package keeper_test import ( "math/big" "testing" sdkmath "cosmossdk.io/math" sdk "github.com/cosmos/cosmos-sdk/types" "github.com/stretchr/testify/suite" "github.com/kava-labs/kava/x/evmutil/keeper" "github.com/kava-labs/kava/x/evmutil/testutil" "github.com/kava-labs/kava/x/evmutil/types" ) type invariantTestSuite struct { testutil.Suite invariants map[string]map[string]sdk.Invariant contractAddr types.InternalEVMAddress } func TestInvariantTestSuite(t *testing.T) { suite.Run(t, new(invariantTestSuite)) } func (suite *invariantTestSuite) SetupTest() { suite.Suite.SetupTest() suite.contractAddr = suite.DeployERC20() suite.invariants = make(map[string]map[string]sdk.Invariant) keeper.RegisterInvariants(suite, suite.BankKeeper, suite.Keeper) } func (suite *invariantTestSuite) SetupValidState() { for i := 0; i < 4; i++ { suite.Keeper.SetAccount(suite.Ctx, *types.NewAccount( suite.Addrs[i], keeper.ConversionMultiplier.QuoRaw(2), )) } suite.FundModuleAccountWithKava( types.ModuleName, sdk.NewCoins( sdk.NewCoin("ukava", sdkmath.NewInt(2)), // ( sum of all minor balances ) / conversion multiplier ), ) err := suite.Keeper.MintERC20(suite.Ctx, suite.contractAddr, suite.Key1Addr, big.NewInt(1000000)) suite.Require().NoError(err) // key1 ERC20 bal -10000, sdk.Coin +1000 // Module account balance 0 -> 1000 _, err = suite.Keeper.CallEVM( suite.Ctx, types.ERC20MintableBurnableContract.ABI, suite.Key1Addr.Address, suite.contractAddr, "convertToCoin", // convertToCoin ERC20 args suite.Key1Addr.Address, big.NewInt(1000), ) suite.Require().NoError(err) } // RegisterRoutes implements sdk.InvariantRegistry func (suite *invariantTestSuite) RegisterRoute(moduleName string, route string, invariant sdk.Invariant) { _, exists := suite.invariants[moduleName] if !exists { suite.invariants[moduleName] = make(map[string]sdk.Invariant) } suite.invariants[moduleName][route] = invariant } func (suite *invariantTestSuite) runInvariant(route string, invariant func(bankKeeper types.BankKeeper, k keeper.Keeper) sdk.Invariant) (string, bool) { ctx := suite.Ctx registeredInvariant := suite.invariants[types.ModuleName][route] suite.Require().NotNil(registeredInvariant) // direct call dMessage, dBroken := invariant(suite.BankKeeper, suite.Keeper)(ctx) // registered call rMessage, rBroken := registeredInvariant(ctx) // all call aMessage, aBroken := keeper.AllInvariants(suite.BankKeeper, suite.Keeper)(ctx) // require matching values for direct call and registered call suite.Require().Equal(dMessage, rMessage, "expected registered invariant message to match") suite.Require().Equal(dBroken, rBroken, "expected registered invariant broken to match") // require matching values for direct call and all invariants call if broken suite.Require().Equal(dBroken, aBroken, "expected all invariant broken to match") if dBroken { suite.Require().Equal(dMessage, aMessage, "expected all invariant message to match") } return dMessage, dBroken } func (suite *invariantTestSuite) TestFullyBackedInvariant() { // default state is valid _, broken := suite.runInvariant("fully-backed", keeper.FullyBackedInvariant) suite.Equal(false, broken) suite.SetupValidState() _, broken = suite.runInvariant("fully-backed", keeper.FullyBackedInvariant) suite.Equal(false, broken) // break invariant by increasing total minor balances above module balance suite.Keeper.AddBalance(suite.Ctx, suite.Addrs[0], sdk.OneInt()) message, broken := suite.runInvariant("fully-backed", keeper.FullyBackedInvariant) suite.Equal("evmutil: fully backed broken invariant\nsum of minor balances greater than module account\n", message) suite.Equal(true, broken) } func (suite *invariantTestSuite) TestSmallBalances() { // default state is valid _, broken := suite.runInvariant("small-balances", keeper.SmallBalancesInvariant) suite.Equal(false, broken) suite.SetupValidState() _, broken = suite.runInvariant("small-balances", keeper.SmallBalancesInvariant) suite.Equal(false, broken) // increase minor balance at least above conversion multiplier suite.Keeper.AddBalance(suite.Ctx, suite.Addrs[0], keeper.ConversionMultiplier) // add same number of ukava to avoid breaking other invariants amt := sdk.NewCoins(sdk.NewInt64Coin(keeper.CosmosDenom, 1)) suite.Require().NoError( suite.App.FundModuleAccount(suite.Ctx, types.ModuleName, amt), ) message, broken := suite.runInvariant("small-balances", keeper.SmallBalancesInvariant) suite.Equal("evmutil: small balances broken invariant\nminor balances not all less than overflow\n", message) suite.Equal(true, broken) }