--- title: "Cases" --- # Cases ## TON Tigers ![TON Tigers](https://metalamp.io/images/TON%20Tigers.png) # TON Tigers Telegram Mini App [See all cases](https://metalamp.io/cases) ![](https://metalamp.io/images/ton-tigers/main-screen-pic-mobile.png) ![](https://metalamp.io/images/ton-tigers/main-screen-pic-tablet.png) ![](https://metalamp.io/images/ton-tigers/main-screen-pic-desktop.png) ![Tiger](https://metalamp.io/images/ton-tigers/main-screen-animation.webp) ![Claimy](https://metalamp.io/images/ton-tigers/main-screen-claimy.webp) 0 ## About the game This is a **P2E (Play-to-Earn)** game on the **TON blockchain** (TMA — Telegram Mini App), where the primary resource is the meme token **$TIGER**. [Learn about TON Development](https://metalamp.io/ton) In this game, users purchase **NFT collections** featuring various characters, complete tasks, and earn in-game currency tokens. ## App functionality - ### Tasks During the game, users must complete various tasks, such as placing their first tiger, mining notTIGER, inviting referrals, and more. - ### Achievements Players earn achievements for completing various actions, such as placing their first tiger. - ### Leaderboards A table listing all players competing each game season for $TIGER tokens — a real cryptocurrency on the TON network. - ### Referral Program A mechanism that allows users to earn rewards by inviting others to join the game. - ### Withdrawal of earned tokens to user wallets Players can exchange in-game currency **notTIGER** for real **TIGER** tokens and withdraw them to their wallets. - ### Purchasing Boosts to Upgrade NFTs in the Game Players can spend their TIGER tokens to acquire boosts that temporarily enhance multipliers. For example: - **Fish** halves the mining time. - **Meat** increases the amount of notTIGER claimed. ### Tasks During the game, users must complete various tasks, such as placing their first tiger, mining notTIGER, inviting referrals, and more. ### Achievements Players earn achievements for completing various actions, such as placing their first tiger. ### Leaderboards A table listing all players competing each game season for $TIGER tokens — a real cryptocurrency on the TON network. ### Referral Program A mechanism that allows users to earn rewards by inviting others to join the game. ### Withdrawal of earned tokens to user wallets Players can exchange in-game currency **notTIGER** for real **TIGER** tokens and withdraw them to their wallets. ### Purchasing Boosts to Upgrade NFTs in the Game Players can spend their TIGER tokens to acquire boosts that temporarily enhance multipliers. For example: - **Fish** halves the mining time. - **Meat** increases the amount of notTIGER claimed. ![](https://metalamp.io/images/ton-tigers/functionality-section-img-1.webp) ![](https://metalamp.io/images/ton-tigers/functionality-section-img-2.webp) ![](https://metalamp.io/images/ton-tigers/functionality-section-img-3.webp) ## Process ### 1 week Requirements gathering and game description ### 3 days Description and prioritization of features, task allocation ### From start to finish Involving the designer: creating the application interface ### 2 months Involving two backend developers: working on the technical aspects ### 1 month Involving a frontend developer: interface layout development ## Ready-made solution for TMA and TON applications We’ve created our own packaged solution with the most popular features for deploying clickers, quest games, loyalty systems, and more. Our team can either implement the ready-made application or customize it to meet your specific goals. the implementation cost up to $15k the implementation time up to 3 weeks The cost of customization is discussed on an individual basis. [Book a demo](#modal_for_form_without_textarea) ![Ready-made solution for TMA and TON applications](https://metalamp.io/images/ton-tigers/ready-solution-section-img.webp) ## Results - Created an MVP ready for production launch. - Launched a closed beta test and showcased the game to key investors: whales and loyal community members. - Collected real feedback and fixed bugs. ## Starring Networking Nico Bordunenko Project Manager Anastacia Kozlova Front-end developer Konstantin Kandruk Back-end developer Daniil Petrochenkov Designer Daniil Egorov Networking Nico Bordunenko Project Manager Anastacia Kozlova Front-end developer Konstantin Kandruk Back-end developer Daniil Petrochenkov Designer Daniil Egorov [Lees meer...](https://metalamp.io/cases/ton-tigers.md) ## Arkitekt DEX ![Arkitekt DEX](https://metalamp.io/images/Arkitekt%20DEX.png) ![](https://metalamp.io/images/arkitekt-dex/main-screen-pic.svg) [See all cases](https://metalamp.io/cases) # Trading crypto platform ARKITEKT DEX development timeline 3 months L2 network Base smart contracts Solidity ## Task for Development Create an MVP for a DEX with the following features: swaps, liquidity pools, spNFT staking, and rewards for staking. The client was