Published inCoinmonks·PinnedWhat I learned from building Cool Cats NFTSolidity — seriously — Cool Cats is the second solidity contract I have ever published on the Ethereum blockchain, and I was a solidity noob through and through. We all have to start somewhere and I want to share my whole uncensored NFT journey with you. How it all started One day I spotted a cute pixel NFT…Nft10 min readNft10 min read
Published inCoinmonks·Jul 31How I put an NFT collection of 20k animated GIFs on-chain and saved 9 Eth on gasBaby Pepes move on-chain The first thing that comes to mind when reading the title is, why bother? The honest answer is that it seemed like a fun challenge and it was. …Solidity14 min readSolidity14 min read
Published inCoinmonks·Sep 6, 202210 Simple Ways to Save Gas with SolidityBelow is a list of just a few simple ways you can save gas in solidity contracts. The full list is seemingly endless, but all boils down to finding the most efficient way to perform an action with the minimum number of operations. Table of contents State data vs bytecode data The power…Solidity5 min readSolidity5 min read
Published inCoinmonks·Sep 2, 2022Save Gas with Data PackingStorage writes are expensive, write less Chances are you have interacted with a smart contract and thought — geez that was expensive. I know I have. The culprit is usually the number of writes to storage or just simply bad logic. I cant help too much with bad logic, that…Solidity5 min readSolidity5 min read
May 25, 2022Cooltopia Login and Permission SystemA Solidity authorization and permission system If you have used Cooltopia, you will know that you only need to authorize your account once via a signed message. After that, you will no longer see any wallet popups asking for permissions. …Solidity7 min readSolidity7 min read
Published inCoinmonks·Dec 19, 2021Solidity — Random NumbersHopefully, you know that it is impossible to generate a random number purely on-chain. You need to use services like chainlink, but let's be completely honest, pseudo-random is usually good enough for most needs. However, sometimes you need multiple random numbers and things start to get expensive in terms of…Solidity5 min readSolidity5 min read
Published inCoinmonks·Oct 22, 2021Verifying Solidity SignaturesProcessing everything on-chain is great, but not always practical and sometimes you might want to do something a little tricky in order to save users gas. Sadly, simply passing the desired data to a contract is not secure and without security measures, people will certainly abuse your contract. There is…Solidity2 min readSolidity2 min read
Aug 30, 2021Cool Cats Air Dropper v2Automated drops — The first air dropper I created was a semi-auto dropper that required a fair amount of manual data entry. Not ideal, prone to human error and slow. At the time it made sense due to time constraints. …Cool Cats3 min readCool Cats3 min read
Aug 15, 2021The Reality of Running an NFTCommunity is key Let me preface this article by saying, I speak to many NFTs owners and prospective owners. Nothing in this article is directed at any single person or NFT project. It is mostly a reflection of my personal experiences. The Cool Cats team didn't expect things to grow…Nft5 min readNft5 min read
Aug 9, 2021Cool Cats Contract — ImprovementsCool Cats launched a little over five weeks ago, although it feels like much longer. In that time I have spotted a few projects using the Cool Cats contract as a base for their NFT. As such, I feel that I should outline contract improvements that I would make. Trimming the fat In…Nft2 min readNft2 min read
