Judge Proof
Grant-ready evidence
Live devnet state, sponsor fit, and grant narrative in one place.
Checklist
Demo Preflight
Non-mutating backend check before a judged run.
Backend
Offline
Campaign
Not initialized
Provider SOL
Unknown
RPC
Devnet
LIVE DEVNET CAMPAIGN
RTX 5080 Group Buy
FUNDED
Buyers
3/3
Locked
0.15 SOL
Required
0.15 SOL
Confirms
0/3
Program
2CvW...Xcss
Escrow PDA
Unavailable
Why Snowball Deserves Grant
Problem, working proof, partner fit, and the next build path.
1
Single thesis: consumer group-buying UX on a reusable Solana escrow primitive, with AI explaining trust and risk to non-crypto users.
2
Turns group buying into a trust-minimized checkout flow instead of a chat + bank transfer workflow.
3
Creates repeat Solana transactions: campaign creation, buyer deposit, delivery confirmation, release, and future refunds.
4
Combines consumer UX with a real escrow primitive, not just a landing page or static AI wrapper.
Dev3pack Prize Fit
Where Snowball should pull judges in during scoring.
Best Solana Consumer App
A real devnet escrow flow turns a familiar student group-buy workflow into repeat Solana transactions.
Show wallet deposit, escrow PDA, and Explorer link.
Best AI Product Layer
AI is used where buyers need it: explaining escrow state, release risk, and dispute status in plain language.
Open AI Risk Report, then ask the AI tab why seller cannot withdraw.
Best Partner Integration Story
Solana escrow, LI.FI funding preview, ElevenLabs voice path, and mobile-first UX each map to a sponsor surface.
Use Partner Fit cards and Live/Fallback/Demo-only badges.
Most Grant-Ready
Scope is honest: working devnet escrow now, with USDC vaults and on-chain dispute/refund as explicit milestones.
Show Claims We Do Not Make and Next Milestones.
Judge Pull-In Checklist
Can a judge run it in 5 minutes?
Does the demo show a real on-chain signature?
Are fallback integrations labeled honestly?
Is the next milestone fundable and specific?
Local Impact
A student-club wedge that makes the consumer escrow use case concrete.
Student clubs buy together, safely
Hardware clubs can pool deposits for GPUs, dev kits, and lab parts without one treasurer holding everyone funds.
Book and course groups can coordinate bulk orders with refund and delivery-confirmation paths.
Student trips and global hub meetups can collect deposits while keeping seller release rule-based and auditable.
Next Milestones
A focused path from hackathon proof to reusable primitive.
SPL USDC vaults and production-grade token accounting.
Seller dashboard actions for shipment evidence, refunds, and dispute response.
Reusable escrow SDK/API so other group-buying apps can launch campaigns.
Mobile wallet adapter polish and partner pilots with small sellers.
PRODUCTION ASSET
SPL USDC vault interface stub
Devnet SOL keeps the live demo fast. Production moves the same escrow lifecycle into USDC vault accounts for stable pricing, refunds, and seller settlement.
Vault mint: SPL USDC
Buyer ATA deposits
Program-owned vault PDA
Refund and release instructions
Partner Fit
Each integration maps to a Dev3pack sponsor surface.
Solana escrow
Live devnet
Wallet deposit
Live web wallet
LI.FI
Fallback route
ElevenLabs
Fallback/missing env
Dispute/refund
Demo-only state
USDC vault
Roadmap stub
Solana
Deployed Anchor escrow on devnet with real SOL deposits and release logic.
LI.FI
Cross-chain funding route is wired through the backend proxy with a demo-safe fallback.
ElevenLabs
Voice assistant screen explains escrow context and can run live when agent credentials are set.
Solana Mobile
Mobile-first escrow flow; desktop web is used for the live Phantom/Solflare signing demo.
Transaction Trail
Only real Solana signatures link to Explorer; demo events stay local.
Start the backend and press Restart Demo to load devnet transaction proof.