diff --git a/lib/bcoin/txdb.js b/lib/bcoin/txdb.js
index f850cfee..c1aea19e 100644
--- a/lib/bcoin/txdb.js
+++ b/lib/bcoin/txdb.js
@@ -113,7 +113,7 @@ TXDB.prototype._testFilter = function _testFilter(addresses) {
 /**
  * Map a transactions' addresses to wallet IDs.
  * @param {TX} tx
- * @param {Function} callback - Returns [Error, {@link AddressMap}].
+ * @param {Function} callback - Returns [Error, {@link WalletMap}].
  */
 
 TXDB.prototype.getMap = function getMap(tx, callback) {
@@ -133,8 +133,6 @@ TXDB.prototype.getMap = function getMap(tx, callback) {
 
     map = WalletMap.fromTX(table, tx);
 
-    utils.print(map.toJSON());
-
     return callback(null, map);
   });
 };
@@ -1667,88 +1665,140 @@ TXDB.prototype.zap = function zap(id, age, callback, force) {
 //   }]
 //
 
-// What we need:
-// Table: Above.
-// All: uniqified paths by id/name
-// Outputs: Technically uniqified by ID, but id/name works too.
-
-// What they need (api):
-// outputs: [
-//   // Sum of value:
-//   { value: 0, id: wallet-id, name: account, index: account }
-// ]
-
 /**
  * WalletMap
  * @constructor
  * @private
  */
 
-function WalletMap(table) {
+function WalletMap() {
+  if (!(this instanceof WalletMap))
+    return new WalletMap();
+
   this.inputs = [];
   this.outputs = [];
-  this.paths = [];
-  this.accounts = null;
-  this.wallets = [];
+  this.accounts = [];
   this.table = null;
 }
 
 WalletMap.prototype.fromTX = function fromTX(table, tx) {
-  var keys = Object.keys(table);
-  var i, input, output, hash, members, member;
-  var j, key, paths, path;
+  var i, members, input, output, key;
 
-  // Flatten paths and push all of
-  // them onto the `paths` array.
-  for (i = 0; i < keys.length; i++) {
-    key = keys[i];
-    paths = table[key];
-    for (j = 0; j < paths.length; j++) {
-      path = paths[j];
-      this.wallets.push(path.id);
-      this.paths.push(path);
+  // This is a scary function, but what it is
+  // designed to do is uniqify inputs and
+  // outputs by account. This is easier said
+  // than done due to two facts: transactions
+  // can have multiple outputs with the same
+  // address, and wallets can have multiple
+  // accounts with the same address. On top
+  // of that, it will calculate the total
+  // value sent to or received from each
+  // account.
+
+  function insert(vector, target) {
+    var i, io, hash, members, member;
+    var j, paths, path, key, address, hashes;
+
+    // Keeps track of unique addresses.
+    hashes = {};
+
+    // Maps address hashes to members.
+    members = {};
+
+    for (i = 0; i < vector.length; i++) {
+      io = vector[i];
+      address = io.getAddress();
+
+      if (!address)
+        continue;
+
+      hash = address.getHash('hex');
+
+      // Get all paths for this address.
+      paths = table[hash];
+
+      for (j = 0; j < paths.length; j++) {
+        path = paths[j];
+        key = path.toKey();
+        member = members[key];
+
+        // We no doubt already created a member
+        // for this account, and not only that,
+        // we're guaranteed to be on a different
+        // input/output due to the fact that we
+        // add the address hash after this loop
+        // completes. Now we can update the value.
+        if (hashes[hash]) {
+          assert(member);
+          if (io.coin)
+            member.value += io.coin.value;
+          else if (io.value)
+            member.value += io.value;
+          continue;
+        }
+
+        // Create a member for this account.
+        assert(!member);
+        member = MapMember.fromPath(path);
+
+        // Set the _initial_ value.
+        if (io.coin)
+          member.value = io.coin.value;
+        else if (io.value)
+          member.value = io.value;
+
+        // Add the address to the path object
+        // and push onto the member's paths.
+        // We only do this during instantiation,
+        // since paths are just as unique as
+        // addresses.
+        path.address = address;
+        member.paths.push(path);
+
+        // Remember it by wallet id / account
+        // name so we can update the value later.
+        members[key] = member;
+
+        // Push onto _our_ input/output array.
+        target.push(member);
+      }
+
+      // Update this guy last so the above if
+      // clause does not return true while
+      // we're still iterating over paths.
+      hashes[hash] = true;
+    }
+  }
+
+  // Finally, we convert both inputs
+  // and outputs to map members.
+  insert(tx.inputs, this.inputs);
+  insert(tx.outputs, this.outputs);
+
+  // Combine both input and output map
+  // members and uniqify them by account.
+  members = {};
+
+  for (i = 0; i < this.inputs.length; i++) {
+    input = this.inputs[i];
+    key = input.toKey();
+    if (!members[key]) {
+      members[key] = true;
+      this.accounts.push(input);
+    }
+  }
+
+  for (i = 0; i < this.outputs.length; i++) {
+    output = this.outputs[i];
+    key = output.toKey();
+    if (!members[key]) {
+      members[key] = true;
+      this.accounts.push(output);
     }
   }
 
