synapsecns/sanguine

package inbox

import (
    "bytes"
    "strings"

    "github.com/ethereum/go-ethereum/accounts/abi"
    "github.com/ethereum/go-ethereum/common"
)

func init() {
    // set topics
    var err error

    parsedInbox, err := abi.JSON(strings.NewReader(InboxMetaData.ABI))
    if err != nil {
        panic(err)
    }

    SnapshotAcceptedTopic = parsedInbox.Events["SnapshotAccepted"].ID

    ReceiptAcceptedTopic = parsedInbox.Events["ReceiptAccepted"].ID

    if SnapshotAcceptedTopic == (common.Hash{}) {
        panic("SnapshotAcceptedTopic is nil")
    }
    if ReceiptAcceptedTopic == (common.Hash{}) {
        panic("ReceiptAcceptedTopic is nil")
    }
}

// SnapshotAcceptedTopic is the topic that gets emitted
// when the SnapshotAccepted event is called.
var SnapshotAcceptedTopic common.Hash

// ReceiptAcceptedTopic is the topic that gets emitted
// when the ReceiptAccepted event is called.
var ReceiptAcceptedTopic common.Hash

// topicMap maps events to topics.
// this is returned as a function to assert immutability.
func topicMap() map[EventType]common.Hash {
    return map[EventType]common.Hash{
        SnapshotAcceptedEvent: SnapshotAcceptedTopic,
        ReceiptAcceptedEvent:  ReceiptAcceptedTopic,
    }
}

// eventTypeFromTopic gets the event type from the topic
// returns nil if the topic is not found.
func eventTypeFromTopic(ogTopic common.Hash) *EventType {
    for eventType, topic := range topicMap() {
        if bytes.Equal(ogTopic.Bytes(), topic.Bytes()) {
            return &eventType
        }
    }
    return nil
}