In the first week of the second phase of the Eth India Fellowship, I and my teammate dedicated our time to creating project proposals. We started by brainstorming and researching potential solutions to tackle the issues faced by users of blockchain technology. From this process, they generated several ideas, such as an automated deposit loop strategy for Aave, social recovery methods for smart contract-based wallets, and a Proof of Liveness check for NFT minting. After presenting our ideas to the mentors and other fellows, we decided to focus on ShardSafe, a decentralized and trustless platform that utilizes sharding technology to provide social recovery mechanisms for smart contract-based wallets. We believed that ShardSafe would be able to tackle the issues linked with conventional key management and recovery services, including centralization, lack of privacy, and susceptibility to fraud.

https://www.notion.so/Project-Proposal-41c424609ccd4047932a8b1f7075b1a8

Once we had finalized the project proposal for ShardSafe, our team moved on to the development phase. Initially, we identified the necessary features and functionalities, with a particular focus on ensuring the platform was resistant to collusion. To guarantee the platform's security, we introduced a modified Shamir secret algorithm (n,t). Alongside this, we began working on an off-chain solution to divide sensitive information, such as private keys, into several fragments, which we planned to distribute to trusted human social accounts, which we called Guardians.

During the final two weeks of our fellowship, we progressed significantly with the development of ShardSafe - our blockchain-based platform. To enhance the security of our users' data, we introduced additional features such as cloud storage and encryption and developed a new process for users to enable recovery with iCloud/Google Drive. By combining encryption and cloud storage, we have provided our users with an extra layer of protection against potential attacks. Our platform offers a decentralized and trustless solution to key management and recovery, which is crucial for addressing the challenges faced by users of blockchain technology. Our ultimate goal is to extend this solution to various wallet companies, providing users additional security and protection.

Overall this is amazing for me.

Nitesh Kumar Kushwaha

EthIndia Fellow’23

https://github.com/scaffold-eth/scaffold-eth-challenges/tree/challenge-5-multisig

In the second project of the week, I constructed an NFT using SVG called "Etherage" which showed how much time had passed since the creator's initial Ethereum transaction. The NFT relied on SVG and the etherscan API to function as proof-of-age. This undertaking provided me with valuable insight into the tools and technologies used in NFT creation. Additionally, I was intrigued by the numerous applications of NFTs, such as age verification on the Ethereum blockchain. All in all, developing this NFT was an enthralling and enlightening experience for me.

https://github.com/scaffold-eth/scaffold-eth-challenges/tree/challenge-6-svg-nft

Overall this week is amazing for me.

Nitesh Kumar Kushwaha

EthIndia Fellow’23

Challenge # Dex:

https://speedrunethereum.com/challenge/minimum-viable-exchange

During this challenge at the Ethereum India Fellowship'23, participants were tasked with building a Minimum Viable Exchange (MVE) or a DEX from scratch. This challenge was especially exciting as it allowed participants to delve into DeFi, a rapidly growing field in blockchain technology. To successfully complete the challenge, participants had to write a smart contract that was secure, efficient, and could handle different types of orders, and build a front-end user interface. This project provided the participants with a deep understanding of decentralized exchanges, how they work, and the challenges that come with building them, such as handling liquidity, preventing front-running, and ensuring security.

https://github.com/Nitesh639/scaffold-eth-challenges/tree/challenge-4-dex

Challenge #Building a State Channel Application:

https://speedrunethereum.com/challenge/state-channels

During this challenge at the Ethereum India Fellowship'23, participants were introduced to state channels, a layer two scaling solution that allows for off-chain transactions without the need for every transaction to be validated by the blockchain network. In this challenge, participants had to create an application that uses state channels to facilitate transactions between a guru and their clients. They had to write a smart contract that could handle opening and closing state channels, validating signed messages, and building a front-end user interface. This project provided the participants with valuable insights into ECDSA and the benefits of state channels, such as faster and cheaper transactions, improved scalability, and increased privacy.

https://github.com/Nitesh639/scaffold-eth-challenges/tree/challenge-9-state-channels

Project Proposal:

I also created my project proposal this week. During this fellowship, I want to build something in the Social Impact category. This is a DeFi project based on ROSCA(Rotating Savings And Credit Association). In this project, a group of people agrees to save collectively and a chainlink random VRF will choose a person one from them every month who accesses the whole pool of money for that month. So, everyone gets access to a big amount of money randomly each month. If a person gets money then he/she would not be allowed to participate further and they will have to pay interest on that amount as per the rule mentioned in the smart contract. So if a person pays money every month he/she will earn interest on that money as well as a person who gets a pool of money early pays interest hence it is also a nice investing scheme for the user.

https://github.com/Nitesh639/EIF3.0

Overall this week is amazing for me.

