diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 947c9b99c5..cf8fc0b533 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -950,8 +950,10 @@ phutil_register_library_map(array(
     'LegalpadDocumentSignatureVerificationController' => 'applications/legalpad/controller/LegalpadDocumentSignatureVerificationController.php',
     'LegalpadDocumentSignatureViewController' => 'applications/legalpad/controller/LegalpadDocumentSignatureViewController.php',
     'LegalpadMockMailReceiver' => 'applications/legalpad/mail/LegalpadMockMailReceiver.php',
+    'LegalpadObjectNeedsSignatureEdgeType' => 'applications/legalpad/edge/LegalpadObjectNeedsSignatureEdgeType.php',
     'LegalpadReplyHandler' => 'applications/legalpad/mail/LegalpadReplyHandler.php',
     'LegalpadSchemaSpec' => 'applications/legalpad/storage/LegalpadSchemaSpec.php',
+    'LegalpadSignatureNeededByObjectEdgeType' => 'applications/legalpad/edge/LegalpadSignatureNeededByObjectEdgeType.php',
     'LegalpadTransaction' => 'applications/legalpad/storage/LegalpadTransaction.php',
     'LegalpadTransactionComment' => 'applications/legalpad/storage/LegalpadTransactionComment.php',
     'LegalpadTransactionQuery' => 'applications/legalpad/query/LegalpadTransactionQuery.php',
@@ -4050,8 +4052,10 @@ phutil_register_library_map(array(
     'LegalpadDocumentSignatureVerificationController' => 'LegalpadController',
     'LegalpadDocumentSignatureViewController' => 'LegalpadController',
     'LegalpadMockMailReceiver' => 'PhabricatorObjectMailReceiver',
+    'LegalpadObjectNeedsSignatureEdgeType' => 'PhabricatorEdgeType',
     'LegalpadReplyHandler' => 'PhabricatorMailReplyHandler',
     'LegalpadSchemaSpec' => 'PhabricatorConfigSchemaSpec',
+    'LegalpadSignatureNeededByObjectEdgeType' => 'PhabricatorEdgeType',
     'LegalpadTransaction' => 'PhabricatorApplicationTransaction',
     'LegalpadTransactionComment' => 'PhabricatorApplicationTransactionComment',
     'LegalpadTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
diff --git a/src/applications/differential/customfield/DifferentialRequiredSignaturesField.php b/src/applications/differential/customfield/DifferentialRequiredSignaturesField.php
index 85dcc32d5a..2408daa27c 100644
--- a/src/applications/differential/customfield/DifferentialRequiredSignaturesField.php
+++ b/src/applications/differential/customfield/DifferentialRequiredSignaturesField.php
@@ -39,7 +39,7 @@ final class DifferentialRequiredSignaturesField
 
     $phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
       $revision->getPHID(),
-      PhabricatorEdgeConfig::TYPE_OBJECT_NEEDS_SIGNATURE);
+      LegalpadObjectNeedsSignatureEdgeType::EDGECONST);
 
     if ($phids) {
 
diff --git a/src/applications/differential/editor/DifferentialTransactionEditor.php b/src/applications/differential/editor/DifferentialTransactionEditor.php
index a0981544b9..c8d9ce86ef 100644
--- a/src/applications/differential/editor/DifferentialTransactionEditor.php
+++ b/src/applications/differential/editor/DifferentialTransactionEditor.php
@@ -1633,7 +1633,7 @@ final class DifferentialTransactionEditor
 
