diff --git a/package-lock.json b/package-lock.json
index 7e624f9..e4724ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,38 @@
 {
   "name": "web3t",
-  "version": "0.6.8",
+  "version": "0.7.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@types/bn.js": {
+      "version": "4.11.6",
+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.6.tgz",
+      "integrity": "sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/node": {
+      "version": "17.0.17",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-17.0.17.tgz",
+      "integrity": "sha512-e8PUNQy1HgJGV3iU/Bp2+D/DXh3PYeyli8LgIwsQcs1Ar1LoaWHSIT6Rw+H2rNJmiq6SNWiDytfx8+gYj7wDHw=="
+    },
+    "@types/pbkdf2": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@types/pbkdf2/-/pbkdf2-3.1.0.tgz",
+      "integrity": "sha512-Cf63Rv7jCQ0LaL8tNXmEyqTHuIJxRdlS5vMh1mj5voN4+QFhVZnlZruezqpWYDiJ8UTzhP0VmeLXCmBk66YrMQ==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/secp256k1": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.3.tgz",
+      "integrity": "sha512-Da66lEIFeIz9ltsdMZcpQvmrmmoqrfju8pm1BH8WbYjZSwUgCwXLb9C+9XYogwBITnbsSaMdVPb2ekf7TV+03w==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "aes-js": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-3.1.2.tgz",
@@ -18,9 +47,9 @@
       }
     },
     "ajv": {
-      "version": "6.12.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz",
-      "integrity": "sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "requires": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -146,6 +175,11 @@
         "wif": "^2.0.1"
       }
     },
+    "blakejs": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.1.tgz",
+      "integrity": "sha512-bLG6PHOCZJKNshTjGRBvET0vTciwQE6zFKOKKXPDJfwFBd4Ac0yBfPZqcGvGJap50l7ktvlpFqc2jGVaUgbJgg=="
+    },
     "bn.js": {
       "version": "4.11.8",
       "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
@@ -364,11 +398,87 @@
         "es6-promise": "^4.0.3"
       }
     },
+    "ethereum-cryptography": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/ethereum-cryptography/-/ethereum-cryptography-0.1.3.tgz",
+      "integrity": "sha512-w8/4x1SGGzc+tO97TASLja6SLd3fRIK2tLVcV2Gx4IB21hE19atll5Cq9o3d0ZmAYC/8aw0ipieTSiekAea4SQ==",
+      "requires": {
+        "@types/pbkdf2": "^3.0.0",
+        "@types/secp256k1": "^4.0.1",
+        "blakejs": "^1.1.0",
+        "browserify-aes": "^1.2.0",
+        "bs58check": "^2.1.2",
+        "create-hash": "^1.2.0",
+        "create-hmac": "^1.1.7",
+        "hash.js": "^1.1.7",
+        "keccak": "^3.0.0",
+        "pbkdf2": "^3.0.17",
+        "randombytes": "^2.1.0",
+        "safe-buffer": "^5.1.2",
+        "scrypt-js": "^3.0.0",
+        "secp256k1": "^4.0.1",
+        "setimmediate": "^1.0.5"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+        },
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
+          }
+        },
+        "secp256k1": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-4.0.3.tgz",
+          "integrity": "sha512-NLZVf+ROMxwtEj3Xa562qgv2BK5e2WNmXPiOdVIPLgs6lyTzMvBq0aWTYMI5XCP9jZMVKOcqZLw/Wc4vDkuxhA==",
+          "requires": {
+            "elliptic": "^6.5.4",
+            "node-addon-api": "^2.0.0",
+            "node-gyp-build": "^4.2.0"
+          }
+        }
+      }
+    },
     "ethereumjs-common": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/ethereumjs-common/-/ethereumjs-common-1.5.0.tgz",
       "integrity": "sha512-SZOjgK1356hIY7MRj3/ma5qtfr/4B5BL+G4rP/XSMYr2z1H5el4RX5GReYCKmQmYI/nSBmRnwrZ17IfHuG0viQ=="
     },
+    "ethereumjs-util": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.1.tgz",
+      "integrity": "sha512-W2Ktez4L01Vexijrm5EB6w7dg4n/TgpoYU4avuT5T3Vmnw/eCRtiBrJfQYS/DCSvDIOLn2k57GcHdeBcgVxAqw==",
+      "requires": {
+        "@types/bn.js": "^4.11.3",
+        "bn.js": "^4.11.0",
+        "create-hash": "^1.1.2",
+        "elliptic": "^6.5.2",
+        "ethereum-cryptography": "^0.1.3",
+        "ethjs-util": "0.1.6",
+        "rlp": "^2.2.3"
+      }
+    },
+    "ethjs-util": {
+      "version": "0.1.6",
+      "resolved": "https://registry.npmjs.org/ethjs-util/-/ethjs-util-0.1.6.tgz",
+      "integrity": "sha512-CUnVOQq7gSpDHZVVrQW8ExxUETWrnrvXYvYz55wOU8Uj4VCgw56XC2B/fVqQN+f7gmrnRHSLVnFAwsCuNwji8w==",
+      "requires": {
+        "is-hex-prefixed": "1.0.0",
