diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 502e0cf..c24e71f 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -26,6 +26,7 @@ jobs:
         run: |
           touch env
           echo WALLET_CONNECT_PROJECT_ID=${{secrets.WALLET_CONNECT_PROJECT_ID}} >> env
+          echo PRIVATE_KEY=${{secrets.PRIVATE_KEY}} >> env
 
       - name: Show version
         working-directory: flutter_bird_app
diff --git a/README.md b/README.md
index 4b5470b..a81b392 100644
--- a/README.md
+++ b/README.md
@@ -197,6 +197,71 @@ Summary
 > Final cost:          0.118115450004724618 ETH
 ```
 
+### Generate and Mint full onchain bird
+- You can generate random bird images using a script.
+- Using the deployed contract, you can base64 encode the generated bird image and set it as the tokenURI to mint it as a full onchain NFT.
+
+- Create bird
+  - You can start the server to get or generate images.
+  - If the target tokenId exists, it will be retrieved; if not, it will be generated.
+```
+% cd flutter_bird_image_server
+% npm run start
+% curl -o image.png http://localhost:3000/image/:tokenId
+```
+
+- Mint full onchain bird
+  - We recommend minting from Flutter Birds, but you can also mint it manually.
+  - The generated image is used to mint NFTs.
+  - Please run it in the environment where you deployed the contract.
+  - Please change the filePath of toenInfo in `mint_random_skin.js` as appropriate.
+  - Please execute the following in your docker environment.
+
+```
+# node scripts/mint_full_onchain_bird/mint_random_skin.js
+Minting a random Flutter Bird Skin on contract: 0xBa29cfe58943Ee7830663C31029ef73f65B1D470
+data:application/json,{"name":"Flutter Bird - 358","description":"NFT Flutter Bird","attributes":[{"trait_type":"File size","value":"17,510 bytes"}],"image":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAu4AAALuCAYAAADxHZPKAAAABmJLR0QA/wD/AP+gvaeTAAAgAElEQVR4nO3dW4xsWXkf8G/VnDMzppuLLWMD4WI5sjkTkBwFCytyZJLYGWGEIkRAAhmJEGEpD4mSOHFirOAHiPEFIhNFQnF4QLIQ..."}
+chunk count: 1
+appendUri tx: [object Object]
+Minting successful
+Token ID of new Skin: 358
+0xbfd1a547a6dc6d332e5dc23530992c550719c8db3e39ef3454d8cb24c05617be
+```
+
+- Transfer nft
+ - transfer_nft.js `recipientAddress` `tokenId`
+
+```
+# node scripts/transfer_nft.js 0xde7c30d8548b1b38856aa3ae2bf02c536ab60f1e 66
+Sender address: 0x492ca3c9594B17b65494F910A9a33Fa66f3141ed
+Recipient address: 0xde7c30d8548b1b38856aa3ae2bf02c536ab60f1e
+Token ID: 66
+NFT (Token ID: 66) successfully transferred
+Transaction Hash: 0x5a2c95a0a19e7621f21f058fcc712d92a0850ea5cc0983444d3904c1d72b5025
+```
+
+- Check the minted NFT using truffle.
+  - Please execute the following in your docker environment.
+  - You can open the NFT image by pasting `data:image/png;base64, xxxxxxx` from the image field of the uri into the search box of your browser.
+```
+// If you are deploying to the testnet, set the network to baobab.
+# truffle console --network baobab
+truffle(baobab)> let instance = await FlutterBirdSkins.deployed()
+undefined
+truffle(baobab)> ownerAddress="0x244d85991c825ad2672111ed73e089fbd39e357d"
+'0x244d85991c825ad2672111ed73e089fbd39e357d'
+truffle(baobab)> let tokens = await instance.getTokensForOwner(ownerAddress)
+undefined
+truffle(baobab)> console.log(tokens.map(token => token.toString()))
+[ '358' ]
+truffle(baobab)> let uri = await instance.tokenURI(358)
+undefined
+truffle(baobab)> console.log(uri)
+data:application/json,{"name":"Flutter Bird - 358","description":"NFT Flutter Bird","attributes":[{"trait_type":"File size","value":"10,029 bytes"}],"image":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAu4AAALuCAYAAADxHZPKAAAABmJLR0QA/wD/AP+gvaeTAAAgAElEQVR4nO3dW4xsWXkf8G/VnDMzppuLLWMD4WI5sjkTkBwFCytyZJLYGWGEIkRAAhmJEGEpD4mSOHFirOAHiPEFIhNFQnF4QLIQ..."}
+```
+
+
+
 ## Access via LINE
 The LINE Messenger API allows us to receive URLs via LINE.
 
diff --git a/flutter_bird_app/assets/FlutterBirdSkins.json b/flutter_bird_app/assets/FlutterBirdSkins.json
new file mode 100644
index 0000000..021f855
--- /dev/null
+++ b/flutter_bird_app/assets/FlutterBirdSkins.json
@@ -0,0 +1,24963 @@
+{
+  "contractName": "FlutterBirdSkins",
+  "abi": [
+    {
+      "inputs": [],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_size",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_start",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_end",
+          "type": "uint256"
+        }
+      ],
+      "name": "InvalidCodeAtRange",
+      "type": "error"
+    },
+    {
+      "inputs": [],
+      "name": "TokenDoesNotExist",
+      "type": "error"
+    },
+    {
+      "inputs": [],
+      "name": "WriteError",
+      "type": "error"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "approved",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "operator",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "bool",
+          "name": "approved",
+          "type": "bool"
+        }
+      ],
+      "name": "ApprovalForAll",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "previousOwner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "newOwner",
+          "type": "address"
+        }
+      ],
+      "name": "OwnershipTransferred",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "SkinMinted",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "getApproved",
+      "outputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "operator",
+          "type": "address"
+        }
+      ],
+      "name": "isApprovedForAll",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "owner",
+      "outputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "ownerOf",
+      "outputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "renounceOwnership",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "safeTransferFrom",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "bytes",
+          "name": "data",
+          "type": "bytes"
+        }
+      ],
+      "name": "safeTransferFrom",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "operator",
+          "type": "address"
+        },
+        {
+          "internalType": "bool",
+          "name": "approved",
+          "type": "bool"
+        }
+      ],
+      "name": "setApprovalForAll",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes4",
+          "name": "interfaceId",
+          "type": "bytes4"
+        }
+      ],
+      "name": "supportsInterface",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "index",
+          "type": "uint256"
+        }
+      ],
+      "name": "tokenByIndex",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "index",
+          "type": "uint256"
+        }
+      ],
+      "name": "tokenOfOwnerByIndex",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "newOwner",
+          "type": "address"
+        }
+      ],
+      "name": "transferOwnership",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "newTokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "mintSkin",
+      "outputs": [],
+      "stateMutability": "payable",
+      "type": "function",
+      "payable": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_owner",
+          "type": "address"
+        }
+      ],
+      "name": "getTokensForOwner",
+      "outputs": [
+        {
+          "internalType": "uint256[]",
+          "name": "",
+          "type": "uint256[]"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "getMintedTokenList",
+      "outputs": [
+        {
+          "internalType": "bool[]",
+          "name": "",
+          "type": "bool[]"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "values",
+          "type": "bytes[]"
+        }
+      ],
+      "name": "appendUri",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "tokenId",
+          "type": "uint256"
+        }
+      ],
+      "name": "tokenURI",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    }
+  ],
+  "metadata": "{\"compiler\":{\"version\":\"0.8.14+commit.80d49f37\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_size\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_start\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_end\",\"type\":\"uint256\"}],\"name\":\"InvalidCodeAtRange\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"TokenDoesNotExist\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"WriteError\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"ApprovalForAll\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"SkinMinted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes[]\",\"name\":\"values\",\"type\":\"bytes[]\"}],\"name\":\"appendUri\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getMintedTokenList\",\"outputs\":[{\"internalType\":\"bool[]\",\"name\":\"\",\"type\":\"bool[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"getTokensForOwner\",\"outputs\":[{\"internalType\":\"uint256[]\",\"name\":\"\",\"type\":\"uint256[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"newTokenId\",\"type\":\"uint256\"}],\"name\":\"mintSkin\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenOfOwnerByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"See {IERC721-approve}.\"},\"balanceOf(address)\":{\"details\":\"See {IERC721-balanceOf}.\"},\"getApproved(uint256)\":{\"details\":\"See {IERC721-getApproved}.\"},\"isApprovedForAll(address,address)\":{\"details\":\"See {IERC721-isApprovedForAll}.\"},\"name()\":{\"details\":\"See {IERC721Metadata-name}.\"},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"ownerOf(uint256)\":{\"details\":\"See {IERC721-ownerOf}.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.\"},\"safeTransferFrom(address,address,uint256)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"safeTransferFrom(address,address,uint256,bytes)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"setApprovalForAll(address,bool)\":{\"details\":\"See {IERC721-setApprovalForAll}.\"},\"supportsInterface(bytes4)\":{\"details\":\"See {IERC165-supportsInterface}.\"},\"symbol()\":{\"details\":\"See {IERC721Metadata-symbol}.\"},\"tokenByIndex(uint256)\":{\"details\":\"See {IERC721Enumerable-tokenByIndex}.\"},\"tokenOfOwnerByIndex(address,uint256)\":{\"details\":\"See {IERC721Enumerable-tokenOfOwnerByIndex}.\"},\"tokenURI(uint256)\":{\"details\":\"See {IERC721Metadata-tokenURI}.\"},\"totalSupply()\":{\"details\":\"See {IERC721Enumerable-totalSupply}.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC721-transferFrom}.\"},\"transferOwnership(address)\":{\"details\":\"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"getMintedTokenList()\":{\"notice\":\"returns a list of boolean values indicating whether the skin with that index has been minted already.