diff --git a/.eslintrc b/.eslintrc
index 7351f4d..e97644f 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -1,4 +1,3 @@
-  
 {
   "parser": "@typescript-eslint/parser",
   "plugins": [
@@ -15,11 +14,22 @@
   ],
   "settings": {
     "import/resolver": {
-      "typescript": {}
+      "node": {
+        "extensions": [".ts"]
+      }
     }
   },
   "rules": {
+    "no-useless-constructor": "off",
+    "class-methods-use-this": "off",
+    "@typescript-eslint/no-explicit-any": "off",
     "import/no-extraneous-dependencies": "off",
-    "import/prefer-default-export": "off"
+    "import/prefer-default-export": "off",
+    "import/extensions": [
+      "error",
+      {
+        "ts": "never"
+      }
+    ]
   }
 }
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 3fdf1b0..54ceb4d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,103 @@
         "@babel/highlight": "^7.8.3"
       }
     },
+    "@babel/core": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.8.6.tgz",
+      "integrity": "sha512-Sheg7yEJD51YHAvLEV/7Uvw95AeWqYPL3Vk3zGujJKIhJ+8oLw2ALaf3hbucILhKsgSoADOvtKRJuNVdcJkOrg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.6",
+        "@babel/helpers": "^7.8.4",
+        "@babel/parser": "^7.8.6",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.6",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/generator": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.8.6.tgz",
+      "integrity": "sha512-4bpOR5ZBz+wWcMeVtcf7FbjcFzCp+817z2/gHNncIRcM9MmKzUhtWCYAq27RAfUrAFwb+OCG1s9WEaVxfi6cjg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.6",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.13",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.8.3.tgz",
+      "integrity": "sha512-BCxgX1BC2hD/oBlIFUgOCQDOPV8nSINxCwM3o93xP4P9Fq6aV5sgv2cOOITDMtCfQ+3PvHp3l689XZvAM9QyOA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-get-function-arity": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-get-function-arity": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz",
+      "integrity": "sha512-FVDR+Gd9iLjUMY1fzE2SR0IuaJToR4RkCDARVfsBBPSP53GEqSFjD8gNyxg246VUyc/ALRxFaAK8rVG7UT7xRA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz",
+      "integrity": "sha512-3x3yOeyBhW851hroze7ElzdkeRXQYQbFIb7gLK1WQYsw2GWDay5gAJNw1sWJ0VFP6z5J1whqeXH/WCdCjZv6dA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helpers": {
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.8.4.tgz",
+      "integrity": "sha512-VPbe7wcQ4chu4TDQjimHv/5tj73qz88o12EPkO2ValS2QiQS/1F2SsjyIGNnAD0vF/nZS6Cf9i+vW6HIlnaR8w==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.4",
+        "@babel/types": "^7.8.3"
+      }
+    },
     "@babel/highlight": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
@@ -24,6 +121,85 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@babel/parser": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.8.6.tgz",
+      "integrity": "sha512-trGNYSfwq5s0SgM1BMEB8hX3NDmO7EP2wsDGDexiaKMB92BaRpS+qZfpkMqUBhcsOTBwNy9B/jieo4ad/t/z2g==",
+      "dev": true
+    },
+    "@babel/template": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.8.6.tgz",
+      "integrity": "sha512-zbMsPMy/v0PWFZEhQJ66bqjhH+z0JgMoBWuikXybgG3Gkd/3t5oQ1Rw2WQhnSrsOmsKXnZOx15tkC4qON/+JPg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/parser": "^7.8.6",
+        "@babel/types": "^7.8.6"
+      }
+    },
+    "@babel/traverse": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.8.6.tgz",
+      "integrity": "sha512-2B8l0db/DPi8iinITKuo7cbPznLCEk0kCxDoB9/N6gGNg/gxOXiR/IcymAFPiBwk5w6TtQ27w4wpElgp9btR9A==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.6",
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/parser": "^7.8.6",
+        "@babel/types": "^7.8.6",
+        "debug": "^4.1.0",
+        "globals": "^11.1.0",
+        "lodash": "^4.17.13"
+      },
+      "dependencies": {
+        "globals": {
+          "version": "11.12.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz",
+          "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==",
+          "dev": true
+        }
+      }
+    },
