79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
package keeper
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import (
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"context"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/crisis/types"
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)
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var _ types.MsgServer = Keeper{}
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func (k Keeper) VerifyInvariant(goCtx context.Context, msg *types.MsgVerifyInvariant) (*types.MsgVerifyInvariantResponse, error) {
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ctx := sdk.UnwrapSDKContext(goCtx)
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constantFee := sdk.NewCoins(k.GetConstantFee(ctx))
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sender, err := sdk.AccAddressFromBech32(msg.Sender)
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if err != nil {
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return nil, err
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}
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if err := k.SendCoinsFromAccountToFeeCollector(ctx, sender, constantFee); err != nil {
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return nil, err
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}
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// use a cached context to avoid gas costs during invariants
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cacheCtx, _ := ctx.CacheContext()
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found := false
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msgFullRoute := msg.FullInvariantRoute()
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var res string
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var stop bool
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for _, invarRoute := range k.Routes() {
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if invarRoute.FullRoute() == msgFullRoute {
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res, stop = invarRoute.Invar(cacheCtx)
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found = true
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break
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}
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}
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if !found {
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return nil, types.ErrUnknownInvariant
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}
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if stop {
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// NOTE currently, because the chain halts here, this transaction will never be included
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// in the blockchain thus the constant fee will have never been deducted. Thus no
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// refund is required.
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// TODO uncomment the following code block with implementation of the circuit breaker
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//// refund constant fee
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//err := k.distrKeeper.DistributeFromFeePool(ctx, constantFee, msg.Sender)
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//if err != nil {
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//// if there are insufficient coins to refund, log the error,
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//// but still halt the chain.
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//logger := ctx.Logger().With("module", "x/crisis")
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//logger.Error(fmt.Sprintf(
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//"WARNING: insufficient funds to allocate to sender from fee pool, err: %s", err))
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//}
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// TODO replace with circuit breaker
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panic(res)
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}
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeInvariant,
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sdk.NewAttribute(types.AttributeKeyRoute, msg.InvariantRoute),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCrisis),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.Sender),
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),
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})
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return &types.MsgVerifyInvariantResponse{}, nil
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}
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