46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
package simulation
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import (
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"errors"
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"fmt"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/auth"
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)
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// NonnegativeBalanceInvariant checks that all accounts in the application have non-negative balances
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func NonnegativeBalanceInvariant(ak auth.AccountKeeper) sdk.Invariant {
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return func(ctx sdk.Context) error {
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accts := ak.GetAllAccounts(ctx)
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for _, acc := range accts {
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coins := acc.GetCoins()
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if coins.IsAnyNegative() {
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return fmt.Errorf("%s has a negative denomination of %s",
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acc.GetAddress().String(),
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coins.String())
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}
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}
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return nil
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}
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}
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// TotalCoinsInvariant checks that the sum of the coins across all accounts
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// is what is expected
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func TotalCoinsInvariant(ak auth.AccountKeeper, totalSupplyFn func() sdk.Coins) sdk.Invariant {
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return func(ctx sdk.Context) error {
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totalCoins := sdk.Coins{}
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chkAccount := func(acc auth.Account) bool {
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coins := acc.GetCoins()
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totalCoins = totalCoins.Add(coins)
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return false
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}
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ak.IterateAccounts(ctx, chkAccount)
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if !totalSupplyFn().IsEqual(totalCoins) {
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return errors.New("total calculated coins doesn't equal expected coins")
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}
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return nil
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}
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}
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