public void Update(IExchangeEventEntity entity)
{
switch (entity.Type)
{
case ExchangeEventType.TokenPurchase:
EthLiquidity = EthLiquidity + entity.EthAmount;
TokenLiquidity = TokenLiquidity - entity.TokenAmount;
break;
case ExchangeEventType.EthPurchase:
EthLiquidity = EthLiquidity - entity.EthAmount;
TokenLiquidity = TokenLiquidity + entity.TokenAmount;
break;
case ExchangeEventType.AddLiquidity:
EthLiquidity = EthLiquidity + entity.EthAmount;
TokenLiquidity = TokenLiquidity + entity.TokenAmount;
break;
case ExchangeEventType.RemoveLiquidity:
EthLiquidity = EthLiquidity - entity.EthAmount;
TokenLiquidity = TokenLiquidity - entity.TokenAmount;
break;
}
}
public async Task AddOrUpdateAsync(IExchangeEventEntity entity)
{
await _collection.FindOneAndReplaceAsync <MongoExchangeEventEntity>(
e => e.Id.Equals(entity.Id), (MongoExchangeEventEntity)entity,
new FindOneAndReplaceOptions <MongoExchangeEventEntity> {
IsUpsert = true
});
}
private ExchangeEvent Map(IExchangeEventEntity entity)
{
var exchangeEvent = new ExchangeEvent();
switch (entity.Type)
{
case ExchangeEventType.EthPurchase:
exchangeEvent.EthAmount = -entity.EthAmount;
exchangeEvent.TokenAmount = entity.TokenAmount;
break;
case ExchangeEventType.TokenPurchase:
exchangeEvent.EthAmount = entity.EthAmount;
exchangeEvent.TokenAmount = -entity.TokenAmount;
break;
case ExchangeEventType.AddLiquidity:
exchangeEvent.EthAmount = entity.EthAmount;
exchangeEvent.TokenAmount = entity.TokenAmount;
break;
case ExchangeEventType.RemoveLiquidity:
exchangeEvent.EthAmount = -entity.EthAmount;
exchangeEvent.TokenAmount = -entity.TokenAmount;
break;
default:
throw new ArgumentException("Unknown event type", nameof(entity.Type));
}
exchangeEvent.Block = entity.BlockNumber;
exchangeEvent.Event = entity.Type;
exchangeEvent.Timestamp = entity.Timestamp.ToUnixTimestamp();
exchangeEvent.Tx = entity.TxHash;
exchangeEvent.User = entity.CallerAddress;
exchangeEvent.Fee = entity.EthFee;
return(exchangeEvent);
}
private bool IsEthOrTokenPurchaseEvent(IExchangeEventEntity entity)
{
return(entity.Type == ExchangeEventType.EthPurchase || entity.Type == ExchangeEventType.TokenPurchase);
}
