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0g-chain/x/hard/keeper/repay_test.go
Denali Marsh fe2a131b31
Hard Audit: add minimum borrow USD value (#822) 
* add module param MinimumBorrowUSDValue

* borrow/repay min limit restrictions

* add borrow/repay test cases

* update tests with new module params

* update timelock test with param

* update withdraw LTV test

* remove unused GetCurrentBorrowUSDValue method

* commit to prompt CircleCI run
2021-02-12 08:28:05 -07:00

294 lines
12 KiB
Go
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package keeper_test
import (
"strings"
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/crypto"
tmtime "github.com/tendermint/tendermint/types/time"
"github.com/kava-labs/kava/app"
"github.com/kava-labs/kava/x/hard"
"github.com/kava-labs/kava/x/hard/types"
"github.com/kava-labs/kava/x/pricefeed"
)
func (suite *KeeperTestSuite) TestRepay() {
type args struct {
borrower sdk.AccAddress
initialBorrowerCoins sdk.Coins
initialModuleCoins sdk.Coins
depositCoins []sdk.Coin
borrowCoins sdk.Coins
repayCoins sdk.Coins
expectedAccountBalance sdk.Coins
expectedModAccountBalance sdk.Coins
}
type errArgs struct {
expectPass bool
expectDelete bool
contains string
}
type borrowTest struct {
name string
args args
errArgs errArgs
}
model := types.NewInterestRateModel(sdk.MustNewDecFromStr("0.05"), sdk.MustNewDecFromStr("2"), sdk.MustNewDecFromStr("0.8"), sdk.MustNewDecFromStr("10"))
testCases := []borrowTest{
{
"valid: partial repay",
args{
borrower: 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)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(10*KAVA_CF))),
},
errArgs{
expectPass: true,
expectDelete: false,
contains: "",
},
},
{
"valid: repay in full",
args{
borrower: 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)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
},
errArgs{
expectPass: true,
expectDelete: true,
contains: "",
},
},
{
"valid: overpayment is adjusted",
args{
borrower: 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)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("ukava", sdk.NewInt(80*KAVA_CF))}, // Deposit less so user still has some KAVA
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(60*KAVA_CF))), // Exceeds borrowed coins but not user's balance
},
errArgs{
expectPass: true,
expectDelete: true,
contains: "",
},
},
{
"invalid: attempt to repay non-supplied coin",
args{
borrower: 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)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(10*KAVA_CF)), sdk.NewCoin("bnb", sdk.NewInt(10*KAVA_CF))),
},
errArgs{
expectPass: false,
expectDelete: false,
contains: "account can only repay up to 0bnb",
},
},
{
"invalid: insufficent balance for repay",
args{
borrower: 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)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("ukava", sdk.NewInt(100*KAVA_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(50*KAVA_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(51*KAVA_CF))), // Exceeds user's KAVA balance
},
errArgs{
expectPass: false,
expectDelete: false,
contains: "account can only repay up to 50000000ukava",
},
},
{
"invalid: repaying a single coin type results in borrow position below the minimum USD value",
args{
borrower: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(100*USDX_CF))),
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("usdx", sdk.NewInt(100*USDX_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(50*USDX_CF))),
repayCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(45*USDX_CF))),
},
errArgs{
expectPass: false,
expectDelete: false,
contains: "proposed borrow's USD value $5.000000000000000000 is below the minimum borrow limit",
},
},
{
"invalid: repaying multiple coin types results in borrow position below the minimum USD value",
args{
borrower: sdk.AccAddress(crypto.AddressHash([]byte("test"))),
initialBorrowerCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(100*USDX_CF))),
initialModuleCoins: sdk.NewCoins(sdk.NewCoin("ukava", sdk.NewInt(1000*KAVA_CF)), sdk.NewCoin("usdx", sdk.NewInt(1000*USDX_CF))),
depositCoins: []sdk.Coin{sdk.NewCoin("usdx", sdk.NewInt(100*USDX_CF))},
borrowCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(50*USDX_CF)), sdk.NewCoin("ukava", sdk.NewInt(10*KAVA_CF))), // (50*$1)+(10*$2) = $70
repayCoins: sdk.NewCoins(sdk.NewCoin("usdx", sdk.NewInt(45*USDX_CF)), sdk.NewCoin("ukava", sdk.NewInt(8*KAVA_CF))), // (45*$1)+(8*2) = $61
},
errArgs{
expectPass: false,
expectDelete: false,
contains: "proposed borrow's USD value $9.000000000000000000 is below the minimum borrow limit",
},
},
}
