The latest articles on DEV Community by crypto_b (@dimabsvg). https://dev.to/dimabsvg https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4069114%2Fa848c25e-10e3-4842-adc3-fd76a5beeb2b.jpg https://dev.to/dimabsvg en crypto_b Sat, 08 Aug 2026 18:50:58 +0000 https://dev.to/dimabsvg/i-built-a-crypto-native-craigslist-with-manual-escrow-heres-why-and-how-4j8b https://dev.to/dimabsvg/i-built-a-crypto-native-craigslist-with-manual-escrow-heres-why-and-how-4j8b <h2> The Problem </h2> <p>There are millions of people holding crypto who want to spend it on real things —<br> hire a developer, buy a script, sell design work. But where do they go?</p> <ul> <li>Telegram OTC chats → chaotic, no protection, scam-heavy</li> <li>Forum classifieds → threads get buried in hours</li> <li>P2P exchange sections → designed for fiat conversion, not commerce</li> </ul> <p>I decided to build a dedicated marketplace for this.</p> <h2> What I Built </h2> <p><strong>CryptoBoard</strong> — a classifieds platform with Web3 wallet authentication.</p> <p>🔗 <a href="https://crypto.my-board.org/" rel="noopener noreferrer">https://crypto.my-board.org/</a></p> <h3> Tech decisions: </h3> <ul> <li> <strong>Auth</strong>: Wallet-only (MetaMask, Trust Wallet, WalletConnect). No backend user database with emails and passwords to get hacked.</li> <li> <strong>Listings</strong>: Icon-based instead of user-uploaded images. Keeps the UI clean and avoids the "flea market" look.</li> <li> <strong>Messaging</strong>: Built-in chat between buyers and sellers.</li> <li> <strong>Escrow</strong>: This is the interesting part (see below).</li> </ul> <h2> The Escrow Problem with Digital Goods </h2> <p>Traditional escrow works like this:</p> <ol> <li>Buyer sends money to escrow</li> <li>Seller delivers product</li> <li>Buyer confirms → escrow releases money</li> </ol> <p>But with digital goods (source code, design files), step 3 is broken:</p> <ul> <li>The buyer can receive the files, say "this isn't what I wanted," request a refund, and <strong>keep a copy</strong> </li> <li>The seller has no recourse</li> <li>The escrow service has no way to verify the claim</li> </ul> <h2> My Solution: Human-Powered Escrow </h2> <p>Instead of just holding funds, the platform admin becomes an active verifier:</p> <ol> <li>Seller sends product + testing instructions to admin</li> <li>Admin installs/runs the product on their own machine</li> <li>Admin performs agreed-upon tests and records a screencast</li> <li>Buyer watches the screencast — verified by a neutral party, not the seller</li> <li>If satisfied, buyer sends crypto directly to seller</li> <li>Admin verifies the on-chain transaction</li> <li>Admin delivers files to buyer</li> <li>Admin deletes all copies (per agreement)</li> </ol> <p><strong>Is it scalable?</strong> Probably not infinitely. But for high-value digital transactions<br> ($100–$10,000+), having a human in the loop is actually a feature, not a bug.</p> <h2> Design Philosophy </h2> <p>I deliberately chose <strong>not</strong> to allow user-uploaded images. Every listing uses icons<br> from a built-in collection.</p> <p>Why? Because user-uploaded photos on classifieds boards almost always look terrible —<br> blurry phone photos, inconsistent sizes, stock images. Icons keep everything uniform<br> and scannable.</p> <h2> Try It </h2> <p>The site is live. If you have a Web3 browser wallet, you can:</p> <ul> <li>Connect and browse listings</li> <li>Create your own listing</li> <li>Message other users</li> </ul> <p>🔗 <a href="https://crypto.my-board.org/" rel="noopener noreferrer">https://crypto.my-board.org/</a></p> <p>I'd love to hear your feedback — especially on the escrow model and the no-images<br> design decision.</p> web3 cryptocurrency javascript startup