Nitesh Kumar Kushwaha

EthIndia Fellow’23

Challenge #Dice game

I started this week with the Challenge 3 #Dice game. In this game, I got to learn about how in blockchain we produce random numbers, this game uses a special kind of dice to generate these numbers.

https://speedrunethereum.com/challenge/dice-game

In this, I want to highlight the challenges of using randomness on a public deterministic blockchain. While the block hash is a commonly used method for generating randomness, it is not very secure and can be easily exploited. In this, I provide an example of a contract that uses block hash to create random numbers and explain why this method is weak. Instead, I suggest using stronger forms of randomness, such as commit/reveal schemes, oracles, or VRF from Chainlink, to ensure the security of the blockchain.

https://github.com/Nitesh639/scaffold-eth-challenges/tree/challenge-3-dice-game

Overall, the week was full of great learning, and hope to learn even more exciting things in the future!

Nitesh Kumar Kushwaha

EthIndia Fellow’

During Week 3 of the Ethereum India Fellowship'23, participants were given a range of challenges that helped them gain new knowledge and experience in the field of blockchain technology. I have not completed last week's challenges, So I went throw those challenges. These challenges encouraged participants to explore different aspects of blockchain technology and push their boundaries, providing them with valuable learning opportunities.

Challenge 1 #Decentralized Staking App :

https://speedrunethereum.com/challenge/decentralized-staking

The challenge of creating a decentralized staking app was an incredibly interesting and educational experience for me. Writing the smart contract from scratch was a thrilling endeavor, and I felt a sense of accomplishment when all my test cases passed. This challenge pushed me to think critically and creatively, and I was proud of the work I accomplished. Through this experience, I learned how to create a staking mechanism that incentivizes users to hold onto their tokens and receive rewards for doing so. This challenge was a powerful example of how decentralized technology has the potential to revolutionize traditional processes, and I'm excited to see how this technology will continue to evolve and transform the way we do things.

https://github.com/Nitesh639/scaffold-eth-challenges/tree/challenge-1-decentralized-staking

Challenge 2 #Token Vendors :

https://speedrunethereum.com/challenge/token-vendor

During the challenge, I learned that smart contracts can be compared to "always on" vending machines that anyone can access. For my project, I created a decentralized digital currency and built a vending machine that can buy and sell it without any interruptions. I gained valuable knowledge on the "approve" pattern for ERC20s and how contract-to-contract interactions work. Overall, this challenge provided me with an excellent opportunity to explore the possibilities of smart contracts and the vast potential they have to revolutionize various industries.

https://github.com/Nitesh639/scaffold-eth-challenges/tree/challenge-2-token-vendor

Nitesh Kumar Kushwaha

EthIndia Fellow’23

The week started with Challenge 1 #Decentralized Staking App. In this assignment, I needed more knowledge about Solidity. So this week I go through the basics of Solidity. I learned about events, transfers, payables, etc., which are very helpful for blockchain developers. I used Remix to compile and deploy the smart contracts.

Overall, the week was full of great learning, and hope to learn even more exciting things in the future!

Nitesh Kumar Kushwaha

EthIndia Fellow’23

Then, I attended an electric kick-off session at the Ethereum India Fellowship 3.0, setting the stage for what was to come. During this session, the program leaders introduced the fellowship structure and guidelines, and I felt optimistic about the upcoming weeks. The program leaders stressed the significance of collaboration, growth, and the impact we can have on the Ethereum ecosystem. Their passion and knowledge were evident, and it was apparent that they were dedicated to our success.

During the initial week of the Ethereum India Fellowship 3.0, we attended numerous sessions as part of the EthForAll hackathon. These sessions presented us with an excellent chance to collaborate with other fellows and work on thrilling projects. Despite the difficulty, I enjoyed the sessions and found them to be a significant learning experience that aided in my personal growth. I was astounded by how much I was able to achieve within a brief period and looked forward to exploring what the program had in store for me in the future.

One of the most remarkable moments of the week was when we received two EthereumSpeedRrun challenges: a basic NFT example and a decentralized staking app. These challenges gave us the chance to utilize our knowledge and demonstrate our abilities. Initially, I was apprehensive about creating a decentralized application from the ground up, but I was excited to accept the challenge.

The week I started with Challenge 0 #Simple NFT Challenge. We used Hardhat to compile and deploy the smart contracts. Then, we used a template React app full of important Ethereum components and hooks. I also got acquainted with the use, implementation, and market of NFTs.

Important Links:

• GitHub Repo

• Assignment Link

Nitesh Kumar Kushwaha,

EthIndia Fellow 3.0