diff --git a/.eslintrc.js b/.eslintrc.js
index 2f45ad9..ce75c5c 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,7 +1,4 @@
 module.exports = {
-    "plugins": [
-        "mocha"
-    ],
     "env": {
         "es6": true,
         "node": true,
@@ -27,7 +24,6 @@ module.exports = {
         "semi": [
             "error",
             "always"
-        ],
-        "mocha/no-exclusive-tests": "error"
+        ]
     }
 };
diff --git a/package-lock.json b/package-lock.json
index 44007c5..f2b62af 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,53 +5,120 @@
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@@ -59,76 +126,39 @@
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           "bundled": true,
           "dev": true
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+          "bundled": true,
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-            "strip-ansi": "^4.0.0",
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-          "dev": true
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+          "bundled": true,
+          "dev": true,
+          "requires": {
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+          }
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+        "color-name": {
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+          "bundled": true,
+          "dev": true
+        },
+        "create-hash": {
+          "version": "1.2.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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+            "inherits": "^2.0.1",
+            "md5.js": "^1.3.4",
+            "ripemd160": "^2.0.1",
+            "sha.js": "^2.4.0"
+          }
+        },
+        "create-hmac": {
+          "version": "1.1.7",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "cipher-base": "^1.0.3",
+            "create-hash": "^1.1.0",
+            "inherits": "^2.0.1",
+            "ripemd160": "^2.0.0",
+            "safe-buffer": "^5.0.1",
+            "sha.js": "^2.4.8"
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+        "cross-spawn": {
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+          "bundled": true,
+          "dev": true,
+          "requires": {
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+            "path-key": "^2.0.1",
+            "semver": "^5.5.0",
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           }
@@ -2241,13 +2044,82 @@
           "bundled": true,
           "dev": true
         },
-        "execa": {
-          "version": "0.7.0",
+        "drbg.js": {
+          "version": "1.0.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "cross-spawn": "^5.0.1",
-            "get-stream": "^3.0.0",
+            "browserify-aes": "^1.0.6",
+            "create-hash": "^1.1.2",
+            "create-hmac": "^1.1.4"
+          }
+        },
+        "elliptic": {
+          "version": "6.5.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.4.0",
+            "brorand": "^1.0.1",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.0",
+            "inherits": "^2.0.1",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.0"
+          }
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+        "emoji-regex": {
+          "version": "7.0.3",
+          "bundled": true,
+          "dev": true
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+          "bundled": true,
+          "dev": true,
+          "requires": {
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+          }
+        },
+        "ethereumjs-util": {
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+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.0",
+            "create-hash": "^1.1.2",
+            "ethjs-util": "0.1.6",
+            "keccak": "^1.0.2",
+            "rlp": "^2.0.0",
+            "safe-buffer": "^5.1.1",
+            "secp256k1": "^3.0.1"
+          }
+        },
+        "ethjs-util": {
+          "version": "0.1.6",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "is-hex-prefixed": "1.0.0",
+            "strip-hex-prefix": "1.0.0"
+          }
+        },
+        "evp_bytestokey": {
+          "version": "1.0.3",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "md5.js": "^1.3.4",
+            "safe-buffer": "^5.1.1"
+          }
+        },
+        "execa": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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+            "get-stream": "^4.0.0",
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             "p-finally": "^1.0.0",
@@ -2255,26 +2127,67 @@
             "strip-eof": "^1.0.0"
           }
         },
+        "file-uri-to-path": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
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+          "version": "3.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "locate-path": "^2.0.0"
+            "locate-path": "^3.0.0"
           }
         },
         "get-caller-file": {
-          "version": "1.0.3",
+          "version": "2.0.5",
           "bundled": true,
           "dev": true
         },
         "get-stream": {
-          "version": "3.0.0",
+          "version": "4.1.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "pump": "^3.0.0"
+          }
+        },
+        "hash-base": {
+          "version": "3.0.4",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.1",
+            "safe-buffer": "^5.0.1"
+          }
+        },
+        "hash.js": {
+          "version": "1.1.7",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "minimalistic-assert": "^1.0.1"
+          }
+        },
+        "hmac-drbg": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "hash.js": "^1.0.3",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.1"
+          }
+        },
+        "inherits": {
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           "dev": true
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-          "version": "1.0.0",
+          "version": "2.0.0",
           "bundled": true,
           "dev": true
         },
@@ -2283,6 +2196,11 @@
           "bundled": true,
           "dev": true
         },
+        "is-hex-prefixed": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
+        },
         "is-stream": {
           "version": "1.1.0",
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@@ -2293,42 +2211,84 @@
           "bundled": true,
           "dev": true
         },
-        "lcid": {
-          "version": "1.0.0",
+        "keccak": {
+          "version": "1.4.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "invert-kv": "^1.0.0"
+            "bindings": "^1.2.1",
+            "inherits": "^2.0.3",
+            "nan": "^2.2.1",
+            "safe-buffer": "^5.1.0"
           }
         },
-        "locate-path": {
+        "lcid": {
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           "bundled": true,
           "dev": true,
           "requires": {
-            "p-locate": "^2.0.0",
+            "invert-kv": "^2.0.0"
+          }
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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             "path-exists": "^3.0.0"
           }
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-        "lru-cache": {
-          "version": "4.1.4",
+        "map-age-cleaner": {
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           "bundled": true,
           "dev": true,
           "requires": {
-            "pseudomap": "^1.0.2",
-            "yallist": "^3.0.2"
+            "p-defer": "^1.0.0"
+          }
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+        "md5.js": {
+          "version": "1.3.5",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "hash-base": "^3.0.0",
+            "inherits": "^2.0.1",
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-          "version": "1.1.0",
+          "version": "4.3.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "mimic-fn": "^1.0.0"
+            "map-age-cleaner": "^0.1.1",
+            "mimic-fn": "^2.0.0",
+            "p-is-promise": "^2.0.0"
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-          "version": "1.2.0",
+          "version": "2.1.0",
+          "bundled": true,
+          "dev": true
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+        "minimalistic-assert": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true
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+        "minimalistic-crypto-utils": {
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+          "bundled": true,
+          "dev": true
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+        "nan": {
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+          "bundled": true,
+          "dev": true
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+        "nice-try": {
+          "version": "1.0.5",
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@@ -2340,44 +2300,57 @@
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-          "version": "1.0.1",
-          "bundled": true,
-          "dev": true
-        },
-        "os-locale": {
-          "version": "2.1.0",
+        "once": {
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           "bundled": true,
           "dev": true,
           "requires": {
-            "execa": "^0.7.0",
-            "lcid": "^1.0.0",
-            "mem": "^1.1.0"
+            "wrappy": "1"
           }
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+        "os-locale": {
+          "version": "3.1.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "execa": "^1.0.0",
+            "lcid": "^2.0.0",
+            "mem": "^4.0.0"
+          }
+        },
+        "p-defer": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
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           "version": "1.0.0",
           "bundled": true,
           "dev": true
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+        "p-is-promise": {
+          "version": "2.1.0",
+          "bundled": true,
+          "dev": true
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-          "version": "1.3.0",
+          "version": "2.2.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "p-try": "^1.0.0"
+            "p-try": "^2.0.0"
           }
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-          "version": "2.0.0",
+          "version": "3.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "p-limit": "^1.1.0"
+            "p-limit": "^2.0.0"
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-          "version": "1.0.0",
+          "version": "2.2.0",
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@@ -2391,10 +2364,14 @@
           "bundled": true,
           "dev": true
         },
-        "pseudomap": {
-          "version": "1.0.2",
+        "pump": {
+          "version": "3.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "end-of-stream": "^1.1.0",
+            "once": "^1.3.1"
+          }
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@@ -2402,7 +2379,50 @@
           "dev": true
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         "require-main-filename": {
-          "version": "1.0.1",
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "ripemd160": {
+          "version": "2.0.2",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "hash-base": "^3.0.0",
