从async.waterfall调用外部函数

Question

我对JS有点陌生，并且使用现有的分叉库(这个库非常复杂，文档也不多)--所以请容忍我。

我正在开发一个挖掘池系统，特别是添加了一个功能，用户可以在其中设置一个自定义支付金额，而不是较低的池限制。我已经将用户工作者地址的值写入redis中了。

我现在要做的是添加逻辑，以便：

1. 使用工作过的员工地址查看他们是否设置了自定义支付值(下面是我的外部函数)
2. 如果设置好了，就需要一些逻辑来确定是否应该立即支付或将其添加到余额中。

现有的瀑布脚本如下：https://github.com/mardock2009/Ravencoin-Pool/blob/master/libs/paymentProcessor.js#L575

在瀑布之前，我添加了一个类似于此的函数(我尝试过多次迭代)：

getCustomPayoutAmount = function(worker, cback) {
    var logger = loggerFactory.getLogger('PaymentProcessing', 'getCustomPayoutAmount');

    var redisClient = redis.createClient(portalConfig.redis.port, portalConfig.redis.host);             
    logger.debug('Getting custom Payout for worker: %s', worker);
    var payoutAmount = new BigNumber(0);

    redisClient.hget('ravencoin:workers:customPayoutAmount', worker,  function(error, result) {
        if (error) {
            logger.error('Error getCustomPayoutAmount: %s', error);
            payoutAmount = 0;
        }
        logger.debug('Got custom payout amount for worker: %s, Payout Amount: %s', worker, result);
        if (result > 10) {
            payoutAmount = new BigNumber(result);
            logger.debug('Parsed Float Amount: %s', payoutAmount);
        } else {
            logger.debug('Else lower than: %s', payoutAmount);
            payoutAmount = new BigNumber(0);
        }       
    });
    cback( new BigNumber(payoutAmount));    
};

然后在第575号线，我打电话给它(也许？)：

                    var customPayoutAmount = new BigNumber(0);

                    getCustomPayoutAmount(worker, function(returnCustomPayoutAmount) {
                        logger.debug('Callback customPayoutAmount = %s', returnCustomPayoutAmount);
                        customPayoutAmount = returnCustomPayoutAmount;
                    });

                    logger.debug('PP> customPayoutAmount = %s', customPayoutAmount);

然后，最后，一些if/elseif逻辑来处理不同的情况：

if (toSend.isGreaterThanOrEqualTo(minPayment)) {

                        if (toSend.isGreaterThanOrEqualTo(customPayoutAmount) && !customPayoutAmount.isZero()) {
                            //Amount Sent is higher than the custom amount set for this worker. Pay it out.
                            logger.debug('PP> Worker %s have their custom minimum payout amount: (%s above minimum %s)', w, toSend.toString(10), customPayoutAmount.toString(10));
                            totalSent = totalSent.plus(toSend);              
                            logger.debug('PP> totalSent = %s', totalSent.toString(10));
                            var address = worker.address = (worker.address || getProperAddress(w));              
                            logger.debug('PP> address = %s', address);
                            worker.sent = addressAmounts[address] = toSend;
                            logger.debug('PP> worker.sent = %s', worker.sent.toString(10));
                            worker.balanceChange = BigNumber.min(worker.balance, worker.sent).multipliedBy(new BigNumber(-1));
                            logger.debug('PP> worker.balanceChange = %s', worker.balanceChange.toString(10));

                        } else if (toSend.isLessThan(customPayoutAmount) && !customPayoutAmount.isZero()){
                            //Amount is higher than the minimum payment but not higher than the custom amount set for this worker. Add it to their balance.
                            //Did not meet the pool minimum, no custom amount. Add to balance.
                            logger.debug('PP> Worker %s have not reached minimum payout from their custom set payout amount threshold %s', w, customPayoutAmount.toString(10));
                            worker.balanceChange = BigNumber.max(toSend.minus(worker.balance), new BigNumber(0));
                            logger.debug('PP> worker.balanceChange = %s', worker.balanceChange.toString(10));
                            worker.sent = new BigNumber(0);
                            logger.debug('PP> worker.sent = %s', worker.sent.toString(10));
                            if (worker.balanceChange > 0) {
                                if (balanceAmounts[address] != null && balanceAmounts[address].isGreaterThan(0)) {
                                    balanceAmounts[address] = balanceAmounts[address].plus(worker.balanceChange);
                                } else {
                                    balanceAmounts[address] = worker.balanceChange;
                                }
                            }
                        }
                        
