diff --git a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.dbg.json b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.dbg.json
index 86d5f44dff..92300ea683 100644
--- a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.dbg.json
+++ b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../../build-info/1f95016aa87f8376998977fedfcae017.json"
+  "buildInfo": "../../../../../build-info/0bafc698027e3d830c902762382d89e8.json"
 }
diff --git a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.json b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.json
index 8fd7d531d1..252c24da03 100644
--- a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.json
+++ b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/ERC20.sol/ERC20.json
@@ -290,8 +290,8 @@
       "type": "function"
     }
   ],
-  "bytecode": 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diff --git a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/IERC20.sol/IERC20.dbg.json b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/IERC20.sol/IERC20.dbg.json
index 86d5f44dff..92300ea683 100644
--- a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/IERC20.sol/IERC20.dbg.json
+++ b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/IERC20.sol/IERC20.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../../build-info/1f95016aa87f8376998977fedfcae017.json"
+  "buildInfo": "../../../../../build-info/0bafc698027e3d830c902762382d89e8.json"
 }
diff --git a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol/IERC20Metadata.dbg.json b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol/IERC20Metadata.dbg.json
index 5118accb6b..f281ec0eed 100644
--- a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol/IERC20Metadata.dbg.json
+++ b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol/IERC20Metadata.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../../../build-info/1f95016aa87f8376998977fedfcae017.json"
+  "buildInfo": "../../../../../../build-info/0bafc698027e3d830c902762382d89e8.json"
 }
diff --git a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/utils/Context.sol/Context.dbg.json b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/utils/Context.sol/Context.dbg.json
index 16b4690e2a..6d8ebf1b8c 100644
--- a/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/utils/Context.sol/Context.dbg.json
+++ b/contracts/basic-bandwidth-generation/artifacts/@openzeppelin/contracts/utils/Context.sol/Context.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/1f95016aa87f8376998977fedfcae017.json"
+  "buildInfo": "../../../../build-info/0bafc698027e3d830c902762382d89e8.json"
 }
diff --git a/contracts/basic-bandwidth-generation/cache/solidity-files-cache.json b/contracts/basic-bandwidth-generation/cache/solidity-files-cache.json
index e842d693af..e9c3820492 100644
--- a/contracts/basic-bandwidth-generation/cache/solidity-files-cache.json
+++ b/contracts/basic-bandwidth-generation/cache/solidity-files-cache.json
@@ -2,7 +2,7 @@
   "_format": "hh-sol-cache-2",
   "files": {
     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/contracts/BandwidthGenerator.sol": {
-      "lastModificationDate": 1643129770695,
+      "lastModificationDate": 1643627584891,
       "contentHash": "642b72e2d50d565db7bc994cace3f5a0",
       "sourceName": "contracts/BandwidthGenerator.sol",
       "solcConfig": {
@@ -41,7 +41,7 @@
       ]
     },
     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/contracts/CosmosToken.sol": {
-      "lastModificationDate": 1642773899716,
+      "lastModificationDate": 1643627584895,
       "contentHash": "fc5dd09fe73bc6cfece970f702a3aba1",
       "sourceName": "contracts/CosmosToken.sol",
       "solcConfig": {
@@ -77,7 +77,7 @@
       ]
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/contracts/Gravity.sol": {
-      "lastModificationDate": 1642773899716,
+      "lastModificationDate": 1643627584895,
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       "sourceName": "contracts/Gravity.sol",
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@@ -118,8 +118,8 @@
       ]
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/access/Ownable.sol": {
-      "lastModificationDate": 1641812554274,
-      "contentHash": "4fe56b59ced59d87df6b796758f62895",
+      "lastModificationDate": 1643896343014,
+      "contentHash": "8398972af73b4e9e5ff3b31cad86234f",