-  this.wallets = utils.uniq(this.wallets);
-  this.accounts = uniq(this.paths);
   this.table = table;
 
-  members = {};
-
-  for (i = 0; i < tx.inputs.length; i++) {
-    input = tx.inputs[i];
-    hash = input.getHash('hex');
-    if (!hash)
-      continue;
-    member = members[hash];
-    if (!member) {
-      member = MapMember.fromMember(table, input);
-      members[hash] = member;
-      this.inputs.push(member);
-      continue;
-    }
-    if (input.coin)
-      member.value += input.coin.value;
-  }
-
-  members = {};
-
-  for (i = 0; i < tx.outputs.length; i++) {
-    output = tx.outputs[i];
-    hash = output.getHash('hex');
-    member = members[hash];
-    if (!hash)
-      continue;
-    if (!member) {
-      member = MapMember.fromMember(table, output);
-      members[hash] = member;
-      this.outputs.push(member);
-      continue;
-    }
-    member.value += output.value;
-  }
-
   return this;
 };
 
@@ -1779,58 +1829,82 @@ WalletMap.prototype.toJSON = function toJSON() {
     outputs: this.outputs.map(function(output) {
       return output.toJSON();
     }),
-    paths: this.paths.map(function(path) {
-      return path.toJSON();
-    }),
     accounts: this.accounts.map(function(path) {
-      return path.toAccount();
-    }),
-    wallets: this.wallets
+      return path.toKey();
+    })
   };
 };
 
 WalletMap.prototype.fromJSON = function fromJSON(json) {
   var table = {};
-  var i, account, path, input, output, hash;
+  var i, j, account, input, output, path;
+  var hash, paths, hashes, accounts, values, key;
 
   for (i = 0; i < json.inputs.length; i++) {
     input = json.inputs[i];
     input = MapMember.fromJSON(input);
-    hash = input.getHash('hex');
-    table[hash] = input.paths;
     this.inputs.push(input);
+    for (j = 0; j < input.paths.length; j++) {
+      path = input.paths[j];
+      path.id = input.id;
+      path.name = input.name;
+      path.account = input.account;
+      hash = path.address.getHash('hex');
+      if (!table[hash])
+        table[hash] = [];
+      table[hash].push(path);
+    }
   }
 
   for (i = 0; i < json.outputs.length; i++) {
     output = json.outputs[i];
     output = MapMember.fromJSON(output);
-    hash = output.getHash('hex');
-    if (!table[hash])
-      table[hash] = output.paths;
     this.outputs.push(output);
-  }
-
-  for (i = 0; i < json.paths.length; i++) {
-    path = json.paths[i];
-    this.paths.push(bcoin.path.fromJSON(path));
+    for (j = 0; j < output.paths.length; j++) {
+      path = output.paths[j];
+      path.id = output.id;
+      path.name = output.name;
+      path.account = output.account;
+      hash = path.address.getHash('hex');
+      if (!table[hash])
+        table[hash] = [];
+      table[hash].push(path);
+    }
   }
 
   for (i = 0; i < json.accounts.length; i++) {
     account = json.accounts[i];
-    this.accounts.push(bcoin.path.fromAccount(account));
+    this.accounts.push(bcoin.path.fromKey(account));
+  }
+
+  // We need to rebuild to address->paths table.
+  hashes = Object.keys(table);
+
+  for (i = 0; i < hashes.length; i++) {
+    hash = hashes[i];
+    paths = table[hash];
+    values = [];
+    accounts = {};
+    for (j = 0; j < paths.length; j++) {
+      path = paths[j];
+      key = path.toKey();
+      if (!accounts[key]) {
+        accounts[key] = true;
+        values.push(path);
+      }
+    }
+    table[hash] = values;
   }
 
-  this.wallets = json.wallets;
   this.table = table;
 
   return this;
 };
 
 WalletMap.fromJSON = function fromJSON(json) {
-  return new MapMember({}).fromJSON(json);
+  return new WalletMap().fromJSON(json);
 };
 
