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8c64fd3750
0g-chain/x/cdp/keeper/draw_test.go
Kevin Davis 22dc15f757
Apply debt floor to repayments (#314) 
* fix: remove redundant debt limit param

* wip: test pricefeed genesis

* fix: pricefeed querier

* fix: comments, naming

* fix: query path

* fix: store methods

* fix: query methods

* feat: Liquidation Penalty

* feat: enforce debt floor on repayment

* address review comments

* fix: remove debt from liquidation penalty

* test: remove payment > balance check

* feat: handle overpayment

* fix: avoid negative coins error for overpayments
2020-01-22 16:50:27 +00:00

209 lines
8.7 KiB
Go
Raw Blame History

package keeper_test
import (
"testing"
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/kava-labs/kava/app"
"github.com/kava-labs/kava/x/cdp/keeper"
"github.com/kava-labs/kava/x/cdp/types"
"github.com/stretchr/testify/suite"
abci "github.com/tendermint/tendermint/abci/types"
tmtime "github.com/tendermint/tendermint/types/time"
)
type DrawTestSuite struct {
suite.Suite
keeper keeper.Keeper
app app.TestApp
ctx sdk.Context
addrs []sdk.AccAddress
}
func (suite *DrawTestSuite) SetupTest() {
tApp := app.NewTestApp()
ctx := tApp.NewContext(true, abci.Header{Height: 1, Time: tmtime.Now()})
_, addrs := app.GeneratePrivKeyAddressPairs(3)
authGS := app.NewAuthGenState(
addrs,
[]sdk.Coins{
cs(c("xrp", 500000000), c("btc", 500000000), c("usdx", 10000000000)),
cs(c("xrp", 200000000)),
cs(c("xrp", 10000000000000), c("usdx", 100000000000))})
tApp.InitializeFromGenesisStates(
authGS,
NewPricefeedGenStateMulti(),
NewCDPGenStateMulti(),
)
keeper := tApp.GetCDPKeeper()
suite.app = tApp
suite.keeper = keeper
suite.ctx = ctx
suite.addrs = addrs
err := suite.keeper.AddCdp(suite.ctx, addrs[0], cs(c("xrp", 400000000)), cs(c("usdx", 10000000)))
suite.NoError(err)
}
func (suite *DrawTestSuite) TestAddRepayPrincipal() {
err := suite.keeper.AddPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
suite.NoError(err)
t, _ := suite.keeper.GetCDP(suite.ctx, "xrp", uint64(1))
suite.Equal(cs(c("usdx", 20000000)), t.Principal)
ctd := suite.keeper.CalculateCollateralToDebtRatio(suite.ctx, t.Collateral, t.Principal.Add(t.AccumulatedFees))
suite.Equal(d("20.0"), ctd)
ts := suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("20.0"))
suite.Equal(0, len(ts))
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("20.0").Add(sdk.SmallestDec()))
suite.Equal(ts[0], t)
tp := suite.keeper.GetTotalPrincipal(suite.ctx, "xrp", "usdx")
suite.Equal(i(20000000), tp)
sk := suite.app.GetSupplyKeeper()
acc := sk.GetModuleAccount(suite.ctx, types.ModuleName)
suite.Equal(cs(c("xrp", 400000000), c("debt", 20000000)), acc.GetCoins())
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("susd", 10000000)))
suite.NoError(err)
t, _ = suite.keeper.GetCDP(suite.ctx, "xrp", uint64(1))
suite.Equal(cs(c("usdx", 20000000), c("susd", 10000000)), t.Principal)
ctd = suite.keeper.CalculateCollateralToDebtRatio(suite.ctx, t.Collateral, t.Principal.Add(t.AccumulatedFees))
suite.Equal(d("400000000").Quo(d("30000000")), ctd)
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("400").Quo(d("30")))
suite.Equal(0, len(ts))
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("400").Quo(d("30")).Add(sdk.SmallestDec()))
suite.Equal(ts[0], t)
tp = suite.keeper.GetTotalPrincipal(suite.ctx, "xrp", "susd")
suite.Equal(i(10000000), tp)
sk = suite.app.GetSupplyKeeper()
acc = sk.GetModuleAccount(suite.ctx, types.ModuleName)
suite.Equal(cs(c("xrp", 400000000), c("debt", 30000000)), acc.GetCoins())
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[1], "xrp", cs(c("usdx", 10000000)))
suite.Equal(types.CodeCdpNotFound, err.Result().Code)
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("xusd", 10000000)))
suite.Equal(types.CodeDebtNotSupported, err.Result().Code)
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 311000000)))
suite.Equal(types.CodeInvalidCollateralRatio, err.Result().Code)
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
suite.NoError(err)
t, _ = suite.keeper.GetCDP(suite.ctx, "xrp", uint64(1))
suite.Equal(cs(c("usdx", 10000000), c("susd", 10000000)), t.Principal)
ctd = suite.keeper.CalculateCollateralToDebtRatio(suite.ctx, t.Collateral, t.Principal.Add(t.AccumulatedFees))
suite.Equal(d("20.0"), ctd)
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("20.0"))
suite.Equal(0, len(ts))
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("20.0").Add(sdk.SmallestDec()))
suite.Equal(ts[0], t)
tp = suite.keeper.GetTotalPrincipal(suite.ctx, "xrp", "usdx")