       // If we still have something to trigger, add the edges.
       if ($legal_phids) {
-        $edge_legal = PhabricatorEdgeConfig::TYPE_OBJECT_NEEDS_SIGNATURE;
+        $edge_legal = LegalpadObjectNeedsSignatureEdgeType::EDGECONST;
         $xactions[] = id(new DifferentialTransaction())
           ->setTransactionType(PhabricatorTransactions::TYPE_EDGE)
           ->setMetadataValue('edge:type', $edge_legal)
diff --git a/src/applications/legalpad/edge/LegalpadObjectNeedsSignatureEdgeType.php b/src/applications/legalpad/edge/LegalpadObjectNeedsSignatureEdgeType.php
new file mode 100644
index 0000000000..dfc5843fd2
--- /dev/null
+++ b/src/applications/legalpad/edge/LegalpadObjectNeedsSignatureEdgeType.php
@@ -0,0 +1,102 @@
+<?php
+
+final class LegalpadObjectNeedsSignatureEdgeType extends PhabricatorEdgeType {
+
+  const EDGECONST = 49;
+
+  public function getInverseEdgeConstant() {
+    return LegalpadSignatureNeededByObjectEdgeType::EDGECONST;
+  }
+
+  public function getTransactionAddString(
+    $actor,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s required legal document(s): %s.',
+      $actor,
+      $add_count,
+      $add_edges);
+  }
+
+  public function getTransactionRemoveString(
+    $actor,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s required legal document(s): %s.',
+      $actor,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getTransactionEditString(
+    $actor,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited %s required legal document(s), added %s: %s; removed %s: %s.',
+      $actor,
+      $total_count,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getFeedAddString(
+    $actor,
+    $object,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s required legal document(s) to %s: %s.',
+      $actor,
+      $add_count,
+      $object,
+      $add_edges);
+  }
+
+  public function getFeedRemoveString(
+    $actor,
+    $object,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s required legal document(s) from %s: %s.',
+      $actor,
+      $rem_count,
+      $object,
+      $rem_edges);
+  }
+
+  public function getFeedEditString(
+    $actor,
+    $object,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited %s required legal document(s) for %s, '.
+      'added %s: %s; removed %s: %s.',
+      $actor,
+      $total_count,
+      $object,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+
+}
diff --git a/src/applications/legalpad/edge/LegalpadSignatureNeededByObjectEdgeType.php b/src/applications/legalpad/edge/LegalpadSignatureNeededByObjectEdgeType.php
new file mode 100644
index 0000000000..fd4db78177
--- /dev/null
+++ b/src/applications/legalpad/edge/LegalpadSignatureNeededByObjectEdgeType.php
@@ -0,0 +1,12 @@
+<?php
+
+final class LegalpadSignatureNeededByObjectEdgeType
+  extends PhabricatorEdgeType {
+
+  const EDGECONST = 50;
+
+  public function getInverseEdgeConstant() {
+    return LegalpadObjectNeedsSignatureEdgeType::EDGECONST;
+  }
+
+}
diff --git a/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php b/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
index f476d16967..46287a5dd5 100644
--- a/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
+++ b/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
@@ -46,9 +46,6 @@ final class PhabricatorEdgeConfig extends PhabricatorEdgeConstants {
   const TYPE_OBJECT_HAS_WATCHER         = 47;
   const TYPE_WATCHER_HAS_OBJECT         = 48;
 
-  const TYPE_OBJECT_NEEDS_SIGNATURE     = 49;
-  const TYPE_SIGNATURE_NEEDED_BY_OBJECT = 50;
-
 /* !!!! STOP !!!! STOP !!!! STOP !!!! STOP !!!! STOP !!!! STOP !!!! STOP !!!! */
 
   // HEY! DO NOT ADD NEW CONSTANTS HERE!
@@ -171,11 +168,6 @@ final class PhabricatorEdgeConfig extends PhabricatorEdgeConstants {
 
       self::TYPE_OBJECT_HAS_WATCHER => self::TYPE_WATCHER_HAS_OBJECT,
       self::TYPE_WATCHER_HAS_OBJECT => self::TYPE_OBJECT_HAS_WATCHER,
-
-      self::TYPE_OBJECT_NEEDS_SIGNATURE =>
-        self::TYPE_SIGNATURE_NEEDED_BY_OBJECT,
-      self::TYPE_SIGNATURE_NEEDED_BY_OBJECT =>
-        self::TYPE_OBJECT_NEEDS_SIGNATURE,
     );
 
     return idx($map, $edge_type);
@@ -308,8 +300,6 @@ final class PhabricatorEdgeConfig extends PhabricatorEdgeConstants {
         return '%s added %d dashboard(s): %s.';
       case self::TYPE_OBJECT_HAS_WATCHER:
         return '%s added %d watcher(s): %s.';
-      case self::TYPE_OBJECT_NEEDS_SIGNATURE:
-        return '%s added %d required legal document(s): %s.';
       case self::TYPE_SUBSCRIBED_TO_OBJECT:
       case self::TYPE_UNSUBSCRIBED_FROM_OBJECT:
       case self::TYPE_FILE_HAS_OBJECT:
diff --git a/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php b/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
index 85b718ec6b..c80d58fba5 100644
--- a/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
+++ b/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
@@ -914,7 +914,7 @@ abstract class PhabricatorBaseEnglishTranslation
         ),
       ),
 
-      '%s added %d required legal document(s): %s.' => array(
+      '%s added %s required legal document(s): %s.' => array(
         array(
           '%s added a required legal document: %3$s.',
           '%s added required legal documents: %3$s.',