lib: adapt to [email protected]

lib/elliptic/curve/short.js

@@ -151,11 +151,11 @@ ShortCurve.prototype._getEndoBasis = function _getEndoBasis(lambda) {
   }
 
   // Normalize signs
-  if (a1.sign) {
+  if (a1.negative) {
     a1 = a1.neg();
     b1 = b1.neg();
   }
-  if (a2.sign) {
+  if (a2.negative) {
     a2 = a2.neg();
     b2 = b2.neg();
   }
@@ -223,12 +223,12 @@ ShortCurve.prototype._endoWnafMulAdd =
     var p = points[i];
     var beta = p._getBeta();
 
-    if (split.k1.sign) {
-      split.k1.sign = !split.k1.sign;
+    if (split.k1.negative) {
+      split.k1.ineg();
       p = p.neg(true);
     }
-    if (split.k2.sign) {
-      split.k2.sign = !split.k2.sign;
+    if (split.k2.negative) {
+      split.k2.ineg();
       beta = beta.neg(true);
     }
 

package.json

@@ -33,7 +33,7 @@
     "uglify-js": "^2.4.13"
   },
   "dependencies": {
-    "bn.js": "^3.1.1",
+    "bn.js": "^4.0.0",
     "brorand": "^1.0.1",
     "hash.js": "^1.0.0",
     "inherits": "^2.0.1"