suite.Equal(i(10000000), tp)
sk = suite.app.GetSupplyKeeper()
acc = sk.GetModuleAccount(suite.ctx, types.ModuleName)
suite.Equal(cs(c("xrp", 400000000), c("debt", 20000000)), acc.GetCoins())
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("susd", 10000000)))
suite.NoError(err)
t, _ = suite.keeper.GetCDP(suite.ctx, "xrp", uint64(1))
suite.Equal(cs(c("usdx", 10000000)), t.Principal)
ctd = suite.keeper.CalculateCollateralToDebtRatio(suite.ctx, t.Collateral, t.Principal.Add(t.AccumulatedFees))
suite.Equal(d("40.0"), ctd)
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("40.0"))
suite.Equal(0, len(ts))
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", d("40.0").Add(sdk.SmallestDec()))
suite.Equal(ts[0], t)
tp = suite.keeper.GetTotalPrincipal(suite.ctx, "xrp", "susd")
suite.Equal(i(0), tp)
sk = suite.app.GetSupplyKeeper()
acc = sk.GetModuleAccount(suite.ctx, types.ModuleName)
suite.Equal(cs(c("xrp", 400000000), c("debt", 10000000)), acc.GetCoins())
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("xusd", 10000000)))
suite.Equal(types.CodeInvalidPaymentDenom, err.Result().Code)
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[1], "xrp", cs(c("xusd", 10000000)))
suite.Equal(types.CodeCdpNotFound, err.Result().Code)
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 9000000)))
suite.Equal(types.CodeBelowDebtFloor, err.Result().Code)
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
suite.NoError(err)
_, found := suite.keeper.GetCDP(suite.ctx, "xrp", uint64(1))
suite.False(found)
ts = suite.keeper.GetAllCdpsByDenomAndRatio(suite.ctx, "xrp", types.MaxSortableDec)
suite.Equal(0, len(ts))
ts = suite.keeper.GetAllCdpsByDenom(suite.ctx, "xrp")
suite.Equal(0, len(ts))
sk = suite.app.GetSupplyKeeper()
acc = sk.GetModuleAccount(suite.ctx, types.ModuleName)
suite.Equal(sdk.Coins(nil), acc.GetCoins())
}
func (suite *DrawTestSuite) TestRepayPrincipalOverpay() {
err := suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[0], "xrp", cs(c("usdx", 20000000)))
suite.NoError(err)
ak := suite.app.GetAccountKeeper()
acc := ak.GetAccount(suite.ctx, suite.addrs[0])
suite.Equal(i(10000000000), (acc.GetCoins().AmountOf("usdx")))
_, found := suite.keeper.GetCDP(suite.ctx, "xrp", 1)
suite.False(found)
}
func (suite *DrawTestSuite) TestAddRepayPrincipalFees() {
err := suite.keeper.AddCdp(suite.ctx, suite.addrs[2], cs(c("xrp", 1000000000000)), cs(c("usdx", 100000000000)))
suite.NoError(err)
suite.ctx = suite.ctx.WithBlockTime(suite.ctx.BlockTime().Add(time.Minute * 10))
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[2], "xrp", cs(c("usdx", 10000000)))
suite.NoError(err)
t, _ := suite.keeper.GetCDP(suite.ctx, "xrp", uint64(2))
suite.Equal(cs(c("usdx", 92827)), t.AccumulatedFees)
_ = suite.keeper.MintDebtCoins(suite.ctx, types.ModuleName, "debt", cs(c("usdx", 92827)))
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[2], "xrp", cs(c("usdx", 100)))
suite.NoError(err)
t, _ = suite.keeper.GetCDP(suite.ctx, "xrp", uint64(2))
suite.Equal(cs(c("usdx", 92727)), t.AccumulatedFees)
err = suite.keeper.RepayPrincipal(suite.ctx, suite.addrs[2], "xrp", cs(c("usdx", 100010092727)))
suite.NoError(err)
_, f := suite.keeper.GetCDP(suite.ctx, "xrp", uint64(2))
suite.False(f)
err = suite.keeper.AddCdp(suite.ctx, suite.addrs[2], cs(c("xrp", 1000000000000)), cs(c("usdx", 100000000)))
suite.NoError(err)
suite.ctx = suite.ctx.WithBlockTime(suite.ctx.BlockTime().Add(time.Second * 31536000))
err = suite.keeper.AddPrincipal(suite.ctx, suite.addrs[2], "xrp", cs(c("usdx", 100000000)))
suite.NoError(err)
t, _ = suite.keeper.GetCDP(suite.ctx, "xrp", uint64(3))
suite.Equal(cs(c("usdx", 5000000)), t.AccumulatedFees)
}
func (suite *DrawTestSuite) TestPricefeedFailure() {
ctx := suite.ctx.WithBlockTime(suite.ctx.BlockTime().Add(time.Hour * 2))
pfk := suite.app.GetPriceFeedKeeper()
pfk.SetCurrentPrices(ctx, "xrp:usd")
err := suite.keeper.AddPrincipal(ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
suite.Error(err)
err = suite.keeper.RepayPrincipal(ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
suite.NoError(err)
}
func (suite *DrawTestSuite) TestModuleAccountFailure() {
suite.Panics(func() {
ctx := suite.ctx.WithBlockHeader(suite.ctx.BlockHeader())
sk := suite.app.GetSupplyKeeper()
acc := sk.GetModuleAccount(ctx, types.ModuleName)
ak := suite.app.GetAccountKeeper()
ak.RemoveAccount(ctx, acc)
_ = suite.keeper.RepayPrincipal(ctx, suite.addrs[0], "xrp", cs(c("usdx", 10000000)))
})
}
func TestDrawTestSuite(t *testing.T) {
suite.Run(t, new(DrawTestSuite))
}
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