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Update GetTotalSurplus and GetTotalDebt to be consistent (#567)

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* update GetTotalSurplus and GetTotalDebt code blocks to be consistent and
resolve feedback in exhibit 13

* spelling fix

* remove uneeded temp variables

* address PR feedback - use suite.Require() instead of default assertions
This commit is contained in:
Nick DeLuca 2020-06-10 09:18:13 -05:00 committed by GitHub
parent a22ecd2f67
commit 3f043b90ac
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2 changed files with 62 additions and 6 deletions
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8
x/cdp/keeper/auctions.go
View File

@ -88,18 +88,14 @@ func (k Keeper) NetSurplusAndDebt(ctx sdk.Context) error {
// GetTotalSurplus returns the total amount of surplus tokens held by the liquidator module account
func (k Keeper) GetTotalSurplus(ctx sdk.Context, accountName string) sdk.Int {
acc := k.supplyKeeper.GetModuleAccount(ctx, accountName)
totalSurplus := sdk.ZeroInt()
dp := k.GetParams(ctx).DebtParam
surplus := acc.GetCoins().AmountOf(dp.Denom)
totalSurplus = totalSurplus.Add(surplus)
return totalSurplus
return acc.GetCoins().AmountOf(dp.Denom)
}
// GetTotalDebt returns the total amount of debt tokens held by the liquidator module account
func (k Keeper) GetTotalDebt(ctx sdk.Context, accountName string) sdk.Int {
acc := k.supplyKeeper.GetModuleAccount(ctx, accountName)
debt := acc.GetCoins().AmountOf(k.GetDebtDenom(ctx))
return debt
return acc.GetCoins().AmountOf(k.GetDebtDenom(ctx))
}
// RunSurplusAndDebtAuctions nets the surplus and debt balances and then creates surplus or debt auctions if the remaining balance is above the auction threshold parameter

60
x/cdp/keeper/auctions_test.go
View File

@ -92,6 +92,66 @@ func (suite *AuctionTestSuite) TestDebtAuction() {
suite.Equal(cs(c("debt", 90000000000)), acc.GetCoins())
}
func (suite *AuctionTestSuite) TestGetTotalSurplus() {
sk := suite.app.GetSupplyKeeper()
// liquidator account has zero coins
suite.Require().Equal(sdk.NewInt(0), suite.keeper.GetTotalSurplus(suite.ctx, types.LiquidatorMacc))
// mint some coins
err := sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("usdx", 100e6)))
suite.Require().NoError(err)
err = sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("usdx", 200e6)))
suite.Require().NoError(err)
// liquidator account has 300e6 total usdx
suite.Require().Equal(sdk.NewInt(300e6), suite.keeper.GetTotalSurplus(suite.ctx, types.LiquidatorMacc))
// mint some debt
err = sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("debt", 500e6)))
suite.Require().NoError(err)
// liquidator account still has 300e6 total usdx -- debt balance is ignored
suite.Require().Equal(sdk.NewInt(300e6), suite.keeper.GetTotalSurplus(suite.ctx, types.LiquidatorMacc))
// burn some usdx
err = sk.BurnCoins(suite.ctx, types.LiquidatorMacc, cs(c("usdx", 50e6)))
suite.Require().NoError(err)
// liquidator usdx decreases
suite.Require().Equal(sdk.NewInt(250e6), suite.keeper.GetTotalSurplus(suite.ctx, types.LiquidatorMacc))
}
func (suite *AuctionTestSuite) TestGetTotalDebt() {
sk := suite.app.GetSupplyKeeper()
// liquidator account has zero debt
suite.Require().Equal(sdk.NewInt(0), suite.keeper.GetTotalSurplus(suite.ctx, types.LiquidatorMacc))
// mint some debt
err := sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("debt", 100e6)))
suite.Require().NoError(err)
err = sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("debt", 200e6)))
suite.Require().NoError(err)
// liquidator account has 300e6 total debt
suite.Require().Equal(sdk.NewInt(300e6), suite.keeper.GetTotalDebt(suite.ctx, types.LiquidatorMacc))
// mint some usdx
err = sk.MintCoins(suite.ctx, types.LiquidatorMacc, cs(c("usdx", 500e6)))
suite.Require().NoError(err)
// liquidator account still has 300e6 total debt -- usdx balance is ignored
suite.Require().Equal(sdk.NewInt(300e6), suite.keeper.GetTotalDebt(suite.ctx, types.LiquidatorMacc))
// burn some debt
err = sk.BurnCoins(suite.ctx, types.LiquidatorMacc, cs(c("debt", 50e6)))
suite.Require().NoError(err)
// liquidator debt decreases
suite.Require().Equal(sdk.NewInt(250e6), suite.keeper.GetTotalDebt(suite.ctx, types.LiquidatorMacc))
}
func TestAuctionTestSuite(t *testing.T) {
suite.Run(t, new(AuctionTestSuite))
}