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@@ -154,8 +154,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/utils/math/SafeMath.sol": {
-      "lastModificationDate": 1641812554378,
-      "contentHash": "5365090efc586b728719e562ebfed0d6",
+      "lastModificationDate": 1643896343082,
+      "contentHash": "a6a9d6c1f662e922b82c1ba4d81cdd48",
       "sourceName": "@openzeppelin/contracts/utils/math/SafeMath.sol",
       "solcConfig": {
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@@ -188,8 +188,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol": {
-      "lastModificationDate": 1641812553614,
-      "contentHash": "2cd550cedf51b8d294607dad5023d717",
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       "sourceName": "@openzeppelin/contracts/token/ERC20/ERC20.sol",
       "solcConfig": {
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@@ -226,8 +226,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol": {
-      "lastModificationDate": 1641812554110,
-      "contentHash": "0eac3e1a83ee62326ca007811285b274",
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       "sourceName": "@openzeppelin/contracts/token/ERC20/IERC20.sol",
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@@ -260,8 +260,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
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-      "contentHash": "aa1be06992a99bb7393b26a6af3c4dfb",
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       "sourceName": "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol",
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@@ -296,8 +296,8 @@
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-      "lastModificationDate": 1641812553346,
-      "contentHash": "851485d5b925529b1a2f34a0be077891",
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@@ -330,8 +330,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
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-      "contentHash": "d37406082a74a9b6b114de522fcb6349",
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       "sourceName": "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol",
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@@ -367,8 +367,8 @@
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/security/ReentrancyGuard.sol": {
-      "lastModificationDate": 1641812554322,
-      "contentHash": "53fbff678f378956efcb207fa748eaa6",
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+      "contentHash": "92f9448b23a90ea3bb932ee55cc3ccce",
       "sourceName": "@openzeppelin/contracts/security/ReentrancyGuard.sol",
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@@ -401,8 +401,8 @@
       ]
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     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/utils/Address.sol": {
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-      "contentHash": "c5f6c4e4df069c789e7d84b4c3011913",
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       "sourceName": "@openzeppelin/contracts/utils/Address.sol",
       "solcConfig": {
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@@ -435,8 +435,8 @@
       ]
     },
     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/utils/cryptography/ECDSA.sol": {
-      "lastModificationDate": 1641812553414,
-      "contentHash": "197dbfaf7146845fa76331a4c9980e9f",
+      "lastModificationDate": 1643896342586,
+      "contentHash": "395edffd6bb2b3ba29970d5814039654",
       "sourceName": "@openzeppelin/contracts/utils/cryptography/ECDSA.sol",
       "solcConfig": {
         "version": "0.8.10",
@@ -460,7 +460,9 @@
           }
         }
       },
-      "imports": [],
+      "imports": [
+        "../Strings.sol"
+      ],
       "versionPragmas": [
         "^0.8.0"
       ],
@@ -469,7 +471,7 @@
       ]
     },
     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/contracts/test-contracts/TestCosmosToken.sol": {
-      "lastModificationDate": 1642773899716,
+      "lastModificationDate": 1643627584895,
       "contentHash": "957b6079ee0d5a6e048fce8555c14dee",
       "sourceName": "contracts/test-contracts/TestCosmosToken.sol",
       "solcConfig": {
@@ -505,7 +507,7 @@
       ]
     },
     "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/contracts/test-contracts/TestGravity.sol": {
-      "lastModificationDate": 1642773899716,
+      "lastModificationDate": 1643627584895,
       "contentHash": "f24299c3acb20aff23914e16b7ba95e1",