\"},\"getTokensForOwner(address)\":{\"notice\":\"returns a list of tokenIds that are owned by the given address\"}},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/contracts/FlutterBirdSkins.sol\":\"FlutterBirdSkins\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/access/Ownable.sol\":{\"keccak256\":\"0xba43b97fba0d32eb4254f6a5a297b39a19a247082a02d6e69349e071e2946218\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fc980984badf3984b6303b377711220e067722bbd6a135b24669ff5069ef9f32\",\"dweb:/ipfs/QmPHXMSXj99XjSVM21YsY6aNtLLjLVXDbyN76J5HQYvvrz\"]},\"@openzeppelin/contracts/token/ERC721/ERC721.sol\":{\"keccak256\":\"0x2c309e7df9e05e6ce15bedfe74f3c61b467fc37e0fae9eab496acf5ea0bbd7ff\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://7063b5c98711a98018ba4635ac74cee1c1cfa2ea01099498e062699ed9530005\",\"dweb:/ipfs/QmeJ8rGXkcv7RrqLdAW8PCXPAykxVsddfYY6g5NaTwmRFE\"]},\"@openzeppelin/contracts/token/ERC721/IERC721.sol\":{\"keccak256\":\"0x5bce51e11f7d194b79ea59fe00c9e8de9fa2c5530124960f29a24d4c740a3266\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://7e66dfde185df46104c11bc89d08fa0760737aa59a2b8546a656473d810a8ea4\",\"dweb:/ipfs/QmXvyqtXPaPss2PD7eqPoSao5Szm2n6UMoiG8TZZDjmChR\"]},\"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\":{\"keccak256\":\"0xa82b58eca1ee256be466e536706850163d2ec7821945abd6b4778cfb3bee37da\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6e75cf83beb757b8855791088546b8337e9d4684e169400c20d44a515353b708\",\"dweb:/ipfs/QmYvPafLfoquiDMEj7CKHtvbgHu7TJNPSVPSCjrtjV8HjV\"]},\"@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol\":{\"keccak256\":\"0xa8796bd16014cefb8c26449413981a49c510f92a98d6828494f5fd046223ced3\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://63a5e0bb5a7d182e0d0eef87033f78115eab791de3626a929bc98c157087880a\",\"dweb:/ipfs/QmetkXAu2CJKS4qrZtEQPU8okAPwUwa6HL4XYwk8vrYMk8\"]},\"@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol\":{\"keccak256\":\"0xd1556954440b31c97a142c6ba07d5cade45f96fafd52091d33a14ebe365aecbf\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://26fef835622b46a5ba08b3ef6b46a22e94b5f285d0f0fb66b703bd30217d2c34\",\"dweb:/ipfs/QmZ548qdwfL1qF7aXz3xh1GCdTiST81kGGuKRqVUfYmPZR\"]},\"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol\":{\"keccak256\":\"0x75b829ff2f26c14355d1cba20e16fe7b29ca58eb5fef665ede48bc0f9c6c74b9\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://a0a107160525724f9e1bbbab031defc2f298296dd9e331f16a6f7130cec32146\",\"dweb:/ipfs/QmemujxSd7gX8A9M8UwmNbz4Ms3U9FG9QfudUgxwvTmPWf\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0x006dd67219697fe68d7fbfdea512e7c4cb64a43565ed86171d67e844982da6fa\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://2455248c8ddd9cc6a7af76a13973cddf222072427e7b0e2a7d1aff345145e931\",\"dweb:/ipfs/QmfYjnjRbWqYpuxurqveE6HtzsY1Xx323J428AKQgtBJZm\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xa92e4fa126feb6907daa0513ddd816b2eb91f30a808de54f63c17d0e162c3439\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://a367861093b74443b137564d3f3c472f70bcf114739e62059c939f25e315706c\",\"dweb:/ipfs/Qmd7JMpcxD9RuQjK3uM3EzJUgSqdN8vzp8eytEiuwxQJ6h\"]},\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0x3088eb2868e8d13d89d16670b5f8612c4ab9ff8956272837d8e90106c59c14a0\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b81d9ff6559ea5c47fc573e17ece6d9ba5d6839e213e6ebc3b4c5c8fe4199d7f\",\"dweb:/ipfs/QmPCW1bFisUzJkyjroY3yipwfism9RRCigCcK1hbXtVM8n\"]},\"@openzeppelin/contracts/utils/introspection/ERC165.sol\":{\"keccak256\":\"0xd10975de010d89fd1c78dc5e8a9a7e7f496198085c151648f20cba166b32582b\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fb0048dee081f6fffa5f74afc3fb328483c2a30504e94a0ddd2a5114d731ec4d\",\"dweb:/ipfs/QmZptt1nmYoA5SgjwnSgWqgUSDgm4q52Yos3xhnMv3MV43\"]},\"@openzeppelin/contracts/utils/introspection/IERC165.sol\":{\"keccak256\":\"0x447a5f3ddc18419d41ff92b3773fb86471b1db25773e07f877f548918a185bf1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://be161e54f24e5c6fae81a12db1a8ae87bc5ae1b0ddc805d82a1440a68455088f\",\"dweb:/ipfs/QmP7C3CHdY9urF4dEMb9wmsp1wMxHF6nhA2yQE5SKiPAdy\"]},\"@openzeppelin/contracts/utils/math/Math.sol\":{\"keccak256\":\"0xe4455ac1eb7fc497bb7402579e7b4d64d928b846fce7d2b6fde06d366f21c2b3\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://cc8841b3cd48ad125e2f46323c8bad3aa0e88e399ec62acb9e57efa7e7c8058c\",\"dweb:/ipfs/QmSqE4mXHA2BXW58deDbXE8MTcsL5JSKNDbm23sVQxRLPS\"]},\"@openzeppelin/contracts/utils/math/SignedMath.sol\":{\"keccak256\":\"0xf92515413956f529d95977adc9b0567d583c6203fc31ab1c23824c35187e3ddc\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://c50fcc459e49a9858b6d8ad5f911295cb7c9ab57567845a250bf0153f84a95c7\",\"dweb:/ipfs/QmcEW85JRzvDkQggxiBBLVAasXWdkhEysqypj9EaB6H2g6\"]},\"project:/contracts/FlutterBirdSkins.sol\":{\"keccak256\":\"0xec6cd844584bcbe9779792ee789ecc42745d68e928b29ef04f1e0ce26cde3950\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://ea7859c522bb485aea5adc21a3cbac3dfe445c1da718d706732bb12f8258702e\",\"dweb:/ipfs/QmQ36H429SaDrp76XhAL8MftKtw1kb6N5xeUU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+      "contents": "{\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function cleanup_t_bytes4(value) -> cleaned {\n        cleaned := and(value, 0xffffffff00000000000000000000000000000000000000000000000000000000)\n    }\n\n    function validator_revert_t_bytes4(value) {\n        if iszero(eq(value, cleanup_t_bytes4(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_bytes4(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_bytes4(value)\n    }\n\n    function abi_decode_tuple_t_bytes4(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_bytes4(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_bool_to_t_bool_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_length_t_string_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_string_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function array_length_t_array$_t_uint256_$dyn_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_array$_t_uint256_$dyn_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function array_dataslot_t_array$_t_uint256_$dyn_memory_ptr(ptr) -> data {\n        data := ptr\n\n        data := add(ptr, 0x20)\n\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function abi_encode_t_uint256_to_t_uint256(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encodeUpdatedPos_t_uint256_to_t_uint256(value0, pos) -> updatedPos {\n        abi_encode_t_uint256_to_t_uint256(value0, pos)\n        updatedPos := add(pos, 0x20)\n    }\n\n    function array_nextElement_t_array$_t_uint256_$dyn_memory_ptr(ptr) -> next {\n        next := add(ptr, 0x20)\n    }\n\n    // uint256[] -> uint256[]\n    function abi_encode_t_array$_t_uint256_$dyn_memory_ptr_to_t_array$_t_uint256_$dyn_memory_ptr_fromStack(value, pos)  -> end  {\n        let length := array_length_t_array$_t_uint256_$dyn_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_array$_t_uint256_$dyn_memory_ptr_fromStack(pos, length)\n        let baseRef := array_dataslot_t_array$_t_uint256_$dyn_memory_ptr(value)\n        let srcPtr := baseRef\n        for { let i := 0 } lt(i, length) { i := add(i, 1) }\n        {\n            let elementValue0 := mload(srcPtr)\n            pos := abi_encodeUpdatedPos_t_uint256_to_t_uint256(elementValue0, pos)\n            srcPtr := array_nextElement_t_array$_t_uint256_$dyn_memory_ptr(srcPtr)\n        }\n        end := pos\n    }\n\n    function abi_encode_tuple_t_array$_t_uint256_$dyn_memory_ptr__to_t_array$_t_uint256_$dyn_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_array$_t_uint256_$dyn_memory_ptr_to_t_array$_t_uint256_$dyn_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_uint256(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n        mstore(pos, cleanup_t_address(value))\n    }\n\n    function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_length_t_array$_t_bool_$dyn_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_array$_t_bool_$dyn_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function array_dataslot_t_array$_t_bool_$dyn_memory_ptr(ptr) -> data {\n        data := ptr\n\n        data := add(ptr, 0x20)\n\n    }\n\n    function abi_encode_t_bool_to_t_bool(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encodeUpdatedPos_t_bool_to_t_bool(value0, pos) -> updatedPos {\n        abi_encode_t_bool_to_t_bool(value0, pos)\n        updatedPos := add(pos, 0x20)\n    }\n\n    function array_nextElement_t_array$_t_bool_$dyn_memory_ptr(ptr) -> next {\n        next := add(ptr, 0x20)\n    }\n\n    // bool[] -> bool[]\n    function abi_encode_t_array$_t_bool_$dyn_memory_ptr_to_t_array$_t_bool_$dyn_memory_ptr_fromStack(value, pos)  -> end  {\n        let length := array_length_t_array$_t_bool_$dyn_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_array$_t_bool_$dyn_memory_ptr_fromStack(pos, length)\n        let baseRef := array_dataslot_t_array$_t_bool_$dyn_memory_ptr(value)\n        let srcPtr := baseRef\n        for { let i := 0 } lt(i, length) { i := add(i, 1) }\n        {\n            let elementValue0 := mload(srcPtr)\n            pos := abi_encodeUpdatedPos_t_bool_to_t_bool(elementValue0, pos)\n            srcPtr := array_nextElement_t_array$_t_bool_$dyn_memory_ptr(srcPtr)\n        }\n        end := pos\n    }\n\n    function abi_encode_tuple_t_array$_t_bool_$dyn_memory_ptr__to_t_array$_t_bool_$dyn_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_array$_t_bool_$dyn_memory_ptr_to_t_array$_t_bool_$dyn_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n    function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2 {\n        if slt(sub(dataEnd, headStart), 96) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 64\n\n            value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() {\n        revert(0, 0)\n    }\n\n    function revert_error_15abf5612cd996bc235ba1e55a4a30ac60e6bb601ff7ba4ad3f179b6be8d0490() {\n        revert(0, 0)\n    }\n\n    function revert_error_81385d8c0b31fffe14be1da910c8bd3a80be4cfa248e04f42ec0faea3132a8ef() {\n        revert(0, 0)\n    }\n\n    // bytes[]\n    function abi_decode_t_array$_t_bytes_calldata_ptr_$dyn_calldata_ptr(offset, end) -> arrayPos, length {\n        if iszero(slt(add(offset, 0x1f), end)) { revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() }\n        length := calldataload(offset)\n        if gt(length, 0xffffffffffffffff) { revert_error_15abf5612cd996bc235ba1e55a4a30ac60e6bb601ff7ba4ad3f179b6be8d0490() }\n        arrayPos := add(offset, 0x20)\n        if gt(add(arrayPos, mul(length, 0x20)), end) { revert_error_81385d8c0b31fffe14be1da910c8bd3a80be4cfa248e04f42ec0faea3132a8ef() }\n    }\n\n    function abi_decode_tuple_t_uint256t_array$_t_bytes_calldata_ptr_$dyn_calldata_ptr(headStart, dataEnd) -> value0, value1, value2 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := calldataload(add(headStart, 32))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value1, value2 := abi_decode_t_array$_t_bytes_calldata_ptr_$dyn_calldata_ptr(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function validator_revert_t_bool(value) {\n        if iszero(eq(value, cleanup_t_bool(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_bool(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_bool(value)\n    }\n\n    function abi_decode_tuple_t_addresst_bool(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_bool(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function