diff --git a/lib/bcoin/txdb.js b/lib/bcoin/txdb.js
index b5a2f5a2..e354aaf2 100644
--- a/lib/bcoin/txdb.js
+++ b/lib/bcoin/txdb.js
@@ -281,71 +281,19 @@ TXPool.prototype._add = function add(tx, map, callback, force) {
     unlock();
     if (callback)
       callback(err, result);
-  };
+  }
 
-  this.getTX(hash, function(err, existing) {
+  // Attempt to confirm tx before adding it.
+  this._confirm(tx, map, function(err, existing) {
     if (err)
       return done(err);
 
+    // Ignore if we already have this tx.
+    if (existing)
+      return done(null, true);
+
     batch = self.db.batch();
 
-    if (existing) {
-      // Tricky - update the tx and coin in storage,
-      // and remove pending flag to mark as confirmed.
-      if (existing.ts === 0 && tx.ts !== 0) {
-        assert(tx.height >= 0);
-        assert(existing.ps > 0);
-
-        batch.put(prefix + 't/t/' + hash, tx.toExtended());
-        batch.del(prefix + 't/p/t/' + hash);
-        batch.put(prefix + 't/h/h/' + pad32(tx.height) + '/' + hash, DUMMY);
-        batch.del(prefix + 't/s/s/' + pad32(existing.ps) + '/' + hash);
-        batch.put(prefix + 't/s/s/' + pad32(tx.ts) + '/' + hash, DUMMY);
-
-        map.all.forEach(function(id) {
-          batch.del(prefix + 't/p/a/' + id + '/' + hash);
-          batch.put(
-            prefix + 't/h/a/' + id + '/' + pad32(tx.height) + '/' + hash, DUMMY);
-          batch.del(
-            prefix + 't/s/a/' + id + '/' + pad32(existing.ps) + '/' + hash);
-          batch.put(
-            prefix + 't/s/a/' + id + '/' + pad32(tx.ts) + '/' + hash, DUMMY);
-        });
-
-        utils.forEachSerial(tx.outputs, function(output, next, i) {
-          self.getCoin(hash, i, function(err, coin) {
-            if (err)
-              return next(err);
-
-            if (!coin)
-              return next();
-
-            coin.height = tx.height;
-
-            batch.put(prefix + 'u/t/' + hash + '/' + i, coin.toRaw());
-
-            next();
-          });
-        }, function(err) {
-          if (err)
-            return done(err);
-
-          batch.write(function(err) {
-            if (err)
-              return done(err);
-
-            self.emit('confirmed', tx, map);
-            self.emit('tx', tx, map);
-
-            return done(null, true);
-          });
-        });
-
-        return;
-      }
-      return done(null, false);
-    }
-
     batch.put(prefix + 't/t/' + hash, tx.toExtended());
 
     if (tx.ts === 0) {
@@ -547,6 +495,85 @@ TXPool.prototype._add = function add(tx, map, callback, force) {
   });
 };
 
+TXPool.prototype._confirm = function _confirm(tx, map, callback) {
+  var self = this;
+  var prefix = this.prefix + '/';
+  var hash = tx.hash('hex');
+  var batch;
+
+  this.getTX(hash, function(err, existing) {
+    if (err)
+      return callback(err);
+
+    // Haven't seen this tx before, add it.
+    if (!existing)
+      return callback(null, false);
+
+    // Existing tx is already confirmed. Ignore.
+    if (existing.ts !== 0)
+      return callback(null, true);
+
+    // The incoming tx won't confirm the existing one anyway. Ignore.
+    if (tx.ts === 0)
+      return callback(null, true);
+
+    batch = self.db.batch();
+
+    // Tricky - update the tx and coin in storage,
+    // and remove pending flag to mark as confirmed.
+    assert(tx.height >= 0);
+    assert(existing.ps > 0);
+
+    batch.put(prefix + 't/t/' + hash, tx.toExtended());
+    batch.del(prefix + 't/p/t/' + hash);
+    batch.put(prefix + 't/h/h/' + pad32(tx.height) + '/' + hash, DUMMY);
+    batch.del(prefix + 't/s/s/' + pad32(existing.ps) + '/' + hash);
+    batch.put(prefix + 't/s/s/' + pad32(tx.ts) + '/' + hash, DUMMY);
+
+    map.all.forEach(function(id) {
+      batch.del(prefix + 't/p/a/' + id + '/' + hash);
+      batch.put(prefix + 't/h/a/' + id + '/' + pad32(tx.height) + '/' + hash, DUMMY);
+      batch.del(prefix + 't/s/a/' + id + '/' + pad32(existing.ps) + '/' + hash);
+      batch.put(prefix + 't/s/a/' + id + '/' + pad32(tx.ts) + '/' + hash, DUMMY);
+    });
+
+    utils.forEachSerial(tx.outputs, function(output, next, i) {
+      var address = output.getAddress();
+
+      // Only update coins if this output is ours.
+      if (!address || !map[address].length)
+        return next();
+
+      self.getCoin(hash, i, function(err, coin) {
+        if (err)
+          return next(err);
+
+        if (!coin)
+          return next();
+
+        coin.height = tx.height;
+
+        batch.put(prefix + 'u/t/' + hash + '/' + i, coin.toRaw());
+
+        next();
+      });
+    }, function(err) {
+      if (err)
+        return callback(err);
+
+      batch.write(function(err) {
+        if (err)
+          return callback(err);
+
+        self.emit('confirmed', tx, map);
+        self.emit('tx', tx, map);
+
+        return callback(null, true);
+      });
+    });
+  });
+};
+
 TXPool.prototype.remove = function remove(hash, callback) {
   var self = this;
 
