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Hard: investigate sdk.RelativePow runtime panic (#762)

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* interest rate practical test

* add clarification comment
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Denali Marsh 2021-01-12 10:03:09 +01:00 committed by GitHub
parent a0d70e1c81
commit f6efc2597b
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1 changed files with 8 additions and 2 deletions
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10
x/hard/keeper/interest_test.go
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@ -289,8 +289,6 @@ func (suite *InterestTestSuite) TestCalculateBorrowInterestFactor() {
expectedValue: sdk.MustNewDecFromStr("40628388.864535408465693310"), expectedValue: sdk.MustNewDecFromStr("40628388.864535408465693310"),
}, },
}, },
// If we raise the per second interest rate too much we'll cause an integer overflow.
// For example, perSecondInterestRate: '1.000005555555' will cause a panic.
{ {
"1 year: highest interest rate", "1 year: highest interest rate",
args{ args{
@ -299,6 +297,14 @@ func (suite *InterestTestSuite) TestCalculateBorrowInterestFactor() {
expectedValue: sdk.MustNewDecFromStr("2017093013158200407564.613502861572552603"), expectedValue: sdk.MustNewDecFromStr("2017093013158200407564.613502861572552603"),
}, },
}, },
{
"largest per second interest rate with practical elapsed time",
args{
perSecondInterestRate: sdk.MustNewDecFromStr("18.445"), // Begins to panic at ~18.45 (1845%/second interest rate)
timeElapsed: sdk.NewInt(30), // Assume a 30 second period, longer than any expected individual block
expectedValue: sdk.MustNewDecFromStr("94702138679846565921082258202543002089.215969366091911769"),
},
},
} }
for _, tc := range testCases { for _, tc := range testCases {