Is a smart contract audit mandatory before launch?

For production - absolutely yes. If there is a bug in a smart contract, it can lead to user fund loss and project reputation damage. Even experienced developers request audits from independent specialists because a fresh perspective finds what the author missed. For testnets and MVPs, you can manage with internal review, but before mainnet deployment you need a professional audit.

How long does Web3 application development take?

A simple contract with frontend interface can be developed in 2-3 months. More complex systems with multiple contracts, integrations, and thoughtful architecture require 4-8 months. This doesn't include audit time - that's an additional 2-4 weeks. The main factor is not code volume but quality of requirements at the start: clear description of functionality and risks significantly speeds up development.

Which blockchain network should I choose for my project?

The choice depends on your priorities. Ethereum is the most reliable and decentralized, but fees are higher. Polygon offers low fees and Ethereum compatibility. Solana provides high speed and low fees, but with more risks. For learning and testing, start with testnets - they're free and identical to production networks except the money is fake.

How much does it cost to deploy a smart contract to mainnet?

Deployment cost depends on contract size and current network activity. On Ethereum, it could be $5-60 per operation. On Polygon - $0.15-1.50. These are not one-time costs - each operation in a smart contract requires gas, so you need to budget for ongoing blockchain interaction as your application runs.

Building a Web3 Product: Where to Start and How to Avoid Mistakes

What counts as Web3 development

Web3 development covers several areas that are often confused with each other. It is not just about writing smart contracts - programs that run directly in the blockchain - but also developing a frontend to interact with them, creating wallets, setting up on-chain logic, and integrating with different blockchain networks. Each of these areas has its own tools, challenges, and security requirements. When building a Web3 application, you may need both a frontend specialist for the interface and a blockchain developer for smart contracts, and these are not the same skillset.

How to start developing a Web3 application

The first step is to clearly define the use case for your product. What exactly should your application do? Why do you need blockchain - for decentralization, transparency, tokenization, or asset management? This clarity helps you choose the right network: Ethereum for classic smart contracts, Solana for high-performance systems, Polygon for cost-effective solutions, or other chains depending on your requirements. Choosing a network is not just a technical decision; it affects transaction costs, processing speed, and the developer ecosystem that will help you.

Smart contract audits - not expenses, but investment

After writing a smart contract, a professional audit by specialized firms or experienced developers is mandatory. This is not optional, because errors in smart contracts are irreversible - if a bug allows attackers to steal funds, recovery is nearly impossible. An audit can cost anywhere from $5,000 to $50,000 depending on contract complexity, but the price of not auditing can be much higher. There are documented cases where functional applications lost millions due to a single code error that a professional audit would have easily caught.

Development costs and hidden expenses

The budget for a Web3 product depends on scope. A simple Web3 application with one smart contract can launch for $300-600 if you use templates and test networks. A full-featured application with multiple contracts, frontend interface, and its own token requires $3,000-15,000. But there are hidden costs: deploying a contract requires gas - blockchain transaction fees that can be significant when network activity is high, testing takes time, and fixing errors after launch is very expensive. Additionally, you need ongoing security updates and monitoring for potential vulnerabilities in your code after deployment.

How S2 Digital helps with Web3 projects

S2 Digital offers end-to-end Web3 product development - from architecture consultation and network selection, through smart contract and frontend development, to organizing professional audits and deployment. Our team is honest about risks, doesn't oversell services, and focuses on long-term partnerships. We've worked with projects from concept to mainnet launch, helped avoid common mistakes, and taught clients how to manage their on-chain infrastructure independently. If you want to not just launch an application but build a reliable and secure system that will serve for years - this is our specialty.