@@ -640,14 +667,15 @@ TXPool.prototype._remove = function remove(tx, map, callback) {
       if (!input.output)
         return;
 
-      if (address) {
-        map[address].forEach(function(id) {
-          batch.put(prefix + 'u/a/' + id
-            + '/' + input.prevout.hash
-            + '/' + input.prevout.index,
-            DUMMY);
-        });
-      }
+      if (!address || !map[address].length)
+        return;
+
+      map[address].forEach(function(id) {
+        batch.put(prefix + 'u/a/' + id
+          + '/' + input.prevout.hash
+          + '/' + input.prevout.index,
+          DUMMY);
+      });
 
       batch.put(prefix + 'u/t/'
         + input.prevout.hash
@@ -660,11 +688,12 @@ TXPool.prototype._remove = function remove(tx, map, callback) {
     tx.outputs.forEach(function(output, i) {
       var address = output.getAddress();
 
-      if (address) {
-        map[address].forEach(function(id) {
-          batch.del(prefix + 'u/a/' + id + '/' + hash + '/' + i);
-        });
-      }
+      if (!address || !map[address].length)
+        return;
+
+      map[address].forEach(function(id) {
+        batch.del(prefix + 'u/a/' + id + '/' + hash + '/' + i);
+      });
 
       batch.del(prefix + 'u/t/' + hash + '/' + i);
     });
@@ -680,78 +709,6 @@ TXPool.prototype._remove = function remove(tx, map, callback) {
   });
 };
 
-TXPool.prototype._confirm = function _confirm(tx, map, callback) {
-  var self = this;
-  var prefix = this.prefix + '/';
-  var hash = tx.hash('hex');
-  var height = tx.height;
-  var ts = tx.ts;
-  var batch;
-
-  this.getTX(hash, function(err, existing) {
-    if (err)
-      return done(err);
-
-    batch = self.db.batch();
-
-    if (!existing)
-      return callback(null, false);
-
-    if (!(existing.ts === 0 && tx.ts !== 0))
-      return callback(null, true);
-
-    // Tricky - update the tx and coin in storage,
-    // and remove pending flag to mark as confirmed.
-    assert(tx.height >= 0);
-    assert(existing.ps > 0);
-
-    batch.put(prefix + 't/t/' + hash, tx.toExtended());
-    batch.del(prefix + 't/p/t/' + hash);
-    batch.put(prefix + 't/h/h/' + pad32(tx.height) + '/' + hash, DUMMY);
-    batch.del(prefix + 't/s/s/' + pad32(existing.ps) + '/' + hash);
-    batch.put(prefix + 't/s/s/' + pad32(tx.ts) + '/' + hash, DUMMY);
-
-    map.all.forEach(function(id) {
-      batch.del(prefix + 't/p/a/' + id + '/' + hash);
-      batch.put(
-        prefix + 't/h/a/' + id + '/' + pad32(tx.height) + '/' + hash, DUMMY);
-      batch.del(
-        prefix + 't/s/a/' + id + '/' + pad32(existing.ps) + '/' + hash);
-      batch.put(
-        prefix + 't/s/a/' + id + '/' + pad32(tx.ts) + '/' + hash, DUMMY);
-    });
-
-    utils.forEachSerial(tx.outputs, function(output, next, i) {
-      self.getCoin(hash, i, function(err, coin) {
-        if (err)
-          return next(err);
-
-        if (!coin)
-          return next();
-
-        coin.height = tx.height;
-
-        batch.put(prefix + 'u/t/' + hash + '/' + i, coin.toRaw());
-
-        next();
-      });
-    }, function(err) {
-      if (err)
-        return done(err);
-
-      batch.write(function(err) {
-        if (err)
-          return done(err);
-
-        self.emit('confirmed', tx, map);
-        self.emit('tx', tx, map);
-
-        return callback(null, true);
-      });
-    });
-  });
-};
-
 TXPool.prototype.unconfirm = function unconfirm(hash, callback) {
   var self = this;
 
@@ -823,6 +780,9 @@ TXPool.prototype._unconfirm = function unconfirm(tx, map, callback) {
       if (!coin)
         return next();
 
+      if (!address || !map[address].length)
+        return next();
+
       coin.height = tx.height;
 
       batch.put(prefix + 'u/t/' + hash + '/' + i, coin.toRaw());