synapsecns/sanguine

package testmetaswap

import (
    "bytes"
    "github.com/ethereum/go-ethereum/accounts/abi"
    "github.com/ethereum/go-ethereum/common"
    "github.com/synapsecns/sanguine/services/explorer/types/swap"
    "strings"
)

func init() {
    var err error
    parsedSwap, err := abi.JSON(strings.NewReader(TestMetaSwapMetaData.ABI))
    if err != nil {
        panic(err)
    }

    // we do this here to throw a compile error if the event is not found
    TokenSwapUnderlyingTopic = parsedSwap.Events["TokenSwapUnderlying"].ID
}

// TokenSwapUnderlyingTopic is the topic used for token swap underlying.
var TokenSwapUnderlyingTopic common.Hash

// TopicMap maps events to topics.
// this is returned as a function to assert immutability.
func TopicMap() map[swap.EventType]common.Hash {
    return map[swap.EventType]common.Hash{
        swap.TokenSwapUnderlyingEvent: TokenSwapUnderlyingTopic,
    }
}

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

// Topic gets the topic from the event type.
func Topic(eventType swap.EventType) common.Hash {
    topicHash, ok := TopicMap()[swap.EventType(eventType.Int())]
    if !ok {
        panic("unknown event")
    }
    return topicHash
}