       "sourceName": "contracts/test-contracts/TestGravity.sol",
       "solcConfig": {
@@ -544,6 +546,40 @@
       "artifacts": [
         "TestGravity"
       ]
+    },
+    "/home/max/dev/nymtech/nym/contracts/basic-bandwidth-generation/node_modules/@openzeppelin/contracts/utils/Strings.sol": {
+      "lastModificationDate": 1643896343114,
+      "contentHash": "9c54c6c065d9e590fdcdd72c451425b9",
+      "sourceName": "@openzeppelin/contracts/utils/Strings.sol",
+      "solcConfig": {
+        "version": "0.8.10",
+        "settings": {
+          "optimizer": {
+            "enabled": true,
+            "runs": 200
+          },
+          "outputSelection": {
+            "*": {
+              "*": [
+                "abi",
+                "evm.bytecode",
+                "evm.deployedBytecode",
+                "evm.methodIdentifiers"
+              ],
+              "": [
+                "ast"
+              ]
+            }
+          }
+        }
+      },
+      "imports": [],
+      "versionPragmas": [
+        "^0.8.0"
+      ],
+      "artifacts": [
+        "Strings"
+      ]
     }
   }
 }
diff --git a/contracts/basic-bandwidth-generation/hardhat.config.js b/contracts/basic-bandwidth-generation/hardhat.config.js
index a11fc74668..d1dee8cf8d 100644
--- a/contracts/basic-bandwidth-generation/hardhat.config.js
+++ b/contracts/basic-bandwidth-generation/hardhat.config.js
@@ -2,6 +2,7 @@ require("@nomiclabs/hardhat-etherscan");
 require("@nomiclabs/hardhat-truffle5");
 require("@nomiclabs/hardhat-web3");
 require("@nomiclabs/hardhat-ethers");
+require("hardhat-gas-reporter");
 require('dotenv').config({ path: require('find-config')('.env') });
 
 /**
@@ -18,6 +19,11 @@ module.exports = {
   // paths: {
   //   artifacts: "./artifacts/contracts"
   // },
+  gasReporter: {
+    currency: 'EUR',
+    gasPrice: 21, 
+    token: 'GWEI'
+  },
   networks: {
    localhost: {
       url: "http://127.0.0.1:8545"
diff --git a/contracts/basic-bandwidth-generation/package-lock.json b/contracts/basic-bandwidth-generation/package-lock.json
index caa5fad537..dc874dd968 100644
--- a/contracts/basic-bandwidth-generation/package-lock.json
+++ b/contracts/basic-bandwidth-generation/package-lock.json
@@ -3438,6 +3438,24 @@
       "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.22.tgz",
       "integrity": "sha512-tFfcE+DSTzWAgifkjik9AySNqIyNoYwmR+uecPwwD/XRNfvOjmC/FjCxpiUGDkDVDphPfCUecSQVFw+lN3M3kQ=="
     },
+    "@types/concat-stream": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/@types/concat-stream/-/concat-stream-1.6.1.tgz",
+      "integrity": "sha512-eHE4cQPoj6ngxBZMvVf6Hw7Mh4jMW4U9lpGmS5GBPB9RYxlFg+CHaVN7ErNY4W9XfLIEn20b4VDYaIrbq0q4uA==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/form-data": {
+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/@types/form-data/-/form-data-0.0.33.tgz",
+      "integrity": "sha1-yayFsqX9GENbjIXZ7LUObWyJP/g=",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/glob": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.4.tgz",
@@ -3515,6 +3533,12 @@
       "integrity": "sha512-eI5Yrz3Qv4KPUa/nSIAi0h+qX0XyewOliug5F2QAtuRg6Kjg6jfmxe1GIwoIRhZspD1A0RP8ANrPwvEXXtRFog==",
       "dev": true
     },
+    "@types/qs": {
+      "version": "6.9.7",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.7.tgz",
+      "integrity": "sha512-FGa1F62FT09qcrueBA6qYTrJPVDzah9a+493+o2PCXsesWHIn27G98TsSMs3WPNbZIEj4+VJf6saSFpvD+3Zsw==",
+      "dev": true
+    },
     "@types/resolve": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/@types/resolve/-/resolve-0.0.8.tgz",
@@ -3817,6 +3841,12 @@
       "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
       "optional": true
     },
+    "asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY=",
+      "dev": true
+    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -4043,6 +4073,23 @@
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
       "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA=="
     },
+    "bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "bip66": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/bip66/-/bip66-1.1.5.tgz",
+      "integrity": "sha1-AfqHSHhcpwlV1QESF9GzE5lpyiI=",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
     "blakejs": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.1.tgz",
@@ -4475,6 +4522,12 @@
         "upper-case-first": "^1.1.0"
       }