revert_error_987264b3b1d58a9c7f8255e93e81c77d86d6299019c33110a076957a3e06e2ae() {\n        revert(0, 0)\n    }\n\n    function panic_error_0x41() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x41)\n        revert(0, 0x24)\n    }\n\n    function finalize_allocation(memPtr, size) {\n        let newFreePtr := add(memPtr, round_up_to_mul_of_32(size))\n        // protect against overflow\n        if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n        mstore(64, newFreePtr)\n    }\n\n    function allocate_memory(size) -> memPtr {\n        memPtr := allocate_unbounded()\n        finalize_allocation(memPtr, size)\n    }\n\n    function array_allocation_size_t_bytes_memory_ptr(length) -> size {\n        // Make sure we can allocate memory without overflow\n        if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n        size := round_up_to_mul_of_32(length)\n\n        // add length slot\n        size := add(size, 0x20)\n\n    }\n\n    function copy_calldata_to_memory(src, dst, length) {\n        calldatacopy(dst, src, length)\n        // clear end\n        mstore(add(dst, length), 0)\n    }\n\n    function abi_decode_available_length_t_bytes_memory_ptr(src, length, end) -> array {\n        array := allocate_memory(array_allocation_size_t_bytes_memory_ptr(length))\n        mstore(array, length)\n        let dst := add(array, 0x20)\n        if gt(add(src, length), end) { revert_error_987264b3b1d58a9c7f8255e93e81c77d86d6299019c33110a076957a3e06e2ae() }\n        copy_calldata_to_memory(src, dst, length)\n    }\n\n    // bytes\n    function abi_decode_t_bytes_memory_ptr(offset, end) -> array {\n        if iszero(slt(add(offset, 0x1f), end)) { revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() }\n        let length := calldataload(offset)\n        array := abi_decode_available_length_t_bytes_memory_ptr(add(offset, 0x20), length, end)\n    }\n\n    function abi_decode_tuple_t_addresst_addresst_uint256t_bytes_memory_ptr(headStart, dataEnd) -> value0, value1, value2, value3 {\n        if slt(sub(dataEnd, headStart), 128) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 64\n\n            value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := calldataload(add(headStart, 96))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value3 := abi_decode_t_bytes_memory_ptr(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function panic_error_0x22() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x22)\n        revert(0, 0x24)\n    }\n\n    function extract_byte_array_length(data) -> length {\n        length := div(data, 2)\n        let outOfPlaceEncoding := and(data, 1)\n        if iszero(outOfPlaceEncoding) {\n            length := and(length, 0x7f)\n        }\n\n        if eq(outOfPlaceEncoding, lt(length, 32)) {\n            panic_error_0x22()\n        }\n    }\n\n    function panic_error_0x32() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x32)\n        revert(0, 0x24)\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function increment_t_uint256(value) -> ret {\n        value := cleanup_t_uint256(value)\n        if eq(value, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) { panic_error_0x11() }\n        ret := add(value, 1)\n    }\n\n    function store_literal_in_memory_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: approval to current owne\")\n\n        mstore(add(memPtr, 32), \"r\")\n\n    }\n\n    function abi_encode_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 33)\n        store_literal_in_memory_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_c6e14a63ffb144eeef7cce6988e5dce07c60a7e0a7b1ef25dbe18c61483e0a83(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: approve caller is not to\")\n\n        mstore(add(memPtr, 32), \"ken owner or approved for all\")\n\n    }\n\n    function abi_encode_t_stringliteral_c6e14a63ffb144eeef7cce6988e5dce07c60a7e0a7b1ef25dbe18c61483e0a83_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 61)\n        store_literal_in_memory_c6e14a63ffb144eeef7cce6988e5dce07c60a7e0a7b1ef25dbe18c61483e0a83(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_c6e14a63ffb144eeef7cce6988e5dce07c60a7e0a7b1ef25dbe18c61483e0a83__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_c6e14a63ffb144eeef7cce6988e5dce07c60a7e0a7b1ef25dbe18c61483e0a83_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_12a8e5623d251e191fe4a291d9a59bcc01a4db7a1f5c20fc8de44358c18308af(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: caller is not token owne\")\n\n        mstore(add(memPtr, 32), \"r or approved\")\n\n    }\n\n    function abi_encode_t_stringliteral_12a8e5623d251e191fe4a291d9a59bcc01a4db7a1f5c20fc8de44358c18308af_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 45)\n        store_literal_in_memory_12a8e5623d251e191fe4a291d9a59bcc01a4db7a1f5c20fc8de44358c18308af(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_12a8e5623d251e191fe4a291d9a59bcc01a4db7a1f5c20fc8de44358c18308af__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_12a8e5623d251e191fe4a291d9a59bcc01a4db7a1f5c20fc8de44358c18308af_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function revert_error_356d538aaf70fba12156cc466564b792649f8f3befb07b071c91142253e175ad() {\n        revert(0, 0)\n    }\n\n    function revert_error_1e55d03107e9c4f1b5e21c76a16fba166a461117ab153bcce65e6a4ea8e5fc8a() {\n        revert(0, 0)\n    }\n\n    function revert_error_977805620ff29572292dee35f70b0f3f3f73d3fdd0e9f4d7a901c2e43ab18a2e() {\n        revert(0, 0)\n    }\n\n    function access_calldata_tail_t_bytes_calldata_ptr(base_ref, ptr_to_tail) -> addr, length {\n        let rel_offset_of_tail := calldataload(ptr_to_tail)\n        if iszero(slt(rel_offset_of_tail, sub(sub(calldatasize(), base_ref), sub(0x20, 1)))) { revert_error_356d538aaf70fba12156cc466564b792649f8f3befb07b071c91142253e175ad() }\n        addr := add(base_ref, rel_offset_of_tail)\n\n        length := calldataload(addr)\n        if gt(length, 0xffffffffffffffff) { revert_error_1e55d03107e9c4f1b5e21c76a16fba166a461117ab153bcce65e6a4ea8e5fc8a() }\n        addr := add(addr, 32)\n        if sgt(addr, sub(calldatasize(), mul(length, 0x01))) { revert_error_977805620ff29572292dee35f70b0f3f3f73d3fdd0e9f4d7a901c2e43ab18a2e() }\n\n    }\n\n    function checked_add_t_uint256(x, y) -> sum {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x > (maxValue - y)\n        if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n        sum := add(x, y)\n    }\n\n    function store_literal_in_memory_1d7f5dcf03a65f41ee49b0ab593e3851cfbe3fd7da53b6cf4eddd83c7df5734c(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721Enumerable: owner index ou\")\n\n        mstore(add(memPtr, 32), \"t of bounds\")\n\n    }\n\n    function abi_encode_t_stringliteral_1d7f5dcf03a65f41ee49b0ab593e3851cfbe3fd7da53b6cf4eddd83c7df5734c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 43)\n        store_literal_in_memory_1d7f5dcf03a65f41ee49b0ab593e3851cfbe3fd7da53b6cf4eddd83c7df5734c(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_1d7f5dcf03a65f41ee49b0ab593e3851cfbe3fd7da53b6cf4eddd83c7df5734c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_1d7f5dcf03a65f41ee49b0ab593e3851cfbe3fd7da53b6cf4eddd83c7df5734c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_d269a4e9f5820dcdb69ea21f528512eb9b927c8d846d48aa51c9219f461d4dcc(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721Enumerable: global index o\")\n\n        mstore(add(memPtr, 32), \"ut of bounds\")\n\n    }\n\n    function abi_encode_t_stringliteral_d269a4e9f5820dcdb69ea21f528512eb9b927c8d846d48aa51c9219f461d4dcc_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 44)\n        store_literal_in_memory_d269a4e9f5820dcdb69ea21f528512eb9b927c8d846d48aa51c9219f461d4dcc(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_d269a4e9f5820dcdb69ea21f528512eb9b927c8d846d48aa51c9219f461d4dcc__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_d269a4e9f5820dcdb69ea21f528512eb9b927c8d846d48aa51c9219f461d4dcc_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_b08d2b0fec7cc108ab049809a8beb42779d969a49299d0c317c907d9db22974f(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: invalid token ID\")\n\n    }\n\n    function abi_encode_t_stringliteral_b08d2b0fec7cc108ab049809a8beb42779d969a49299d0c317c907d9db22974f_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 24)\n        store_literal_in_memory_b08d2b0fec7cc108ab049809a8beb42779d969a49299d0c317c907d9db22974f(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_b08d2b0fec7cc108ab049809a8beb42779d969a49299d0c317c907d9db22974f__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_b08d2b0fec7cc108ab049809a8beb42779d969a49299d0c317c907d9db22974f_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_6d05c90094f31cfeb8f0eb86f0a513af3f7f8992991fbde41b08aa7960677159(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: address zero is not a va\")\n\n        mstore(add(memPtr, 32), \"lid owner\")\n\n    }\n\n    function abi_encode_t_stringliteral_6d05c90094f31cfeb8f0eb86f0a513af3f7f8992991fbde41b08aa7960677159_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 41)\n        store_literal_in_memory_6d05c90094f31cfeb8f0eb86f0a513af3f7f8992991fbde41b08aa7960677159(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_6d05c90094f31cfeb8f0eb86f0a513af3f7f8992991fbde41b08aa7960677159__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_6d05c90094f31cfeb8f0eb86f0a513af3f7f8992991fbde41b08aa7960677159_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_a694c7d0af81c0139c2d9cf9013fb42115382a7b8abc6fa7e09c0326c0773524(memPtr) {\n\n        mstore(add(memPtr, 0), \"invalid tokenId. must be #999\")\n\n    }\n\n    function abi_encode_t_stringliteral_a694c7d0af81c0139c2d9cf9013fb42115382a7b8abc6fa7e09c0326c0773524_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 29)\n        store_literal_in_memory_a694c7d0af81c0139c2d9cf9013fb42115382a7b8abc6fa7e09c0326c0773524(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_a694c7d0af81c0139c2d9cf9013fb42115382a7b8abc6fa7e09c0326c0773524__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_a694c7d0af81c0139c2d9cf9013fb42115382a7b8abc6fa7e09c0326c0773524_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_c6bc4f5b747fbbc581777f92b42c6eac56dbbb4e624c68b8c1a6001ff2001fc5(memPtr) {\n\n        mstore(add(memPtr, 0), \"insufficient funds\")\n\n    }\n\n    function abi_encode_t_stringliteral_c6bc4f5b747fbbc581777f92b42c6eac56dbbb4e624c68b8c1a6001ff2001fc5_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 18)\n        store_literal_in_memory_c6bc4f5b747fbbc581777f92b42c6eac56dbbb4e624c68b8c1a6001ff2001fc5(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_c6bc4f5b747fbbc581777f92b42c6eac56dbbb4e624c68b8c1a6001ff2001fc5__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_c6bc4f5b747fbbc581777f92b42c6eac56dbbb4e624c68b8c1a6001ff2001fc5_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: new owner is the zero a\")\n\n        mstore(add(memPtr, 32), \"ddress\")\n\n    }\n\n    function abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: transfer from incorrect \")\n\n        mstore(add(memPtr, 32), \"owner\")\n\n    }\n\n    function abi_encode_t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n        store_literal_in_memory_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: transfer to the zero add\")\n\n        mstore(add(memPtr, 32), \"ress\")\n\n    }\n\n    function abi_encode_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n        store_literal_in_memory_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: caller is not the owner\")\n\n    }\n\n    function abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n        updated_pos := pos\n    }\n\n    function store_literal_in_memory_bc36789e7a1e281436464229828f817d6612f7b477d66591ff96a9e064bcc98a(memPtr) {\n\n        mstore(add(memPtr, 0), 0x0000000000000000000000000000000000000000000000000000000000000000)\n\n    }\n\n    function abi_encode_t_stringliteral_bc36789e7a1e281436464229828f817d6612f7b477d66591ff96a9e064bcc98a_to_t_string_memory_ptr_nonPadded_inplace_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, 1)\n        store_literal_in_memory_bc36789e7a1e281436464229828f817d6612f7b477d66591ff96a9e064bcc98a(pos)\n        end := add(pos, 1)\n    }\n\n    function array_length_t_bytes_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n        updated_pos := pos\n    }\n\n    function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value, pos) -> end {\n        let length := array_length_t_bytes_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, length)\n    }\n\n    function abi_encode_tuple_packed_t_stringliteral_bc36789e7a1e281436464229828f817d6612f7b477d66591ff96a9e064bcc98a_t_bytes_memory_ptr__to_t_string_memory_ptr_t_bytes_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value0) -> end {\n\n        pos := abi_encode_t_stringliteral_bc36789e7a1e281436464229828f817d6612f7b477d66591ff96a9e064bcc98a_to_t_string_memory_ptr_nonPadded_inplace_fromStack( pos)\n\n        pos := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value0,  pos)\n\n        end := pos\n    }\n\n    function store_literal_in_memory_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: approve to caller\")\n\n    }\n\n    function abi_encode_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 25)\n        store_literal_in_memory_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: transfer to non ERC721Re\")\n\n        mstore(add(memPtr, 32), \"ceiver implementer\")\n\n    }\n\n    function abi_encode_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 50)\n        store_literal_in_memory_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function checked_sub_t_uint256(x, y) -> diff {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        if lt(x, y) { panic_error_0x11() }\n\n        diff := sub(x, y)\n    }\n\n    function shift_right_1_unsigned(value) -> newValue {\n        newValue :=\n\n        shr(1, value)\n\n    }\n\n    function checked_exp_helper(_power, _base, exponent, max) -> power, base {\n        power := _power\n        base  := _base\n        for { } gt(exponent, 1) {}\n        {\n            // overflow check for base * base\n            if gt(base, div(max, base)) { panic_error_0x11() }\n            if and(exponent, 1)\n            {\n                // No checks for power := mul(power, base) needed, because the check\n                // for base * base above is sufficient, since:\n                // |power| <= base (proof by induction) and thus:\n                // |power * base| <= base * base <= max <= |min| (for signed)\n                // (this is equally true for signed and unsigned exp)\n                power := mul(power, base)\n            }\n            base := mul(base, base)\n            exponent := shift_right_1_unsigned(exponent)\n        }\n    }\n\n    function checked_exp_unsigned(base, exponent, max) -> power {\n        // This function currently cannot be inlined because of the\n        // \"leave\" statements. We have to improve the optimizer.\n\n        // Note that 0**0 == 1\n        if iszero(exponent) { power := 1 leave }\n        if iszero(base) { power := 0 leave }\n\n        // Specializations for small bases\n        switch base\n        // 0 is handled above\n        case 1 { power := 1 leave }\n        case 2\n        {\n            if gt(exponent, 255) { panic_error_0x11() }\n            power := exp(2, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n        if or(\n            and(lt(base, 11), lt(exponent, 78)),\n            and(lt(base, 307), lt(exponent, 32))\n        )\n        {\n            power := exp(base, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n\n        power, base := checked_exp_helper(1, base, exponent, max)\n\n        if gt(power, div(max, base)) { panic_error_0x11() }\n        power := mul(power, base)\n    }\n\n    function checked_exp_t_uint256_t_uint256(base, exponent) -> power {\n        base := cleanup_t_uint256(base)\n        exponent := cleanup_t_uint256(exponent)\n\n        power := checked_exp_unsigned(base, exponent, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)\n\n    }\n\n    function store_literal_in_memory_da49291af84b6a1e37ed9eacd9a67360593e4a0e561cb261a6a738f621783314(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721Enumerable: consecutive tr\")\n\n        mstore(add(memPtr, 32), \"ansfers not supported\")\n\n    }\n\n    function abi_encode_t_stringliteral_da49291af84b6a1e37ed9eacd9a67360593e4a0e561cb261a6a738f621783314_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 53)\n        store_literal_in_memory_da49291af84b6a1e37ed9eacd9a67360593e4a0e561cb261a6a738f621783314(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_da49291af84b6a1e37ed9eacd9a67360593e4a0e561cb261a6a738f621783314__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_da49291af84b6a1e37ed9eacd9a67360593e4a0e561cb261a6a738f621783314_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_0b42b6393c1f53060fe3ddbfcd7aadcca894465a5a438f69c87d790b2299b9b2(memPtr) {\n\n        mstore(add(memPtr, 0), \"c\")\n\n    }\n\n    function abi_encode_t_stringliteral_0b42b6393c1f53060fe3ddbfcd7aadcca894465a5a438f69c87d790b2299b9b2_to_t_string_memory_ptr_nonPadded_inplace_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, 1)\n        store_literal_in_memory_0b42b6393c1f53060fe3ddbfcd7aadcca894465a5a438f69c87d790b2299b9b2(pos)\n        end := add(pos, 1)\n    }\n\n    function cleanup_t_uint32(value) -> cleaned {\n        cleaned := and(value, 0xffffffff)\n    }\n\n    function shift_left_224(value) -> newValue {\n        newValue :=\n\n        shl(224, value)\n\n    }\n\n    function leftAlign_t_uint32(value) -> aligned {\n        aligned := shift_left_224(value)\n    }\n\n    function abi_encode_t_uint32_to_t_uint32_nonPadded_inplace_fromStack(value, pos) {\n        mstore(pos, leftAlign_t_uint32(cleanup_t_uint32(value)))\n    }\n\n    function store_literal_in_memory_e60bf27c198d7ff49e9b26b4f7eb58903fb9b75165f2451681c67000b3f2895e(memPtr) {\n\n        mstore(add(memPtr, 0), 0x80600e6000396000f30000000000000000000000000000000000000000000000)\n\n    }\n\n    function abi_encode_t_stringliteral_e60bf27c198d7ff49e9b26b4f7eb58903fb9b75165f2451681c67000b3f2895e_to_t_string_memory_ptr_nonPadded_inplace_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, 9)\n        store_literal_in_memory_e60bf27c198d7ff49e9b26b4f7eb58903fb9b75165f2451681c67000b3f2895e(pos)\n        end := add(pos, 9)\n    }\n\n    function abi_encode_tuple_packed_t_stringliteral_0b42b6393c1f53060fe3ddbfcd7aadcca894465a5a438f69c87d790b2299b9b2_t_uint32_t_stringliteral_e60bf27c198d7ff49e9b26b4f7eb58903fb9b75165f2451681c67000b3f2895e_t_bytes_memory_ptr__to_t_string_memory_ptr_t_uint32_t_string_memory_ptr_t_bytes_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value1, value0) -> end {\n\n        pos := abi_encode_t_stringliteral_0b42b6393c1f53060fe3ddbfcd7aadcca894465a5a438f69c87d790b2299b9b2_to_t_string_memory_ptr_nonPadded_inplace_fromStack( pos)\n\n        abi_encode_t_uint32_to_t_uint32_nonPadded_inplace_fromStack(value0,  pos)\n        pos := add(pos, 4)\n\n        pos := abi_encode_t_stringliteral_e60bf27c198d7ff49e9b26b4f7eb58903fb9b75165f2451681c67000b3f2895e_to_t_string_memory_ptr_nonPadded_inplace_fromStack( pos)\n\n        pos := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value1,  pos)\n\n        end := pos\n    }\n\n    function array_storeLengthForEncoding_t_bytes_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_bytes_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_bytes_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_tuple_t_address_t_address_t_uint256_t_bytes_memory_ptr__to_t_address_t_address_t_uint256_t_bytes_memory_ptr__fromStack_reversed(headStart , value3, value2, value1, value0) -> tail {\n        tail := add(headStart, 128)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n        mstore(add(headStart, 96), sub(tail, headStart))\n        tail := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_fromStack(value3,  tail)\n\n    }\n\n    function abi_decode_t_bytes4_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_bytes4(value)\n    }\n\n    function abi_decode_tuple_t_bytes4_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_bytes4_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_encode_tuple_t_uint256_t_uint256_t_uint256__to_t_uint256_t_uint256_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n        tail := add(headStart, 96)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n    }\n\n    function panic_error_0x31() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x31)\n        revert(0, 0x24)\n    }\n\n    function store_literal_in_memory_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: mint to the zero address\")\n\n    }\n\n    function abi_encode_t_stringliteral_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC721: token already minted\")\n\n    }\n\n    function abi_encode_t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 28)\n        store_literal_in_memory_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n}\n",
+      "id": 19,
+      "language": "Yul",
+      "name": "#utility.yul"
+    }
+  ],
