ZAMA

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

#1 app on Eth

Jan 26

$ committed

$121M

Uptime

100%

Expertises

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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. Avicenne embedded a dedicated frontend team directly into their codebase, from kickoff to mainnet in 10 weeks.

Background

Zama needed to launch the $ZAMA token through a sealed-bid Dutch auction — the first of its kind on Ethereum. Every bid encrypted on-chain via their own FHE technology. No prior implementation existed. Fixed, publicly announced launch date: ~10 weeks from kickoff.

Team

Avicenne embedded a dedicated frontend team directly into Zama's codebase. Day-to-day collaboration alongside their product, smart contract, and design teams. Daily standups, shared Linear board (~700 tickets), dedicated Slack channel. 1,000+ commits over 10 weeks.

Background

Zama needed to launch the $ZAMA token through a sealed-bid Dutch auction — the first of its kind on Ethereum. Every bid encrypted on-chain via their own FHE technology. No prior implementation existed. Fixed, publicly announced launch date: ~10 weeks from kickoff.

Team

Avicenne embedded a dedicated frontend team directly into Zama's codebase. Day-to-day collaboration alongside their product, smart contract, and design teams. Daily standups, shared Linear board (~700 tickets), dedicated Slack channel. 1,000+ commits over 10 weeks.

What we delivered

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)
Intermediate state to prevent gas war at results reveal

Claiming

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

challenge

Five production problems with no documented solution.

First production integration of Zama's FHEVM with a public-facing dApp. 30+ subgraph versions deployed in 6 weeks. Zero downtime.

FHE at scale.

Subgraph indexing bug.

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

Decryption queue management under peak load.

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

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

Diagnosed and patched mid-sprint with no auction disruption.

Smart wallet incompatibility.

Decryption UX.

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

Detection logic and graceful fallback built directly into the connection flow.

Every encrypted balance change required user-initiated decryption.

Batched, 7-day cached signature flow designed to reduce friction at scale.

What we delivered

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)
Intermediate state to prevent gas war at results reveal

Claiming

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

challenge

Five production problems with no documented solution.

First production integration of Zama's FHEVM with a public-facing dApp. 30+ subgraph versions deployed in 6 weeks. Zero downtime.

FHE at scale.

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

Decryption queue management under peak load.

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

Subgraph indexing bug.

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

Diagnosed and patched mid-sprint with no auction disruption.

Smart wallet incompatibility.

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

Detection logic and graceful fallback built directly into the connection flow.

Decryption UX.

Every encrypted balance change required user-initiated decryption.

Batched, 7-day cached signature flow designed to reduce friction at scale.

Results

Total Value Shielded

$121.25M

Unique Bidders

7,653

ZAMA

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

Expertises

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context

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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