looking for a team to integrate existing contracts and frontend into a cohesive product and chose MetaLamp for the job. [Learn more about MVP development](https://metalamp.io/mvp-development) ## What was the starting point disorganized workflow incomplete frontend smart contracts with bugs ## What we did ### Process Organization We assembled a team of skilled and confident specialists, replacing scattered freelancers with a full development team led by a project manager. Vyacheslav Frontend developer ![Vyacheslav](https://metalamp.io/images/arkitekt-dex/vyacheslav-gerasimov.png) Stepan Frontend developer ![Stepan](https://metalamp.io/images/arkitekt-dex/stepan-kryukov.png) Roman Solidity developer ![Roman](https://metalamp.io/images/arkitekt-dex/roman-yarlykov.png) Aleksei Solidity developer ![Aleksei](https://metalamp.io/images/arkitekt-dex/aleksei-kutsenko.png) Victoria Project manager ![Victoria](https://metalamp.io/images/arkitekt-dex/victoria-chebodaeva.png) This allowed us to speed up the development process and shorten the timeline for the product’s commercial launch. We transformed all client requirements into a clear roadmap of tasks and deliverables. ### Frontend Improvements Our frontend development team integrated the smart contracts with the interface and completely overhauled the layout, removing non-functional elements and enhancing both usability and user experience. Fixed bugs ![](https://metalamp.io/images/arkitekt-dex/what-did-section-screenshot.png) Fixed bugs ![](https://metalamp.io/images/arkitekt-dex/what-did-section-screenshot.png) We’ll help speed up development and launch the MVP Book a consultation via Calendly [![Calendly](https://metalamp.io/images/icons/calendly.svg)](https://calendly.com/iana-g/30min) ### Refinement of smart contracts and network selection The team adapted the smart contracts for the new network, deployed them, and set up the DEX subgraph to display prices and calculate APR. To address the task, we selected the Camelot protocol. We conducted extensive research, integrated it with the frontend, and migrated the platform to Scroll, ZkSync, and Base. Research ![](https://metalamp.io/images/arkitekt-dex/what-did-section-screenshot.png) Research ![](https://metalamp.io/images/arkitekt-dex/what-did-section-screenshot.png) For deploying the smart contracts, the client changed their network choice several times: Initially, they chose Scroll, an EVM-compatible network. Then, they switched to zkSync, which has lower EVM compatibility and required us to delve deeper and gain more expertise. Ultimately, the client decided on Base. ## As a result we accomplished it! In just 3 months, our client received a functional MVP solution on the Base Sepolia network. The project is now at the stage of launching on the mainnet. [Awesome! I want the same](#modal_for_form_without_textarea) [Lees meer...](https://metalamp.io/cases/arkitekt-dex.md) ## Akropolis ![Akropolis](https://metalamp.io/images/cases/akropolis.png) [See all cases](https://metalamp.io/cases) # Akro po lis DeFi yield aggregator for investing in crypto products In 2019, Akropolis launched an initial coin offering (ICO), and our team came on board to help the client develop and test the MVP in the early stages of product development. ![](https://metalamp.io/images/akropolis/why-us-section-img-desktop.webp) ## Why did the client choose us? The client needed a strong frontend team and multiple developers right away. Hiring an in-house frontend developer could have taken 3-4 weeks, and putting together a full team would have taken even longer and been more expensive. On top of that, they needed to launch as quickly as possible. By 2019, we already had around 20 experienced frontend developers, with major projects under our belt (like Improvado and Datalight), involving complex tables and advanced client-side computations. We were the perfect fit for the job. [Want to work with you](#modal_for_form_without_textarea) ## How did we impact the project? - 03 days the speed at which our team got onboard - 04 people our development team at the start of the project - 03 months reduced time to market by skipping in-house hires and working with an outsourced team ![](https://metalamp.io/images/akropolis/mvp-section-bg.webp) ## Launched 10 different MVP versions The Akropolis project started as a decentralized savings and pension fund — an alternative to government pension funds, which people often distrust due to issues like corruption and lack of transparency. ![](https://metalamp.io/images/akropolis/mvp-section-bg.webp) The client needed to quickly test various hypotheses. We efficiently handled all the frontend work for these MVPs. ![mvp-section-img-1](https://metalamp.io/images/akropolis/mvp-section-img-1.png) ![mvp-section-img-2](https://metalamp.io/images/akropolis/mvp-section-img-2.png) ![mvp-section-img-1](https://metalamp.io/images/akropolis/mvp-section-img-1.png) ![mvp-section-img-2](https://metalamp.io/images/akropolis/mvp-section-img-2.png) ![](https://metalamp.io/images/akropolis/mvp-section-img-2.png) ![](https://metalamp.io/images/akropolis/mvp-section-img-1.png) ![](https://metalamp.io/images/akropolis/mvp-section-img-2.png) We