diff --git a/contract/package.json b/contract/package.json
index 64e860a8..68e9b3b8 100644
--- a/contract/package.json
+++ b/contract/package.json
@@ -47,7 +47,7 @@
     "solhint": "^3.3.7",
     "solidity-coverage": "^0.7.21",
     "ts-node": "^10.8.1",
-    "typechain": "^5.2.0",
+    "typechain": "^8.0.0",
     "typescript": "^4.7.3"
   }
 }
diff --git a/package-lock.json b/package-lock.json
index c303cd94..f33d507e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,7 @@
         "@nestjs/mapped-types": "*",
         "@nestjs/passport": "^8.2.1",
         "@nestjs/platform-express": "^8.4.6",
-        "@nestjs/swagger": "^5.2.0",
+        "@nestjs/swagger": "^5.2.1",
         "cache-manager": "^4.0.1",
         "class-transformer": "^0.5.1",
         "class-validator": "^0.13.2",
@@ -198,7 +198,7 @@
         "solhint": "^3.3.7",
         "solidity-coverage": "^0.7.21",
         "ts-node": "^10.8.1",
-        "typechain": "^5.2.0",
+        "typechain": "^8.0.0",
         "typescript": "^4.7.3"
       }
     },
@@ -401,6 +401,94 @@
         "node": ">= 4"
       }
     },
+    "contract/node_modules/fs-extra": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
+      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+      "dev": true,
+      "dependencies": {
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      },
+      "engines": {
+        "node": ">=6 <7 || >=8"
+      }
+    },
+    "contract/node_modules/glob": {
+      "version": "7.1.7",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
+      "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
+      "dev": true,
+      "dependencies": {
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.0.4",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
+      },
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
+    "contract/node_modules/jsonfile": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+      "integrity": "sha512-m6F1R3z8jjlf2imQHS2Qez5sjKWQzbuuhuJ/FKYFRZvPE3PuHcSMVZzfsLhGVOkfd20obL5SWEBew5ShlquNxg==",
+      "dev": true,
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
+    "contract/node_modules/mkdirp": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
+      "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
+      "dev": true,
+      "bin": {
+        "mkdirp": "bin/cmd.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "contract/node_modules/typechain": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/typechain/-/typechain-8.0.0.tgz",
+      "integrity": "sha512-rqDfDYc9voVAhmfVfAwzg3VYFvhvs5ck1X9T/iWkX745Cul4t+V/smjnyqrbDzWDbzD93xfld1epg7Y/uFAesQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/prettier": "^2.1.1",
+        "debug": "^4.3.1",
+        "fs-extra": "^7.0.0",
+        "glob": "7.1.7",
+        "js-sha3": "^0.8.0",
+        "lodash": "^4.17.15",
+        "mkdirp": "^1.0.4",
+        "prettier": "^2.3.1",
+        "ts-command-line-args": "^2.2.0",
+        "ts-essentials": "^7.0.1"
+      },
+      "bin": {
+        "typechain": "dist/cli/cli.js"
+      },
+      "peerDependencies": {
+        "typescript": ">=4.3.0"
+      }
+    },
+    "contract/node_modules/universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 4.0.0"
+      }
+    },
     "node_modules/@ampproject/remapping": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.2.0.tgz",
@@ -13074,6 +13162,110 @@
         "command-line-args": "bin/cli.js"
       }
     },
+    "node_modules/command-line-usage": {
+      "version": "6.1.3",
+      "resolved": "https://registry.npmjs.org/command-line-usage/-/command-line-usage-6.1.3.tgz",
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+      "dev": true,
+      "dependencies": {
+        "array-back": "^4.0.2",
+        "chalk": "^2.4.2",
+        "table-layout": "^1.0.2",
+        "typical": "^5.2.0"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
+    "node_modules/command-line-usage/node_modules/ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "dependencies": {
+        "color-convert": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/command-line-usage/node_modules/array-back": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/array-back/-/array-back-4.0.2.tgz",
+      "integrity": "sha512-NbdMezxqf94cnNfWLL7V/im0Ub+Anbb0IoZhvzie8+4HJ4nMQuzHuy49FkGYCJK2yAloZ3meiB6AVMClbrI1vg==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
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+    "node_modules/command-line-usage/node_modules/chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
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+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
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+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
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+      "dev": true
+    },
+    "node_modules/command-line-usage/node_modules/escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
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+    "node_modules/command-line-usage/node_modules/has-flag": {
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+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/command-line-usage/node_modules/supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/command-line-usage/node_modules/typical": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/typical/-/typical-5.2.0.tgz",
+      "integrity": "sha512-dvdQgNDNJo+8B2uBQoqdb11eUCE1JQXhvjC/CZtgvZseVd5TYMXnq0+vuUemXbd/Se29cTaUuPX3YIc2xgbvIg==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/commander": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
@@ -14245,6 +14437,15 @@
         "node": ">=0.12"
       }
     },
+    "node_modules/deep-extend": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
+      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==",
+      "dev": true,
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
     "node_modules/deep-is": {
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       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
@@ -32467,6 +32668,12 @@
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     },
+    "node_modules/lodash.camelcase": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz",
+      "integrity": "sha512-TwuEnCnxbc3rAvhf/LbG7tJUDzhqXyFnv3dtzLOPgCG/hODL7WFnsbwktkD7yUV0RrreP/l1PALq/YSg6VvjlA==",
+      "dev": true
+    },
     "node_modules/lodash.clonedeep": {
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       "resolved": "https://registry.npmjs.org/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz",
@@ -37904,6 +38111,15 @@
         "node": ">=8"
       }
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/reduce-flatten/-/reduce-flatten-2.0.0.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">=6"
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       "resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.1.13.tgz",
@@ -40800,6 +41016,12 @@
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/string-format/-/string-format-2.0.0.tgz",
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+    },
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@@ -41544,6 +41766,39 @@
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+      "resolved": "https://registry.npmjs.org/table-layout/-/table-layout-1.0.2.tgz",
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+      "dependencies": {
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+        "deep-extend": "~0.6.0",
+        "typical": "^5.2.0",
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+      "engines": {
+        "node": ">=8.0.0"
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+      "resolved": "https://registry.npmjs.org/array-back/-/array-back-4.0.2.tgz",
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+      "dev": true,
+      "engines": {
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+      }
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+    "node_modules/table-layout/node_modules/typical": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/typical/-/typical-5.2.0.tgz",
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+      "resolved": "https://registry.npmjs.org/ts-command-line-args/-/ts-command-line-args-2.3.1.tgz",
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+      "dev": true,
+      "dependencies": {
+        "chalk": "^4.1.0",
+        "command-line-args": "^5.1.1",
+        "command-line-usage": "^6.1.0",
+        "string-format": "^2.0.0"
+      },
+      "bin": {
+        "write-markdown": "dist/write-markdown.js"
+      }
+    },
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+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/array-back/-/array-back-3.1.0.tgz",
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+      "dev": true,
+      "engines": {
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