+    "@babel/types": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.8.6.tgz",
+      "integrity": "sha512-wqz7pgWMIrht3gquyEFPVXeXCti72Rm8ep9b5tQKz9Yg9LzJA3HxosF1SB3Kc81KD1A3XBkkVYtJvCKS2Z/QrA==",
+      "dev": true,
+      "requires": {
+        "esutils": "^2.0.2",
+        "lodash": "^4.17.13",
+        "to-fast-properties": "^2.0.0"
+      }
+    },
+    "@istanbuljs/load-nyc-config": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0.tgz",
+      "integrity": "sha512-ZR0rq/f/E4f4XcgnDvtMWXCUJpi8eO0rssVhmztsZqLIEFA9UUP9zmpE0VxlM+kv/E1ul2I876Fwil2ayptDVg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.3.1",
+        "find-up": "^4.1.0",
+        "js-yaml": "^3.13.1",
+        "resolve-from": "^5.0.0"
+      },
+      "dependencies": {
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@istanbuljs/schema": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.2.tgz",
+      "integrity": "sha512-tsAQNx32a8CoFhjhijUIhI4kccIAgmGhy8LZMZgGfmXcpMbPRUqn5LWmgRttILi6yeGmBJd2xsPkFMs0PzgPCw==",
+      "dev": true
+    },
     "@types/chai": {
       "version": "4.2.9",
       "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.9.tgz",
@@ -48,18 +224,18 @@
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       "dev": true
     },
-    "@types/json5": {
-      "version": "0.0.29",
-      "resolved": "https://registry.npmjs.org/@types/json5/-/json5-0.0.29.tgz",
-      "integrity": "sha1-7ihweulOEdK4J7y+UnC86n8+ce4=",
-      "dev": true
-    },
     "@types/mocha": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-7.0.1.tgz",
       "integrity": "sha512-L/Nw/2e5KUaprNJoRA33oly+M8X8n0K+FwLTbYqwTcR14wdPWeRkigBLfSFpN/Asf9ENZTMZwLxjtjeYucAA4Q==",
       "dev": true
     },
+    "@types/node": {
+      "version": "13.7.7",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.7.7.tgz",
+      "integrity": "sha512-Uo4chgKbnPNlxQwoFmYIwctkQVkMMmsAoGGU4JKwLuvBefF0pCq4FybNSnfkfRCpC7ZW7kttcC/TrRtAJsvGtg==",
+      "dev": true
+    },
     "@typescript-eslint/eslint-plugin": {
       "version": "2.21.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.21.0.tgz",
@@ -131,6 +307,16 @@
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       "dev": true
     },
+    "aggregate-error": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.0.1.tgz",
+      "integrity": "sha512-quoaXsZ9/BLNae5yiNoUz+Nhkwz83GhWwtYFglcjEQB2NDHCIpApbqXxIFnm4Pq/Nvhrsq5sYJFyohrrxnTGAA==",
+      "dev": true,
+      "requires": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      }
+    },
     "ajv": {
       "version": "6.12.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.0.tgz",
@@ -203,6 +389,21 @@
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       "dev": true
     },
+    "append-transform": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-2.0.0.tgz",
+      "integrity": "sha512-7yeyCEurROLQJFv5Xj4lEGTy0borxepjFv1g22oAdqFu//SrAlDl1O1Nxx15SH1RoliUml6p8dwJW9jvZughhg==",
+      "dev": true,
+      "requires": {
+        "default-require-extensions": "^3.0.0"
+      }
+    },
+    "archy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/archy/-/archy-1.0.0.tgz",
+      "integrity": "sha1-+cjBN1fMHde8N5rHeyxipcKGjEA=",
+      "dev": true
+    },
     "arg": {
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
@@ -316,6 +517,18 @@
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       "dev": true
     },
+    "caching-transform": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/caching-transform/-/caching-transform-4.0.0.tgz",
+      "integrity": "sha512-kpqOvwXnjjN44D89K5ccQC+RUrsy7jB/XLlRrx0D7/2HNcTPqzsb6XgYoErwko6QsV184CA2YgS1fxDiiDZMWA==",
+      "dev": true,
+      "requires": {
+        "hasha": "^5.0.0",
+        "make-dir": "^3.0.0",
+        "package-hash": "^4.0.0",
+        "write-file-atomic": "^3.0.0"
+      }
+    },
     "callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -381,6 +594,12 @@
         "readdirp": "~3.2.0"
       }
     },
+    "clean-stack": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
+      "integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==",
+      "dev": true
+    },
