/
vote_handler.go
259 lines (212 loc) · 7.72 KB
/
vote_handler.go
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package keeper
import (
"fmt"
"github.com/CosmWasm/wasmd/x/wasm"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/axelarnetwork/axelar-core/utils/events"
"github.com/axelarnetwork/axelar-core/x/evm/types"
nexus "github.com/axelarnetwork/axelar-core/x/nexus/exported"
tss "github.com/axelarnetwork/axelar-core/x/tss/exported"
vote "github.com/axelarnetwork/axelar-core/x/vote/exported"
"github.com/axelarnetwork/utils/funcs"
)
var _ vote.VoteHandler = &voteHandler{}
type voteHandler struct {
cdc codec.Codec
keeper types.BaseKeeper
nexus types.Nexus
rewarder types.Rewarder
}
// NewVoteHandler returns the handler for processing vote delivered by the vote module
func NewVoteHandler(cdc codec.Codec, keeper types.BaseKeeper, nexus types.Nexus, rewarder types.Rewarder) vote.VoteHandler {
return voteHandler{
cdc: cdc,
keeper: keeper,
nexus: nexus,
rewarder: rewarder,
}
}
func (v voteHandler) HandleFailedPoll(ctx sdk.Context, poll vote.Poll) error {
md := mustGetMetadata(poll)
events.Emit(ctx, &types.PollFailed{
TxID: md.TxID,
Chain: md.Chain,
PollID: poll.GetID(),
})
return nil
}
func (v voteHandler) IsFalsyResult(result codec.ProtoMarshaler) bool {
return len(result.(*types.VoteEvents).Events) == 0
}
func (v voteHandler) HandleExpiredPoll(ctx sdk.Context, poll vote.Poll) error {
rewardPoolName, ok := poll.GetRewardPoolName()
if !ok {
return fmt.Errorf("reward pool not set for poll %s", poll.GetID().String())
}
md := mustGetMetadata(poll)
rewardPool := v.rewarder.GetPool(ctx, rewardPoolName)
chain, ok := v.nexus.GetChain(ctx, md.Chain)
if !ok {
return fmt.Errorf("%s is not a registered chain", md.Chain)
}
// Penalize voters who failed to vote
for _, voter := range poll.GetVoters() {
hasVoted := poll.HasVoted(voter)
if maintainerState, ok := v.nexus.GetChainMaintainerState(ctx, chain, voter); ok {
maintainerState.MarkMissingVote(!hasVoted)
funcs.MustNoErr(v.nexus.SetChainMaintainerState(ctx, maintainerState))
v.keeper.Logger(ctx).Debug(fmt.Sprintf("marked voter %s behaviour", voter.String()),
"voter", voter.String(),
"missing_vote", !hasVoted,
"poll", poll.GetID().String(),
)
}
if !hasVoted {
rewardPool.ClearRewards(voter)
v.keeper.Logger(ctx).Debug(fmt.Sprintf("penalized voter %s due to timeout", voter.String()),
"voter", voter.String(),
"poll", poll.GetID().String())
}
}
events.Emit(ctx, &types.PollExpired{
TxID: md.TxID,
Chain: md.Chain,
PollID: poll.GetID(),
})
return nil
}
func (v voteHandler) HandleCompletedPoll(ctx sdk.Context, poll vote.Poll) error {
voteEvents := poll.GetResult().(*types.VoteEvents)
chain, ok := v.nexus.GetChain(ctx, voteEvents.Chain)
if !ok {
return fmt.Errorf("%s is not a registered chain", voteEvents.Chain)
}
rewardPoolName, ok := poll.GetRewardPoolName()
if !ok {
return fmt.Errorf("reward pool not set for poll %s", poll.GetID().String())
}
rewardPool := v.rewarder.GetPool(ctx, rewardPoolName)
for _, voter := range poll.GetVoters() {
maintainerState, ok := v.nexus.GetChainMaintainerState(ctx, chain, voter)
if !ok {
continue // voter is no longer a chain maintainer, so recording the state is irrelevant
}
hasVoted := poll.HasVoted(voter)
hasVotedIncorrectly := hasVoted && !poll.HasVotedCorrectly(voter)
maintainerState.MarkMissingVote(!hasVoted)
maintainerState.MarkIncorrectVote(hasVotedIncorrectly)
funcs.MustNoErr(v.nexus.SetChainMaintainerState(ctx, maintainerState))
v.keeper.Logger(ctx).Debug(fmt.Sprintf("marked voter %s behaviour", voter.String()),
"voter", voter.String(),
"missing_vote", !hasVoted,
"incorrect_vote", hasVotedIncorrectly,
"poll", poll.GetID().String(),
)
switch {
case hasVotedIncorrectly, !hasVoted:
rewardPool.ClearRewards(voter)
