One of the biggest challenges was integrating Sui Move smart contracts with the Next.js frontend.
Unlike Ethereum, the Sui ecosystem has fewer ready-made examples and limited developer documentation, so figuring out the contract deployment and frontend calls required extensive testing.

Another challenge was setting up the escrow logic so payments could only be released when milestones were met. This required careful handling of Move’s resource-oriented programming model to ensure funds could not be double-spent or withdrawn early.

We also faced wallet integration issues since we initially used a mock wallet. Migrating to a real Sui wallet with @mysten/dapp-kit involved debugging connection errors and ensuring transactions were properly signed and sent on-chain.

We overcame these challenges by:

Reviewing Sui Move’s official tutorials and code examples.

Running multiple local tests with the Sui CLI before deploying to testnet.

Using community Discord channels to get advice from experienced Sui developers.

Iteratively refining our smart contract logic until it passed all functional tes