+            "inherits": "^2.0.1"
+          }
+        },
+        "rlp": {
+          "version": "2.2.3",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.1",
+            "safe-buffer": "^5.1.1"
+          }
+        },
+        "safe-buffer": {
+          "version": "5.2.0",
+          "bundled": true,
+          "dev": true
+        },
+        "secp256k1": {
+          "version": "3.7.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bindings": "^1.5.0",
+            "bip66": "^1.1.5",
+            "bn.js": "^4.11.8",
+            "create-hash": "^1.2.0",
+            "drbg.js": "^1.0.1",
+            "elliptic": "^6.4.1",
+            "nan": "^2.14.0",
+            "safe-buffer": "^5.1.2"
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+        "semver": {
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           "bundled": true,
           "dev": true
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@@ -2411,6 +2431,15 @@
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+        "sha.js": {
+          "version": "2.4.11",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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@@ -2435,7 +2464,7 @@
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-          "version": "0.5.9",
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@@ -2444,20 +2473,21 @@
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-          "version": "2.1.1",
+          "version": "3.1.0",
           "bundled": true,
           "dev": true,
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-          "version": "4.0.0",
+          "version": "5.2.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "ansi-regex": "^3.0.0"
+            "ansi-regex": "^4.1.0"
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@@ -2465,6 +2495,14 @@
           "bundled": true,
           "dev": true
         },
+        "strip-hex-prefix": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true,
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@@ -2479,90 +2517,58 @@
           "dev": true
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-          "version": "2.1.0",
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-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "ansi-regex": "^2.0.0"
-              }
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+            "ansi-styles": "^3.2.0",
+            "string-width": "^3.0.0",
+            "strip-ansi": "^5.0.0"
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-        "y18n": {
-          "version": "3.2.1",
+        "wrappy": {
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           "dev": true
         },
-        "yallist": {
-          "version": "3.0.2",
+        "y18n": {
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           "bundled": true,
           "dev": true
         },
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-          "version": "11.1.0",
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-            "find-up": "^2.1.0",
-            "get-caller-file": "^1.0.1",
-            "os-locale": "^2.0.0",
+            "cliui": "^5.0.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
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-            "y18n": "^3.2.1",
-            "yargs-parser": "^9.0.2"
+            "y18n": "^4.0.0",
+            "yargs-parser": "^13.1.0"
           }
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-          "version": "9.0.2",
+          "version": "13.1.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "camelcase": "^4.1.0"
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
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-      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.3.tgz",
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+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg=="
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@@ -2577,15 +2583,18 @@
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-      "integrity": "sha1-3BXKHGcjh8p2vTesCjlbogQqLCg="
+    "getpass": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
+      "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
+      "requires": {
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-      "version": "7.1.4",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
-      "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+      "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
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@@ -2596,52 +2605,12 @@
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+      "requires": {
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+        "underscore": "1.9.1",
+        "web3-core-helpers": "1.2.6"
+      }
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+      "resolved": "https://registry.npmjs.org/web3-shh/-/web3-shh-1.2.6.tgz",
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+      "requires": {
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+        "web3-core-method": "1.2.6",
+        "web3-core-subscriptions": "1.2.6",
+        "web3-net": "1.2.6"
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     "web3-utils": {
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-      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.0.0-beta.55.tgz",
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+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.2.6.tgz",
+      "integrity": "sha512-8/HnqG/l7dGmKMgEL9JeKPTtjScxOePTzopv5aaKFExPfaBrYRkgoMqhoowCiAl/s16QaTn4DoIF1QC4YsT7Mg==",
       "requires": {
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-        "@types/node": "^10.12.18",
         "bn.js": "4.11.8",
-        "eth-lib": "0.2.8",
-        "ethjs-unit": "^0.1.6",
-        "lodash": "^4.17.11",
+        "eth-lib": "0.2.7",
+        "ethereum-bloom-filters": "^1.0.6",
+        "ethjs-unit": "0.1.6",
         "number-to-bn": "1.7.0",
         "randombytes": "^2.1.0",
-        "utf8": "2.1.1"
-      }
-    },
-    "websocket": {
-      "version": "1.0.29",
-      "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.29.tgz",
-      "integrity": "sha512-WhU8jKXC8sTh6ocLSqpZRlOKMNYGwUvjA5+XcIgIk/G3JCaDfkZUr0zA19sVSxJ0TEvm0i5IBzr54RZC4vzW7g==",
-      "requires": {
-        "debug": "^2.2.0",
-        "gulp": "^4.0.2",
-        "nan": "^2.11.0",
-        "typedarray-to-buffer": "^3.1.5",
-        "yaeti": "^0.0.6"
+        "underscore": "1.9.1",
+        "utf8": "3.0.0"
       },
       "dependencies": {
-        "debug": {
-          "version": "2.6.9",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+        "eth-lib": {
+          "version": "0.2.7",
+          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.7.tgz",
+          "integrity": "sha1-L5Pxex4jrsN1nNSj/iDBKGo/wco=",
           "requires": {
-            "ms": "2.0.0"
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "xhr-request-promise": "^0.1.2"
           }
-        },
-        "ms": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
         }
       }
     },
@@ -5606,51 +5095,19 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
-    "wordwrap": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
-      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus="
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
     },
     "wrap-ansi": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
-      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
+      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
       "requires": {
-        "string-width": "^1.0.1",
-        "strip-ansi": "^3.0.1"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
-        },
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
-          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
-          "requires": {
-            "number-is-nan": "^1.0.0"
-          }
-        },
-        "string-width": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-          "requires": {
-            "code-point-at": "^1.0.0",
-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "3.0.1",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "requires": {
-            "ansi-regex": "^2.0.0"
-          }
-        }
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
       }
     },
     "wrappy": {
@@ -5666,6 +5123,23 @@
         "mkdirp": "^0.5.1"
       }
     },
+    "ws": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
+      "requires": {
+        "async-limiter": "~1.0.0",
+        "safe-buffer": "~5.1.0",
+        "ultron": "~1.1.0"
+      },
+      "dependencies": {
+        "safe-buffer": {
+          "version": "5.1.2",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+        }
+      }
+    },
     "xhr": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
@@ -5727,33 +5201,46 @@
       "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
       "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc="
     },
+    "yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
+    },
     "yargs": {
-      "version": "12.0.5",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
-      "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.3.1.tgz",
+      "integrity": "sha512-92O1HWEjw27sBfgmXiixJWT5hRBp2eobqXicLtPBIDBhYB+1HpwZlXmbW2luivBJHBzki+7VyCLRtAkScbTBQA==",
       "requires": {
-        "cliui": "^4.0.0",
+        "cliui": "^6.0.0",
         "decamelize": "^1.2.0",
-        "find-up": "^3.0.0",
-        "get-caller-file": "^1.0.1",
-        "os-locale": "^3.0.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
         "require-directory": "^2.1.1",
-        "require-main-filename": "^1.0.1",
+        "require-main-filename": "^2.0.0",
         "set-blocking": "^2.0.0",
-        "string-width": "^2.0.0",
+        "string-width": "^4.2.0",
         "which-module": "^2.0.0",
-        "y18n": "^3.2.1 || ^4.0.0",
-        "yargs-parser": "^11.1.1"
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.1"
       }
     },
     "yargs-parser": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
-      "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+      "version": "18.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.2.tgz",
+      "integrity": "sha512-hlIPNR3IzC1YuL1c2UwwDKpXlNFBqD1Fswwh1khz5+d8Cq/8yc/Mn0i+rQXduu8hcrFKvO7Eryk+09NecTQAAQ==",
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
       }
+    },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 6861042..c4a5722 100644
--- a/package.json
+++ b/package.json
@@ -26,15 +26,15 @@
   "dependencies": {
     "blake-hash": "^1.1.0",
     "blake2b": "^2.1.3",
-    "circom": "0.0.35",
-    "fflib": "0.0.1",
+    "circom": "0.5.2",
+    "ffjavascript": "0.0.3",
     "snarkjs": "^0.1.20",
     "typedarray-to-buffer": "^3.1.5",
-    "web3": "^1.0.0-beta.55"
+    "web3": "^1.2.6"
   },
   "devDependencies": {
-    "eslint-plugin-mocha": "^5.2.0",
-    "ganache-cli": "^6.4.4",
+    "eslint": "^6.8.0",
+    "ganache-cli": "^6.9.1",
     "mocha": "^5.2.0"
   }
 }
diff --git a/src/babyjub.js b/src/babyjub.js
index fe3b27d..38c60d9 100644
--- a/src/babyjub.js
+++ b/src/babyjub.js
@@ -1,5 +1,5 @@
 const bigInt = require("big-integer");
-const ZqField = require("fflib").ZqField;
+const ZqField = require("ffjavascript").ZqField;
 const utils = require("./utils.js");
 
