reduce highWaterMark on wallet export stream

lib/services/wallet-api/index.js

@@ -714,15 +714,15 @@ WalletService.prototype._endpointGetTransactions = function() {
         };
 
         var missingTxidCount = 0;
-        var transform = new Transform({ objectMode: true, highWaterMark: 1000000 });
+        var txStream = new Transform({ objectMode: true, highWaterMark: 100 });
         //txids are sent in and the actual tx's are found here
-        transform._transform = function(chunk, enc, callback) {
+        txStream._transform = function(chunk, enc, callback) {
 
           var txid = self._encoding.decodeWalletTransactionKey(chunk).txid.toString('hex');
 
 	  if (txid.length !== 64 || txid === '0000000000000000000000000000000000000000000000000000000000000000') {
             missingTxidCount++;
-	    log.error('missingTxidCount: ', missingTxidCount);
+            txStream.emit('error', new Error('Chunk: ' + chunk.toString('hex') + ' did not contain a txid.'));
 	    return callback();
           }
 
@@ -730,31 +730,38 @@ WalletService.prototype._endpointGetTransactions = function() {
 
             if(err) {
               log.error(err);
-	      transform.unpipe();
+              txStream.emit('error', err);
               return callback();
             }
 
             var formattedTx = utils.toJSONL(self._formatTransaction(tx));
-            transform.push(formattedTx);
+            txStream.push(formattedTx);
             callback();
 
           });
 
         };
 
-        transform._flush = function(callback) {
+        txStream.on('error', function(err) {
+          log.error(err);
+          utils.sendError(err, res);
+          txStream.unpipe();
+        });
+
+        txStream._flush = function(callback) {
           self.db.resumeSync();
           callback();
         };
 
         var encodingFn = self._encoding.encodeWalletTransactionKey.bind(self._encoding);
-        var stream = self.db.createKeyStream(self._getSearchParams(encodingFn, options));
+        var dbStream = self.db.createKeyStream(self._getSearchParams(encodingFn, options));
 
-	stream.on('close', function() {
+	dbStream.on('close', function() {
-	  stream.unpipe(); 
+	  dbStream.unpipe();
 	});
 
-        stream.pipe(transform).pipe(res);
+        dbStream.pipe(txStream).pipe(res);
+
       });
     });
   };
@@ -1392,4 +1399,3 @@ WalletService.prototype.getRoutePrefix = function() {
 };
 
 module.exports = WalletService;
-

regtest/utils.js

@@ -76,16 +76,6 @@ utils.waitForBitcoreNode = function(opts, callback) {
 
   var self = this;
 
-  opts.bitcore.process.stdout.on('data', function(data) {
-    if (opts.debug) {
-      console.log(data.toString());
-    }
-  });
-
-  opts.bitcore.process.stderr.on('data', function(data) {
-    console.log(data.toString());
-  });
-
   var errorFilter = function(err, res) {
     try {
       var info = JSON.parse(res);
@@ -153,7 +143,22 @@ utils.initializeAndStartService = function(opts, callback) {
 };
 
 utils.startBitcoreNode = function(opts, callback) {
-  this.initializeAndStartService(opts.bitcore, callback);
+  this.initializeAndStartService(opts.bitcore, function(err) {
+    if (err) {
+      return callback(err);
+    }
+
+    opts.bitcore.process.stdout.on('data', function(data) {
+      if (opts.debug) {
+        process.stdout.write(data.toString());
+      }
+    });
+
+    opts.bitcore.process.stderr.on('data', function(data) {
+      process.stderr.write(data.toString());
+    });
+    callback();
+  });
 };
 
 utils.startBitcoind = function(opts, callback) {
@@ -341,6 +346,7 @@ utils.getListOfTxs = function(opts, callback) {
     path: '/wallet-api/wallets/' + opts.walletId + '/transactions?start=0&end=' + end });
 
   self.queryBitcoreNode(httpOpts, function(err, res) {
+
     if(err) {
       return callback(err);
     }