ZAMA Auction

Ethereum's first encrypted token auction, in 10 weeks.

#1 app on Eth

Jan 26

$ committed

$121M

Uptime

100%

Expertises

stack

Next.JS

Nest.JS

role

Front-end

Back-end

Web3 integrations

context

Zama needed to launch the $ZAMA token through a sealed-bid Dutch auction — the first of its kind on Ethereum, where every bid is encrypted on-chain using their own FHE technology.

Background

Zama needed to launch the $ZAMA token through a sealed-bid Dutch auction — the first of its kind on Ethereum — with FHE-encrypted bidding, global KYC/KYB gating, multi-platform settlement, and a full claiming flow. Fixed, publicly announced launch date. 10 weeks from kickoff to mainnet.

Team

Avicenne embedded a dedicated frontend team directly into Zama's codebase, working day-to-day alongside their product, smart contract, and design teams. Daily standups, shared Linear board (~700 tickets), dedicated Slack channel.

Background

Zama needed to launch the $ZAMA token through a sealed-bid Dutch auction — the first of its kind on Ethereum — with FHE-encrypted bidding, global KYC/KYB gating, multi-platform settlement, and a full claiming flow. Fixed, publicly announced launch date. 10 weeks from kickoff to mainnet.

Team

Avicenne embedded a dedicated frontend team directly into Zama's codebase, working day-to-day alongside their product, smart contract, and design teams. Daily standups, shared Linear board (~700 tickets), dedicated Slack channel.

Focus area

Registration

In-app and standalone KYC via Sumsub
On-chain wallet whitelisting
Country sanctions enforcement

Bidding

USDT → cUSDT shielding
FHE-encrypted sealed bids
Up to 10 concurrent bids per wallet
Live aggregate bid distribution
Real-time TVS counter

Settlement

Live UI tied to smart contract state
Multi-platform bid ingestion (CoinList + KuCoin)

Claiming

Personalized results page
Two-step claim/refund flow
Bonus distribution (OG NFT, referral, Bron wallet)
Pro-rata allocation at clearing price

challenge

Ethereum's first encrypted public auction.

First production integration of Zama's FHEVM with a public-facing dApp. Several problems had no documented solution.

FHE at scale.

Subgraph indexing bug.

Coordination with Zama's relayer on rate limits and Cloudflare IP whitelisting.

Decryption queue management under peak load.

Hex-encoded bid IDs jumped from 0x7F to 0x8000 at the 128-bit boundary, breaking bid matching.

Diagnosed and patched mid-sprint.

Smart wallet incompatibility.

Gas war prevention.

Account-abstraction wallets (SAFE, Base) silently failed FHE operations.

Detection and graceful fallback built into the connection flow.

Intermediate state introduced between Settlement and Claiming to prevent a gas spike the moment results went live.

Decryption UX.

Every encrypted balance change required user-initiated decryption.

Batched, 7-day cached signature flow designed to reduce friction across the entire claiming experience.

Focus area

Registration

In-app and standalone KYC via Sumsub
On-chain wallet whitelisting
Country sanctions enforcement

Bidding

USDT → cUSDT shielding
FHE-encrypted sealed bids
Up to 10 concurrent bids per wallet
Live aggregate bid distribution
Real-time TVS counter

Settlement

Live UI tied to smart contract state
Multi-platform bid ingestion (CoinList + KuCoin)

Claiming

Personalized results page
Two-step claim/refund flow
Bonus distribution (OG NFT, referral, Bron wallet)
Pro-rata allocation at clearing price

challenge

Ethereum's first encrypted public auction.

First production integration of Zama's FHEVM with a public-facing dApp.

FHE at scale.

Coordination with Zama's relayer on rate limits and Cloudflare IP whitelisting.

Decryption queue management under peak load.

Smart wallet incompatibility.

Account-abstraction wallets (SAFE, Base) silently failed FHE operations.

Detection and graceful fallback built into the connection flow.

Gas war prevention.

Intermediate state introduced between Settlement and Claiming to prevent a gas spike the moment results went live.

Decryption UX.

Every encrypted balance change required user-initiated decryption.

Batched, 7-day cached signature flow designed to reduce friction across the entire claiming experience.

Results

Total Value Shielded

$121.25M

Unique Bidders

7,653

ZAMA Auction

Ethereum's first encrypted token auction, in 10 weeks.

Expertises

Category

stack

role

context

Heading

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Building the fastest marketplace involves solving challenges of scalability, real-time performance, and secure financial transactions. Gamification features add complexity, requiring seamless integration while maintaining speed and security.

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Building the fastest marketplace ever lzlzlzlzlzlz

Building the fastest marketplace involves solving challenges of scalability, real-time performance, and secure financial transactions. Gamification features add complexity, requiring seamless integration while maintaining speed and security.

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Results

Total Value Shielded

Unique Bidders