I Built a Crypto-Native Craigslist with Manual Escrow — Here's Why and How

#web3 #cryptocurrency #javascript #startup

The Problem

There are millions of people holding crypto who want to spend it on real things —
hire a developer, buy a script, sell design work. But where do they go?

Telegram OTC chats → chaotic, no protection, scam-heavy
Forum classifieds → threads get buried in hours
P2P exchange sections → designed for fiat conversion, not commerce

I decided to build a dedicated marketplace for this.

What I Built

CryptoBoard — a classifieds platform with Web3 wallet authentication.

🔗 https://crypto.my-board.org/

Tech decisions:

Auth: Wallet-only (MetaMask, Trust Wallet, WalletConnect). No backend user database with emails and passwords to get hacked.
Listings: Icon-based instead of user-uploaded images. Keeps the UI clean and avoids the "flea market" look.
Messaging: Built-in chat between buyers and sellers.
Escrow: This is the interesting part (see below).

The Escrow Problem with Digital Goods

Traditional escrow works like this:

Buyer sends money to escrow
Seller delivers product
Buyer confirms → escrow releases money

But with digital goods (source code, design files), step 3 is broken:

The buyer can receive the files, say "this isn't what I wanted," request a refund, and keep a copy
The seller has no recourse
The escrow service has no way to verify the claim

My Solution: Human-Powered Escrow

Instead of just holding funds, the platform admin becomes an active verifier:

Seller sends product + testing instructions to admin
Admin installs/runs the product on their own machine
Admin performs agreed-upon tests and records a screencast
Buyer watches the screencast — verified by a neutral party, not the seller
If satisfied, buyer sends crypto directly to seller
Admin verifies the on-chain transaction
Admin delivers files to buyer
Admin deletes all copies (per agreement)

Is it scalable? Probably not infinitely. But for high-value digital transactions
($100–$10,000+), having a human in the loop is actually a feature, not a bug.

Design Philosophy

I deliberately chose not to allow user-uploaded images. Every listing uses icons
from a built-in collection.

Why? Because user-uploaded photos on classifieds boards almost always look terrible —
blurry phone photos, inconsistent sizes, stock images. Icons keep everything uniform
and scannable.