borrowCoinDenom).Add(expectedInterest)
|
|
|
|
|
currBorrowedCoins, _ := suite.keeper.GetBorrowedCoins(snapshotCtx)
|
|
|
|
|
suite.Require().Equal(expectedBorrowedCoins, currBorrowedCoins.AmountOf(tc.args.borrowCoinDenom))
|
|
|
|
|
|
|
|
|
|
// Check that the total reserves have changed as expected
|
|
|
|
|
currTotalReserves, _ := suite.keeper.GetTotalReserves(snapshotCtx, tc.args.borrowCoinDenom)
|
|
|
|
|
suite.Require().Equal(expectedReserves, currTotalReserves)
|
|
|
|
|
|
|
|
|
|
// Check that the borrow index has increased as expected
|
2020-12-21 17:07:02 +00:00
|
|
|
currIndexPrior, _ := suite.keeper.GetInterestFactor(snapshotCtx, tc.args.borrowCoinDenom)
|
|
|
|
|
suite.Require().Equal(expectedInterestFactor, currIndexPrior)
|
2020-12-03 21:50:35 +00:00
|
|
|
|
|
|
|
|
// After borrowing again user's borrow balance should have any outstanding interest applied
|
|
|
|
|
if snapshot.shouldBorrow {
|
|
|
|
|
borrowCoinsBefore, _ := suite.keeper.GetBorrow(snapshotCtx, tc.args.user)
|
|
|
|
|
expectedInterestCoins := sdk.NewCoin(tc.args.borrowCoinDenom, expectedInterest)
|
|
|
|
|
expectedBorrowCoinsAfter := borrowCoinsBefore.Amount.Add(snapshot.borrowCoin).Add(expectedInterestCoins)
|
|
|
|
|
|
|
|
|
|
err = suite.keeper.Borrow(snapshotCtx, tc.args.user, sdk.NewCoins(snapshot.borrowCoin))
|
|
|
|
|
suite.Require().NoError(err)
|
|
|
|
|
|
|
|
|
|
borrowCoinsAfter, _ := suite.keeper.GetBorrow(snapshotCtx, tc.args.user)
|
|
|
|
|
suite.Require().Equal(expectedBorrowCoinsAfter, borrowCoinsAfter.Amount)
|
|
|
|
|
}
|
|
|
|
|
// Update previous context to this snapshot's context, segmenting time periods between snapshots
|
|
|
|
|
prevCtx = snapshotCtx
|
|
|
|
|
}
|
|
|
|
|
})
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func TestInterestTestSuite(t *testing.T) {
|
|
|
|
|
suite.Run(t, new(InterestTestSuite))
|
|
|
|
|
}
|