 exports.addPoint = addPoint;
diff --git a/src/mimc7.js b/src/mimc7.js
index 5cfb421..6ae1a8f 100644
--- a/src/mimc7.js
+++ b/src/mimc7.js
@@ -1,5 +1,5 @@
 const bigInt = require("big-integer");
-const ZqField = require("fflib").ZqField;
+const ZqField = require("ffjavascript").ZqField;
 
 const Web3Utils = require("web3-utils");
 const F = new ZqField(bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
diff --git a/src/mimcsponge.js b/src/mimcsponge.js
index 2b3bf6e..6b5e4db 100644
--- a/src/mimcsponge.js
+++ b/src/mimcsponge.js
@@ -1,6 +1,6 @@
 const bigInt = require("big-integer");
 const Web3Utils = require("web3-utils");
-const ZqField = require("fflib").ZqField;
+const ZqField = require("ffjavascript").ZqField;
 const F = new ZqField(bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
 
 const SEED = "mimcsponge";
diff --git a/src/poseidon.js b/src/poseidon.js
index 479e51c..bbdcf8a 100644
--- a/src/poseidon.js
+++ b/src/poseidon.js
@@ -1,7 +1,7 @@
 const bigInt = require("big-integer");
 const blake2b = require("blake2b");
 const assert = require("assert");
-const ZqField = require("fflib").ZqField;
+const ZqField = require("ffjavascript").ZqField;
 const utils = require("./utils");
 
 const F = new ZqField(bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
diff --git a/test/aliascheck.js b/test/aliascheck.js
index aff1de0..2ec8700 100644
--- a/test/aliascheck.js
+++ b/test/aliascheck.js
@@ -1,6 +1,5 @@
 const chai = require("chai");
 const path = require("path");
-const compiler = require("circom");
 
 const assert = chai.assert;
 