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+  "source": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"./lib/sstore2/SSTORE2.sol\";\nimport \"./lib/Memory.sol\";\n\nstruct Token {\n    uint256 bytesLength;\n    address[] addresses;\n}\n\ncontract FlutterBirdSkins is ERC721Enumerable, Ownable {\n    using Strings for uint256;\n\n    uint256 private _maxSupply = 1000;\n    uint256 private _mintPrice = 0.01 ether;\n\n    mapping(uint256 => Token) private tokens;\n\n    constructor() ERC721(\"FlutterBirdSkins\", \"FBS\") {}\n\n    event SkinMinted(uint256 indexed tokenId);\n\n    error TokenDoesNotExist();\n\n    function mintSkin(uint256 newTokenId) public payable {\n        require(newTokenId < _maxSupply, \"invalid tokenId. must be #999\");\n        require(msg.value >= _mintPrice, \"insufficient funds\");\n\n        _safeMint(msg.sender, newTokenId);\n\n        emit SkinMinted(newTokenId);\n    }\n\n    /**\n     * @notice returns a list of tokenIds that are owned by the given address\n   */\n    function getTokensForOwner(address _owner) public view returns (uint[] memory) {\n        uint[] memory _tokensOfOwner = new uint[](ERC721.balanceOf(_owner));\n        uint i;\n\n        for (i = 0; i < ERC721.balanceOf(_owner); i++) {\n            _tokensOfOwner[i] = ERC721Enumerable.tokenOfOwnerByIndex(_owner, i);\n        }\n        return (_tokensOfOwner);\n    }\n\n    /**\n     * @notice returns a list of boolean values indicating whether the skin with that index has been minted already.\n   */\n    function getMintedTokenList() public view returns (bool[] memory) {\n        bool[] memory _unmintedTokes = new bool[](_maxSupply);\n        uint i;\n\n        for (i = 0; i < _maxSupply; i++) {\n            if (_exists(i)) {\n                _unmintedTokes[i] = true;\n            }\n        }\n        return _unmintedTokes;\n    }\n\n    function appendUri(uint256 tokenId, bytes[] calldata values) public onlyOwner {\n        for (uint256 i = 0; i < values.length; i++) {\n            tokens[tokenId].addresses.push(SSTORE2.write(values[i]));\n            tokens[tokenId].bytesLength += values[i].length;\n        }\n    }\n\n    function tokenURI(uint256 tokenId) public view override returns (string memory) {\n        if (!_exists(tokenId)) revert TokenDoesNotExist();\n        bytes memory uri = new bytes(tokens[tokenId].bytesLength);\n        (uint256 uriAddr, ) = Memory.fromBytes(uri);\n        for (uint256 i = 0; i < tokens[tokenId].addresses.length; i++) {\n            bytes memory data = SSTORE2.read(tokens[tokenId].addresses[i]);\n            (uint256 dataAddr, uint256 dataLen) = Memory.fromBytes(data);\n            Memory.copy(dataAddr, uriAddr, dataLen);\n            uriAddr += dataLen;\n        }\n        return string(uri);\n    }\n\n    // function setTokenUri(uint256 tokenId, string memory _tokenURI) public {\n    //     require(\n    //         _isApprovedOrOwner(_msgSender(), tokenId),\n    //         \"ERC721: transfer caller is not owner nor approved\"\n    //     );\n    //     _setTokenURI(tokenId, _tokenURI);\n    // }\n\n    // function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {\n    //     require(_exists(tokenId), \"ERC721URIStorage: URI set of nonexistent token\");\n    //     _tokenURIs[tokenId] = _tokenURI;\n    // }\n}\n",
+  "sourcePath": "/app/flutter_bird_skins/contracts/FlutterBirdSkins.sol",
+  "ast": {
+    "absolutePath": "project:/contracts/FlutterBirdSkins.sol",
+    "exportedSymbols": {
+      "Address": [
+        1915
+      ],
+      "Bytecode": [
+        3893
+      ],
+      "Context": [
+        1945
+      ],
+      "ERC165": [
+        2198
+      ],
+      "ERC721": [
+        1039
+      ],
+      "ERC721Enumerable": [
+        1527
+      ],
+      "FlutterBirdSkins": [
+        3494
+      ],
+      "IERC165": [
+        2210
+      ],
+      "IERC721": [
+        1155
+      ],
+      "IERC721Enumerable": [
+        1558
+      ],
+      "IERC721Metadata": [
+        1585
+      ],
+      "IERC721Receiver": [
+        1173
+      ],
+      "Math": [
+        3076
+      ],
+      "Memory": [
+        3781
+      ],
+      "Ownable": [
+        112
+      ],
+      "SSTORE2": [
+        3999
+      ],
+      "SignedMath": [
+        3181
+      ],
+      "Strings": [
+        2174
+      ],
+      "Token": [
+        3193
+      ]
+    },
+    "id": 3495,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 3183,
+        "literals": [
+          "solidity",
+          "^",
+          "0.8",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "32:23:14"
+      },
+      {
+        "absolutePath": "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol",
+        "file": "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol",
+        "id": 3184,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 3495,
+        "sourceUnit": 1528,
+        "src": "57:78:14",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "absolutePath": "@openzeppelin/contracts/access/Ownable.sol",
+        "file": "@openzeppelin/contracts/access/Ownable.sol",
+        "id": 3185,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 3495,
+        "sourceUnit": 113,
+        "src": "136:52:14",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "absolutePath": "project:/contracts/lib/sstore2/SSTORE2.sol",
+        "file": "./lib/sstore2/SSTORE2.sol",
+        "id": 3186,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 3495,
+        "sourceUnit": 4000,
+        "src": "189:35:14",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "absolutePath": "project:/contracts/lib/Memory.sol",
+        "file": "./lib/Memory.sol",
+        "id": 3187,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 3495,
+        "sourceUnit": 3782,
+        "src": "225:26:14",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "canonicalName": "Token",
+        "id": 3193,
+        "members": [
+          {
+            "constant": false,
+            "id": 3189,
+            "mutability": "mutable",
+            "name": "bytesLength",
+            "nameLocation": "280:11:14",
+            "nodeType": "VariableDeclaration",
+            "scope": 3193,
+            "src": "272:19:14",
+            "stateVariable": false,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_uint256",
+              "typeString": "uint256"
+            },
+            "typeName": {
+              "id": 3188,
+              "name": "uint256",
+              "nodeType": "ElementaryTypeName",
+              "src": "272:7:14",
+              "typeDescriptions": {
+                "typeIdentifier": "t_uint256",
+                "typeString": "uint256"
+              }
+            },
+            "visibility": "internal"
+          },
+          {
+            "constant": false,
+            "id": 3192,
+            "mutability": "mutable",
+            "name": "addresses",
+            "nameLocation": "307:9:14",
+            "nodeType": "VariableDeclaration",
+            "scope": 3193,
+            "src": "297:19:14",
+            "stateVariable": false,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_array$_t_address_$dyn_storage_ptr",
+              "typeString": "address[]"
+            },
+            "typeName": {
+              "baseType": {
+                "id": 3190,
+                "name": "address",
+                "nodeType": "ElementaryTypeName",
+                "src": "297:7:14",
+                "stateMutability": "nonpayable",
+                "typeDescriptions": {
+                  "typeIdentifier": "t_address",
+                  "typeString": "address"
+                }
+              },
+              "id": 3191,
+              "nodeType": "ArrayTypeName",
+              "src": "297:9:14",
+              "typeDescriptions": {
+                "typeIdentifier": "t_array$_t_address_$dyn_storage_ptr",
+                "typeString": "address[]"
+              }
+            },
+            "visibility": "internal"
+          }
+        ],
+        "name": "Token",
+        "nameLocation": "260:5:14",
+        "nodeType": "StructDefinition",
+        "scope": 3495,
+        "src": "253:66:14",
+        "visibility": "public"
+      },
+      {
+        "abstract": false,
+        "baseContracts": [
+          {
+            "baseName": {
+              "id": 3194,
+              "name": "ERC721Enumerable",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 1527,
+              "src": "350:16:14"
+            },
+            "id": 3195,
+            "nodeType": "InheritanceSpecifier",
+            "src": "350:16:14"
+          },
+          {
+            "baseName": {
+              "id": 3196,
+              "name": "Ownable",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 112,
+              "src": "368:7:14"
+            },
+            "id": 3197,
+            "nodeType": "InheritanceSpecifier",
+            "src": "368:7:14"
+          }
+        ],
+        "canonicalName": "FlutterBirdSkins",
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "fullyImplemented": true,
+        "id": 3494,
+        "linearizedBaseContracts": [
+          3494,
+          112,
+          1527,
+          1558,
+          1039,
+          1585,
+          1155,
+          2198,
+          2210,
+          1945
+        ],
+        "name": "FlutterBirdSkins",
+        "nameLocation": "330:16:14",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "global": false,
+            "id": 3200,
+            "libraryName": {
+              "id": 3198,
+              "name": "Strings",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 2174,
+              "src": "388:7:14"
+            },
+            "nodeType": "UsingForDirective",
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+        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "owner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "approved",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "uint256",
+              "name": "tokenId",
+              "type": "uint256"
+            }
+          ],
+          "name": "Approval",
+          "type": "event"
+        },
+        "0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "owner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "operator",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "bool",
+              "name": "approved",
+              "type": "bool"
+            }
+          ],
+          "name": "ApprovalForAll",
+          "type": "event"
+        },
+        "0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "previousOwner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "newOwner",
+              "type": "address"
+            }
+          ],
+          "name": "OwnershipTransferred",
+          "type": "event"
+        },
+        "0xf8a1d8b71931385fc2643b62738ac48b2b5dfed67d40bebe158bca04f9995e95": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "uint256",
+              "name": "tokenId",
+              "type": "uint256"
+            }
+          ],
+          "name": "SkinMinted",
+          "type": "event"
+        },
+        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "uint256",
+              "name": "tokenId",
+              "type": "uint256"
+            }
+          ],
+          "name": "Transfer",
+          "type": "event"
+        }
+      },
+      "links": {},
+      "address": "0xa5A0f85CE806205436618BcfD382BA45c8B9C476",
+      "transactionHash": "0x3b52a52af00fa48207edcc034b62e514b57115e61de92541d6cc3039a771bd03"
+    }
+  },
+  "schemaVersion": "3.4.16",
+  "updatedAt": "2024-07-19T02:04:43.792Z",
+  "networkType": "ethereum",
+  "devdoc": {
+    "kind": "dev",
+    "methods": {
+      "approve(address,uint256)": {
+        "details": "See {IERC721-approve}."
