Loops House
Road To Devcon - III
Smart Accounts & Gasless UX
In 2026, Ethereum turns 11. Eleven years since a genesis block turned an experiment into the base layer for a global builder economy. To mark it, we're running 11 weeks of Build Battles, one for every year of Ethereum's life, every weekend as part of Road to Devcon.
New dev challenge drops every weekend, welcome to the third chapter.
Deep in the Sahyadri ranges of Maharashtra, Warli tribal art conveys entire human stories using the simplest elements. Basic circles, triangles, and lines painted on mud walls. Without dense text or complex instructions, a single Warli canvas illustrates farming harvests, community dances, and daily life so intuitively that anyone can instantly understand it.
This weekend, builders are challenged to channel the philosophy of Warli art into decentralized application design. By leveraging Smart Accounts (ERC-4337 / AA) and Gasless UX, you will strip away the technical noise under the hood, making interacting with the blockchain as effortless, natural, and universally understandable as a line drawing on a canvas.
FAQ
Frequently asked questions
How does scoring work?
Submissions are scored by an AI judge against each problem's judging criteria. Your best problem score becomes your battle score, and ratings update once results are finalized.
Can I work in a team?
No, this is a solo build battle.
What do I need to submit?
A GitHub repository with your working project. You can keep updating your submission until the build window closes.
Final leaderboard
The Loyalty Card That Cant Be Copied - Privy embedded wallets + server-verified stamps on Base Sepolia
8 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
A bakery loyalty card that cannot be photocopied — Privy embedded wallets, server-verified identity, gasless stamps on Base Sepolia
28 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
Bakery loyalty card with Privy embedded wallet auth, server-verified stamp awards, and a redemption cycle — Road to Devcon III, Problem 1
1 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
7 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
3 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
1 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
2 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
5 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
Secure digital bakery loyalty card with Privy authentication, embedded wallets, and server-verified stamp tracking.
2 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
4 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
Devcon 3
1 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
2 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
4 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
Loyalty Card That Can't Be Copied - Road to Devcon III
1 commits1 contributorlast push Sep 5
One Tap, No Gas, No Top-UpAuthorize Once, Then Stop AskingThe Loyalty Card That Can't Be Copied
A digital loyalty card where every stamp is securely tied to your identity, so it can't be copied or faked.
3 commits1 contributorlast push Sep 5
4 commits1 contributorlast push Sep 5
Ramesh's Bakery: The Loyalty Card That Can't Be Copied
3 commits1 contributorlast push Sep 5
Secure digital bakery loyalty card with Privy authentication, embedded wallets, and server-verified stamps.
2 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
5 commits1 contributorlast push Sep 6
5 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 5
1 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
Blockchain-based project for a loyalty card (stamp rally) program
3 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 5
1 commits1 contributorlast push Sep 5
The Loyalty Card That Cant Be Copied - Privy embedded wallets + server-verified stamps on Base Sepolia
8 commits1 contributorlast push Sep 5
3 commits1 contributorlast push Sep 6
A digital loyalty card where every stamp is securely tied to your identity, so it can't be copied or faked.
3 commits1 contributorlast push Sep 5
4 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 5
Ramesh's Bakery: The Loyalty Card That Can't Be Copied
3 commits1 contributorlast push Sep 5
Secure digital bakery loyalty card with Privy authentication, embedded wallets, and server-verified stamps.
2 commits1 contributorlast push Sep 5
Bakery loyalty card with Privy embedded wallet auth, server-verified stamp awards, and a redemption cycle — Road to Devcon III, Problem 1
1 commits1 contributorlast push Sep 6
5 commits1 contributorlast push Sep 6
Secure digital bakery loyalty card with Privy authentication, embedded wallets, and server-verified stamp tracking.
2 commits1 contributorlast push Sep 6
1 commits1 contributorlast push Sep 6
A bakery loyalty card that cannot be photocopied — Privy embedded wallets, server-verified identity, gasless stamps on Base Sepolia
28 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
5 commits1 contributorlast push Sep 6
4 commits1 contributorlast push Sep 5
5 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 5
7 commits1 contributorlast push Sep 6
2 commits1 contributorlast push Sep 5
1 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
Blockchain-based project for a loyalty card (stamp rally) program
3 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
4 commits1 contributorlast push Sep 5
3 commits1 contributorlast push Sep 5
Loyalty Card That Can't Be Copied - Road to Devcon III
1 commits1 contributorlast push Sep 5
1 commits1 contributorlast push Sep 5
One-tap stablecoin checkout: ERC-4337 smart accounts, batched exact-scope approval, sponsored gas, orders as first-class records
25 commits1 contributorlast push Sep 6
One Tap, No Gas, No Top-Up — batched, sponsored stablecoin checkout with Privy smart wallets on Base Sepolia
6 commits1 contributorlast push Sep 5
9 commits1 contributorlast push Sep 6
1 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 5
4 commits1 contributorlast push Sep 5
3 commits1 contributorlast push Sep 6
Gasless one-tap checkout using Privy smart wallets — batched approve+transfer in a single sponsored send — Road to Devcon III, Problem 2
2 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 6
One-tap stablecoin checkout using Privy Smart Accounts and gas sponsorship on Base Sepolia.
3 commits1 contributorlast push Sep 6
6 commits1 contributorlast push Sep 6
6 commits1 contributorlast push Sep 6
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Authorize Once, Then Stop Asking — scoped, revocable server-side wallet access with Privy session signers and a default-deny policy engine
7 commits1 contributorlast push Sep 5
Savings circle with a one-time Privy delegated-actions grant, policy-enforced weekly contributions, and durable idempotency — Road to Devcon III, Problem 3
3 commits1 contributorlast push Sep 6
Authorise once, contribute weekly while offline — Privy session signers bound to a default-deny wallet policy, idempotent scheduled collection on Base Sepolia
32 commits1 contributorlast push Sep 6
Weekly stablecoin contributions with scoped, revocable Privy wallet authorization.
3 commits1 contributorlast push Sep 6
11 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 6
1 commits1 contributorlast push Sep 6
5 commits1 contributorlast push Sep 6
10 commits1 contributorlast push Sep 5
9 commits1 contributorlast push Sep 6
3 commits1 contributorlast push Sep 5
2 commits1 contributorlast push Sep 6
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