     "cli-cursor": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-3.1.0.tgz",
@@ -507,6 +726,12 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
+    "commondir": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
+      "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=",
+      "dev": true
+    },
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -525,6 +750,23 @@
       "integrity": "sha1-/ozxhP9mcLa67wGp1IYaXL7EEgo=",
       "dev": true
     },
+    "convert-source-map": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
+      "integrity": "sha512-4FJkXzKXEDB1snCFZlLP4gpC3JILicCpGbzG9f9G7tGqGCzETQ2hWPrcinA9oU4wtf2biUaEH5065UnMeR33oA==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "~5.1.1"
+      },
+      "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==",
+          "dev": true
+        }
+      }
+    },
     "cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -576,6 +818,23 @@
       "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=",
       "dev": true
     },
+    "default-require-extensions": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/default-require-extensions/-/default-require-extensions-3.0.0.tgz",
+      "integrity": "sha512-ek6DpXq/SCpvjhpFsLFRVtIxJCRw6fUR42lYMVZuUMK7n8eMz4Uh5clckdBjEpLhn/gEBZo7hDJnJcwdKLKQjg==",
+      "dev": true,
+      "requires": {
+        "strip-bom": "^4.0.0"
+      },
+      "dependencies": {
+        "strip-bom": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-4.0.0.tgz",
+          "integrity": "sha512-3xurFv5tEgii33Zi8Jtp55wEIILR9eh34FAW00PZf+JnSsTmV/ioewSgQl97JHvgjoRGwPShsWm+IdrxB35d0w==",
+          "dev": true
+        }
+      }
+    },
     "define-properties": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
@@ -651,6 +910,12 @@
         "is-symbol": "^1.0.2"
       }
     },
+    "es6-error": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/es6-error/-/es6-error-4.1.1.tgz",
+      "integrity": "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg==",
+      "dev": true
+    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -757,19 +1022,6 @@
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       }
     },
-    "eslint-import-resolver-typescript": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-import-resolver-typescript/-/eslint-import-resolver-typescript-2.0.0.tgz",
-      "integrity": "sha512-bT5Frpl8UWoHBtY25vKUOMoVIMlJQOMefHLyQ4Tz3MQpIZ2N6yYKEEIHMo38bszBNUuMBW6M3+5JNYxeiGFH4w==",
-      "dev": true,
-      "requires": {
-        "debug": "^4.1.1",
-        "is-glob": "^4.0.1",
-        "resolve": "^1.12.0",
-        "tiny-glob": "^0.2.6",
-        "tsconfig-paths": "^3.9.0"
-      }
-    },
     "eslint-module-utils": {
       "version": "2.5.2",
       "resolved": "https://registry.npmjs.org/eslint-module-utils/-/eslint-module-utils-2.5.2.tgz",
@@ -978,6 +1230,28 @@
         "to-regex-range": "^5.0.1"
       }
     },
+    "find-cache-dir": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-3.3.0.tgz",
+      "integrity": "sha512-PtXtQb7IrD8O+h6Cq1dbpJH5NzD8+9keN1zZ0YlpDzl1PwXEJEBj6u1Xa92t1Hwluoozd9TNKul5Hi2iqpsWwg==",
+      "dev": true,
+      "requires": {
+        "commondir": "^1.0.1",
+        "make-dir": "^3.0.2",
+        "pkg-dir": "^4.1.0"
+      },
+      "dependencies": {
+        "pkg-dir": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
+          "integrity": "sha512-HRDzbaKjC+AOWVXxAU/x54COGeIv9eb+6CkDSQoNTt4XyWoIJvuPsXizxu/Fr23EiekbtZwmh1IcIG/l/a10GQ==",
+          "dev": true,
+          "requires": {
+            "find-up": "^4.0.0"
+          }
+        }
+      }
+    },
     "find-up": {
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+        "convert-source-map": "^1.7.0",
+        "decamelize": "^1.2.0",
+        "find-cache-dir": "^3.2.0",
+        "find-up": "^4.1.0",
+        "foreground-child": "^2.0.0",
+        "glob": "^7.1.6",
+        "istanbul-lib-coverage": "^3.0.0",
+        "istanbul-lib-hook": "^3.0.0",
+        "istanbul-lib-instrument": "^4.0.0",
+        "istanbul-lib-processinfo": "^2.0.2",
+        "istanbul-lib-report": "^3.0.0",
+        "istanbul-lib-source-maps": "^4.0.0",
