To use Moralis provider that is injected with wallet you need to load it into async function, good way to do that could be to put it into async functiona and call it when its convinient which would be when you connect with wallet. So we do this\ const getProvider = async () => { const provider = await Moralis.enableWeb3(); const myContract = new ethers.Contract(contractAddress, abi, provider); }; and then call it on useEffect when web3 is enabled. useEffect(() => { if (isWeb3Enabled) { getPro...

To use Moralis provider that is injected with wallet you need to load it into async function, good way to do that could be to put it into async functiona and call it when its convinient which would be when you connect with wallet. So we do this\ const getProvider = async () => { const provider = await Moralis.enableWeb3(); const myContract = new ethers.Contract(contractAddress, abi, provider); }; and then call it on useEffect when web3 is enabled. useEffect(() => { if (isWeb3Enabled) { getPro...

To compute the function signature offchain and use it in interaction with smart contract function probably with calldata you will probably use either ethers.js or web3 library so this is how you get that function hash and first four bytes that are used in function definitions in solidity ethers.utils.keccak256(ethers.utils.toUtf8Bytes("initialize")).substr(0, 10) or web3.utils.sha3('initialize()').substr(0, 10) both will result in this output 0x8129fc1c which can later be applied fo...

To compute the function signature offchain and use it in interaction with smart contract function probably with calldata you will probably use either ethers.js or web3 library so this is how you get that function hash and first four bytes that are used in function definitions in solidity ethers.utils.keccak256(ethers.utils.toUtf8Bytes("initialize")).substr(0, 10) or web3.utils.sha3('initialize()').substr(0, 10) both will result in this output 0x8129fc1c which can later be applied fo...

There were many methods how to reveal your NFTs, many were complicated, and some were easily manipulated. I will write one that is rather simple but still can be verified that it’s not rigged. So let’s do the code first, its a rather simple thing of having this in your tokenURI functionfunction tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); if (revealed == false) { return notRevealedUri; } string me...

There were many methods how to reveal your NFTs, many were complicated, and some were easily manipulated. I will write one that is rather simple but still can be verified that it’s not rigged. So let’s do the code first, its a rather simple thing of having this in your tokenURI functionfunction tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); if (revealed == false) { return notRevealedUri; } string me...

I wanted to define interface usage once and then run it in few functions, not define it in each one, so to do that I have first define MainContract as Main and then through constructor I assign it a address of this other contract and later I can just use this other contract methods as in checkOther functioninterface MainContract { function checkDisplay() external view returns (string memory); } contract second { MainContract Main; constructor(address _interface) { Main = MainContract(_interfa...

I wanted to define interface usage once and then run it in few functions, not define it in each one, so to do that I have first define MainContract as Main and then through constructor I assign it a address of this other contract and later I can just use this other contract methods as in checkOther functioninterface MainContract { function checkDisplay() external view returns (string memory); } contract second { MainContract Main; constructor(address _interface) { Main = MainContract(_interfa...

Want to send some message to someone coded into the blockchain, you can do it with this snippet of code. You don't need to send ether, you can make it 0.00 or just remove value parameter when sending.const ethers = require("ethers") const provider = new ethers.providers.JsonRpcProvider( "https://eth-rinkeby.alchemyapi.io/v2/your-provider" ) let privateKey = "your key" let wallet = new ethers.Wallet(privateKey, provider) let receiverAddress = "some-address" let amountInEther = "0.001" let...

Want to send some message to someone coded into the blockchain, you can do it with this snippet of code. You don't need to send ether, you can make it 0.00 or just remove value parameter when sending.const ethers = require("ethers") const provider = new ethers.providers.JsonRpcProvider( "https://eth-rinkeby.alchemyapi.io/v2/your-provider" ) let privateKey = "your key" let wallet = new ethers.Wallet(privateKey, provider) let receiverAddress = "some-address" let amountInEther = "0.001" let...

This snippet of code has a nice way of showing how you can keep state changes with .call and calling a function with signatures. If you call "regular" function that calls other function in classic way, your state changes will not be reflected as trx will fail and testValue will be 0 as default. But if you call signatureFail which calls "transferFail" function with .call notation you will get info that this call failed as it will still have require or revert fire and "transferFail" function wi...

This snippet of code has a nice way of showing how you can keep state changes with .call and calling a function with signatures. If you call "regular" function that calls other function in classic way, your state changes will not be reflected as trx will fail and testValue will be 0 as default. But if you call signatureFail which calls "transferFail" function with .call notation you will get info that this call failed as it will still have require or revert fire and "transferFail" function wi...