                        if (toSend.isGreaterThanOrEqualTo(minPayment) && customPayoutAmount.isZero()) {
                            //Meets the pool minimum payment, no custom amount. Pay out based on the pool minimum payment.
                            logger.debug('PP> Worker %s have reached minimum payout threshold (%s above minimum %s)', w, toSend.toString(10), minPayment.toString(10));
                            totalSent = totalSent.plus(toSend);              
                            logger.debug('PP> totalSent = %s', totalSent.toString(10));
                            var address = worker.address = (worker.address || getProperAddress(w));              
                            logger.debug('PP> address = %s', address);
                            worker.sent = addressAmounts[address] = toSend;
                            logger.debug('PP> worker.sent = %s', worker.sent.toString(10));
                            worker.balanceChange = BigNumber.min(worker.balance, worker.sent).multipliedBy(new BigNumber(-1));
                            logger.debug('PP> worker.balanceChange = %s', worker.balanceChange.toString(10));
                        }

                        
                    } else {
                        //Did not meet the pool minimum, no custom amount. Add to balance.
                        logger.debug('PP> Worker %s have not reached minimum payout threshold %s', w, minPayment.toString(10));
                        worker.balanceChange = BigNumber.max(toSend.minus(worker.balance), new BigNumber(0));
                        logger.debug('PP> worker.balanceChange = %s', worker.balanceChange.toString(10));
                        worker.sent = new BigNumber(0);
                        logger.debug('PP> worker.sent = %s', worker.sent.toString(10));
                        if (worker.balanceChange > 0) {
                            if (balanceAmounts[address] != null && balanceAmounts[address].isGreaterThan(0)) {
                                balanceAmounts[address] = balanceAmounts[address].plus(worker.balanceChange);
                            } else {
                                balanceAmounts[address] = worker.balanceChange;
                            }
                        }
                    }

我面临的主要问题是，我无法从瀑布内部的redis那里得到价值。我假设是因为它是异步的，andIi没有编写异步代码--这也会导致它在需要值时不一定按顺序运行。

再说一遍，我知道这是个烂摊子，我可能搞错了，所以希望有人能对这位可怜的菜鸟有所了解。

Answer 1

您可以使用async.each()

​

function(workers, rounds, addressAccount, callback) {
  var trySend = function(withholdPercent) {
    ...
    async.each(workers, function(worker, callback) {
      ...
      getCustomPayoutAmount(worker, function(customPayoutAmount) {
        ...
        if (toSend.isGreaterThanOrEqualTo(minPayment)) {
          if (toSend.isGreaterThanOrEqualTo(customPayoutAmount) && !customPayoutAmount.isZero()) {
            ...
          }
          ...
        }
        callback();
      });
    })
    .then(function() {
      if (Object.keys(addressAmounts).length === 0) {
        logger.info('PP> No workers was chosen for paying out');
        callback(null, workers, rounds, []);
        return;
      }
      ...
      daemon.cmd('sendmany', [addressAccount || '', addressAmounts, 1, ""], function(result) {
        ...
      }
    });
  };
  trySend(new BigNumber(0);
}

​

而在'getCustomPayoutAmount‘中，’cback()‘应该在'redisClient.hget()’的回调中调用，如下所示

​

getCustomPayoutAmount = function(worker, cback) {
    ...

    redisClient.hget('ravencoin:workers:customPayoutAmount', worker,  function(error, result) {
        ...
        cback(payoutAmount);   
    });
     
};

​