+        "istanbul-reports": "^3.0.0",
+        "js-yaml": "^3.13.1",
+        "make-dir": "^3.0.0",
+        "node-preload": "^0.2.0",
+        "p-map": "^3.0.0",
+        "process-on-spawn": "^1.0.0",
+        "resolve-from": "^5.0.0",
+        "rimraf": "^3.0.0",
+        "signal-exit": "^3.0.2",
+        "spawn-wrap": "^2.0.0",
+        "test-exclude": "^6.0.0",
+        "uuid": "^3.3.3",
+        "yargs": "^15.0.2"
+      },
+      "dependencies": {
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        },
+        "yargs": {
+          "version": "15.1.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.1.0.tgz",
+          "integrity": "sha512-T39FNN1b6hCW4SOIk1XyTOWxtXdcen0t+XYrysQmChzSipvhBO8Bj0nK1ozAasdk24dNWuMZvr4k24nz+8HHLg==",
+          "dev": true,
+          "requires": {
+            "cliui": "^6.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^4.1.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^4.2.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^16.1.0"
+          }
+        }
+      }
+    },
     "object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -1850,12 +2447,33 @@
         "p-limit": "^2.2.0"
       }
     },
+    "p-map": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/p-map/-/p-map-3.0.0.tgz",
+      "integrity": "sha512-d3qXVTF/s+W+CdJ5A29wywV2n8CQQYahlgz2bFiA+4eVNJbHJodPZ+/gXwPGh0bOqA+j8S+6+ckmvLGPk1QpxQ==",
+      "dev": true,
+      "requires": {
+        "aggregate-error": "^3.0.0"
+      }
+    },
     "p-try": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
       "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
       "dev": true
     },
+    "package-hash": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/package-hash/-/package-hash-4.0.0.tgz",
+      "integrity": "sha512-whdkPIooSu/bASggZ96BWVvZTRMOFxnyUG5PnTSGKoJE2gd5mbVNmR2Nj20QFzxYYgAXpoqC+AiXzl+UMRh7zQ==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.15",
+        "hasha": "^5.0.0",
+        "lodash.flattendeep": "^4.4.0",
+        "release-zalgo": "^1.0.0"
+      }
+    },
     "packet-reader": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/packet-reader/-/packet-reader-1.0.0.tgz",
@@ -2115,6 +2733,15 @@
       "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
       "dev": true
     },
+    "process-on-spawn": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/process-on-spawn/-/process-on-spawn-1.0.0.tgz",
+      "integrity": "sha512-1WsPDsUSMmZH5LeMLegqkPDrsGgsWwk1Exipy2hvB0o/F0ASzbpIctSCcZIK1ykJvtTJULEH+20WOFjMvGnCTg==",
+      "dev": true,
+      "requires": {
+        "fromentries": "^1.2.0"
+      }
+    },
     "progress": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
@@ -2220,6 +2847,15 @@
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       "dev": true
     },
+    "release-zalgo": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/release-zalgo/-/release-zalgo-1.0.0.tgz",
+      "integrity": "sha1-CXALflB0Mpc5Mw5TXFqQ+2eFFzA=",
+      "dev": true,
+      "requires": {
+        "es6-error": "^4.0.1"
+      }
+    },
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -2380,6 +3016,31 @@
         "source-map": "^0.6.0"
       }
     },
+    "spawn-wrap": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-2.0.0.tgz",
+      "integrity": "sha512-EeajNjfN9zMnULLwhZZQU3GWBoFNkbngTUPfaawT4RkMiviTxcX0qfhVbGey39mfctfDHkWtuecgQ8NJcyQWHg==",
+      "dev": true,
+      "requires": {
+        "foreground-child": "^2.0.0",
+        "is-windows": "^1.0.2",
+        "make-dir": "^3.0.0",
+        "rimraf": "^3.0.0",
+        "signal-exit": "^3.0.2",
+        "which": "^2.0.1"
+      },
+      "dependencies": {
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "spdx-correct": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",
@@ -2540,6 +3201,17 @@
         }
       }
     },
+    "test-exclude": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+      "integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+      "dev": true,
+      "requires": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
+      }
