Скачать или смотреть 🚀 First Steps into Blockchain Privacy with v0.dev, and Windsurf AI

In this hands-on livestream, we build a fully private dApp on the COTI testnet, from scratch. You'll learn how to set up a wallet, deploy a smart contract, encrypt messages, and build a frontend with the help of AI tools like v0.dev and Windsurf.

🚀 Intro & Goals
00:00 – We’re live! Welcome to “Create. Fund. Encrypt.”
01:12 – Overview: set up wallet, deploy contract, send private messages
02:10 – Meet the team: Davi, Percival, Upendra & Joshua

🔨 Smart Contract Development with Windsurf AI
04:05 – Cloning the COTI Hardhat starter template
05:39 – Adding new methods with help from Windsurf AI
07:30 – Fixing compile errors (memory, private/public modifiers)
10:35 – Installing dependencies and compiling the contract

🌐 Deploying to COTI Testnet
12:25 – Creating a new wallet (public key, private key, AES key)
14:10 – Setting up environment variables
15:30 – Getting test tokens from Discord faucet
17:45 – Generating the AES encryption key
20:08 – Deploying the smart contract using Hardhat

💻 Building the Interface with V0.dev
22:32 – Introducing V0.dev and its role in the workflow
24:05 – Providing contract address and ABI
26:14 – Teaching V0 to use the COTI SDK (coti-ethers)
29:48 – First interface created: sending encrypted messages

🔐 Encrypting & Reading Private Messages
32:18 – Checking transactions on the block explorer
34:10 – Reading and decrypting the message
35:44 – Testing decryption with an incorrect AES key
36:57 – Validating access with the correct AES key

🛠️ Debugging & Improvements
38:45 – Refactoring wallet connection (signer + provider)
41:18 – Fixing misuse of the private key
43:02 – Improving prompts and teaching context to V0
46:00 – AI fix fails, switching to manual corrections
49:10 – Reloading previous version and verifying changes

🦊 MetaMask Integration
51:22 – Removing the private key input field from UI
52:48 – Connecting to MetaMask and setting signer
54:56 – Sending a transaction using MetaMask + encryption
56:30 – Validating message read/write with connected account
58:40 – Troubleshooting connection errors and inconsistencies

🚀 Deploying with Vercel & Wrap-up
1:01:10 – Using V0 to deploy to Vercel with one click
1:03:20 – Testing the live version in the browser
1:05:28 – Final thoughts and recap
1:06:55 – Sharing the public link
1:08:12 – What’s next: upcoming livestreams @ stay.coti.io