+        "strip-hex-prefix": "1.0.0"
+      }
+    },
     "evp_bytestokey": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz",
@@ -504,6 +614,11 @@
       "resolved": "https://registry.npmjs.org/ip/-/ip-1.1.5.tgz",
       "integrity": "sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo="
     },
+    "is-hex-prefixed": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-hex-prefixed/-/is-hex-prefixed-1.0.0.tgz",
+      "integrity": "sha1-fY035q135dEnFIkTxXPggtd39VQ="
+    },
     "is-typedarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
@@ -545,6 +660,16 @@
         "verror": "1.10.0"
       }
     },
+    "keccak": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/keccak/-/keccak-3.0.2.tgz",
+      "integrity": "sha512-PyKKjkH53wDMLGrvmRGSNWgmSxZOUqbnXwKL9tmgbFYA1iAYqW21kfR7mZXV0MlESiefxQQE9X9fTa3X+2MPDQ==",
+      "requires": {
+        "node-addon-api": "^2.0.0",
+        "node-gyp-build": "^4.2.0",
+        "readable-stream": "^3.6.0"
+      }
+    },
     "levn": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
@@ -615,11 +740,21 @@
       "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
       "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
     },
+    "node-addon-api": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-2.0.2.tgz",
+      "integrity": "sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA=="
+    },
     "node-fetch": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
       "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA=="
     },
+    "node-gyp-build": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.3.0.tgz",
+      "integrity": "sha512-iWjXZvmboq0ja1pUGULQBexmxq8CV4xBhX7VDOTbL7ZR4FOowwY/VOtRxBN/yKxmdGoIp4j5ysNT4u3S2pDQ3Q=="
+    },
     "oauth-sign": {
       "version": "0.9.0",
       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -692,6 +827,16 @@
         "safe-buffer": "^5.1.0"
       }
     },
+    "readable-stream": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+      "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+      "requires": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      }
+    },
     "request": {
       "version": "2.88.2",
       "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
@@ -728,6 +873,21 @@
         "inherits": "^2.0.1"
       }
     },
+    "rlp": {
+      "version": "2.2.7",
+      "resolved": "https://registry.npmjs.org/rlp/-/rlp-2.2.7.tgz",
+      "integrity": "sha512-d5gdPmgQ0Z+AklL2NVXr/IoSjNZFfTVvQWzL/AM2AOcSzYP2xjlb0AC8YyCLc41MSNf6P6QVtjgPdmVtzb+4lQ==",
+      "requires": {
+        "bn.js": "^5.2.0"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.0.tgz",
+          "integrity": "sha512-D7iWRBvnZE8ecXiLj/9wbxH7Tk79fAh8IHaTNq1RWRixsS02W+5qS+iE9yq6RYl0asXx5tw0bLhmT5pIfbSquw=="
+        }
+      }
+    },
     "safe-buffer": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
@@ -738,6 +898,11 @@
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
+    "scrypt-js": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-3.0.1.tgz",
+      "integrity": "sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA=="
+    },
     "secp256k1": {
       "version": "3.8.0",
       "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-3.8.0.tgz",
@@ -753,6 +918,11 @@
         "safe-buffer": "^5.1.2"
       }
     },
+    "setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU="
+    },
     "sha.js": {
       "version": "2.4.11",
       "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
@@ -817,6 +987,22 @@
         "tweetnacl": "~0.14.0"
       }
     },
+    "string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "requires": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
+    "strip-hex-prefix": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/strip-hex-prefix/-/strip-hex-prefix-1.0.0.tgz",
+      "integrity": "sha1-DF8VX+8RUTczd96du1iNoFUA428=",
+      "requires": {
+        "is-hex-prefixed": "1.0.0"
+      }
+    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
@@ -886,6 +1072,11 @@
       "resolved": "https://registry.npmjs.org/utf8/-/utf8-3.0.0.tgz",
       "integrity": "sha512-E8VjFIQ/TyQgp+TZfS6l8yp/xWppSAHzidGiRrqe4bK4XP9pTRyKFgGJpO3SN7zdX4DeomTrwaseCHovfpFcqQ=="
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
     "uuid": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",