@@ -37,23 +36,23 @@ describe("Aliascheck test", function () {
 
     it("Satisfy the aliastest 0", async () => {
         const inp = getBits(bigInt.zero, 254);
-        await cir.calculateWitness({in: inp});
+        await cir.calculateWitness({in: inp}, true);
     });
 
     it("Satisfy the aliastest 3", async () => {
         const inp = getBits(bigInt(3), 254);
-        await cir.calculateWitness({in: inp});
+        await cir.calculateWitness({in: inp}, true);
     });
 
     it("Satisfy the aliastest q-1", async () => {
         const inp = getBits(q.minus(bigInt.one), 254);
-        await cir.calculateWitness({in: inp});
+        await cir.calculateWitness({in: inp}, true);
     });
 
     it("Should not satisfy an input of q", async () => {
         const inp = getBits(q, 254);
         try {
-            await cir.calculateWitness({in: inp});
+            await cir.calculateWitness({in: inp}, true);
             assert(false);
         } catch(err) {
             assert(/Constraint\sdoesn't\smatch(.*)1\s!=\s0/.test(err.message) );
@@ -64,7 +63,7 @@ describe("Aliascheck test", function () {
 
         const inp = getBits(bigInt(1).shiftLeft(254).minus(bigInt.one), 254);
         try {
-            await cir.calculateWitness({in: inp});
+            await cir.calculateWitness({in: inp}, true);
             assert(false);
         } catch(err) {
             assert(/Constraint\sdoesn't\smatch(.*)1\s!=\s0/.test(err.message) );
diff --git a/test/babyjub.js b/test/babyjub.js
index e8a84a0..4a89cc8 100644
--- a/test/babyjub.js
+++ b/test/babyjub.js
@@ -34,7 +34,7 @@ describe("Baby Jub test", function () {
             y2: bigInt(1)
         };
 
-        const w = await circuitAdd.calculateWitness(input);
+        const w = await circuitAdd.calculateWitness(input, true);
 
         await circuitAdd.assertOut(w, {xout: bigInt(0), yout: bigInt(1)});
     });
@@ -48,7 +48,7 @@ describe("Baby Jub test", function () {
             y2: bigInt("2626589144620713026669568689430873010625803728049924121243784502389097019475")
         };
 
-        const w = await circuitAdd.calculateWitness(input);
+        const w = await circuitAdd.calculateWitness(input, true);
 
         await circuitAdd.assertOut(w, {
             xout: bigInt("6890855772600357754907169075114257697580319025794532037257385534741338397365"),
@@ -66,7 +66,7 @@ describe("Baby Jub test", function () {
             y2: bigInt("20819045374670962167435360035096875258406992893633759881276124905556507972311")
         };
 
-        const w = await circuitAdd.calculateWitness(input);
+        const w = await circuitAdd.calculateWitness(input, true);
 
         await circuitAdd.assertOut(w, {
             xout: bigInt("7916061937171219682591368294088513039687205273691143098332585753343424131937"),
@@ -75,15 +75,15 @@ describe("Baby Jub test", function () {
 
     });
 
-    it("Should check (0,1) is a valid poiny", async() => {
-        const w = await circuitTest.calculateWitness({x: 0, y:1});
+    it("Should check (0,1) is a valid point", async() => {
+        const w = await circuitTest.calculateWitness({x: 0, y:1}, true);
 
         await circuitTest.checkConstraints(w);
     });
 
     it("Should check (1,0) is an invalid point", async() => {
         try {
-            await circuitTest.calculateWitness({x: 1, y: 0});
+            await circuitTest.calculateWitness({x: 1, y: 0}, true);
             assert(false, "Should be a valid point");
         } catch(err) {
             assert(/Constraint\sdoesn't\smatch(.*)168700\s!=\s1/.test(err.message) );
@@ -102,7 +102,7 @@ describe("Baby Jub test", function () {
             in : S
         };
 
-        const w = await circuitPbk.calculateWitness(input);
+        const w = await circuitPbk.calculateWitness(input, true);
 
         await circuitPbk.assertOut(w, {Ax : A[0], Ay: A[1]});
 
diff --git a/test/binsub.js b/test/binsub.js
index 1e85d22..972f1db 100644
--- a/test/binsub.js
+++ b/test/binsub.js
@@ -12,7 +12,7 @@ async function checkSub(_a,_b, circuit) {
     let b=bigInt(_b);
     if (a.lesser(bigInt.zero)) a = a.add(bigInt.one.shiftLeft(16));
     if (b.lesser(bigInt.zero)) b = b.add(bigInt.one.shiftLeft(16));
-    const w = await circuit.calculateWitness({a: a, b: b});
+    const w = await circuit.calculateWitness({a: a, b: b}, true);
 
     let res = a.minus(b);
     if (res.lesser(bigInt.zero)) res = res.add(bigInt.one.shiftLeft(16));
diff --git a/test/binsum.js b/test/binsum.js
index 92f04f6..54d7500 100644
--- a/test/binsum.js
+++ b/test/binsum.js
@@ -15,9 +15,10 @@ describe("Binary sum test", function () {
         const circuit = await tester(path.join(__dirname, "circuits", "constants_test.circom"));
         await circuit.loadConstraints();
 
-        assert.equal(circuit.nWires, 2);
+        assert.equal(circuit.nVars, 2);
+        assert.equal(circuit.constraints.length, 1);
 
-        const witness = await circuit.calculateWitness({ "in": bigInt("d807aa98", 16)});
+        const witness = await circuit.calculateWitness({ "in": bigInt("d807aa98", 16)}, true);
 