+      },
+      "balanceOf(address)": {
+        "details": "See {IERC721-balanceOf}."
+      },
+      "getApproved(uint256)": {
+        "details": "See {IERC721-getApproved}."
+      },
+      "isApprovedForAll(address,address)": {
+        "details": "See {IERC721-isApprovedForAll}."
+      },
+      "name()": {
+        "details": "See {IERC721Metadata-name}."
+      },
+      "owner()": {
+        "details": "Returns the address of the current owner."
+      },
+      "ownerOf(uint256)": {
+        "details": "See {IERC721-ownerOf}."
+      },
+      "renounceOwnership()": {
+        "details": "Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner."
+      },
+      "safeTransferFrom(address,address,uint256)": {
+        "details": "See {IERC721-safeTransferFrom}."
+      },
+      "safeTransferFrom(address,address,uint256,bytes)": {
+        "details": "See {IERC721-safeTransferFrom}."
+      },
+      "setApprovalForAll(address,bool)": {
+        "details": "See {IERC721-setApprovalForAll}."
+      },
+      "supportsInterface(bytes4)": {
+        "details": "See {IERC165-supportsInterface}."
+      },
+      "symbol()": {
+        "details": "See {IERC721Metadata-symbol}."
+      },
+      "tokenByIndex(uint256)": {
+        "details": "See {IERC721Enumerable-tokenByIndex}."
+      },
+      "tokenOfOwnerByIndex(address,uint256)": {
+        "details": "See {IERC721Enumerable-tokenOfOwnerByIndex}."
+      },
+      "tokenURI(uint256)": {
+        "details": "See {IERC721Metadata-tokenURI}."
+      },
+      "totalSupply()": {
+        "details": "See {IERC721Enumerable-totalSupply}."
+      },
+      "transferFrom(address,address,uint256)": {
+        "details": "See {IERC721-transferFrom}."
+      },
+      "transferOwnership(address)": {
+        "details": "Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner."
+      }
+    },
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {
+      "getMintedTokenList()": {
+        "notice": "returns a list of boolean values indicating whether the skin with that index has been minted already."
+      },
+      "getTokensForOwner(address)": {
+        "notice": "returns a list of tokenIds that are owned by the given address"
+      }
+    },
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/flutter_bird_app/assets/flutterbirds.abi.json b/flutter_bird_app/assets/flutterbirds.abi.json
deleted file mode 100644
index 48ee820..0000000
--- a/flutter_bird_app/assets/flutterbirds.abi.json
+++ /dev/null
@@ -1,497 +0,0 @@
-[
-  {
-    "inputs": [],
-    "stateMutability": "nonpayable",
-    "type": "constructor"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "approved",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "Approval",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "internalType": "bool",
-        "name": "approved",
-        "type": "bool"
-      }
-    ],
-    "name": "ApprovalForAll",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "SkinMinted",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "Transfer",
-    "type": "event"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "approve",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      }
-    ],
-    "name": "balanceOf",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "getApproved",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      }
-    ],
-    "name": "isApprovedForAll",
-    "outputs": [
-      {
-        "internalType": "bool",
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [],
-    "name": "name",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [],
-    "name": "owner",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "ownerOf",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "safeTransferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      },
-      {
-        "internalType": "bytes",
-        "name": "data",
-        "type": "bytes"
-      }
-    ],
-    "name": "safeTransferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      },
-      {
-        "internalType": "bool",
-        "name": "approved",
-        "type": "bool"
-      }
-    ],
-    "name": "setApprovalForAll",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "bytes4",
-        "name": "interfaceId",
-        "type": "bytes4"
-      }
-    ],
-    "name": "supportsInterface",
-    "outputs": [
-      {
-        "internalType": "bool",
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [],
-    "name": "symbol",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "index",
-        "type": "uint256"
-      }
-    ],
-    "name": "tokenByIndex",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "index",
-        "type": "uint256"
-      }
-    ],
-    "name": "tokenOfOwnerByIndex",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [],
-    "name": "totalSupply",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "transferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "newTokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "mintSkin",
-    "outputs": [],
-    "stateMutability": "payable",
-    "type": "function",
-    "payable": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "_owner",
-        "type": "address"
-      }
-    ],
-    "name": "getTokensForOwner",
-    "outputs": [
-      {
-        "internalType": "uint256[]",
-        "name": "",
-        "type": "uint256[]"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [],
-    "name": "getMintedTokenList",
-    "outputs": [
-      {
-        "internalType": "bool[]",
-        "name": "",
-        "type": "bool[]"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "tokenURI",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function",
-    "constant": true
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      },
-      {
-        "internalType": "string",
-        "name": "_tokenURI",
-        "type": "string"
-      }
-    ],
-    "name": "setTokenUri",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  }
-]
\ No newline at end of file
diff --git a/flutter_bird_app/lib/config.dart b/flutter_bird_app/lib/config.dart
index 249dec3..bd3d939 100644
--- a/flutter_bird_app/lib/config.dart
+++ b/flutter_bird_app/lib/config.dart
@@ -1,5 +1,5 @@
 const chainId = 1001; // Klaytn Testnet baobab
-const flutterBirdSkinsContractAddress = '0xAca84dc56A05bbC7a335a74d9e13C91dfA2Ea16D';
+const flutterBirdSkinsContractAddress = '0xde8056279F21F43725cE2226457E98F1cDFef1f3';
 const ipfsGatewayUrl = 'https://nftstorage.link/ipfs/'; //FIXME: 
 const alchemyNodeProviderUrl = 'https://eth-goerli.g.alchemy.com/v2/';
 const walletConnectBridge = 'https://bridge.walletconnect.org';
diff --git a/flutter_bird_app/lib/controller/authentication_service.dart b/flutter_bird_app/lib/controller/authentication_service.dart
index 31790c2..de7effd 100644
--- a/flutter_bird_app/lib/controller/authentication_service.dart
+++ b/flutter_bird_app/lib/controller/authentication_service.dart
@@ -145,7 +145,7 @@ class AuthenticationServiceImpl implements AuthenticationService {
           requiredNamespaces: {
             'eip155': RequiredNamespace(
               chains: ['eip155:$operatingChain'],
-              methods: ['personal_sign'],
+              methods: ['personal_sign', 'eth_sendTransaction'],
               events: [],
             ),
           },
@@ -199,6 +199,33 @@ class AuthenticationServiceImpl implements AuthenticationService {
     }
   }
 
+  Future<String?> sendTransaction({
+    required String topic,
+    required int chainId,
+    required Map<String, String> txParams,
+  }) async {
+    try {
+      final dynamic txHash = await _connector!.request(
+        topic: topic,
+        chainId: 'eip155:$chainId',
+        request: SessionRequestParams(
+          method: 'eth_sendTransaction',
+          params: [txParams],
+        ),
+      );
+
+      if (txHash is String) {
+        return txHash;
+      } else {
+        print('Unexpected response type: ${txHash.runtimeType}');
+        return null;
+      }
+    } catch (e) {
+      print('Error sending transaction: $e');
+      return null;
+    }
+  }
+
   Future<void> _updateConnectionStatus() async {
     final sessions = _connector?.sessions.getAll();
   }
diff --git a/flutter_bird_app/lib/controller/authorization_service.dart b/flutter_bird_app/lib/controller/authorization_service.dart
index 2bc3823..3af7fa1 100644
--- a/flutter_bird_app/lib/controller/authorization_service.dart
+++ b/flutter_bird_app/lib/controller/authorization_service.dart
@@ -55,8 +55,8 @@ class AuthorizationServiceImpl implements AuthorizationService {
 
       futures.add(contract.tokenURI(tokenId).then((tokenUri) async {
         // Replace placeholder with actual skin
-        Skin? skin = await getSkin(tokenUri, tokenId.toInt());
-        if (skin == null) {
+        Skin? skin = await Skin(tokenId: tokenId.toInt(), name: skinName, imageLocation: tokenUri);
+        if (tokenUri.isEmpty) {
           skins?.remove(tokenId.toInt());
         } else {
           skins?[tokenId.toInt()] = skin;
@@ -68,26 +68,4 @@ class AuthorizationServiceImpl implements AuthorizationService {
     await Future.value(futures);
   }
 
-  /// Uses the token URI to fetch the image file from IPFS
-  /// @return the Skin Object with the correct image data
-  Future<Skin?> getSkin(String tokenUri, int tokenId) async {
-    Uri metadataUrl = Uri.parse(_ipfsUriToGateway(tokenUri));
-
-    try {
-      Response? metadataResponse = await http.get(metadataUrl);
-      Map<String, dynamic> metadata = jsonDecode(metadataResponse.body);
-
-      String skinName = metadata['name'];
-      String imageIpfsUri = metadata['image'];
-      String imageUrl = _ipfsUriToGateway(imageIpfsUri);
-
-      return Skin(tokenId: tokenId, name: skinName, imageLocation: imageUrl);
-    } on Exception catch (e) {
-      log('Failed to load metadata for tokenURI $tokenUri');
-      log(e.toString());
-    }
-    return null;