+    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -2570,16 +3242,6 @@
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
-    "tiny-glob": {
-      "version": "0.2.6",
-      "resolved": "https://registry.npmjs.org/tiny-glob/-/tiny-glob-0.2.6.tgz",
-      "integrity": "sha512-A7ewMqPu1B5PWwC3m7KVgAu96Ch5LA0w4SnEN/LbDREj/gAD0nPWboRbn8YoP9ISZXqeNAlMvKSKoEuhcfK3Pw==",
-      "dev": true,
-      "requires": {
-        "globalyzer": "^0.1.0",
-        "globrex": "^0.1.1"
-      }
-    },
     "tmp": {
       "version": "0.0.33",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
@@ -2589,6 +3251,12 @@
         "os-tmpdir": "~1.0.2"
       }
     },
+    "to-fast-properties": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
+      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
+      "dev": true
+    },
     "to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -2619,26 +3287,6 @@
         }
       }
     },
-    "tsconfig-paths": {
-      "version": "3.9.0",
-      "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.9.0.tgz",
-      "integrity": "sha512-dRcuzokWhajtZWkQsDVKbWyY+jgcLC5sqJhg2PSgf4ZkH2aHPvaOY8YWGhmjb68b5qqTfasSsDO9k7RUiEmZAw==",
-      "dev": true,
-      "requires": {
-        "@types/json5": "^0.0.29",
-        "json5": "^1.0.1",
-        "minimist": "^1.2.0",
-        "strip-bom": "^3.0.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        }
-      }
-    },
     "tslib": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.11.1.tgz",
@@ -2675,6 +3323,15 @@
       "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
       "dev": true
     },
+    "typedarray-to-buffer": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+      "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+      "dev": true,
+      "requires": {
+        "is-typedarray": "^1.0.0"
+      }
+    },
     "typeorm": {
       "version": "0.2.24",
       "resolved": "https://registry.npmjs.org/typeorm/-/typeorm-0.2.24.tgz",
@@ -2713,6 +3370,12 @@
         "punycode": "^2.1.0"
       }
     },
+    "uuid": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+      "dev": true
+    },
     "v8-compile-cache": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
@@ -2845,6 +3508,18 @@
         "mkdirp": "^0.5.1"
       }
     },
+    "write-file-atomic": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
     "xml2js": {
       "version": "0.4.23",
       "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.23.tgz",
diff --git a/package.json b/package.json
index 894578a..9251048 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "Cursor-based pagination works with TypeORM.",
   "main": "lib/index.js",
   "scripts": {
-    "test": "mocha --require ts-node/register test/*.ts",
+    "test": "nyc mocha --require ts-node/register test/*.ts",
     "test:docker": "docker-compose up -d && npm run test && docker-compose down",
     "build": "rimraf lib && tsc",
     "prepublish": "npm run build"
@@ -25,14 +25,15 @@
   "devDependencies": {
     "@types/chai": "^4.2.9",
     "@types/mocha": "^7.0.1",
+    "@types/node": "^13.7.7",
     "@typescript-eslint/eslint-plugin": "^2.21.0",
     "@typescript-eslint/parser": "^2.21.0",
     "chai": "^4.2.0",
     "eslint": "^6.8.0",
     "eslint-config-airbnb-base": "^14.0.0",
-    "eslint-import-resolver-typescript": "^2.0.0",
     "eslint-plugin-import": "^2.20.1",
     "mocha": "^7.1.0",
+    "nyc": "^15.0.0",
     "pg": "^7.18.2",
     "rimraf": "^3.0.2",
     "ts-node": "^8.6.2",
diff --git a/src/Paginator.ts b/src/Paginator.ts
new file mode 100644
index 0000000..9f15300
--- /dev/null
+++ b/src/Paginator.ts
@@ -0,0 +1,199 @@
+import {
+  Brackets,
+  ObjectType,
+  OrderByCondition,
+  SelectQueryBuilder,
+  WhereExpression,
+} from 'typeorm';
+
+import {
+  atob,
+  btoa,
+  encodeByType,
+  decodeByType,
+  pascalToUnderscore,
+} from './utils';
+
+export type Order = 'ASC' | 'DESC';
+
+interface CursorParam {
+  [key: string]: any;
+}
+
+export interface Cursor {
+  beforeCursor: string | null;
+  afterCursor: string | null;
+}
+
+export default class Paginator<Entity> {
+  private afterCursor: string | null = null;