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt("d807aa98", 16)));
@@ -26,9 +27,9 @@ describe("Binary sum test", function () {
         const circuit = await tester(path.join(__dirname, "circuits", "sum_test.circom"));
         await circuit.loadConstraints();
 
-        assert.equal(circuit.nWires, 97);  // 32 (in1) + 32(in2) + 32(out) + 1 (carry)
+        assert.equal(circuit.constraints.length, 97);  // 32 (in1) + 32(in2) + 32(out) + 1 (carry)
 
-        const witness = await circuit.calculateWitness({ "a": "111", "b": "222" });
+        const witness = await circuit.calculateWitness({ "a": "111", "b": "222" }, true);
 
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt("333")));
diff --git a/test/comparators.js b/test/comparators.js
index da6c8d8..ea263e0 100644
--- a/test/comparators.js
+++ b/test/comparators.js
@@ -15,11 +15,11 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "iszero.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": 111});
+        witness = await circuit.calculateWitness({ "in": 111}, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": 0 });
+        witness = await circuit.calculateWitness({ "in": 0 }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
     });
@@ -27,11 +27,11 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "isequal.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": [111,222] });
+        witness = await circuit.calculateWitness({ "in": [111,222] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [444,444] });
+        witness = await circuit.calculateWitness({ "in": [444,444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
     });
@@ -39,35 +39,35 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "lessthan.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": [333,444] });
+        witness = await circuit.calculateWitness({ "in": [333,444] }), true;
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in":[1,1] });
+        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [661, 660] });
+        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 1] });
+        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 444] });
+        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [1, 0] });
+        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [555, 0] });
+        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 0] });
+        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
     });
@@ -76,35 +76,35 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "lesseqthan.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": [333,444] });
+        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in":[1,1] });
+        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [661, 660] });
+        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 1] });
+        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 444] });
+        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [1, 0] });
+        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [555, 0] });
+        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 0] });
+        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
     });
@@ -113,35 +113,35 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "greaterthan.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": [333,444] });
+        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in":[1,1] });
+        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [661, 660] });
+        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 1] });
+        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 444] });
+        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [1, 0] });
+        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [555, 0] });
+        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 0] });
+        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
     });
@@ -149,35 +149,35 @@ describe("Comparators test", function ()  {
         const circuit = await tester(path.join(__dirname, "circuits", "greatereqthan.circom"));
 
         let witness;
-        witness = await circuit.calculateWitness({ "in": [333,444] });
+        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in":[1,1] });
+        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [661, 660] });
+        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 1] });
+        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 444] });
+        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(0)));
 
-        witness = await circuit.calculateWitness({ "in": [1, 0] });
+        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [555, 0] });
+        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
 
-        witness = await circuit.calculateWitness({ "in": [0, 0] });
+        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
         assert(witness[0].equals(bigInt(1)));
         assert(witness[1].equals(bigInt(1)));
     });
diff --git a/test/eddsa.js b/test/eddsa.js
index c74ebe9..7d2e02f 100644
--- a/test/eddsa.js
+++ b/test/eddsa.js
@@ -60,7 +60,7 @@ describe("EdDSA test", function () {
         const sBits = buffer2bits(pSignature.slice(32, 64));
         const aBits = buffer2bits(pPubKey);
 
-        const w = await circuit.calculateWitness({A: aBits, R8: r8Bits, S: sBits, msg: msgBits});
+        const w = await circuit.calculateWitness({A: aBits, R8: r8Bits, S: sBits, msg: msgBits}, true);
 
         await circuit.checkConstraints(w);
     });
diff --git a/test/eddsamimc.js b/test/eddsamimc.js
index bdb56fc..6e14fd6 100644
--- a/test/eddsamimc.js
+++ b/test/eddsamimc.js
@@ -35,7 +35,7 @@ describe("EdDSA MiMC test", function () {
             R8x: signature.R8[0],
             R8y: signature.R8[1],
             S: signature.S,
-            M: msg});
+            M: msg}, true);
 
 
         await circuit.checkConstraints(w);
@@ -61,7 +61,7 @@ describe("EdDSA MiMC test", function () {
                 R8x: signature.R8[0].add(bigInt(1)),
                 R8y: signature.R8[1],
                 S: signature.S,
-                M: msg});
+                M: msg}, true);
             assert(false);
         } catch(err) {
             assert(/Constraint\sdoesn't\smatch(.*)1\s!=\s0/.test(err.message) );
@@ -88,7 +88,7 @@ describe("EdDSA MiMC test", function () {
             R8x: signature.R8[0].add(bigInt(1)),
             R8y: signature.R8[1],
             S: signature.S,
-            M: msg});
+            M: msg}, true);
 
         await circuit.checkConstraints(w);
 
diff --git a/test/eddsaposeidon.js b/test/eddsaposeidon.js
index 3cc2f6e..31fad9c 100644
--- a/test/eddsaposeidon.js
+++ b/test/eddsaposeidon.js
@@ -2,7 +2,6 @@ const chai = require("chai");
 const path = require("path");
 const bigInt = require("big-integer");
 const tester = require("circom").tester;
-const utils = require("../src/utils");
 
 const eddsa = require("../src/eddsa.js");
 
@@ -42,7 +41,7 @@ describe("EdDSA Poseidon test", function () {
 
         // console.log(JSON.stringify(utils.stringifyBigInts(input)));
 
-        const w = await circuit.calculateWitness(input);
+        const w = await circuit.calculateWitness(input, true);
 
         await circuit.checkConstraints(w);
     });
@@ -66,7 +65,7 @@ describe("EdDSA Poseidon test", function () {
                 R8x: signature.R8[0].add(bigInt(1)),
                 R8y: signature.R8[1],
                 S: signature.S,
-                M: msg});
+                M: msg}, true);
             assert(false);
         } catch(err) {
             assert(/Constraint\sdoesn't\smatch(.*)1\s!=\s0/.test(err.message) );
@@ -93,7 +92,7 @@ describe("EdDSA Poseidon test", function () {
             R8x: signature.R8[0].add(bigInt(1)),
             R8y: signature.R8[1],
             S: signature.S,
-            M: msg});
+            M: msg}, true);
 
         await circuit.checkConstraints(w);
     });
diff --git a/test/escalarmulany.js b/test/escalarmulany.js
index ef3dfc9..3a831d0 100644
--- a/test/escalarmulany.js
+++ b/test/escalarmulany.js
@@ -27,7 +27,7 @@ describe("Escalarmul test", function () {
 
         await circuitEMulAny.checkConstraints(w);
 
