0g-chain/x/incentive/keeper/cdp_test.go

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package keeper_test
import (
"testing"
"time"
"github.com/stretchr/testify/require"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/kava-labs/kava/app"
"github.com/kava-labs/kava/x/incentive/testutil"
"github.com/kava-labs/kava/x/incentive/types"
)
func TestRiskyCDPsAccumulateRewards(t *testing.T) {
genesisTime := time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC)
_, addrs := app.GeneratePrivKeyAddressPairs(5)
initialCollateral := c("bnb", 1_000_000_000)
user := addrs[0]
authBuilder := app.NewAuthGenesisBuilder().
WithSimpleAccount(user, cs(initialCollateral))
collateralType := "bnb-a"
rewardsPerSecond := c(types.USDXMintingRewardDenom, 1_000_000)
incentBuilder := testutil.NewIncentiveGenesisBuilder().
WithGenesisTime(genesisTime).
WithSimpleUSDXRewardPeriod(collateralType, rewardsPerSecond)
tApp := app.NewTestApp()
tApp.InitializeFromGenesisStates(
authBuilder.BuildMarshalled(),
NewPricefeedGenStateMultiFromTime(genesisTime),
NewCDPGenStateMulti(),
incentBuilder.BuildMarshalled(),
)
ctx := tApp.NewContext(true, abci.Header{Height: 1, Time: genesisTime})
// Setup cdp state containing one CDP
cdpKeeper := tApp.GetCDPKeeper()
err := cdpKeeper.AddCdp(ctx, user, initialCollateral, c("usdx", 100_000_000), collateralType)
require.NoError(t, err)
// Skip ahead two blocks to accumulate both interest and usdx reward for the cdp
// Two blocks are required because the cdp begin blocker runs before incentive begin blocker.
// In the first begin block the cdp is synced, which triggers its claim to sync. But no global rewards have accumulated yet so the sync does nothing.
// Global rewards accumulate immediately after during the incentive begin blocker.
// Rewards are added to the cdp's claim in the next block when the cdp is synced.
_ = tApp.EndBlocker(ctx, abci.RequestEndBlock{})
ctx = ctx.WithBlockTime(ctx.BlockTime().Add(10 * time.Minute))
_ = tApp.BeginBlocker(ctx, abci.RequestBeginBlock{}) // height and time in header are ignored by module begin blockers
_ = tApp.EndBlocker(ctx, abci.RequestEndBlock{})
ctx = ctx.WithBlockTime(ctx.BlockTime().Add(10 * time.Minute))
_ = tApp.BeginBlocker(ctx, abci.RequestBeginBlock{})
// check cdp rewards
cdp, found := cdpKeeper.GetCdpByOwnerAndCollateralType(ctx, user, collateralType)
require.True(t, found)
// This additional sync adds the rewards accumulated at the end of the last begin block.
// They weren't added during the begin blocker as the incentive BB runs after the CDP BB.
incentiveKeeper := tApp.GetIncentiveKeeper()
incentiveKeeper.SynchronizeUSDXMintingReward(ctx, cdp)
claim, found := incentiveKeeper.GetUSDXMintingClaim(ctx, user)
require.True(t, found)
// rewards are roughly rewardsPerSecond * secondsElapsed (10mins) * num blocks (2)
require.Equal(t, c(types.USDXMintingRewardDenom, 1_200_000_557), claim.Reward)
}