     },
+    "charenc": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz",
+      "integrity": "sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc=",
+      "dev": true
+    },
     "check-error": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
@@ -4599,6 +4652,17 @@
         }
       }
     },
+    "cli-table3": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/cli-table3/-/cli-table3-0.5.1.tgz",
+      "integrity": "sha512-7Qg2Jrep1S/+Q3EceiZtQcDPWxhAvBw+ERf1162v4sikJrvojMHFqXt8QIVha8UlH9rgU0BeWPytZ9/TzYqlUw==",
+      "dev": true,
+      "requires": {
+        "colors": "^1.1.2",
+        "object-assign": "^4.1.0",
+        "string-width": "^2.1.1"
+      }
+    },
     "cliui": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
@@ -4721,6 +4785,50 @@
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
     },
+    "concat-stream": {
+      "version": "1.6.2",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
+      "integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^2.2.2",
+        "typedarray": "^0.0.6"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.7",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
+          "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        },
+        "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
+        },
+        "string_decoder": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.1.0"
+          }
+        }
+      }
+    },
     "console-browserify": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/console-browserify/-/console-browserify-1.2.0.tgz",
@@ -4876,6 +4984,12 @@
         }
       }
     },
+    "crypt": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz",
+      "integrity": "sha1-iNf/fsDfuG9xPch7u0LQRNPmxBs=",
+      "dev": true
+    },
     "crypto-addr-codec": {
       "version": "0.1.7",
       "resolved": "https://registry.npmjs.org/crypto-addr-codec/-/crypto-addr-codec-0.1.7.tgz",
@@ -5217,6 +5331,17 @@
       "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-10.0.0.tgz",
       "integrity": "sha512-rlBi9d8jpv9Sf1klPjNfFAuWDjKLwTIJJ/VxtoTwIR6hnZxcEOQCZg2oIL3MWBYw5GpUDKOEnND7LXTbIpQ03Q=="
     },
+    "drbg.js": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/drbg.js/-/drbg.js-1.0.1.tgz",
+      "integrity": "sha1-Pja2xCs3BDgjzbwzLVjzHiRFSAs=",
+      "dev": true,
+      "requires": {
+        "browserify-aes": "^1.0.6",
+        "create-hash": "^1.1.2",
+        "create-hmac": "^1.1.4"
+      }
+    },
     "duplexer3": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
@@ -5563,6 +5688,137 @@
         "js-sha3": "^0.5.7"
       }
     },
+    "eth-gas-reporter": {
+      "version": "0.2.24",
+      "resolved": "https://registry.npmjs.org/eth-gas-reporter/-/eth-gas-reporter-0.2.24.tgz",
+      "integrity": "sha512-RbXLC2bnuPHzIMU/rnLXXlb6oiHEEKu7rq2UrAX/0mfo0Lzrr/kb9QTjWjfz8eNvc+uu6J8AuBwI++b+MLNI2w==",
+      "dev": true,
+      "requires": {
+        "@ethersproject/abi": "^5.0.0-beta.146",
+        "@solidity-parser/parser": "^0.14.0",
+        "cli-table3": "^0.5.0",
+        "colors": "1.4.0",
+        "ethereumjs-util": "6.2.0",
+        "ethers": "^4.0.40",
+        "fs-readdir-recursive": "^1.1.0",
+        "lodash": "^4.17.14",
+        "markdown-table": "^1.1.3",
+        "mocha": "^7.1.1",
+        "req-cwd": "^2.0.0",
+        "request": "^2.88.0",
+        "request-promise-native": "^1.0.5",
+        "sha1": "^1.1.1",
+        "sync-request": "^6.0.0"
+      },
+      "dependencies": {
+        "@solidity-parser/parser": {
+          "version": "0.14.0",
+          "resolved": "https://registry.npmjs.org/@solidity-parser/parser/-/parser-0.14.0.tgz",
+          "integrity": "sha512-cX0JJRcmPtNUJpzD2K7FdA7qQsTOk1UZnFx2k7qAg9ZRvuaH5NBe5IEdBMXGlmf2+FmjhqbygJ26H8l2SV7aKQ==",
+          "dev": true,
+          "requires": {
+            "antlr4ts": "^0.5.0-alpha.4"
+          }
+        },
+        "@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==",
+          "dev": true,
+          "requires": {
+            "@types/node": "*"
+          }
+        },
+        "ethereumjs-util": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz",
+          "integrity": "sha512-vb0XN9J2QGdZGIEKG2vXM+kUdEivUfU6Wmi5y0cg+LRhDYKnXIZ/Lz7XjFbHRR9VIKq2lVGLzGBkA++y2nOdOQ==",
+          "dev": true,
+          "requires": {
+            "@types/bn.js": "^4.11.3",
+            "bn.js": "^4.11.0",