-  }
-
-  String _ipfsUriToGateway(String ipfsUri) => ipfsGatewayUrl + ipfsUri.substring(7);
 }
diff --git a/flutter_bird_app/lib/controller/flutter_bird_controller.dart b/flutter_bird_app/lib/controller/flutter_bird_controller.dart
index 7580c9a..e626270 100644
--- a/flutter_bird_app/lib/controller/flutter_bird_controller.dart
+++ b/flutter_bird_app/lib/controller/flutter_bird_controller.dart
@@ -1,7 +1,10 @@
 import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_bird/controller/authentication_service.dart';
 import 'package:flutter_bird/controller/authorization_service.dart';
+import 'package:flutter_bird/controller/mint_nft_service.dart';
 import 'package:flutter_bird/config.dart';
+import 'package:flutter/services.dart';
 
 import '../model/account.dart';
 import '../model/skin.dart';
@@ -10,6 +13,7 @@ import '../model/wallet_provider.dart';
 class FlutterBirdController extends ChangeNotifier {
   late final AuthenticationService _authenticationService;
   late final AuthorizationService _authorizationService;
+  late final NFTMinterService _nftMinterService;
 
   // Authentication state
   List<WalletProvider> get availableWallets => _authenticationService.availableWallets;
@@ -24,6 +28,8 @@ class FlutterBirdController extends ChangeNotifier {
 
   bool get isConnected => _authenticationService.isConnected;
 
+  NFTMinterService get nftMinterService => _nftMinterService;
+
   WalletProvider? get lastUsedWallet => (_authenticationService as AuthenticationServiceImpl).lastUsedWallet;
 
   String? get currentAddressShort =>
@@ -57,6 +63,9 @@ class FlutterBirdController extends ChangeNotifier {
       
       await (_authenticationService as AuthenticationServiceImpl).initialize(isInLiff);
       _authorizationService = AuthorizationServiceImpl(contractAddress: skinContractAddress, rpcUrl: rpcUrl);
+
+      final String abiJsonString = await rootBundle.loadString('assets/FlutterBirdSkins.json');
+      _nftMinterService = NFTMinterService(rpcUrl, flutterBirdSkinsContractAddress, abiJsonString, _authenticationService as AuthenticationServiceImpl);
       
     } catch (e) {
       lastError = 'Initialization error: $e';
@@ -65,6 +74,10 @@ class FlutterBirdController extends ChangeNotifier {
     }
   }
 
+  Future<void> mintNft() async {
+    await _nftMinterService.mintRandomSkin();
+  }
+
   Future<void> verifySignature() async {
     try {
       bool result = await (_authenticationService as AuthenticationServiceImpl).verifySignature();
diff --git a/flutter_bird_app/lib/controller/mint_nft_service.dart b/flutter_bird_app/lib/controller/mint_nft_service.dart
new file mode 100644
index 0000000..33b4a91
--- /dev/null
+++ b/flutter_bird_app/lib/controller/mint_nft_service.dart
@@ -0,0 +1,239 @@
+import 'dart:convert';
+import 'dart:typed_data';
+import 'dart:math';
+import 'package:flutter/services.dart';
+import 'package:web3dart/web3dart.dart';
+import 'package:http/http.dart' as http;
+import './authentication_service.dart';
+import 'package:web3dart/crypto.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
+
+class NFTMinterService {
+  final Web3Client _client;
+  final EthereumAddress _contractAddress;
+  final DeployedContract _contract;
+  final AuthenticationServiceImpl _authService;
+
+  String key = dotenv.env['PRIVATE_KEY'] ?? ''; 
+
+  NFTMinterService(String rpcUrl, String contractAddress, String abiJsonString, AuthenticationServiceImpl _authService)
+      : _client = Web3Client(rpcUrl, http.Client()),
+        _authService = _authService,
+        _contractAddress = EthereumAddress.fromHex(contractAddress),
+        _contract = _createContract(contractAddress, abiJsonString);
+
+  static DeployedContract _createContract(String contractAddress, String abiJsonString) {
+    try {
+      final abiJson = jsonDecode(abiJsonString);
+      final abiList = abiJson['abi'] as List<dynamic>;
+      return DeployedContract(
+        ContractAbi.fromJson(jsonEncode(abiList), 'FlutterBirdSkins'),
+        EthereumAddress.fromHex(contractAddress),
+      );
+    } catch (e) {
+      throw Exception('Failed to create contract: $e\nABI JSON: $abiJsonString');
+    }
+  }
+
+  Future<int> mintRandomSkin() async {
+    if (!_authService.isAuthenticated || !_authService.isOnOperatingChain) {
+      throw Exception('Wallet not connected or on wrong chain');
+    }
+
+    final session = _authService.currentSession;
+    if (session == null) {
+      throw Exception('No active WalletConnect session');
+    }
+
+    try {
+      // Get minted status list
+      final mintedStatusList = await _client.call(
+        contract: _contract,
+        function: _contract.function('getMintedTokenList'),
+        params: [],
+      );
+
+      final unmintedTokenId = _getUnmintedTokenId(mintedStatusList[0]);
+
+      if (unmintedTokenId == null) {
+        throw Exception("No unminted token available. All tokenIds have been minted.");
+      }
+
+      // Create and upload URI
+      await _createAndUploadUri(unmintedTokenId);
+
+      // Prepare transaction data
+      final function = _contract.function('mintSkin');
+      final data = function.encodeCall([BigInt.from(unmintedTokenId)]);
+
+      final sender = EthereumAddress.fromHex(_authService.authenticatedAccount!.address);
+      final gasEstimate = (await _client.estimateGas(
+        sender: sender,
+        to: _contractAddress,
+        data: data,
+        value: EtherAmount.fromInt(EtherUnit.ether, 1),
+      ) * BigInt.from(110)) ~/ BigInt.from(100);
+
+      final gasPrice = await _client.getGasPrice();
+      final nonce = await _client.getTransactionCount(sender);
+
+      final chainId = _authService.operatingChain;
+
+      final totalCost = gasEstimate * gasPrice.getInWei + BigInt.from(10).pow(18);
+
+      final balance = await _client.getBalance(sender);
+      if (balance.getInWei < totalCost) {
+        throw Exception('Insufficient balance. Required: ${totalCost}, Available: ${balance.getInWei}');
+      }
+
+      final gasLimit = gasEstimate * BigInt.from(2);
+      final txParams = {
+        'from': sender.hexEip55,
+        'to': _contractAddress.hexEip55,
+        'data': '0x${bytesToHex(data)}',
+        'value': '0x${BigInt.from(10).pow(18).toRadixString(16)}', // 1 ETH
+        'gasPrice': '0x${gasPrice.getInWei.toRadixString(16)}',
+        'gasLimit': '0x${gasLimit.toRadixString(16)}',
+        'nonce': '0x${nonce.toRadixString(16)}',
+      };
+
+
+      final txHash = await _authService.sendTransaction(
+        topic: session.topic,
+        chainId: chainId,
+        txParams: txParams,
+      );
+
+      if (txHash == null) {
+        throw Exception('Failed to send transaction');
+      }
+
+      return unmintedTokenId;
+
+    } catch (e) {
+      print('Error minting NFT: $e');
+      rethrow;
+    }
+  }
+
+  Future<String> _createAndUploadUri(int tokenId) async {
+    print('Create And Upload uri NFT # $tokenId');
+    final String imageUrl = 'https://flutter-bird-image-server.vercel.app';
+    final String name = 'Flutter Bird - $tokenId';
+    final String description = 'NFT Flutter Bird';
+
+    try {
+      final uri = await _createUri(
+        name: name,
+        description: description,
+        imageServerUrl: imageUrl,
+        tokenId: tokenId,
+      );
+
+      await _uploadUri(
+        BigInt.from(tokenId),
+        uri,
+      );
+
+      return uri;
+    } catch (e) {
+      print('Error: $e');
+      rethrow;
+    }
+  }
+
+
+  Future<String> _createUri({
+    required String name,
+    required String description,
+    required String imageServerUrl,
+    required int tokenId,
+  }) async {
+    try {
+      final response = await http.get(
+        Uri.parse('$imageServerUrl/api/image/$tokenId'),
+        headers: {
+          'Access-Control-Allow-Origin': '*',
+        },
+      );
+
+      if (response.statusCode != 200) {
+        throw Exception('Failed to load image: ${response.statusCode}');
+      }
+
+      final Map<String, dynamic> responseData = jsonDecode(response.body);
+      
+      final String imageDataUrl = responseData['imageDataUrl'];
+
+      final json = jsonEncode({
+        'name': name,
+        'description': description,
+        'image': imageDataUrl,
+      }).trim();
+
+      return 'data:application/json,${Uri.encodeFull(json)}';
+    } catch (e) {
+      print('Error creating URI: $e');
+      rethrow;
+    }
+  }
+
+  Future<void> _uploadUri(BigInt tokenId, String uri) async {
+    final data = Uint8List.fromList(utf8.encode(uri));
+    final function = _contract.function('appendUri');
+
+    Uint8List encodedCall = function.encodeCall([tokenId, [data]]);
+
+    try {
+      final privateKey = EthPrivateKey.fromHex(key);
+      final sender = await privateKey.address;
+
+      final gasEstimate = await _client.estimateGas(
+        sender: sender,
+        to: _contractAddress,
+        data: encodedCall,
+      );
+
+      final gasPrice = await _client.getGasPrice();
+      final nonce = await _client.getTransactionCount(sender);
+      final chainId = _authService.operatingChain;
+
+      final tx = Transaction(
+        to: _contractAddress,
+        from: sender,
+        nonce: nonce,
+        gasPrice: gasPrice,
+        maxGas: gasEstimate.toInt(),
+        data: encodedCall,
+      );
+
+      final signedTx = await _client.signTransaction(privateKey, tx, chainId: chainId);
+      final txResult = await _client.sendRawTransaction(signedTx);
+
+      print('Transaction hash: $txResult');
+    } catch (e) {
+      print('Error sending transaction: $e');
+      rethrow;
+    }
+
+  }
+
+  int? _getUnmintedTokenId(List<dynamic> mintedStatusList) {
+    final unmintedTokenIds = List<int>.generate(
+      mintedStatusList.length,
+      (i) => i,
+    ).where((i) => !mintedStatusList[i]).toList();
+
+    if (unmintedTokenIds.isEmpty) return null;
+
+    return unmintedTokenIds[Random().nextInt(unmintedTokenIds.length)];