v.keeper.Logger(ctx).Debug(fmt.Sprintf("penalized voter %s due to incorrect vote or missing vote", voter.String()),
"voter", voter.String(),
"poll", poll.GetID().String())
default:
if err := rewardPool.ReleaseRewards(voter); err != nil {
return err
}
v.keeper.Logger(ctx).Debug(fmt.Sprintf("released rewards for voter %s", voter.String()),
"voter", voter.String(),
"poll", poll.GetID().String())
}
}
md := mustGetMetadata(poll)
if v.IsFalsyResult(voteEvents) {
events.Emit(ctx, &types.NoEventsConfirmed{
TxID: md.TxID,
Chain: md.Chain,
PollID: poll.GetID(),
})
}
events.Emit(ctx, &types.PollCompleted{
TxID: md.TxID,
Chain: md.Chain,
PollID: poll.GetID(),
})
return nil
}
func (v voteHandler) HandleResult(ctx sdk.Context, result codec.ProtoMarshaler) error {
voteEvents := result.(*types.VoteEvents)
if v.IsFalsyResult(result) {
return nil
}
chain, ok := v.nexus.GetChain(ctx, voteEvents.Chain)
if !ok {
return fmt.Errorf("%s is not a registered chain", voteEvents.Chain)
}
ck, err := v.keeper.ForChain(ctx, chain.Name)
if err != nil {
return fmt.Errorf("%s is not an evm chain", voteEvents.Chain)
}
for _, event := range voteEvents.Events {
if err := v.handleEvent(ctx, ck, event, chain); err != nil {
return err
}
}
return nil
}
func (v voteHandler) handleEvent(ctx sdk.Context, ck types.ChainKeeper, event types.Event, chain nexus.Chain) error {
if err := ck.SetConfirmedEvent(ctx, event); err != nil {
return err
}
// Event_ContractCall is no longer directly handled by the EVM module,
// which bypassed nexus routing
switch event.GetEvent().(type) {
case *types.Event_ContractCall:
if err := v.handleContractCall(ctx, ck, event); err != nil {
return err
}
default:
funcs.MustNoErr(ck.EnqueueConfirmedEvent(ctx, event.GetID()))
}
ck.Logger(ctx).Info(fmt.Sprintf("confirmed %s event %s in transaction %s", chain.Name, event.GetID(), event.TxID.Hex()))
// Deprecated
ctx.EventManager().EmitEvent(
sdk.NewEvent(types.EventTypeEventConfirmation,
sdk.NewAttribute(sdk.AttributeKeyModule, types.ModuleName),
sdk.NewAttribute(types.AttributeKeyChain, event.Chain.String()),
sdk.NewAttribute(types.AttributeKeyTxID, event.TxID.Hex()),
sdk.NewAttribute(types.AttributeKeyEventID, string(event.GetID())),
sdk.NewAttribute(types.AttributeKeyEventType, event.GetEventType()),
sdk.NewAttribute(sdk.AttributeKeyAction, types.AttributeValueConfirm)),
)
return nil
}
func (v voteHandler) handleContractCall(ctx sdk.Context, ck types.ChainKeeper, event types.Event) error {
msg := mustToGeneralMessage(ctx, v.nexus, event)
if err := v.nexus.SetNewMessage(ctx, msg); err != nil {
return err
}
funcs.MustNoErr(v.nexus.EnqueueRouteMessage(ctx, msg.ID))
funcs.MustNoErr(ck.SetEventCompleted(ctx, event.GetID()))
return nil
}
func mustToGeneralMessage(ctx sdk.Context, n types.Nexus, event types.Event) nexus.GeneralMessage {
id := string(event.GetID())
contractCall := event.GetEvent().(*types.Event_ContractCall).ContractCall
sourceChain := funcs.MustOk(n.GetChain(ctx, event.Chain))
sender := nexus.CrossChainAddress{Chain: sourceChain, Address: contractCall.Sender.Hex()}
destinationChain, ok := n.GetChain(ctx, contractCall.DestinationChain)
if !ok {
// try forwarding it to wasm router if destination chain is not registered
destinationChain = nexus.Chain{Name: contractCall.DestinationChain, SupportsForeignAssets: false, KeyType: tss.None, Module: wasm.ModuleName}
}
recipient := nexus.CrossChainAddress{Chain: destinationChain, Address: contractCall.ContractAddress}
return nexus.NewGeneralMessage(id, sender, recipient, contractCall.PayloadHash.Bytes(), event.TxID.Bytes(), event.Index, nil)
}
func mustGetMetadata(poll vote.Poll) types.PollMetadata {
md := funcs.MustOk(poll.GetMetaData())
metadata, ok := md.(*types.PollMetadata)
if !ok {
panic(fmt.Sprintf("poll metadata should be of type %T", &types.PollMetadata{}))
}
return *metadata
}