made every effort to reuse previous work, such as UI component libraries, wallet integration, approval systems, and balance features. This approach allowed us to speed up development and quickly release the initial versions of the products. [Want to work with you](#modal_for_form_without_textarea) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ![](https://metalamp.io/images/akropolis/problems-section-medusa.webp) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ![](https://metalamp.io/images/akropolis/problems-section-clouds.png) ## Challenges we faced 2022 year An event occurred that shaped the future direction of the platform and our work: criminals stole 2,030,850 Dai (DAI) using the savings pools. After the hack, the product strategy shifted: the client decided to fully switch to front-end protocols for enhanced security. All tasks were handed over to our team. 06 experts were involved at the time We learned how to handle critical situations: quickly providing updates to the project community, writing announcements, and staying available, as frontend developers might also be needed to promptly disable certain features. ![](https://metalamp.io/images/akropolis/today-section-akropolis.png) ![](https://metalamp.io/images/akropolis/today-section-clouds.png) ![](https://metalamp.io/images/akropolis/today-section-clouds.png) Our work with Akropolis led to 5 years of close collaboration. ## How the product is evolving today The product development strategy depends on the community (DAO), which votes on whether to approve or reject new decisions. Our team suggests updates and improvements for the product, and they receive support from the community. ![today-section-img-1](https://metalamp.io/images/akropolis/today-section-img-1.png) ![today-section-img-2](https://metalamp.io/images/akropolis/today-section-img-2.png) ![today-section-img-1](https://metalamp.io/images/akropolis/today-section-img-1.png) ![today-section-img-2](https://metalamp.io/images/akropolis/today-section-img-2.png) ![](https://metalamp.io/images/akropolis/today-section-img-1.png) ![](https://metalamp.io/images/akropolis/today-section-img-2.png) ![](https://metalamp.io/images/akropolis/today-section-img-1.png) ### Liquity After integrating Liquity into Akropolis, users gained the ability to stake their ETH to receive loans in the stablecoin LUSD, without having to repay the loan by a specific deadline. This added an extra layer of financial flexibility to the Akropolis platform, giving users more options for managing their assets. Now, users can make better use of their cryptocurrency portfolios by accessing liquidity without needing to sell their Ether investments. ![today-section-img-3](https://metalamp.io/images/akropolis/today-section-img-3.png) ![today-section-img-4](https://metalamp.io/images/akropolis/today-section-img-4.png) ![today-section-img-3](https://metalamp.io/images/akropolis/today-section-img-3.png) ![today-section-img-4](https://metalamp.io/images/akropolis/today-section-img-4.png) ![](https://metalamp.io/images/akropolis/today-section-img-4.png) ![](https://metalamp.io/images/akropolis/today-section-img-3.png) ![](https://metalamp.io/images/akropolis/today-section-img-4.png) ### Lido After integrating Lido, Akropolis users can now participate in Ethereum staking directly through the platform, receiving stETH staking tokens in exchange for their staked ETH. This provides them with a steady income from staking, boosting the returns on their investments without the need to manage hardware or worry about minimum deposit amounts. ## Technology stack - ### React A library for building interfaces: the perfect solution for a component-based architecture. - ### Typescript Enhances security during development and changes, and improves performance in high-traffic projects. - ### NextJS A framework for frontend applications that addresses many developer pain points, from build configuration to server-side rendering (SSR). - ### RxJS A library for "advanced event management" and a "more powerful alternative to promises" all in one. It helps organize event handling and asynchronous code efficiently, and allows for writing complex logic in a declarative manner. - ### GraphQL & The Graph Network Transforms blockchain transaction history into domain-specific entities for the project, providing an API for searching and retrieving the necessary information. ![Alexander Mazaletsky](https://metalamp.io/images/akropolis/feedback-section-avatar.png) Alexander Mazaletsky — ExCTO I’ve had a chance to work with the guys on 2 different blockchain projects. Over the time of cooperation, they showed the strongest technical skills, total commitment to the project, and shared