diff --git a/hardhat.config.ts b/hardhat.config.ts
index 38b6e967..3f8812c8 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -9,6 +9,7 @@ import '@typechain/hardhat';
 import '@nomicfoundation/hardhat-chai-matchers';
 import '@nomiclabs/hardhat-ethers';
 import '@nomiclabs/hardhat-solhint';
+import '@nomicfoundation/hardhat-verify';
 import { extendEnvironment } from 'hardhat/config';
 import { lazyObject } from 'hardhat/plugins';
 import { HardhatRuntimeEnvironment } from 'hardhat/types';
@@ -23,7 +24,7 @@ import './tasks/send_otp';
 import './utils/type-extensions';
 import config from './hardhat.node.config';
 import { Helpers } from './utils/helpers';
-import { accounts, rpc } from './utils/network';
+import { accounts, etherscan_api_key, rpc } from './utils/network';
 
 extendEnvironment((hre: HardhatRuntimeEnvironment) => {
   hre.helpers = lazyObject(() => new Helpers(hre));
@@ -176,4 +177,53 @@ config.contractSizer = {
   except: [],
 };
 
+config.etherscan = {
+  customChains: [
+    {
+      network: 'chiado',
+      chainId: 10200,
+      urls: {
+        //Blockscout
+        apiURL: 'https://gnosis-chiado.blockscout.com/api',
+        browserURL: 'https://gnosis-chiado.blockscout.com',
+      },
+    },
+    {
+      network: 'gnosis',
+      chainId: 100,
+      urls: {
+        // Gnosisscan
+        apiURL: 'https://api.gnosisscan.io/api',
+        browserURL: 'https://gnosisscan.io/',
+        // Blockscout
+        //apiURL: "https://blockscout.com/xdai/mainnet/api",
+        //browserURL: "https://blockscout.com/xdai/mainnet",
+      },
+    },
+    {
+      network: 'base_sepolia',
+      chainId: 84532,
+      urls: {
+        apiURL: 'https://api-sepolia.basescan.org/api',
+        browserURL: 'https://sepolia.basescan.org/',
+      },
+    },
+    {
+      network: 'base',
+      chainId: 8453,
+      urls: {
+        apiURL: 'https://api.basescan.org/api',
+        browserURL: 'https://basescan.org/',
+      },
+    },
+  ],
+  apiKey: {
+    //blockscout explorer verification does not require keys
+    chiado: 'chiado',
+    gnosis: etherscan_api_key('gnosis_mainnet'),
+    base_sepolia: etherscan_api_key('base_sepolia'),
+    base: etherscan_api_key('base'),
+  },
+};
+
 export default config;
diff --git a/package-lock.json b/package-lock.json
index fac7876c..3ebdb453 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,6 +26,7 @@
         "@defi-wonderland/smock": "^2.3.5",
         "@nomicfoundation/hardhat-chai-matchers": "^1.0.5",
         "@nomicfoundation/hardhat-network-helpers": "^1.0.7",
+        "@nomicfoundation/hardhat-verify": "^2.0.8",
         "@nomiclabs/hardhat-solhint": "^3.0.0",
         "@openzeppelin/test-helpers": "^0.5.16",
         "@typechain/hardhat": "^6.1.5",
@@ -1431,6 +1432,258 @@
         "hardhat": "^2.9.5"
       }
     },
+    "node_modules/@nomicfoundation/hardhat-verify": {
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/hardhat-verify/-/hardhat-verify-2.0.8.tgz",
+      "integrity": "sha512-x/OYya7A2Kcz+3W/J78dyDHxr0ezU23DKTrRKfy5wDPCnePqnr79vm8EXqX3gYps6IjPBYyGPZ9K6E5BnrWx5Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@ethersproject/abi": "^5.1.2",
+        "@ethersproject/address": "^5.0.2",
+        "cbor": "^8.1.0",
+        "chalk": "^2.4.2",
+        "debug": "^4.1.1",
+        "lodash.clonedeep": "^4.5.0",
+        "semver": "^6.3.0",
+        "table": "^6.8.0",
+        "undici": "^5.14.0"
+      },
+      "peerDependencies": {
+        "hardhat": "^2.0.4"
+      }
+    },
+    "node_modules/@nomicfoundation/hardhat-verify/node_modules/ajv": {
+      "version": "8.16.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.16.0.tgz",
+      "integrity": "sha512-F0twR8U1ZU67JIEtekUcLkXkoO5mMMmgGD8sK/xUFzJ805jxHQl92hImFAqqXMyMYjSPOyUPAwHYhB72g5sTXw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.3",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
+        "uri-js": "^4.4.1"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/@nomicfoundation/hardhat-verify/node_modules/ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
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+      }
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+      "license": "MIT",
+      "dependencies": {
+        "nofilter": "^3.1.0"
+      },
+      "engines": {
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+      },
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+      "license": "MIT",
+      "dependencies": {
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+      "license": "MIT"
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+      "dependencies": {
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+      },
+      "engines": {
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+      "peerDependenciesMeta": {
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+          "optional": true
+        }
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+        "node": ">=10"
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+      }
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+      }
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@nomicfoundation/hardhat-verify/node_modules/table": {
+      "version": "6.8.2",
+      "resolved": "https://registry.npmjs.org/table/-/table-6.8.2.tgz",
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+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "ajv": "^8.0.1",