There is nice plugin that I use as default for my hardhat setup and that is hardhat-preprocessor, so let’s install it https://www.npmjs.com/package/hardhat-preprocessor and depending on if you are using TS or plain JS you would add this in .js configconst { removeConsoleLog } = require("hardhat-preprocessor"); and then at start of your config file you define which networks you want to make clean and without console.log statements and importmodule.exports = { defaultNetwork: "hardhat", preproc...

There is nice plugin that I use as default for my hardhat setup and that is hardhat-preprocessor, so let’s install it https://www.npmjs.com/package/hardhat-preprocessor and depending on if you are using TS or plain JS you would add this in .js configconst { removeConsoleLog } = require("hardhat-preprocessor"); and then at start of your config file you define which networks you want to make clean and without console.log statements and importmodule.exports = { defaultNetwork: "hardhat", preproc...

After you did your standard github pages setup (ggl it) To make this work first you need to to set config of your next.config.js like this module.exports = { assetPrefix: "/mweb/", basePath: "/mweb", }; where mweb is the name of your repo https://github.com/n00b21337/mweb then when you run static export and upload those files to that repo you will need to also add one file there and that is empty .nojekyll file that will stop jekyll from doing automation part that removes all the _next files ...

After you did your standard github pages setup (ggl it) To make this work first you need to to set config of your next.config.js like this module.exports = { assetPrefix: "/mweb/", basePath: "/mweb", }; where mweb is the name of your repo https://github.com/n00b21337/mweb then when you run static export and upload those files to that repo you will need to also add one file there and that is empty .nojekyll file that will stop jekyll from doing automation part that removes all the _next files ...

There are multiple ways we can do that and also depends on which smart contract is implemented. 1. If we have SC that has IERC721Enumerable https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/cont… implemented that this is not a big problem as there is tokenOfOwnerByIndex method that gets you which IDs of tokens an address has based on index. You first need to get number of tokens an address has with balanceOf and then you can iterate them and get all the IDs of tokens with tok...

There are multiple ways we can do that and also depends on which smart contract is implemented. 1. If we have SC that has IERC721Enumerable https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/cont… implemented that this is not a big problem as there is tokenOfOwnerByIndex method that gets you which IDs of tokens an address has based on index. You first need to get number of tokens an address has with balanceOf and then you can iterate them and get all the IDs of tokens with tok...

By default when using ethers.js and receiving LOG from chain it won’t show you info on why some transaction failed and revert, and for that you will need to run different set of methods like in code below. If there is a revert message, you will be able to fetch it and display it in the end. Sometimes there is no message and transaction just fails with some error, in that case you can’t do much. const txHash = "0xc472ffe391c5f4571540dc4bc8bfc1d680b6ce0c7b25e08cb19e315085b58e69"; const tx = awa...

By default when using ethers.js and receiving LOG from chain it won’t show you info on why some transaction failed and revert, and for that you will need to run different set of methods like in code below. If there is a revert message, you will be able to fetch it and display it in the end. Sometimes there is no message and transaction just fails with some error, in that case you can’t do much. const txHash = "0xc472ffe391c5f4571540dc4bc8bfc1d680b6ce0c7b25e08cb19e315085b58e69"; const tx = awa...

There is nice article on how to cut down on your smart contract costs by optimizing mints and transfers, mostly you have to omit ERC721Enumerable library from open zeppelin, which is useful but costs lots of gas if on Ethereum, for L2s and sidechains you can probably ignore that and just use full featured OZ contracts. https://shiny.mirror.xyz/OUampBbIz9ebEicfGnQf5At_ReMHlZy0tB4glb9xQ0E So when you have frontend and you want to show your user tokens that he owns if you don’t want to use third...

There is nice article on how to cut down on your smart contract costs by optimizing mints and transfers, mostly you have to omit ERC721Enumerable library from open zeppelin, which is useful but costs lots of gas if on Ethereum, for L2s and sidechains you can probably ignore that and just use full featured OZ contracts. https://shiny.mirror.xyz/OUampBbIz9ebEicfGnQf5At_ReMHlZy0tB4glb9xQ0E So when you have frontend and you want to show your user tokens that he owns if you don’t want to use third...

Different wallet scripts usually use window.localStorage for saving data for reuse and determination of what is the status of wallet connect, sometimes this could be awire and you need to clear it, you could delete all in browser like cookies, stored data and all the rest but you can also call first this in console​​​​​​​window.localStorage to check what is saved and then you can delete it all withlocalStorage.clear(); orlocalStorage.removeItem("name of localStorage variable you want to remov...

Different wallet scripts usually use window.localStorage for saving data for reuse and determination of what is the status of wallet connect, sometimes this could be awire and you need to clear it, you could delete all in browser like cookies, stored data and all the rest but you can also call first this in console​​​​​​​window.localStorage to check what is saved and then you can delete it all withlocalStorage.clear(); orlocalStorage.removeItem("name of localStorage variable you want to remov...