02. 🧠 What is a smart contract and how does it work in Ethereum?

🚨 Gate Alpha Ambassador Recruitment is Now Open!
📣 We’re looking for passionate Web3 creators and community promoters
🚀 Join us as a Gate Alpha Ambassador to help build our brand and promote high-potential early-stage on-chain assets
🎁 Earn up to 100U per task
💰 Top contributors can earn up to 1000U per month
🛠 Flexible collaboration with full support
Apply now 👉 https://www.gate.com/questionnaire/6888

🔥 Gate Square #Gate Alpha Third Points Carnival# Trading Sharing Event - 5 Days Left!
Share Alpha trading screenshots with #Gate Alpha Trading Share# to split $100!
🎁 10 lucky users * 10 USDT each
📅 July 4, 4:00 – July 20, 16:00 UTC+8
Gate Alpha 3rd Points Carnival Issue 10 is in full swing!
Trade and post for double the chances to win!
Learn more: https://www.gate.com/campaigns/1522alpha?pid=KOL&ch=5J261cdf

📢 Gate has released its latest Proof of Reserves report!
As of July 11, 2025:
💰 Total reserves reached $10.504 billion
📈 Reserve ratio stands at 126.03%
✅ Covers over 350 types of user assets
🔼 Surplus reserves increased 10.66% to $2.17 billion
Committed to transparency and user fund security.
📎 Learn more: https://www.gate.com/proof-of-reserves

🎉 [Gate 30 Million Milestone] Share Your Gate Moment & Win Exclusive Gifts!
Gate has surpassed 30M users worldwide — not just a number, but a journey we've built together.
Remember the thrill of opening your first account, or the Gate merch that’s been part of your daily life?
📸 Join the #MyGateMoment# campaign!
Share your story on Gate Square, and embrace the next 30 million together!
✅ How to Participate:
1️⃣ Post a photo or video with Gate elements
2️⃣ Add #MyGateMoment# and share your story, wishes, or thoughts
3️⃣ Share your post on Twitter (X) — top 10 views will get extra rewards!
👉