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key_transfer_confirmation.go
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key_transfer_confirmation.go
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package evm
import (
"context"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/ethereum/go-ethereum/common"
geth "github.com/ethereum/go-ethereum/core/types"
"github.com/axelarnetwork/axelar-core/x/evm/types"
voteTypes "github.com/axelarnetwork/axelar-core/x/vote/types"
)
// ProcessTransferKeyConfirmation votes on the correctness of an EVM chain key transfer
func (mgr Mgr) ProcessTransferKeyConfirmation(event *types.ConfirmKeyTransferStarted) error {
if !mgr.isParticipantOf(event.Participants) {
mgr.logger("pollID", event.PollID).Debug("ignoring key transfer confirmation poll: not a participant")
return nil
}
var vote *voteTypes.VoteRequest
txReceipt, err := mgr.GetTxReceiptIfFinalized(event.Chain, common.Hash(event.TxID), event.ConfirmationHeight)
if err != nil {
return err
}
if txReceipt.Err() != nil {
vote = voteTypes.NewVoteRequest(mgr.proxy, event.PollID, types.NewVoteEvents(event.Chain))
mgr.logger().Infof("broadcasting empty vote for poll %s: %s", event.PollID.String(), txReceipt.Err().Error())
} else {
events := mgr.processTransferKeyLogs(event, txReceipt.Ok().Logs)
vote = voteTypes.NewVoteRequest(mgr.proxy, event.PollID, types.NewVoteEvents(event.Chain, events...))
mgr.logger().Infof("broadcasting vote %v for poll %s", events, event.PollID.String())
}
_, err = mgr.broadcaster.Broadcast(context.TODO(), vote)
return err
}
func (mgr Mgr) processTransferKeyLogs(event *types.ConfirmKeyTransferStarted, logs []*geth.Log) []types.Event {
for i := len(logs) - 1; i >= 0; i-- {
txlog := logs[i]
if txlog.Topics[0] != MultisigTransferOperatorshipSig {
continue
}
// Event is not emitted by the axelar gateway
if txlog.Address != common.Address(event.GatewayAddress) {
continue
}
transferOperatorshipEvent, err := DecodeMultisigOperatorshipTransferredEvent(txlog)
if err != nil {
mgr.logger().Debug(sdkerrors.Wrap(err, "failed decoding operatorship transferred event").Error())
continue
}
if err := transferOperatorshipEvent.ValidateBasic(); err != nil {
mgr.logger().Debug(sdkerrors.Wrap(err, "invalid event MultisigTransferOperatorship").Error())
continue
}
return []types.Event{{Chain: event.Chain,
TxID: event.TxID,
Index: uint64(i),
Event: &types.Event_MultisigOperatorshipTransferred{
MultisigOperatorshipTransferred: &transferOperatorshipEvent,
},
}}
}
return []types.Event{}
}