+            "create-hash": "^1.1.2",
+            "ethjs-util": "0.1.6",
+            "keccak": "^2.0.0",
+            "rlp": "^2.2.3",
+            "secp256k1": "^3.0.1"
+          }
+        },
+        "ethers": {
+          "version": "4.0.49",
+          "resolved": "https://registry.npmjs.org/ethers/-/ethers-4.0.49.tgz",
+          "integrity": "sha512-kPltTvWiyu+OktYy1IStSO16i2e7cS9D9OxZ81q2UUaiNPVrm/RTcbxamCXF9VUSKzJIdJV68EAIhTEVBalRWg==",
+          "dev": true,
+          "requires": {
+            "aes-js": "3.0.0",
+            "bn.js": "^4.11.9",
+            "elliptic": "6.5.4",
+            "hash.js": "1.1.3",
+            "js-sha3": "0.5.7",
+            "scrypt-js": "2.0.4",
+            "setimmediate": "1.0.4",
+            "uuid": "2.0.1",
+            "xmlhttprequest": "1.8.0"
+          }
+        },
+        "hash.js": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.1.3.tgz",
+          "integrity": "sha512-/UETyP0W22QILqS+6HowevwhEFJ3MBJnwTf75Qob9Wz9t0DPuisL8kW8YZMK62dHAKE1c1p+gY1TtOLY+USEHA==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "minimalistic-assert": "^1.0.0"
+          }
+        },
+        "keccak": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/keccak/-/keccak-2.1.0.tgz",
+          "integrity": "sha512-m1wbJRTo+gWbctZWay9i26v5fFnYkOn7D5PCxJ3fZUGUEb49dE1Pm4BREUYCt/aoO6di7jeoGmhvqN9Nzylm3Q==",
+          "dev": true,
+          "requires": {
+            "bindings": "^1.5.0",
+            "inherits": "^2.0.4",
+            "nan": "^2.14.0",
+            "safe-buffer": "^5.2.0"
+          }
+        },
+        "scrypt-js": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-2.0.4.tgz",
+          "integrity": "sha512-4KsaGcPnuhtCZQCxFxN3GVYIhKFPTdLd8PLC552XwbMndtD0cjRFAhDuuydXQ0h08ZfPgzqe6EKHozpuH74iDw==",
+          "dev": true
+        },
+        "secp256k1": {
+          "version": "3.8.0",
+          "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-3.8.0.tgz",
+          "integrity": "sha512-k5ke5avRZbtl9Tqx/SA7CbY3NF6Ro+Sj9cZxezFzuBlLDmyqPiL8hJJ+EmzD8Ig4LUDByHJ3/iPOVoRixs/hmw==",
+          "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": "^6.5.2",
+            "nan": "^2.14.0",
+            "safe-buffer": "^5.1.2"
+          }
+        },
+        "setimmediate": {
+          "version": "1.0.4",
+          "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.4.tgz",
+          "integrity": "sha1-IOgd5iLUoCWIzgyNqJc8vPHTE48=",
+          "dev": true
+        },
+        "uuid": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-2.0.1.tgz",
+          "integrity": "sha1-wqMN7bPlNdcsz4LjQ5QaULqFM6w=",
+          "dev": true
+        }
+      }
+    },
     "eth-lib": {
       "version": "0.2.8",
       "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.8.tgz",
@@ -6431,6 +6687,11 @@
         "utils-extend": "^1.0.4"
       }
     },
+    "file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw=="
+    },
     "fill-range": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
@@ -6608,6 +6869,12 @@
         "minipass": "^2.6.0"
       }
     },
+    "fs-readdir-recursive": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/fs-readdir-recursive/-/fs-readdir-recursive-1.1.0.tgz",
+      "integrity": "sha512-GNanXlVr2pf02+sPN40XN8HG+ePaNcvM0q5mZBd668Obwb0yD5GiUbZOFgwn8kGMY6I3mdyDJzieUy3PTYyTRA==",
+      "dev": true
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -16199,6 +16466,12 @@
         "has-symbols": "^1.0.1"
       }
     },
+    "get-port": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/get-port/-/get-port-3.2.0.tgz",
+      "integrity": "sha1-3Xzn3hh8Bsi/NTeWrHHgmfCYDrw=",
+      "dev": true
+    },
     "get-stream": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-4.1.0.tgz",
@@ -16417,6 +16690,17 @@
         "ws": "^7.4.6"
       }
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+    "hardhat-gas-reporter": {
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diff --git a/contracts/basic-bandwidth-generation/package.json b/contracts/basic-bandwidth-generation/package.json
index da712a61ad..a69070534e 100644
--- a/contracts/basic-bandwidth-generation/package.json
+++ b/contracts/basic-bandwidth-generation/package.json
@@ -7,6 +7,7 @@
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     "solidity-coverage": "^0.7.17"
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   "dependencies": {