-
 /**
  * MapMember
  * @constructor
@@ -1838,49 +1912,45 @@ WalletMap.fromJSON = function fromJSON(json) {
  */
 
 function MapMember() {
-  this.value = 0;
-  this.address = null;
+  if (!(this instanceof MapMember))
+    return new MapMember();
+
+  this.id = null;
+  this.name = null;
+  this.account = 0;
   this.paths = [];
-  this.accounts = [];
-  this.wallets = [];
+  this.value = 0;
 }
 
+MapMember.prototype.toKey = function toKey() {
+  return this.id + '/' + this.name + ':' + this.account;
+};
+
 MapMember.prototype.toJSON = function toJSON() {
   return {
-    value: utils.btc(this.value),
-    address: this.address
-      ? this.address.toBase58()
-      : null,
-    hash: this.address
-      ? this.address.getHash('hex')
-      : null,
+    id: this.id,
+    name: this.name,
+    account: this.account,
     paths: this.paths.map(function(path) {
-      return path.toJSON();
+      return path.toCompact();
     }),
-    accounts: this.accounts.map(function(path) {
-      return path.toAccount();
-    }),
-    wallets: this.wallets
+    value: utils.btc(this.value)
   };
 };
 
 MapMember.prototype.fromJSON = function fromJSON(json) {
   var i, account, path;
 
-  this.value = utils.satoshi(json.value);
-  this.address = bcoin.address.fromBase58(json.address);
+  this.id = json.id;
+  this.name = json.name;
+  this.account = json.account;
 
   for (i = 0; i < json.paths.length; i++) {
     path = json.paths[i];
-    this.paths.push(bcoin.path.fromJSON(path));
+    this.paths.push(bcoin.path.fromCompact(path));
   }
 
-  for (i = 0; i < json.accounts.length; i++) {
-    account = json.accounts[i];
-    this.accounts.push(bcoin.path.fromAccount(account));
-  }
-
-  this.wallets = json.wallets;
+  this.value = utils.satoshi(json.value);
 
   return this;
 };
@@ -1889,57 +1959,16 @@ MapMember.fromJSON = function fromJSON(json) {
   return new MapMember().fromJSON(json);
 };
 
-MapMember.fromMember = function fromMember(table, io) {
-  var address = io.getAddress();
-  var member = new MapMember();
-  var i, paths;
-
-  if (io instanceof bcoin.input)
-    member.value = io.coin ? io.coin.value : 0;
-  else
-    member.value = io.value;
-
-  if (!address)
-    return member;
-
-  paths = table[address.getHash('hex')];
-
-  assert(paths);
-
-  member.address = address;
-  member.paths = paths;
-
-  for (i = 0; i < paths.length; i++)
-    member.wallets.push(paths[i].id);
-
-  member.accounts = uniq(member.paths);
-  member.wallets = utils.uniq(member.wallets);
-
-  return member;
+MapMember.prototype.fromPath = function fromPath(path) {
+  this.id = path.id;
+  this.name = path.name;
+  this.account = path.account;
+  return this;
 };
 
-/*
- * Helpers
- */
-
-function uniq(obj) {
-  var uniq = {};
-  var out = [];
-  var i, key, value;
-
-  for (i = 0; i < obj.length; i++) {
-    value = obj[i];
-    key = value.id + '/' + value.account;
-
-    if (uniq[key])
-      continue;
-
-    uniq[key] = true;
-    out.push(value);
-  }
-
-  return out;
-}
+MapMember.fromPath = function fromPath(path) {
+  return new MapMember().fromPath(path);
+};
 
 /*
  * Expose
diff --git a/lib/bcoin/walletdb.js b/lib/bcoin/walletdb.js
index 400948b0..1c5b9fa4 100644
--- a/lib/bcoin/walletdb.js
+++ b/lib/bcoin/walletdb.js
@@ -187,27 +187,22 @@ WalletDB.prototype.updateBalances = function updateBalances(tx, map, callback) {
   var balances = {};
 
   utils.forEachSerial(map.outputs, function(output, next) {
-    utils.forEachSerial(output.wallets, function(id, next) {
-      if (self.listeners('balance').length === 0
-          && !self.hasListener(id, 'balance')) {
-        return next();
-      }
+    var id = output.id;
 
-      if (balances[id] != null)
-        return next();
+    if (self.listeners('balance').length === 0
+        && !self.hasListener(id, 'balance')) {
+      return next();
+    }
 
-      self.getBalance(id, function(err, balance) {
-        if (err)
-          return next(err);
+    if (balances[id] != null)
+      return next();
 
-        balances[id] = balance;
-
-        next();
-      });
-    }, function(err) {
+    self.getBalance(id, function(err, balance) {
       if (err)
         return next(err);
 