understanding. It’s a real pleasure to work with them. In 2019, when we started working with Akropolis, it was our first major project in web3. You could say this project set our course: to focus specifically on blockchain development. Today, we’re a company specializing in crypto and blockchain solutions, and we are among the leaders in the global market. [Want to work with you](#modal_for_form_without_textarea) ## More our blockchain cases [See all cases](https://metalamp.io/cases) ## MetaLamp Magazine We share our expertise in the articles. You can read more about web3, blockchain and our experience. [Read more](https://metalamp.io/magazine) [Read more](https://metalamp.io/magazine) [Lees meer...](https://metalamp.io/cases/akropolis.md) ## Cpaytoday ![Cpaytoday](https://metalamp.io/images/Multisender%201.png) [See all cases](https://metalamp.io/cases) # Cpaytoday Crypto multisend tool for business payments 1 month for launching a MVP 1 month for launching a MVP 1 month for launching a MVP 2 developers 2 developers 2 developers Tron, Binance, Ethereum chains supported Tron, Binance, Ethereum chains supported Tron, Binance, Ethereum chains supported the Google Store released on the Google Store released on the Google Store released on [Want the same](#modal_for_form_without_textarea) ## The Task The founders of the product wanted to create a tool for convenient and fast cryptocurrency payments. ## The Task The founders of the product wanted to create a tool for convenient and fast cryptocurrency payments. ## The Task The founders of the product wanted to create a tool for convenient and fast cryptocurrency payments. ### What problem did Cpaytoday aim to solve: ### What problem did Cpaytoday aim to solve: ### What problem did Cpaytoday aim to solve: Financial calculations (salaries, contractor payments) are done in one service (Google Sheets), while payments are made in others (cold wallets). Financial calculations (salaries, contractor payments) are done in one service (Google Sheets), while payments are made in others (cold wallets). Financial calculations (salaries, contractor payments) are done in one service (Google Sheets), while payments are made in others (cold wallets). There are no convenient solutions for automatic generation of multi-currency payments in cryptocurrencies. There are no convenient solutions for automatic generation of multi-currency payments in cryptocurrencies. There are no convenient solutions for automatic generation of multi-currency payments in cryptocurrencies. While the market for crypto tools for businesses is gradually growing, both of these problems complicate and lengthen the process of working with crypto payments, potentially creating space for new products. While the market for crypto tools for businesses is gradually growing, both of these problems complicate and lengthen the process of working with crypto payments, potentially creating space for new products. While the market for crypto tools for businesses is gradually growing, both of these problems complicate and lengthen the process of working with crypto payments, potentially creating space for new products. ## The Solution Our goal was to implement the MVP as quickly and simply as possible in order to reduce Time to Market and start showing users the first version of the product, gather feedback, and validate demand for such a product. ## The Solution Our goal was to implement the MVP as quickly and simply as possible in order to reduce Time to Market and start showing users the first version of the product, gather feedback, and validate demand for such a product. ## The Solution Our goal was to implement the MVP as quickly and simply as possible in order to reduce Time to Market and start showing users the first version of the product, gather feedback, and validate demand for such a product. - ![](https://metalamp.io/images/cpaytoday/solution-section-img-1.png) The solution is presented as an extension for Google Sheets. Since most surveyed users used Google Sheets for calculating salaries and expenses for contractors, creating a tool to work directly within the spreadsheet interface seemed like the best solution. - ![](https://metalamp.io/images/cpaytoday/solution-section-img-2.png) We integrated Binance, Ethereum, and Tron networks. For the MVP, we chose some of the most popular networks because adding more networks would require writing more smart contracts and lengthening the development process. - ![](https://metalamp.io/images/cpaytoday/solution-section-img-3.png) Automatic data detection. Users only needed to select columns with the cryptocurrency wallet address and payment amount in the spreadsheets, and the data was automatically pulled into the payment process. The solution is presented as an extension for Google Sheets. Since most surveyed users used Google Sheets for calculating salaries and expenses for contractors, creating a tool to work directly within the