+        "lodash.truncate": "^4.4.2",
+        "slice-ansi": "^4.0.0",
+        "string-width": "^4.2.3",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/@nomicfoundation/solidity-analyzer": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/@nomicfoundation/solidity-analyzer/-/solidity-analyzer-0.1.0.tgz",
@@ -10506,6 +10759,13 @@
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       "dev": true
     },
+    "node_modules/lodash.clonedeep": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz",
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+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/lodash.flatten": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/lodash.flatten/-/lodash.flatten-4.4.0.tgz",
@@ -10530,6 +10790,13 @@
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       "dev": true
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+    "node_modules/lodash.truncate": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.truncate/-/lodash.truncate-4.4.2.tgz",
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+      "license": "MIT"
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     "node_modules/log-symbols": {
       "version": "4.1.0",
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@@ -17162,6 +17429,185 @@
         "ethereumjs-util": "^7.1.4"
       }
     },
+    "@nomicfoundation/hardhat-verify": {
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/hardhat-verify/-/hardhat-verify-2.0.8.tgz",
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+      "dev": true,
+      "requires": {
+        "@ethersproject/abi": "^5.1.2",
+        "@ethersproject/address": "^5.0.2",
+        "cbor": "^8.1.0",
+        "chalk": "^2.4.2",
+        "debug": "^4.1.1",
+        "lodash.clonedeep": "^4.5.0",
+        "semver": "^6.3.0",
+        "table": "^6.8.0",
+        "undici": "^5.14.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "8.16.0",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.16.0.tgz",
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+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.3",
+            "json-schema-traverse": "^1.0.0",
+            "require-from-string": "^2.0.2",
+            "uri-js": "^4.4.1"
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+        },
+        "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,
+          "requires": {
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+        "astral-regex": {
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+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
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+          "dev": true,
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+        "table": {
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+          "resolved": "https://registry.npmjs.org/table/-/table-6.8.2.tgz",
+          "integrity": "sha512-w2sfv80nrAh2VCbqR5AK27wswXhqcck2AhfnNW76beQXskGZ1V12GwS//yYVa3d3fcvAip2OUnbDAjW2k3v9fA==",
+          "dev": true,
+          "requires": {
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+            "lodash.truncate": "^4.4.2",
+            "slice-ansi": "^4.0.0",
+            "string-width": "^4.2.3",
+            "strip-ansi": "^6.0.1"
+          }
+        }
+      }
+    },
     "@nomicfoundation/solidity-analyzer": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/@nomicfoundation/solidity-analyzer/-/solidity-analyzer-0.1.0.tgz",
@@ -24065,6 +24511,12 @@
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       "dev": true
     },
+    "lodash.clonedeep": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz",
+      "integrity": "sha512-H5ZhCF25riFd9uB5UCkVKo61m3S/xZk1x4wA6yp/L3RFP6Z/eHH1ymQcGLo7J3GMPfm0V/7m1tryHuGVxpqEBQ==",
+      "dev": true
+    },
     "lodash.flatten": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/lodash.flatten/-/lodash.flatten-4.4.0.tgz",
@@ -24089,6 +24541,12 @@
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       "dev": true
     },
+    "lodash.truncate": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.truncate/-/lodash.truncate-4.4.2.tgz",
+      "integrity": "sha512-jttmRe7bRse52OsWIMDLaXxWqRAmtIUccAQ3garviCqJjafXOfNMO0yMfNpdD6zbGaTU0P5Nz7e7gAT6cKmJRw==",
+      "dev": true
+    },
     "log-symbols": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-4.1.0.tgz",
diff --git a/package.json b/package.json
index 4ad864c4..f4db66f3 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
     "@defi-wonderland/smock": "^2.3.5",
     "@nomicfoundation/hardhat-chai-matchers": "^1.0.5",
     "@nomicfoundation/hardhat-network-helpers": "^1.0.7",
+    "@nomicfoundation/hardhat-verify": "^2.0.8",
     "@nomiclabs/hardhat-solhint": "^3.0.0",
     "@openzeppelin/test-helpers": "^0.5.16",
     "@typechain/hardhat": "^6.1.5",
diff --git a/utils/network.ts b/utils/network.ts
index 2d6dac37..fd10ed78 100644
--- a/utils/network.ts
+++ b/utils/network.ts
@@ -55,3 +55,14 @@ export function accounts(networkName?: string): [string] | { mnemonic: string }
     return { mnemonic: mnemonic(networkName) };
   }
 }
+
+export function etherscan_api_key(networkName: string): string {
+  if (networkName) {
+    const api_key = process.env['ETHERSCAN_API_KEY_' + networkName.toUpperCase()];
+    if (api_key && api_key !== '') {
+      return api_key;
+    }
+  }
+
+  return '';
+}