-        await circuitEMulAny.assertOut(w, {out: g});
+        await circuitEMulAny.assertOut(w, {out: g}, true);
 
     });
 
@@ -38,7 +38,7 @@ describe("Escalarmul test", function () {
 
         await circuitEMulAny.checkConstraints(w);
 
-        await circuitEMulAny.assertOut(w, {out: [0,1]});
+        await circuitEMulAny.assertOut(w, {out: [0,1]}, true);
 
     });
 
diff --git a/test/escalarmulfix.js b/test/escalarmulfix.js
index 2d0a35c..2486695 100644
--- a/test/escalarmulfix.js
+++ b/test/escalarmulfix.js
@@ -25,13 +25,13 @@ describe("Escalarmul test", function () {
 
         await circuit.checkConstraints(w);
 
-        await circuit.assertOut(w, {out: [0,1]});
+        await circuit.assertOut(w, {out: [0,1]}, true);
 
     });
 
     it("Should generate Same escalar mul", async () => {
 
-        const w = await circuit.calculateWitness({"e": 1});
+        const w = await circuit.calculateWitness({"e": 1}, true);
 
         await circuit.checkConstraints(w);
 
@@ -47,7 +47,7 @@ describe("Escalarmul test", function () {
             bigInt("16950150798460657717958625567821834550301663161624707787222815936182638968203")
         ];
 
-        const w = await circuit.calculateWitness({"e": s});
+        const w = await circuit.calculateWitness({"e": s}, true);
 
         await circuit.checkConstraints(w);
 
@@ -67,7 +67,7 @@ describe("Escalarmul test", function () {
         for (let i=0; i<50; i++) {
             const s = bigInt(i);
 
-            const w = await circuit.calculateWitness({"e": s});
+            const w = await circuit.calculateWitness({"e": s}, true);
 
             await circuit.checkConstraints(w);
 
@@ -79,7 +79,7 @@ describe("Escalarmul test", function () {
 
     it("If multiply by order should return 0", async () => {
 
-        const w = await circuit.calculateWitness({"e": babyjub.subOrder });
+        const w = await circuit.calculateWitness({"e": babyjub.subOrder }, true);
 
         await circuit.checkConstraints(w);
 
diff --git a/test/mimccircuit.js b/test/mimccircuit.js
index ae14125..5601811 100644
--- a/test/mimccircuit.js
+++ b/test/mimccircuit.js
@@ -14,7 +14,7 @@ describe("MiMC Circuit test", function () {
     });
 
     it("Should check constrain", async () => {
-        const w = await circuit.calculateWitness({x_in: 1, k: 2});
+        const w = await circuit.calculateWitness({x_in: 1, k: 2}, true);
 
         const res2 = mimcjs.hash(1,2,91);
 
diff --git a/test/montgomery.js b/test/montgomery.js
index 50aea4c..d53fa5a 100644
--- a/test/montgomery.js
+++ b/test/montgomery.js
@@ -33,17 +33,17 @@ describe("Montgomery test", function () {
     it("Convert Edwards to Montgomery and back again", async () => {
         let w, xout, yout;
 
-        w = await circuitE2M.calculateWitness({ in: g});
+        w = await circuitE2M.calculateWitness({ in: g}, true);
 
-        xout = w[circuitE2M.symbols["main.out[0]"].idxWit];
-        yout = w[circuitE2M.symbols["main.out[1]"].idxWit];
+        xout = w[circuitE2M.symbols["main.out[0]"].varIdx];
+        yout = w[circuitE2M.symbols["main.out[1]"].varIdx];
 
         mg = [xout, yout];
 
-        w = await circuitM2E.calculateWitness({ in: [xout, yout]});
+        w = await circuitM2E.calculateWitness({ in: [xout, yout]}, true);
 
-        xout = w[circuitM2E.symbols["main.out[0]"].idxWit];
-        yout = w[circuitM2E.symbols["main.out[1]"].idxWit];
+        xout = w[circuitM2E.symbols["main.out[0]"].varIdx];
+        yout = w[circuitM2E.symbols["main.out[1]"].varIdx];
 
         assert(xout.equals(g[0]));
         assert(yout.equals(g[1]));
@@ -53,17 +53,17 @@ describe("Montgomery test", function () {
 
         g2 = babyJub.addPoint(g,g);
 
-        w = await circuitMDouble.calculateWitness({ in: mg});
+        w = await circuitMDouble.calculateWitness({ in: mg}, true);
 
-        xout = w[circuitE2M.symbols["main.out[0]"].idxWit];
-        yout = w[circuitE2M.symbols["main.out[1]"].idxWit];
+        xout = w[circuitE2M.symbols["main.out[0]"].varIdx];
+        yout = w[circuitE2M.symbols["main.out[1]"].varIdx];
 
         mg2 = [xout, yout];
 
-        w = await circuitM2E.calculateWitness({ in: mg2});
+        w = await circuitM2E.calculateWitness({ in: mg2}, true);
 
-        xout = w[circuitM2E.symbols["main.out[0]"].idxWit];
-        yout = w[circuitM2E.symbols["main.out[1]"].idxWit];
+        xout = w[circuitM2E.symbols["main.out[0]"].varIdx];
+        yout = w[circuitM2E.symbols["main.out[1]"].varIdx];
 
         assert(xout.equals(g2[0]));
         assert(yout.equals(g2[1]));
@@ -73,17 +73,17 @@ describe("Montgomery test", function () {
 
         g3 = babyJub.addPoint(g,g2);
 