spreadsheet interface seemed like the best solution. ![solution-section-img-1-table](https://metalamp.io/images/cpaytoday/solution-section-img-1-table.png) ![solution-section-img-1-app](https://metalamp.io/images/cpaytoday/solution-section-img-1-app.png) We integrated Binance, Ethereum, and Tron networks. For the MVP, we chose some of the most popular networks because adding more networks would require writing more smart contracts and lengthening the development process. ![solution-section-img-2-table](https://metalamp.io/images/cpaytoday/solution-section-img-1-table.png) ![solution-section-img-2-app](https://metalamp.io/images/cpaytoday/solution-section-img-2-app.png) Automatic data detection. Users only needed to select columns with the cryptocurrency wallet address and payment amount in the spreadsheets, and the data was automatically pulled into the payment process. ![solution-section-img-3-table](https://metalamp.io/images/cpaytoday/solution-section-img-3-table.png) ![solution-section-img-3-app](https://metalamp.io/images/cpaytoday/solution-section-img-3-app.png) These features were enough for the first user tests. These features were enough for the first user tests. These features were enough for the first user tests. ## Team and the Technology stack Team and the Technology stack Team and the Technology stack - ![Pavel](https://metalamp.io/images/cpaytoday/team-img-1.png) ### Frontend developer Pavel - ![Alex](https://metalamp.io/images/cpaytoday/team-img-2.png) ### Smart-contract developer Alex - ![Denis](https://metalamp.io/images/cpaytoday/team-img-3.png) ### Project Manager Denis ![Pavel](https://metalamp.io/images/cpaytoday/team-img-1.png) Frontend developer Pavel ![Pavel](https://metalamp.io/images/cpaytoday/team-img-1.png) Frontend developer Pavel ![Pavel](https://metalamp.io/images/cpaytoday/team-img-1.png) Frontend developer Pavel ![Alex](https://metalamp.io/images/cpaytoday/team-img-2.png) Smart-contract developer Alex ![Alex](https://metalamp.io/images/cpaytoday/team-img-2.png) Smart-contract developer Alex ![Alex](https://metalamp.io/images/cpaytoday/team-img-2.png) Smart-contract developer Alex ![Denis](https://metalamp.io/images/cpaytoday/team-img-3.png) Project Manager Denis ![Denis](https://metalamp.io/images/cpaytoday/team-img-3.png) Project Manager Denis ![Denis](https://metalamp.io/images/cpaytoday/team-img-3.png) Project Manager Denis React Interface library: the perfect solution for a component-based architecture. React Interface library: the perfect solution for a component-based architecture. React Interface library: the perfect solution for a component-based architecture. TypeScript It enhances the security of development and implementation, improving performance in high-traffic projects. TypeScript It enhances the security of development and implementation, improving performance in high-traffic projects. TypeScript It enhances the security of development and implementation, improving performance in high-traffic projects. Solidity It streamlines the creation of smart contracts, enabling developers to build decentralized applications with enhanced security and efficiency. Solidity It streamlines the creation of smart contracts, enabling developers to build decentralized applications with enhanced security and efficiency. Solidity It streamlines the creation of smart contracts, enabling developers to build decentralized applications with enhanced security and efficiency. Supported chains: ![tron-icon](https://metalamp.io/images/cpaytoday/tron-icon.svg) ![ethereum-icon](https://metalamp.io/images/cpaytoday/ethereum-icon.svg) ![binance-icon](https://metalamp.io/images/cpaytoday/binance-icon.svg) Denis Dobrovolsky Project Manager The most lengthy and unpredictable process for us was the release process in the Microsoft Store. Releasing in stores can often be challenging and time-consuming, but this time we had to re-upload the product almost 5 times, while receiving weak and opaque feedback from the Microsoft Store side. However, we still managed to do it! Denis Dobrovolsky Project Manager The most lengthy and unpredictable process for us was the release process in the Microsoft Store. Releasing in stores can often be challenging and time-consuming, but this time we had to re-upload the product almost 5 times, while receiving weak and opaque feedback from the Microsoft Store side. However, we still managed to do it! Denis Dobrovolsky Project Manager The most lengthy and unpredictable process for us was the release process in the Microsoft Store. Releasing in stores can often be challenging and time-consuming, but this time we had to re-upload the product almost 5 times, while receiving weak and opaque feedback from the Microsoft Store side. However, we still managed to do it! ## Future of the project Immediately after the release, the product was launched on Product Hunt and began attracting its first users. Currently, the product is seeking investments