One significant challenge was the imposition of gas fees for every transaction on the Ethereum network, so even creating a simple shared wallet or depositing ETH in shared wallet would mean spending some amount of gas fees. To address this, we implemented off-chain functions, allowing us to store a reserve of funds in the contract. This reserve covered the gas fees, ensuring a seamless user experience without requiring participants to pay fees for every transaction

Another problem was that we wanted to create shared wallets with a simple and user-friendly experience, similar to creating a WhatsApp group, posing a challenge in terms of logic and simplicity. To overcome this hurdle, we opted for a centralized approach, consolidating all funds within one smart contract. We maintained off-chain balances, providing a straightforward and accessible mechanism for users to create and manage shared wallets effortlessly.