+
+  private beforeCursor: string | null = null;
+
+  private nextAfterCursor: string | null = null;
+
+  private nextBeforeCursor: string | null = null;
+
+  private alias: string = pascalToUnderscore(this.entity.name);
+
+  private limit = 10;
+
+  private order: Order = 'DESC';
+
+  public constructor(
+    private entity: ObjectType<Entity>,
+    private paginationKeys: Extract<keyof Entity, string>[],
+  ) { }
+
+  public setAlias(alias: string): void {
+    this.alias = alias;
+  }
+
+  public setAfterCursor(cursor: string): void {
+    this.afterCursor = cursor;
+  }
+
+  public setBeforeCursor(cursor: string): void {
+    this.beforeCursor = cursor;
+  }
+
+  public setLimit(limit: number): void {
+    this.limit = limit;
+  }
+
+  public setOrder(order: Order): void {
+    this.order = order;
+  }
+
+  public getCursor(): Cursor {
+    return {
+      afterCursor: this.nextAfterCursor,
+      beforeCursor: this.nextBeforeCursor,
+    };
+  }
+
+  public async paginate(builder: SelectQueryBuilder<Entity>): Promise<Entity[]> {
+    const entities = await this.appendPagingQuery(builder).getMany();
+    const hasMore = entities.length > this.limit;
+
+    if (hasMore) {
+      entities.splice(entities.length - 1, 1);
+    }
+
+    if (entities.length === 0) {
+      return entities;
+    }
+
+    if (!this.hasAfterCursor() && this.hasBeforeCursor()) {
+      entities.reverse();
+    }
+
+    if (this.hasBeforeCursor() || hasMore) {
+      this.nextAfterCursor = this.encode(entities[entities.length - 1]);
+    }
+
+    if (this.hasAfterCursor() || (hasMore && this.hasBeforeCursor())) {
+      this.nextBeforeCursor = this.encode(entities[0]);
+    }
+
+    return entities;
+  }
+
+  private appendPagingQuery(builder: SelectQueryBuilder<Entity>): SelectQueryBuilder<Entity> {
+    const cursors: CursorParam = {};
+
+    if (this.hasAfterCursor()) {
+      Object.assign(cursors, this.decode(this.afterCursor as string));
+    } else if (this.hasBeforeCursor()) {
+      Object.assign(cursors, this.decode(this.beforeCursor as string));
+    }
+
+    if (Object.keys(cursors).length > 0) {
+      builder.andWhere(new Brackets((where) => this.buildCursor(where, cursors)));
+    }
+
+    builder.take(this.limit + 1);
+    builder.orderBy(this.buildOrder());
+
+    return builder;
+  }
+
+  private buildCursor(where: WhereExpression, cursors: CursorParam): void {
+    const operator = this.getOperator();
+    const params: CursorParam = {};
+    let query = '';
+    this.paginationKeys.forEach((key) => {
+      params[key] = cursors[key];
+      where.orWhere(`${query}${this.alias}.${key} ${operator} :${key}`, params);
+      query = `${query}${this.alias}.${key} = :${key} AND `;
+    });
+  }
+
+  private getOperator(): string {
+    if (this.hasAfterCursor()) {
+      return this.order === 'ASC' ? '>' : '<';
+    }
+
+    if (this.hasBeforeCursor()) {
+      return this.order === 'ASC' ? '<' : '>';
+    }
+
+    return '=';
+  }
+
+  private buildOrder(): OrderByCondition {
+    let { order } = this;
+
+    if (!this.hasAfterCursor() && this.hasBeforeCursor()) {
+      order = this.flipOrder(order);
+    }
+
+    const orderByCondition: OrderByCondition = {};
+    this.paginationKeys.forEach((key) => {
+      orderByCondition[`${this.alias}.${key}`] = order;
+    });
+
+    return orderByCondition;
+  }
+
+  private hasAfterCursor(): boolean {
+    return this.afterCursor !== null;
+  }
+
+  private hasBeforeCursor(): boolean {
+    return this.beforeCursor !== null;
+  }
+
+  private encode(entity: Entity): string {
+    const payload = this.paginationKeys.map((key) => {
+      const type = this.getEntityPropertyType(key);
+      const value = encodeByType(type, entity[key]);
+      return `${key}:${value}`;
+    }).join(',');
+
+    return btoa(payload);
+  }
+
+  private decode(cursor: string): CursorParam {
+    const cursors: CursorParam = {};
+    const columns = atob(cursor).split(',');
+    columns.forEach((column) => {
+      const [key, raw] = column.split(':');
+      const type = this.getEntityPropertyType(key);