and partnerships with various blockchain networks. ## Future of the project Immediately after the release, the product was launched on Product Hunt and began attracting its first users. Currently, the product is seeking investments and partnerships with various blockchain networks. ## Future of the project Immediately after the release, the product was launched on Product Hunt and began attracting its first users. Currently, the product is seeking investments and partnerships with various blockchain networks. [Ready to launch your own MVP?](#modal_for_form_without_textarea) ## MetaLamp Magazine We share our expertise in the articles. You can read more about web3, blockchain and our experience. [Read more](https://metalamp.io/magazine) [Read more](https://metalamp.io/magazine) [Lees meer...](https://metalamp.io/cases/cpaytoday.md) ## MetaPool ![MetaPool](https://metalamp.io/images/cases/MetaPool.png) ![blob-1](https://metalamp.io/images/metapool/blob-1.svg) # MetaPool —  educational investment service [See all cases](https://metalamp.io/cases) ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) Hi! I'll tell you the case of a client who came to us with an idea only and had a whole project and raised an investment round. 🐝 ## About the project MetaPool is an educational service for crypto investors whose value is in pooling users' assets in order to achieve the maximum financial result from participating in token presales and managing liquidity pools. What for? To popularize the cryptocurrency and create an opportunity for a sustainable and simple income for everyone. Who for? For experienced crypto-investors who do not have either the time to select a project for investment, or do not have enough assets to fulfill the conditions of the pre-sale. ## About results ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) We did more than everything: the client initially wanted to provide us with ready-made smart contracts. But it so happened that they were written by us too. ![solidity-logo](https://metalamp.io/images/metapool/solidity-logo.svg) Smart-contracts written on Solidity ![python-logo](https://metalamp.io/images/metapool/python-logo.svg) ![django-logo](https://metalamp.io/images/metapool/django-logo.svg) Backend based on Python, Admin Panel - Django ![typescript-logo](https://metalamp.io/images/metapool/typescript-logo.svg) ![react-logo](https://metalamp.io/images/metapool/react-logo.svg) ![mobx-logo](https://metalamp.io/images/metapool/mobx-logo.svg) Frontend TypeScript, React as a default, MobX as a state-manager ![figma-logo](https://metalamp.io/images/metapool/figma-logo.svg) ![qase](https://metalamp.io/images/metapool/qase.svg) Design, testing Figma on all stages, qase.io - save and keep test-cases How long we worked on it For 3 months. In the course of work, the requirements changed, but we are satisfied with the fact that we did more than planned. How we kept in touch With a client in Telegram-chats and weekly demos. The client was actively involved in the processes, we called up several times a week. With the team - Telegram-chats and daily meetings on progress. Tasks were kept in Trello, GitHub. ![cryptogang](https://metalamp.io/images/metapool/cryptogang.png) ![landing](https://metalamp.io/images/metapool/landing 2.png) ![few-steps](https://metalamp.io/images/metapool/few-steps.png) ![metapool-page](https://metalamp.io/images/metapool/metapool-page.png) ![metapool-card](https://metalamp.io/images/metapool/metapool-card.png) ![metatrade](https://metalamp.io/images/metapool/metatrade.png) Who made it all ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![Misha](https://metalamp.io/images/metapool/michael-d.jpg) Misha tech lead ![Misha](https://metalamp.io/images/metapool/misha-yakubchuk.png) Misha frontend developer ![Igor](https://metalamp.io/images/metapool/igor-smolkov.png) Igor frontend developer ![Roma](https://metalamp.io/images/metapool/roma-yarlykov.png) Roma smart-contract developer ![Valera](https://metalamp.io/images/metapool/valera-ovsyannikov.png) Valera QA engineer ![Vlad](https://metalamp.io/images/metapool/vlad-starostenko.png) Vlad designer ![Vanya](https://metalamp.io/images/metapool/vanya-prokofiev.png) Vanya backend developer [Want to work with you](#modal_for_form_with_textarea) ![blob-2](https://metalamp.io/images/metapool/blob-2.svg) ## About a work process ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) Here is how we proceeded: - ### Gathered requirements Made ideas into tasks, dealt with restrictions. As a result, we got wireframes and technical specifications ready for development. - ### Estimated the time and cost of work Based on technical specifications developers and a designer made a plan of daily tasks. - ### Synchronized expectation We made sure that both the client and our team had the same task and restrictions view. Approved the format of work and communication. ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha flexible manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) First step was making work on design and backend to be simultaneous… ![Misha](https://metalamp.io/images/metapool/michael-d.jpg) Misha tech lead ![arrow-blue](https://metalamp.io/images/metapool/arrow-blue.svg) Sorry to interrupt, but I got carried away and did all the backend part. Although we don't have a design yet, let's show how everything works with test interface components to the customer. ![Misha](https://metalamp.io/images/metapool/misha-yakubchuk.png) Misha creative frontend developer ![arrow-light-blue](https://metalamp.io/images/metapool/arrow-light-blue.svg) No problem, I'll act as a designer for now and we'll add UI when it's ready. ## Challenge #1 GSN integrations ![Bogdan Gavrilets](https://metalamp.io/images/metapool/bogdan-gavrilets.png) Bogdan Gavrilets client, MetaPool founder ![arrow-green](https://metalamp.io/images/metapool/arrow-green.svg) Guys, we need to do something so that our clients don't worry about commissions. We didn't take this into account in the assessment. Is it possible? ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha flexible manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) Yay, it is. ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) It was not an easy task, but we finally provided clients with gasless transactions in service, used Gas Station Network solution. Here are difficulties we faced with: ![blob-3](https://metalamp.io/images/metapool/blob-3.svg) ## Challenge #1 GSN integrations - ### Token specifics "Out of the box" solution is suitable for gasless transactions with Eth in Ethereum. Our task was to provide gasless transactions with BUSD in Binance Smart Chain. The difference is that setting for native tokens (which are Eth and BNB) is easier than setting for BEP-20 (or ERC-20) tokens due to specialities of tokens themselves) - ### Few realization examples Although OpenGSN provides solutions in many EVM-compatible networks, in BSC infrastructure is not developed enough: few test servers, not all network problems are solved, few projects which can show examples "How others did it". - ### Additional estimation The sender of a transaction made through the GSN is one of the intermediary contracts of the system. In our service, it was important to keep track of which wallet a transaction was made from in order to replenish the user's balance. ![Roma](https://metalamp.io/images/metapool/roma-yarlykov.png) Roma smart-contracts master ![arrow-violet](https://metalamp.io/images/metapool/arrow-violet.svg) Here is what we did as a result: - ### Integrated GSNR contracts with the service contract system. - ### Rewrote backend logic to track gasless transactions. - ### Changed some testnet providers and GSN servers to test in different conditions. - ### For production, we raised our relay server so that everything works quickly and without errors. ![Roma](https://metalamp.io/images/metapool/roma-yarlykov.png) Roma smart-contracts master ![arrow-violet](https://metalamp.io/images/metapool/arrow-violet.svg) Thanks, I'm fine 🤖 ## Challenge #2: change of priorities ![Bogdan Gavrilets](https://metalamp.io/images/metapool/bogdan-gavrilets.png) Bogdan Gavrilets client, MetaPool founder ![arrow-green](https://metalamp.io/images/metapool/arrow-green.svg) We are going to have a recording for a foreign conference and we need to show our MVP. Can we? ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) We flexibly adapted to the changing needs of the client, because we understand what it is like to work on a startup. So we worked in short iterations, set goals based on the requirements of the client and the marketing plan. ![blob-4](https://metalamp.io/images/metapool/blob-4.svg) ## About project plans ![Dasha](https://metalamp.io/images/metapool/dasha-kiseleva.png) Dasha project manager ![arrow-pink](https://metalamp.io/images/metapool/arrow-pink.svg) We have taken an important step in the life of the service together with the client, after which further steps are expected. And we are happy to help with it. 🚀 ![roadmap](https://metalamp.io/images/metapool/roadmap-metapool.png) ![Bogdan Gavrilets](https://metalamp.io/images/metapool/bogdan-gavrilets.png) Bogdan Gavrilets client, MetaPool founder ![arrow-green](https://metalamp.io/images/metapool/arrow-green.svg) During the work the guys brought to life additional ideas for functionality, kept the process transparent and the project was ready in 3 months. This allowed me to raise the investment and now release into production is ahead. [Lees meer...](https://metalamp.io/cases/metapool.md) ## Cardano NFT-marketplace ![Cardano NFT-marketplace](https://metalamp.io/images/cases/cardano.png) # Cardano NFT-marketplace ## Partnership with IOHK [See all cases](https://metalamp.io/cases) stateTransitionCheck :: MarketplaceDatum -> MarketplaceRedeemer ->    ScriptContext -> Bool stateTransitionCheck nftStore (CreateNftRedeemer ipfsCidHash nftEntry)    ctx =      traceIfFalse "CreateNftRedeemer: " $      traceIfFalse "NFT entry already exists" $     isNothing $ AssocMap.lookup ipfsCidHash $ nftUnion nftStore ‍ [github.com...](https://github.com/input-output-hk/plutus-use-cases/) We designed and developed the first NFT marketplace on Cardano. Our main purpose was testing Plutus platform - an environment for writing smart contracts on the Cardano blockchain. ## Project team ![](https://metalamp.io/images/nft-markeplace/project-team/olga.png) [Olga](https://github.com/olgaklimenko) [![](https://metalamp.io/images/nft-markeplace/project-team/github-logo.svg)](https://github.com/olgaklimenko) Plutus engineer ![](https://metalamp.io/images/nft-markeplace/project-team/dasha.png) [Darya](https://www.linkedin.com/in/darya-trifonova-762468189/) [![](https://metalamp.io/images/nft-markeplace/project-team/in-logo.svg)](https://www.linkedin.com/in/darya-trifonova-762468189/) Project manager ![](https://metalamp.io/images/nft-markeplace/project-team/stas.png) [Stanislav](https://github.com/stanislav-az) [![](https://metalamp.io/images/nft-markeplace/project-team/github-logo.svg)](https://github.com/stanislav-az) Plutus engineer ## Technology we used - ![haskell](https://metalamp.io/images/nft-markeplace/technology/haskell.svg) ### haskell - ![purescript](https://metalamp.io/images/nft-markeplace/technology/purescript.svg) ### purescript - ![nix-os](https://metalamp.io/images/nft-markeplace/technology/nix-os.svg) ### nix-os - ![docker](https://metalamp.io/images/nft-markeplace/technology/docker.svg) ### docker ## Workflow Workflow Workflow - ### Requirements We received technical requirements from IOHK and decomposed them to small tasks to provide an approximate budget and term. - ### Process We decided to work by Time and Material because of the high level of uncertainty. Plutus platform needed to be tested, so risk of unexpectable troubles was real. - ### Communication Our developers had productive partnership with IOHK members. Our team took part in Cardano summit, some monthly updates and technical presentations. ![dasha-pixel](https://metalamp.io/images/nft-markeplace/project-team/dasha-pixel.svg) Darya Project manager I remember how excited the team was when we kicked off this project: it was a chance to deepen our expertise in Cardano blockchain, try out IPFS protocol and wrap this all up in a pretty interface. So proud to be a part of this project! ## Project's features Application works as a classic marketplace for NFT Users can: - Create their non fungible tokens - Unite cards (tokens) in collections (bundles) - Make auction - Set price and auction period - Upload images, as well as video and audio files ## The platform is monetizing through commissions from the sale of NFTs and auctions. [Have a similar project?](#modal_for_form_with_textarea) ![stas-pixel](https://metalamp.io/images/nft-markeplace/project-team/stas-pixel.svg) Stanislav Plutus engineer Every NFT creation is done in two steps, first - uploading associated metadata (this could be any file e.g. a picture) into storage, second - minting a token that goes into creators wallet on blockchain. First step requires a very important property - content addressability, this is ensured by IPFS: every file gets a unique content ID. The main purpose of the marketplace smart contract is to ensure a one to one link between a token in users wallet and that content ID. NFT marketplace app also provides user ability to list NFTs for sale or auction and bundling them up, ensuring privacy of content ID links for not listed NFTs. ## Why IOHK chosen us ![logo-iohk-color](https://metalamp.io/images/nft-markeplace/logo-iohk-color.svg) Infrastructure for Cardano smart-contracts was written in Haskell, and our team has experience in working with Haskell since 2018. ‍ This was the main reason why IOHK turned to us. Our Haskell team of experienced developers is passionate about such complex and interesting tasks, as well as constant challenges to their capabilities. We had to go through an affiliate introductory program to master the Plutus platform, take part in the research of various solutions together with the customer's team, and also work on our own solutions - create our own decentralized application on Cardano. ## Experience we received after this project - ![developing-man](https://metalamp.io/images/nft-markeplace/experience/developing-man.svg) ### Developing of decentralized applications on the Cardano (on the Plutus platform) - ![testing-man](https://metalamp.io/images/nft-markeplace/experience/testing-man.svg) ### Testing and dropping applications into the Cardano test network - ![working-together](https://metalamp.io/images/nft-markeplace/experience/working-together.svg) ### Working together with the international Haskell community and sharing experience with other Haskell engineers [Lees meer...](https://metalamp.io/cases/nft-marketplace.md)