-        w = await circuitMAdd.calculateWitness({ in1: mg, in2: mg2});
+        w = await circuitMAdd.calculateWitness({ in1: mg, in2: mg2}, true);
 
-        xout = w[circuitMAdd.symbols["main.out[0]"].idxWit];
-        yout = w[circuitMAdd.symbols["main.out[1]"].idxWit];
+        xout = w[circuitMAdd.symbols["main.out[0]"].varIdx];
+        yout = w[circuitMAdd.symbols["main.out[1]"].varIdx];
 
         mg3 = [xout, yout];
 
-        w = await circuitM2E.calculateWitness({ in: mg3});
+        w = await circuitM2E.calculateWitness({ in: mg3}, true);
 
-        xout = w[circuitM2E.symbols["main.out[0]"].idxWit];
-        yout = w[circuitM2E.symbols["main.out[1]"].idxWit];
+        xout = w[circuitM2E.symbols["main.out[0]"].varIdx];
+        yout = w[circuitM2E.symbols["main.out[1]"].varIdx];
 
         assert(xout.equals(g3[0]));
         assert(yout.equals(g3[1]));
diff --git a/test/multiplexer.js b/test/multiplexer.js
index 67b1975..01a8338 100644
--- a/test/multiplexer.js
+++ b/test/multiplexer.js
@@ -28,7 +28,7 @@ describe("Mux4 test", function() {
         ];
 
         for (let i=0; i<16; i++) {
-            const w = await circuit.calculateWitness({ "selector": i });
+            const w = await circuit.calculateWitness({ "selector": i }, true);
 
             await circuit.checkConstraints(w);
 
@@ -52,7 +52,7 @@ describe("Mux4 test", function() {
         ];
 
         for (let i=0; i<8; i++) {
-            const w = await circuit.calculateWitness({ "selector": i });
+            const w = await circuit.calculateWitness({ "selector": i }, true);
 
             await circuit.checkConstraints(w);
 
@@ -71,7 +71,7 @@ describe("Mux4 test", function() {
         ];
 
         for (let i=0; i<4; i++) {
-            const w = await circuit.calculateWitness({ "selector": i });
+            const w = await circuit.calculateWitness({ "selector": i }, true);
 
             await circuit.checkConstraints(w);
 
@@ -88,7 +88,7 @@ describe("Mux4 test", function() {
         ];
 
         for (let i=0; i<2; i++) {
-            const w = await circuit.calculateWitness({ "selector": i });
+            const w = await circuit.calculateWitness({ "selector": i }, true);
 
             await circuit.checkConstraints(w);
 
diff --git a/test/pedersen.js b/test/pedersen.js
index 8308987..5de9276 100644
--- a/test/pedersen.js
+++ b/test/pedersen.js
@@ -27,7 +27,7 @@ describe("Double Pedersen test", function() {
 
         let w;
 
-        w = await circuit.calculateWitness({ in: ["0", "0"]});
+        w = await circuit.calculateWitness({ in: ["0", "0"]}, true);
 
         await circuit.assertOut(w, {out: [0,1]});
 
@@ -35,7 +35,7 @@ describe("Double Pedersen test", function() {
     it("Should pedersen at one first generator", async () => {
         let w;
 
-        w = await circuit.calculateWitness({ in: ["1", "0"]});
+        w = await circuit.calculateWitness({ in: ["1", "0"]}, true);
 
         await circuit.assertOut(w, {out: PBASE[0]});
 
@@ -43,14 +43,14 @@ describe("Double Pedersen test", function() {
     it("Should pedersen at one second generator", async () => {
         let w;
 
-        w = await circuit.calculateWitness({ in: ["0", "1"]});
+        w = await circuit.calculateWitness({ in: ["0", "1"]}, true);
 
         await circuit.assertOut(w, {out: PBASE[1]});
 
     });
     it("Should pedersen at mixed generators", async () => {
         let w;
-        w = await circuit.calculateWitness({ in: ["3", "7"]});
+        w = await circuit.calculateWitness({ in: ["3", "7"]}, true);
 
         const r = babyJub.addPoint(
             babyJub.mulPointEscalar(PBASE[0], 3),
@@ -64,7 +64,7 @@ describe("Double Pedersen test", function() {
         let w;
 
         const allOnes = bigInt("1").shiftLeft(250).minus(bigInt("1"));
-        w = await circuit.calculateWitness({ in: [allOnes, allOnes]});
+        w = await circuit.calculateWitness({ in: [allOnes, allOnes]}, true);
 
 
         const r2 = babyJub.addPoint(
diff --git a/test/pedersen2.js b/test/pedersen2.js
index 9632374..9a9712d 100644
--- a/test/pedersen2.js
+++ b/test/pedersen2.js
@@ -18,7 +18,7 @@ describe("Pedersen test", function() {
 
         let w;
 
-        w = await circuit.calculateWitness({ in: 0});
+        w = await circuit.calculateWitness({ in: 0}, true);
 
         const b = Buffer.alloc(32);
 
@@ -34,7 +34,7 @@ describe("Pedersen test", function() {
 
         const n = bigInt.one.shiftLeft(253).minus(bigInt.one);
 
-        w = await circuit.calculateWitness({ in: n});
+        w = await circuit.calculateWitness({ in: n}, true);
 
         const b = Buffer.alloc(32);
         for (let i=0; i<31; i++) b[i] = 0xFF;
diff --git a/test/point2bits.js b/test/point2bits.js
index 48eb88e..f0697a1 100644
--- a/test/point2bits.js
+++ b/test/point2bits.js
@@ -11,12 +11,12 @@ describe("Point 2 bits test", function() {
         circuit = await tester(path.join(__dirname, "circuits", "pointbits_loopback.circom"));
     });
     it("Should do the both convertions for 8Base", async () => {
-        const w = await circuit.calculateWitness({ in: babyJub.Base8});
+        const w = await circuit.calculateWitness({ in: babyJub.Base8}, true);
 
         await circuit.checkConstraints(w);
     });
     it("Should do the both convertions for Zero point", async () => {
-        const w = await circuit.calculateWitness({ in: [0, 1]});
+        const w = await circuit.calculateWitness({ in: [0, 1]}, true);
 
         await circuit.checkConstraints(w);
     });
diff --git a/test/poseidoncircuit.js b/test/poseidoncircuit.js
index f1799aa..88f078a 100644
--- a/test/poseidoncircuit.js
+++ b/test/poseidoncircuit.js
@@ -28,7 +28,7 @@ describe("Poseidon Circuit test", function () {
     });
 
     it("Should check constrain of hash([1, 2])", async () => {
-        const w = await circuit.calculateWitness({inputs: [1, 2]});
+        const w = await circuit.calculateWitness({inputs: [1, 2]}, true);
 
         const hash = poseidon.createHash(6, 8, 57);
 