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.borrower},
[]sdk.Coins{tc.args.initialBorrowerCoins})
// Hard module genesis state
hardGS := types.NewGenesisState(types.NewParams(
types.MoneyMarkets{
types.NewMoneyMarket("usdx",
types.NewBorrowLimit(false, sdk.NewDec(100000000*USDX_CF), sdk.MustNewDecFromStr("1")), // Borrow Limit
"usdx:usd", // Market ID
sdk.NewInt(USDX_CF), // Conversion Factor
model, // Interest Rate Model
sdk.MustNewDecFromStr("0.05"), // Reserve Factor
sdk.MustNewDecFromStr("0.05")), // Keeper Reward Percent
types.NewMoneyMarket("ukava",
types.NewBorrowLimit(false, sdk.NewDec(100000000*KAVA_CF), sdk.MustNewDecFromStr("0.8")), // Borrow Limit
"kava:usd", // Market ID
sdk.NewInt(KAVA_CF), // Conversion Factor
model, // Interest Rate Model
sdk.MustNewDecFromStr("0.05"), // Reserve Factor
sdk.MustNewDecFromStr("0.05")), // Keeper Reward Percent
},
sdk.NewDec(10),
), types.DefaultAccumulationTimes, types.DefaultDeposits, types.DefaultBorrows,
types.DefaultTotalSupplied, types.DefaultTotalBorrowed, types.DefaultTotalReserves,
)
// Pricefeed module genesis state
pricefeedGS := pricefeed.GenesisState{
Params: pricefeed.Params{
Markets: []pricefeed.Market{
{MarketID: "usdx:usd", BaseAsset: "usdx", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true},
{MarketID: "kava:usd", BaseAsset: "kava", QuoteAsset: "usd", Oracles: []sdk.AccAddress{}, Active: true},
},
},
PostedPrices: []pricefeed.PostedPrice{
{
MarketID: "usdx:usd",
OracleAddress: sdk.AccAddress{},
Price: sdk.MustNewDecFromStr("1.00"),
Expiry: time.Now().Add(1 * time.Hour),
},
{
MarketID: "kava:usd",
OracleAddress: sdk.AccAddress{},
Price: sdk.MustNewDecFromStr("2.00"),
Expiry: time.Now().Add(1 * time.Hour),
},
},
}
// Initialize test application
tApp.InitializeFromGenesisStates(authGS,
app.GenesisState{pricefeed.ModuleName: pricefeed.ModuleCdc.MustMarshalJSON(pricefeedGS)},
app.GenesisState{types.ModuleName: types.ModuleCdc.MustMarshalJSON(hardGS)},
)
// Mint coins to Hard module account
supplyKeeper := tApp.GetSupplyKeeper()
supplyKeeper.MintCoins(ctx, types.ModuleAccountName, tc.args.initialModuleCoins)
keeper := tApp.GetHardKeeper()
suite.app = tApp
suite.ctx = ctx
suite.keeper = keeper
var err error
// Run BeginBlocker once to transition MoneyMarkets
hard.BeginBlocker(suite.ctx, suite.keeper)
// Deposit coins to hard
err = suite.keeper.Deposit(suite.ctx, tc.args.borrower, tc.args.depositCoins)
suite.Require().NoError(err)
// Borrow coins from hard
err = suite.keeper.Borrow(suite.ctx, tc.args.borrower, tc.args.borrowCoins)
suite.Require().NoError(err)
err = suite.keeper.Repay(suite.ctx, tc.args.borrower, tc.args.borrower, tc.args.repayCoins)
if tc.errArgs.expectPass {
suite.Require().NoError(err)
// If we overpaid expect an adjustment
repaymentCoins, err := suite.keeper.CalculatePaymentAmount(tc.args.borrowCoins, tc.args.repayCoins)
suite.Require().NoError(err)
// Check borrower balance
expectedBorrowerCoins := tc.args.initialBorrowerCoins.Sub(tc.args.depositCoins).Add(tc.args.borrowCoins...).Sub(repaymentCoins)
acc := suite.getAccount(tc.args.borrower)
suite.Require().Equal(expectedBorrowerCoins, acc.GetCoins())
// Check module account balance
expectedModuleCoins := tc.args.initialModuleCoins.Add(tc.args.depositCoins...).Sub(tc.args.borrowCoins).Add(repaymentCoins...)
mAcc := suite.getModuleAccount(types.ModuleAccountName)
suite.Require().Equal(expectedModuleCoins, mAcc.GetCoins())
// Check user's borrow object
borrow, foundBorrow := suite.keeper.GetBorrow(suite.ctx, tc.args.borrower)
expectedBorrowCoins := tc.args.borrowCoins.Sub(repaymentCoins)
if tc.errArgs.expectDelete {
suite.Require().False(foundBorrow)
} else {
suite.Require().True(foundBorrow)
suite.Require().Equal(expectedBorrowCoins, borrow.Amount)
}
} else {
suite.Require().Error(err)
suite.Require().True(strings.Contains(err.Error(), tc.errArgs.contains))
// Check borrower balance (no repay coins)
expectedBorrowerCoins := tc.args.initialBorrowerCoins.Sub(tc.args.depositCoins).Add(tc.args.borrowCoins...)
acc := suite.getAccount(tc.args.borrower)
suite.Require().Equal(expectedBorrowerCoins, acc.GetCoins())
// Check module account balance (no repay coins)
expectedModuleCoins := tc.args.initialModuleCoins.Add(tc.args.depositCoins...).Sub(tc.args.borrowCoins)
mAcc := suite.getModuleAccount(types.ModuleAccountName)
suite.Require().Equal(expectedModuleCoins, mAcc.GetCoins())
// Check user's borrow object (no repay coins)
borrow, foundBorrow := suite.keeper.GetBorrow(suite.ctx, tc.args.borrower)
suite.Require().True(foundBorrow)
suite.Require().Equal(tc.args.borrowCoins, borrow.Amount)
}
})
}
}
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