+  }
+
+  String _bytesToHex(Uint8List bytes) {
+    return '0x' + bytes.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join();
+  }
+
+  void dispose() {
+    _client.dispose();
+  }
+}
diff --git a/flutter_bird_app/lib/view/main_menu_view.dart b/flutter_bird_app/lib/view/main_menu_view.dart
index 10e6778..234d068 100644
--- a/flutter_bird_app/lib/view/main_menu_view.dart
+++ b/flutter_bird_app/lib/view/main_menu_view.dart
@@ -8,6 +8,9 @@ import 'package:provider/provider.dart';
 
 import '../controller/flutter_bird_controller.dart';
 import '../controller/persistence/persistence_service.dart';
+import '../controller/authentication_service.dart';
+import '../controller/mint_nft_service.dart';
+import '../config.dart';
 import '../extensions.dart';
 import 'game_view.dart';
 import 'widgets/background.dart';
@@ -26,6 +29,7 @@ class MainMenuView extends StatefulWidget {
 
 class _MainMenuViewState extends State<MainMenuView> with AutomaticKeepAliveClientMixin {
   bool playing = false;
+  bool _isOverlayVisible = false;
 
   int lastScore = 0;
   int? highScore;
@@ -101,12 +105,14 @@ class _MainMenuViewState extends State<MainMenuView> with AutomaticKeepAliveClie
                 const Background(),
                 _buildBirdSelector(web3Service),
                 _buildMenu(web3Service),
+                _buildAuthenticationView(web3Service),
+                if (_isOverlayVisible) _buildOverlayMenu(web3Service),
               ]),
             ),
           );
         }),
       );
-    } catch(e, stackTrace) {
+    } catch (e, stackTrace) {
       print("Error in MainMenuView: $e");
       print("StackTrace: $stackTrace");
       return Scaffold(
@@ -115,7 +121,6 @@ class _MainMenuViewState extends State<MainMenuView> with AutomaticKeepAliveClie
         ),
       );
     }
-
   }
 
   Widget _buildMenu(FlutterBirdController web3Service) => Column(
@@ -156,7 +161,7 @@ class _MainMenuViewState extends State<MainMenuView> with AutomaticKeepAliveClie
               )),
           Expanded(
             flex: 1,
-            child: _buildAuthenticationView(web3Service),
+            child: SizedBox(),
           )
         ],
       );
@@ -263,68 +268,110 @@ class _MainMenuViewState extends State<MainMenuView> with AutomaticKeepAliveClie
         ],
       );
 
-  _buildAuthenticationView(FlutterBirdController web3Service) {
-    String statusText = 'No Wallet\nConnected';
-    if (web3Service.isAuthenticated) {
-      statusText = web3Service.isOnOperatingChain ? 'Wallet Connected' : 'Wallet on wrong chain';
-    }
+  Widget _buildAuthenticationView(FlutterBirdController web3Service) {
+    return Positioned(
+      bottom: 20,
+      right: 32,
+      child: GestureDetector(
+        onTap: _toggleOverlay,
+        child: Container(
+          height: 64,
+          width: 64,
+          decoration: BoxDecoration(
+            borderRadius: BorderRadius.circular(8),
+            color: Colors.white,
+            boxShadow: const [
+              BoxShadow(
+                color: Colors.black26,
+                blurRadius: 4,
+                offset: Offset(2, 2),
+              )
+            ],
+          ),
+          child: const Icon(Icons.menu, color: Colors.black),
+        ),
+      ),
+    );
+  }
 
-    return SafeArea(
+  void _toggleOverlay() {
+    setState(() {
+      _isOverlayVisible = !_isOverlayVisible;
+    });
+  }
+
+  Widget _buildOverlayMenu(FlutterBirdController web3Service) {
+    if (!_isOverlayVisible) return const SizedBox.shrink();
+
+    return Positioned.fill(
       child: GestureDetector(
-        onTap: _showAuthenticationPopUp,
-        child: Stack(
-          clipBehavior: Clip.none,
-          children: [
-            Positioned(
-              bottom: 20,
-              left: 32,
-              child: Row(
+        onTap: _toggleOverlay,
+        child: Container(
+          color: Colors.black54,
+          child: Center(
+            child: Container(
+              width: 300,
+              padding: const EdgeInsets.all(16),
+              decoration: BoxDecoration(
+                color: Colors.white,
+                borderRadius: BorderRadius.circular(16),
+              ),
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
                 children: [
-                  Container(
-                    height: 64,
-                    width: 64,
-                    decoration:
-                        BoxDecoration(borderRadius: BorderRadius.circular(8), color: Colors.white, boxShadow: const [
-                      BoxShadow(
-                        color: Colors.black26,
-                        blurRadius: 4,
-                        offset: Offset(2, 2),
-                      )
-                    ]),
-                    child: Center(
-                      child:
-                          kIsWeb ? Image.network('images/walletconnect.png') : Image.asset('images/walletconnect.png'),
-                    ),
-                  ),
-                  const SizedBox(
-                    width: 12,
-                  ),
-                  Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text(
-                        statusText,
-                        style: Theme.of(context)
-                            .textTheme
-                            .titleMedium
-                            ?.copyWith(color: Colors.white, fontWeight: FontWeight.bold),
-                      ),
-                      if (web3Service.isAuthenticated)
-                        Text(
-                          web3Service.currentAddressShort ?? '',
-                          style: Theme.of(context).textTheme.bodyMedium?.copyWith(color: Colors.white),
-                        )
-                    ],
-                  )
+                  _buildWalletConnectButton(web3Service),
+                  const SizedBox(height: 16),
+                  _buildMintButton(web3Service),
                 ],
               ),
             ),
-          ],
+          ),
         ),
       ),
     );
   }
 
+  Widget _buildWalletConnectButton(FlutterBirdController web3Service) {
+    String statusText = web3Service.isAuthenticated
+        ? (web3Service.isOnOperatingChain ? 'Wallet Connected' : 'Wrong Chain')
+        : 'Connect Wallet';
+
+    return ElevatedButton(
+      onPressed: _showAuthenticationPopUp,
+      child: Text(statusText),
+    );
+  }
+
+  Widget _buildMintButton(FlutterBirdController web3Service) {
+    return ElevatedButton(
+      onPressed: web3Service.isAuthenticated && web3Service.isOnOperatingChain
+          ? () => _mintNFT(web3Service)
+          : null,
+      child: const Text('Mint Bird'),
+    );
+  }
+
+  Future<void> _mintNFT(FlutterBirdController web3Service) async {
+    try {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Minting process started. Please check your wallet for confirmation.')),
+      );
+
+      int newTokenId = await web3Service.nftMinterService.mintRandomSkin();
+
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('NFT #$newTokenId minted successfully!')),
+      );
+
+      await web3Service.authorizeUser(forceReload: true);
+
+    } catch (e) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Error minting NFT: $e')),
+      );
+    }
+  }
+
   _showAuthenticationPopUp() {
     Navigator.of(context).push(PageRouteBuilder(
       opaque: false,
diff --git a/flutter_bird_app/lib/view/widgets/bird.dart b/flutter_bird_app/lib/view/widgets/bird.dart
index 6ba0c43..1496716 100644
--- a/flutter_bird_app/lib/view/widgets/bird.dart
+++ b/flutter_bird_app/lib/view/widgets/bird.dart
@@ -1,5 +1,6 @@
+import 'dart:convert';
+import 'dart:typed_data';
 import 'package:flutter/material.dart';
-
 import '../../model/skin.dart';
 
 class Bird extends StatelessWidget {
@@ -24,17 +25,53 @@ class Bird extends StatelessWidget {
       return _buildLoadingIndicator(context, 0.3);
     }
 
-    return Image.network(
-      skin!.imageLocation!,
-      loadingBuilder: (context, child, loadingProgress) {
-        if (loadingProgress == null) return child;
-        return _buildLoadingIndicator(
-            context, loadingProgress.cumulativeBytesLoaded / (loadingProgress.expectedTotalBytes ?? 1000));
-      },
+    try {
+      final imageDataUrl = _extractImageDataUrl(skin!.imageLocation!);
+      return Image.memory(
+        _dataUrlToBytes(imageDataUrl),
+        errorBuilder: (context, error, stackTrace) {
+          print('Error loading image: $error');
+          return _buildErrorWidget(context);
+        },
+      );
+    } catch (e) {
+      print('Error processing image data: $e');
+      return _buildErrorWidget(context);
+    }
+  }
+
+  Uint8List _dataUrlToBytes(String dataUrl) {
+    final base64Str = dataUrl.split(',').last;
+    return base64Decode(base64Str);
+  }
+
+  String _extractImageDataUrl(String tokenUri) {
+    try {
+      final jsonStr = tokenUri.replaceFirst('data:application/json,', '');
+      String decodedStr = Uri.decodeFull(jsonStr);
+      Map<String, dynamic> jsonData = jsonDecode(decodedStr);
+      if (jsonData.containsKey('image')) {
+        return jsonData['image'] as String;
+      } else {
+        throw FormatException('Invalid JSON structure or missing image field');
+      }
+    } catch (e) {
+      print('Error extracting image data URL: $e');
+      print("tokenUri: ${tokenUri}, ${e}");
+      rethrow;
+    }
+  }
+
+  Widget _buildErrorWidget(BuildContext context) {
+    return Container(
+      color: Colors.grey[300],
+      child: Center(
+        child: Icon(Icons.error, color: Colors.red),
+      ),
     );
   }
 
-  _buildLoadingIndicator(BuildContext context, double? value) => Column(
+  Widget _buildLoadingIndicator(BuildContext context, double? value) => Column(
         mainAxisAlignment: MainAxisAlignment.spaceAround,
         children: [
           CircularProgressIndicator(