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invariants.go
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invariants.go
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package keeper
import (
"fmt"
"github.com/chain4energy/c4e-chain/x/cfedistributor/types"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// RegisterInvariants register cfedistribution invariants
func RegisterInvariants(ir sdk.InvariantRegistry, k Keeper) {
ir.RegisterRoute(types.ModuleName, "nonnegative-coin-state",
NonNegativeCoinStateInvariant(k))
ir.RegisterRoute(types.ModuleName, "state-sum-balance-check",
StateSumBalanceCheckInvariant(k))
}
// NonNegativeCoinStateInvariant checks that any coin state is negative
func NonNegativeCoinStateInvariant(k Keeper) sdk.Invariant {
return func(ctx sdk.Context) (string, bool) {
states := k.GetAllStates(ctx)
for _, state := range states {
if err := state.IsNegative(); err != nil {
return sdk.FormatInvariant(types.ModuleName, "nonnegative coin state", err.Error()), true
}
}
return sdk.FormatInvariant(types.ModuleName, "nonnegative coin state", "\tno negative coin states"), false
}
}
// StateSumBalanceCheckInvariant checks that sum on state equal module account balance
func StateSumBalanceCheckInvariant(k Keeper) sdk.Invariant {
return func(ctx sdk.Context) (string, bool) {
states := k.GetAllStates(ctx)
remainsSum, err := types.StateSumIsInteger(states)
if err != nil {
return sdk.FormatInvariant(types.ModuleName, "state sum balance check", err.Error()), true
}
var broken bool
distributorAccountCoins := k.GetAccountCoinsForModuleAccount(ctx, types.DistributorMainAccount)
if remainsSum.IsZero() && distributorAccountCoins.IsZero() {
ctx.Logger().Debug("Coin state and distributor account is empty possible start of blockchain")
broken = false
} else {
broken = !remainsSum.IsEqual(distributorAccountCoins)
}
return sdk.FormatInvariant(types.ModuleName, "state sum balance check",
fmt.Sprintf(
"\tsum of states coins: %v\n"+
"\tdistributor account balance: %v",
remainsSum, distributorAccountCoins)), broken
}
}