Viral NFT Collection
10,000 unique viral strains minted on-chain. Each NFT encodes a distinct Hantavirus mutation— from dormant Carriers to catastrophic Pandemic Legends. Your rarity determines your infection power.
HANTA is a generative NFT experiment that maps the lifecycle of the Hantavirus onto the Ethereum blockchain. Each of the 10,000 NFTs represents a unique viral particle — algorithmically assembled from hundreds of biological trait combinations.
The rarer your strain, the higher its simulated Infection Rate (IR) — a core stat encoded in every token's metadata. High-IR holders gain priority access to future drops, DAO votes, and exclusive events.
This is not just art. It is a living simulation of viral propagation recorded permanently on-chain. Every mint is an outbreak. Every wallet is a host.
Each NFT's traits — Spike Protein, Capsid Shell, Replication Rate, Host Range, Mutation Index — are generated at mint and stored immutably. No two strains are identical. The algorithm guarantees biological plausibility within its rarity tier.
Rarity is revealed post-mint. Infection rate encoded at genesis block.
Every HANTA NFT belongs to one of four viral tiers. The rarer the strain, the higher its Infection Rate — and the greater its power within the HANTA ecosystem.
HANTA is a 10,000-piece generative NFT collection deployed on Ethereum Mainnet as an ERC-721 contract. The collection translates the biological properties of the Hantavirus — a zoonotic RNA pathogen — into immutable on-chain metadata. Each token encodes a complete viral profile: spike morphology, replication speed, host range, capsid stability, and a composite Infection Rate (IR) score. IR score is the primary utility metric governing access, governance weight, and future ecosystem benefits. Rarity tiers mirror real-world viral virulence classes: Common (Carrier), Uncommon (Symptomatic), Rare (Acute HPS), and Legend (Pandemic Strain).
Generative NFT collections have historically treated rarity as an aesthetic variable — a cosmetic layer with no structural significance. HANTA proposes a different model: biological rarity as on-chain utility. Every trait combination in the HANTA collection is derived from a real virology framework, and the resulting IR score is encoded at mint time using Ethereum block entropy, making it provably fair and permanently verifiable.
The collection exists at the intersection of computational biology, generative art, and decentralized ownership. It is not a promise of financial return. It is a simulation — a digital pandemic recorded block by block on the Ethereum ledger.
Hantaviruses (family Hantaviridae) are enveloped, single-stranded, negative-sense RNA viruses. Unlike most zoonotic pathogens, they do not require an arthropod vector — transmission occurs directly via inhalation of aerosolized rodent excreta. Two clinically significant syndromes are documented:
| Syndrome | Causative Strain | Region | CFR |
|---|---|---|---|
| HPS — Hantavirus Pulmonary Syndrome | Sin Nombre, Andes | Americas | 30–40% |
| HFRS — Hemorrhagic Fever with Renal Syndrome | Hantaan, Seoul, Puumala | Europe / Asia | 1–15% |
The HANTA NFT rarity system maps directly to these virulence profiles. Common tokens correspond to subclinical carrier states. Legend tokens represent hypothetical airborne pandemic-level strains — the theoretical apex of Hantavirus evolution.
Each HANTA token is generated deterministically at mint time. The generation seed is derived from a combination of the minting transaction's Ethereum block hash and the caller's address, ensuring no party — including the contract deployer — can predict or manipulate trait outcomes.
| Trait | Description | Values |
|---|---|---|
| Spike Protein | Surface glycoprotein morphology. Determines cell binding affinity. | 12 variants |
| Capsid Shell | Viral envelope structure. Affects environmental persistence. | 8 variants |
| Replication Mode | RNA polymerase efficiency class. | 6 variants |
| Host Range | Susceptible cell type count. | 5 tiers |
| Mutation Index | Probability of evolution in future seasons. | Continuous 0–1 |
| Transmission Vector | Aerosol, contact, or hypothetical airborne. | 3 types |
Traits are stored entirely on-chain as ERC-721 metadata. No external API, no IPFS dependency for core attributes. The trait hash is embedded in the token URI at generation time.
The Infection Rate is a composite virulence score in the range [0, 99], computed at mint from the token's biological traits using a weighted linear model:
| Variable | Component | Weight | Range |
|---|---|---|---|
S |
Spike Protein binding score | 30% | 0–99 |
R |
Replication Speed Index | 25% | 0–99 |
H |
Host Range coefficient | 20% | 0–99 |
C |
Capsid Stability score | 15% | 0–99 |
M |
Mutation Index | 10% | 0–99 |
IR scores above 80 are exclusive to Rare and Legend tiers, enforced by the trait weight distributions in each tier's pool. The IR score is immutable after mint — no upgrading, no rerolling. The blockchain is the final arbiter.
| Tier | Name | Supply | Share | IR Range | Syndrome |
|---|---|---|---|---|---|
| Common | Carrier | 5,500 | 55% | 5–20 | Asymptomatic |
| Uncommon | Symptomatic | 2,800 | 28% | 25–55 | Fever / HPS onset |
| Rare | Acute Strain | 1,200 | 12% | 60–80 | Full HPS / HFRS |
| Legend | Pandemic Strain | 500 | 5% | 85–99 | Hypothetical airborne |
Tier assignment is a consequence of IR score, not a separate random draw. Tokens that score below IR 21 are classified Common; 21–59 Uncommon; 60–84 Rare; 85+ Legend. The distribution is probabilistic but converges to the target ratios over 10,000 mints by design of the trait weight tables.
Mint price is fixed at 0.002 ETH per token with a maximum of 100 tokens per wallet per transaction. There is no bonding curve, no Dutch auction, no allowlist gating. Supply is first-come, first-served. Total mint revenue: up to 20 ETH at full sell-out.
Voting power within the HANTA DAO is IR-weighted. A holder's governance score is the sum of IR scores across all HANTA tokens in their wallet. Legend holders receive a 2× multiplier on their base IR score. Rare holders receive 1.5×.
Trait generation uses Ethereum block hash entropy combined with the minter's address as a pseudo-random seed. This approach is sufficient for NFT trait assignment — it is not gameable in practice due to the cost of block manipulation on Ethereum mainnet exceeding the value of any single mint.
The ERC-721 V4 contract is non-upgradeable. No proxy pattern. Owner functions are limited to: withdrawing mint revenue, pausing mint in emergency, and setting the base URI once. Metadata is frozen post-reveal. No admin can alter a token's traits after generation.
The contract is built on OpenZeppelin v5 ERC-721 base. All transfer functions follow the Checks-Effects-Interactions pattern. Integer arithmetic uses Solidity 0.8.x native overflow protection.
| Parameter | Value |
|---|---|
| Blockchain | Ethereum Mainnet (Chain ID: 1) |
| Token Standard | ERC-721 (OpenZeppelin v5) |
| Solidity Version | 0.8.24 |
| Total Supply | 10,000 (hard cap, immutable) |
| Mint Price | 0.002 ETH per token |
| Max Per Wallet | 100 tokens per transaction |
| Secondary Royalty | 5% → DAO Treasury multi-sig |
| Metadata Storage | IPFS (assets) + on-chain trait hash |
| Randomness | Ethereum block hash + msg.sender XOR seed |
| Marketplace | OpenSea ↗ |
| Wallet Support | MetaMask, Coinbase Wallet, WalletConnect |