@@ -41,7 +41,7 @@ describe("Poseidon Circuit test", function () {
     });
 
     it("Should check constrain of hash([3, 4])", async () => {
-        const w = await circuit.calculateWitness({inputs: [3, 4]});
+        const w = await circuit.calculateWitness({inputs: [3, 4]}, true);
 
         const hash = poseidon.createHash(6, 8, 57);
 
diff --git a/test/sha256.js b/test/sha256.js
index 3b1cd62..e734490 100644
--- a/test/sha256.js
+++ b/test/sha256.js
@@ -46,13 +46,13 @@ describe("SHA256 test", function () {
         const a = buffer2bitArray(b);
         const b2 = bitArray2buffer(a);
 
-        assert.equal(b.toString("hex"), b2.toString("hex"));
+        assert.equal(b.toString("hex"), b2.toString("hex"), true);
     });
 
     it("Should calculate a hash of 1 compressor", async () => {
         const cir = await tester(path.join(__dirname, "circuits", "sha256_2_test.circom"));
 
-        const witness = await cir.calculateWitness({ "a": "1", "b": "2" });
+        const witness = await cir.calculateWitness({ "a": "1", "b": "2" }, true);
 
         const b = new Buffer.alloc(54);
         b[26] = 1;
@@ -83,7 +83,7 @@ describe("SHA256 test", function () {
             .digest("hex");
 
         const arrIn = buffer2bitArray(b);
-        const witness = await cir.calculateWitness({ "in": arrIn });
+        const witness = await cir.calculateWitness({ "in": arrIn }, true);
 
         const arrOut = witness.slice(1, 257);
         const hash2 = bitArray2buffer(arrOut).toString("hex");
@@ -104,7 +104,7 @@ describe("SHA256 test", function () {
 
         const arrIn = buffer2bitArray(b);
 
-        const witness = await cir.calculateWitness({ "in": arrIn });
+        const witness = await cir.calculateWitness({ "in": arrIn }, true);
 
         const arrOut = witness.slice(1, 257);
         const hash2 = bitArray2buffer(arrOut).toString("hex");
diff --git a/test/sign.js b/test/sign.js
index 49715de..b3e9452 100644
--- a/test/sign.js
+++ b/test/sign.js
@@ -30,49 +30,49 @@ describe("Sign test", function() {
 
     it("Sign of 0", async () => {
         const inp = getBits(bigInt.zero, 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 0});
     });
 
     it("Sign of 3", async () => {
         const inp = getBits(bigInt(3), 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 0});
     });
 
     it("Sign of q/2", async () => {
         const inp = getBits(q.shiftRight(bigInt.one), 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 0});
     });
 
     it("Sign of q/2+1", async () => {
         const inp = getBits(q.shiftRight(bigInt.one).add(bigInt.one), 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 1});
     });
 
     it("Sign of q-1", async () => {
         const inp = getBits(q.minus(bigInt.one), 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 1});
     });
 
     it("Sign of q", async () => {
         const inp = getBits(q, 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 1});
     });
 
     it("Sign of all ones", async () => {
         const inp = getBits(bigInt(1).shiftLeft(254).minus(bigInt(1)), 254);
-        const w = await circuit.calculateWitness({in: inp});
+        const w = await circuit.calculateWitness({in: inp}, true);
 
         await circuit.assertOut(w, {sign: 1});
     });
diff --git a/test/smtprocessor.js b/test/smtprocessor.js
index 8467073..e257707 100644
--- a/test/smtprocessor.js
+++ b/test/smtprocessor.js
@@ -11,7 +11,7 @@ function print(circuit, w, s) {
     console.log(s + ": " + w[circuit.getSignalIdx(s)]);
 }
 
-async function testInsert(tree, key, value, circuit, log ) {
+async function testInsert(tree, key, value, circuit ) {
 
     const res = await tree.insert(key,value);
     let siblings = res.siblings;
@@ -26,7 +26,7 @@ async function testInsert(tree, key, value, circuit, log ) {
         isOld0: res.isOld0 ? 1 : 0,
         newKey: key,
         newValue: value
-    }, log);
+    }, true);
 
     await circuit.checkConstraints(w);
 
@@ -48,7 +48,7 @@ async function testDelete(tree, key, circuit) {
         isOld0: res.isOld0 ? 1 : 0,
         newKey: res.delKey,
         newValue: res.delValue
-    });
+    }, true);
 
     await circuit.checkConstraints(w);
 
@@ -182,8 +182,8 @@ describe("SMT Processor test", function () {
             newValue: 77
         });
 
-        const root1 = w[circuit.symbols["main.oldRoot"].idxWit];
-        const root2 = w[circuit.symbols["main.newRoot"].idxWit];
+        const root1 = w[circuit.symbols["main.oldRoot"].varIdx];
+        const root2 = w[circuit.symbols["main.newRoot"].varIdx];
 
         await circuit.checkConstraints(w);
 
diff --git a/test/smtverifier.js b/test/smtverifier.js
index 475dd4d..f5992ad 100644
--- a/test/smtverifier.js
+++ b/test/smtverifier.js
@@ -29,7 +29,7 @@ async function testInclusion(tree, key, circuit) {
         isOld0: 0,
         key: key,
         value: res.foundValue
-    });
+    }, true);
 
     await circuit.checkConstraints(w);