+      const value = decodeByType(type, raw);
+      cursors[key] = value;
+    });
+
+    return cursors;
+  }
+
+  private getEntityPropertyType(key: string): string {
+    return Reflect.getOwnMetadata('design:type', this.entity.prototype, key).name.toLowerCase();
+  }
+
+  private flipOrder(order: Order): Order {
+    return order === 'ASC'
+      ? 'DESC'
+      : 'ASC';
+  }
+}
diff --git a/src/index.ts b/src/index.ts
index e69de29..03fcde8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -0,0 +1,48 @@
+import { ObjectType } from 'typeorm';
+
+import Paginator, { Order } from './Paginator';
+
+export interface PagingQuery {
+  afterCursor?: string;
+  beforeCursor?: string;
+  limit?: number;
+  order?: Order;
+}
+
+export interface PagniationOtions<Entity> {
+  query: PagingQuery;
+  entity: ObjectType<Entity>;
+  alias?: string;
+  paginationKeys?: Extract<keyof Entity, string>[];
+}
+
+export function buildPaginator<Entity>(options: PagniationOtions<Entity>): Paginator<Entity> {
+  const {
+    query,
+    entity,
+    alias = entity.name.toLowerCase(),
+    paginationKeys = ['id' as any],
+  } = options;
+
+  const paginator = new Paginator(entity, paginationKeys);
+
+  paginator.setAlias(alias);
+
+  if (query.afterCursor) {
+    paginator.setAfterCursor(query.afterCursor);
+  }
+
+  if (query.beforeCursor) {
+    paginator.setBeforeCursor(query.beforeCursor);
+  }
+
+  if (query.limit) {
+    paginator.setLimit(query.limit);
+  }
+
+  if (query.order) {
+    paginator.setOrder(query.order);
+  }
+
+  return paginator;
+}
diff --git a/src/utils.ts b/src/utils.ts
new file mode 100644
index 0000000..6bfb08a
--- /dev/null
+++ b/src/utils.ts
@@ -0,0 +1,84 @@
+export function atob(value: string): string {
+  return Buffer.from(value, 'base64').toString();
+}
+
+export function btoa(value: string): string {
+  return Buffer.from(value).toString('base64');
+}
+
+export function encodeByType(type: string, value: any): string | null {
+  if (value === null) return null;
+
+  switch (type) {
+    case 'date': {
+      return (value as Date).getTime().toString();
+    }
+    case 'number': {
+      return (value as number).toString();
+    }
+    case 'string': {
+      return encodeURIComponent(value);
+    }
+    default: {
+      throw new Error(`unknown type in cursor: [${type}]${value}`);
+    }
+  }
+}
+
+export function decodeByType(type: string, value: string): string | number | Date {
+  switch (type) {
+    case 'date': {
+      const timestamp = parseInt(value, 10);
+
+      if (Number.isNaN(timestamp)) {
+        throw new Error('date column in cursor should be a valid timestamp');
+      }
+
+      return new Date(timestamp);
+    }
+
+    case 'number': {
+      const num = parseInt(value, 10);
+
+      if (Number.isNaN(num)) {
+        throw new Error('number column in cursor should be a valid number');
+      }
+
+      return num;
+    }
+
+    case 'string': {
+      return decodeURIComponent(value);
+    }
+
+    default: {
+      throw new Error(`unknown type in cursor: [${type}]${value}`);
+    }
+  }
+}
+
+export function stringToBool(value: string): boolean {
+  return value === 'true';
+}
+
+export function stringToNumber(value: string): number {
+  const result = parseInt(value, 10);
+
+  if (Number.isNaN(result)) {
+    return 0;
+  }
+
+  return result;
+}
+
+export function camelOrPascalToUnderscore(str: string): string {
+  return str.split(/(?=[A-Z])/).join('_').toLowerCase();
+}
+
+export function camelToUnderscore(str: string): string {
+  return camelOrPascalToUnderscore(str);
+}
+
+export function pascalToUnderscore(str: string): string {
+  return camelOrPascalToUnderscore(str);
+}
diff --git a/tsconfig.json b/tsconfig.json
index 0e6235c..17afd32 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,9 +6,12 @@
     "strict": true,
     "sourceMap": true,
     "esModuleInterop": true,
-    "declaration": true
+    "declaration": true,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true
   },
   "include": [
-    "./src/**/*"
+    "./src/**/*",
+    "./test/**/*"
   ]
 }
\ No newline at end of file