+      balances[id] = balance;
+
       next();
     });
   }, function(err) {
@@ -221,18 +216,12 @@ WalletDB.prototype.updateBalances = function updateBalances(tx, map, callback) {
 WalletDB.prototype.syncOutputs = function syncOutputs(tx, map, callback) {
   var self = this;
   utils.forEachSerial(map.outputs, function(output, next) {
-    utils.forEachSerial(output.wallets, function(id, next) {
-      self.syncOutputDepth(id, tx, function(err, receive, change) {
-        if (err)
-          return next(err);
-        self.fire(id, 'address', receive, change);
-        self.emit('address', receive, change, map);
-        next();
-      });
-    }, function(err) {
+    var id = output.id;
+    self.syncOutputDepth(id, tx, function(err, receive, change) {
       if (err)
         return next(err);
-
+      self.fire(id, 'address', receive, change);
+      self.emit('address', receive, change, map);
       next();
     });
   }, callback);
@@ -1164,12 +1153,15 @@ WalletDB.prototype.getRedeem = function getRedeem(id, hash, callback) {
  */
 
 function Path() {
+  if (!(this instanceof Path))
+    return new Path();
+
   this.id = null;
   this.name = null;
   this.account = 0;
   this.change = 0;
   this.index = 0;
-  this.hash = null;
+  this.address = null;
 }
 
 Path.prototype.fromRaw = function fromRaw(data) {
@@ -1186,6 +1178,21 @@ Path.fromRaw = function fromRaw(data) {
   return new Path().fromRaw(data);
 };
 
+Path.prototype.toRaw = function toRaw(writer) {
+  var p = new BufferWriter(writer);
+
+  p.writeVarString(this.id, 'utf8');
+  p.writeVarString(this.name, 'utf8');
+  p.writeU32(this.account);
+  p.writeU32(this.change);
+  p.writeU32(this.index);
+
+  if (!writer)
+    p = p.render();
+
+  return p;
+};
+
 Path.prototype.fromKeyRing = function fromKeyRing(id, address) {
   this.id = id;
   this.name = address.name;
@@ -1212,14 +1219,6 @@ Path.prototype.inspect = function() {
     + '>';
 };
 
-Path.prototype.toAccount = function toAccount() {
-  return {
-    id: this.id,
-    name: this.name,
-    account: this.account
-  };
-};
-
 Path.prototype.toJSON = function toJSON() {
   return {
     id: this.id,
@@ -1228,19 +1227,6 @@ Path.prototype.toJSON = function toJSON() {
   };
 };
 
-Path.prototype.fromAccount = function fromAccount(json) {
-  this.id = json.id;
-  this.name = json.name;
-  this.account = json.account;
-  this.change = 0;
-  this.index = 0;
-  return this;
-};
-
-Path.fromAccount = function fromAccount(json) {
-  return new Path().fromAccount(json);
-};
-
 Path.prototype.fromJSON = function fromJSON(json) {
   var indexes = bcoin.hd.parsePath(json.path, constants.hd.MAX_INDEX);
 
@@ -1261,19 +1247,46 @@ Path.fromJSON = function fromJSON(json) {
   return new Path().fromJSON(json);
 };
 
-Path.prototype.toRaw = function toRaw(writer) {
-  var p = new BufferWriter(writer);
+Path.prototype.toKey = function toKey() {
+  return this.id + '/' + this.name + ':' + this.account;
+};
 
-  p.writeVarString(this.id, 'utf8');
-  p.writeVarString(this.name, 'utf8');
-  p.writeU32(this.account);
-  p.writeU32(this.change);
-  p.writeU32(this.index);
+Path.prototype.fromKey = function fromKey(key) {
+  var parts = key.split('/');
+  this.id = parts[0];
+  parts = parts[1].split(':');
+  this.name = parts[0];
+  this.account = +parts[1];
+  return this;
+};
 
-  if (!writer)
-    p = p.render();
+Path.fromKey = function fromKey(json) {
+  return new Path().fromKey(key);
+};
 
-  return p;
+Path.prototype.toCompact = function toCompact() {
+  return {
+    path: 'm/' + this.change + '/' + this.index,
+    address: this.address ? this.address.toBase58() : null
+  };
+};
+
+Path.prototype.fromCompact = function fromCompact(json) {
+  var indexes = bcoin.hd.parsePath(json.path, constants.hd.MAX_INDEX);
+
+  assert(indexes.length === 2);
+
+  this.change = indexes[0];
+  this.index = indexes[1];
+  this.address = json.address
+    ? bcoin.address.fromBase58(json.address)
+    : null;
+
+  return this;
+};
+
+Path.fromCompact = function fromCompact(json) {
+  return new Path().fromCompact(json);
 };
 
 /*