package keeper_test import ( "testing" "time" sdk "github.com/cosmos/cosmos-sdk/types" pricefeedtypes "github.com/kava-labs/kava/x/pricefeed/types" earntypes "github.com/kava-labs/kava/x/earn/types" "github.com/kava-labs/kava/x/incentive/keeper" "github.com/kava-labs/kava/x/incentive/types" "github.com/stretchr/testify/suite" ) type QuerierTestSuite struct { unitTester } func TestQuerierTestSuite(t *testing.T) { suite.Run(t, new(QuerierTestSuite)) } func (suite *QuerierTestSuite) TestGetStakingAPR() { communityTax := sdk.MustNewDecFromStr("0.90") inflation := sdk.MustNewDecFromStr("0.75") bondedTokens := int64(120_000_000_000000) liquidStakedTokens := int64(60_000_000_000000) totalSupply := int64(289_138_414_286684) // inflation values below are used to regression test the switch from x/mint to x/kavamint // rather than define the total inflation w/ a community tax, we now directly define // inflation for staking rewards & inflation for the community pool. // derive these values from the above values in order to verify no change to output bondedRatio := sdk.NewDec(bondedTokens).Quo(sdk.NewDec(totalSupply)) communityInflation := inflation. Mul(communityTax). Quo(bondedRatio) stakingRewardsApy := inflation. Mul(sdk.OneDec().Sub(communityTax)). Quo(bondedRatio) usdcDenom := "erc20/multichain/usdc" usdcSupply := int64(2_500_000_000000) earnKeeper := newFakeEarnKeeper(). addVault("bkava-asdf", earntypes.NewVaultShare("bkava-asdf", sdk.NewDec(liquidStakedTokens))). addVault(usdcDenom, earntypes.NewVaultShare(usdcDenom, sdk.NewDec(usdcSupply))) suite.keeper = suite.NewTestKeeper(&fakeParamSubspace{}). WithKavamintKeeper( newFakeKavamintKeeper(). setCommunityInflation(communityInflation). setStakingApy(stakingRewardsApy), ). WithStakingKeeper( newFakeStakingKeeper().addBondedTokens(bondedTokens), ). WithBankKeeper( newFakeBankKeeper().setSupply(sdk.NewCoin(types.BondDenom, sdk.NewInt(totalSupply))), ). WithEarnKeeper(earnKeeper). WithLiquidKeeper( newFakeLiquidKeeper().addDerivative(suite.ctx, "bkava-asdf", sdk.NewInt(liquidStakedTokens)), ). WithPricefeedKeeper( newFakePricefeedKeeper(). setPrice(pricefeedtypes.NewCurrentPrice("kava:usd:30", sdk.MustNewDecFromStr("1.5"))). setPrice(pricefeedtypes.NewCurrentPrice("usdc:usd:30", sdk.OneDec())), ). Build() // ~18% APR expectedStakingAPY := inflation. Mul(sdk.OneDec().Sub(communityTax)). Quo(sdk.NewDec(bondedTokens).Quo(sdk.NewDec(totalSupply))) // Staking APR = (Inflation Rate * (1 - Community Tax)) / (Bonded Tokens / Circulating Supply) aprWithoutIncentives, err := keeper.GetStakingAPR(suite.ctx, suite.keeper, types.Params{}) suite.Require().NoError(err) suite.Require().Equal( expectedStakingAPY, aprWithoutIncentives, ) suite.T().Logf("Staking APR without incentives: %s", aprWithoutIncentives) params := types.Params{ EarnRewardPeriods: types.MultiRewardPeriods{ { Active: true, CollateralType: "bkava", Start: suite.ctx.BlockTime().Add(-time.Hour), End: suite.ctx.BlockTime().Add(time.Hour), RewardsPerSecond: sdk.NewCoins( sdk.NewCoin("ukava", sdk.NewInt(190258)), ), }, { Active: true, CollateralType: "erc20/multichain/usdc", Start: suite.ctx.BlockTime().Add(-time.Hour), End: suite.ctx.BlockTime().Add(time.Hour), RewardsPerSecond: sdk.NewCoins( sdk.NewCoin("ukava", sdk.NewInt(5284)), ), }, }, } suite.Run("GetStakingAPR", func() { aprWithIncentives, err := keeper.GetStakingAPR(suite.ctx, suite.keeper, params) suite.Require().NoError(err) // Approx 10% increase in APR from incentives suite.Require().Equal(sdk.MustNewDecFromStr("0.280711113729177500"), aprWithIncentives) suite.Require().Truef( aprWithIncentives.GT(aprWithoutIncentives), "APR with incentives (%s) should be greater than APR without incentives (%s)", ) }) suite.Run("GetAPYFromMultiRewardPeriod", func() { vaultTotalValue, err := earnKeeper.GetVaultTotalValue(suite.ctx, usdcDenom) suite.Require().NoError(err) suite.Require().True(vaultTotalValue.Amount.IsPositive()) apy, err := keeper.GetAPYFromMultiRewardPeriod( suite.ctx, suite.keeper, usdcDenom, params.EarnRewardPeriods[1], vaultTotalValue.Amount, ) suite.Require().NoError(err) suite.Require().Equal( sdk.MustNewDecFromStr("0.099981734400000000"), apy, "usdc apy should be approx 10%", ) }) }