mirror of
https://github.com/0glabs/0g-chain.git
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101 lines
3.4 KiB
Go
101 lines
3.4 KiB
Go
package keeper
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import (
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"fmt"
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sdk "github.com/cosmos/cosmos-sdk/types"
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authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
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"github.com/kava-labs/kava/x/evmutil/types"
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)
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// RegisterInvariants registers the swap module invariants
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func RegisterInvariants(ir sdk.InvariantRegistry, bankK types.BankKeeper, k Keeper) {
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ir.RegisterRoute(types.ModuleName, "cosmos-coins-fully-backed", CosmosCoinsFullyBackedInvariant(bankK, k))
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// Disable this invariant due to some issues with it requiring some staking params to be set in genesis.
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// ir.RegisterRoute(types.ModuleName, "backed-conversion-coins", BackedCoinsInvariant(bankK, k))
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}
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// AllInvariants runs all invariants of the swap module
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func AllInvariants(bankK types.BankKeeper, k Keeper) sdk.Invariant {
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return func(ctx sdk.Context) (string, bool) {
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if res, stop := BackedCoinsInvariant(bankK, k)(ctx); stop {
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return res, stop
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}
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return CosmosCoinsFullyBackedInvariant(bankK, k)(ctx)
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}
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}
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// BackedCoinsInvariant iterates all conversion pairs and asserts that the
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// sdk.Coin balances are less than the module ERC20 balance.
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// **Note:** This compares <= and not == as anyone can send tokens to the
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// ERC20 contract address and break the invariant if a strict equal check.
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func BackedCoinsInvariant(_ types.BankKeeper, k Keeper) sdk.Invariant {
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broken := false
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message := sdk.FormatInvariant(
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types.ModuleName,
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"backed coins broken",
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"coin supply is greater than module account ERC20 tokens",
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)
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return func(ctx sdk.Context) (string, bool) {
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params := k.GetParams(ctx)
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for _, pair := range params.EnabledConversionPairs {
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erc20Balance, err := k.QueryERC20BalanceOf(
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ctx,
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pair.GetAddress(),
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types.NewInternalEVMAddress(types.ModuleEVMAddress),
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)
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if err != nil {
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panic(err)
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}
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supply := k.bankKeeper.GetSupply(ctx, pair.Denom)
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// Must be true: sdk.Coin supply < ERC20 balanceOf(module account)
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if supply.Amount.BigInt().Cmp(erc20Balance) > 0 {
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broken = true
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break
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}
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}
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return message, broken
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}
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}
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// CosmosCoinsFullyBackedInvariant ensures the total supply of ERC20 representations of sdk.Coins
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// match the balances in the module account.
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//
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// This invariant depends on the fact that coins can only become part of the balance through
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// conversion to ERC20s.
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// If in the future sdk.Coins can be sent directly to the module account,
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// or the module account balance can be increased in any other way,
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// this invariant should be changed from checking that the balance equals the total supply,
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// to check that the balance is greater than or equal to the total supply.
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func CosmosCoinsFullyBackedInvariant(bankK types.BankKeeper, k Keeper) sdk.Invariant {
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broken := false
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message := sdk.FormatInvariant(
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types.ModuleName,
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"cosmos coins fully-backed broken",
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"ERC20 total supply is not equal to module account balance",
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)
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maccAddress := authtypes.NewModuleAddress(types.ModuleName)
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return func(ctx sdk.Context) (string, bool) {
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k.IterateAllDeployedCosmosCoinContracts(ctx, func(c types.DeployedCosmosCoinContract) bool {
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moduleBalance := bankK.GetBalance(ctx, maccAddress, c.CosmosDenom).Amount
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totalSupply, err := k.QueryERC20TotalSupply(ctx, *c.Address)
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if err != nil {
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panic(fmt.Sprintf("failed to query total supply for %+v", c))
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}
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// expect total supply to equal balance in the module
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if totalSupply.Cmp(moduleBalance.BigInt()) != 0 {
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broken = true
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}
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return broken
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})
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return message, broken
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}
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}
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