HashFly

Nothing here is sold ready-made

A single ERC-721 on Arc. The only way a token comes into existence is a hash below the current target, paid for at the entry price of the current epoch. The hash then becomes the seed the picture is drawn from — wings, eyes, antenna, the thing in the fly's grip — derived by the contract, identically, forever.

Four values, one hash, one comparison

keccak256( minerAddress, nonce, prevFlyHash, anchor )  <  target

From work to picture

seed = keccak256( workHash, timeBucket )   // the clock rounded down to 5 minutes

Inside one bucket the answer does not move, and a solution only lives until the next mint or the end of the anchor window. That is what makes grinding for a rare fly pointless.

Difficulty is six rules, not one number

The streak does not stop a farm. Nothing here does — the algorithm is public and anyone can write a native miner. What the streak does is price the pace: taking the collection quickly costs far more than taking it slowly.

The price is derived, not chosen

The entry price equals the number of tokens that existed at the start of the current epoch, times a fixed step of 0.12 USDC. It is flat inside an epoch and changes only at the border, so the price cannot move under you while you are searching. There is no fee on top of it.

Trading opens automatically at token #2040 — the highlighted row. Return is the better of the two exits: lifetime rent, or the burn valued at that epoch's arbitrage ceiling.

The honest part

Read the last row again. A token minted in epoch 9 — 3,689 tokens, 47% of the collection — earns no rent before the wall, because there is no later epoch to be paid from. That is not an oversight; it is why the burn exists. Burned inside its own epoch, that token returns 1,000 $FLY worth exactly what it cost. If you are mining late you are buying the picture, the Monarch draw and the burn — not the yield. We would rather say that here than let you find it in a spreadsheet.

An ERC-20 that exists only because a HashFly stopped existing

One Uniswap v4 pool of native USDC and $FLY with a hook attached. Pool fee 0%; the hook charges 3% in and 3% out — 2% buys $FLY back and burns it, 1% goes to the project. Trading opens automatically at token #2040 with roughly $25,000 of liquidity accumulated by the hook from mints before that point. No outside capital seeds this pool.

128 × 128, sixteen colours, drawn by the contract

Nine slots, 150 traits, every shape drawn by code rather than stored as a path. Thirty-four of those traits cost no sprite bytes at all — they rewrite four palette entries and the renderer draws the same geometry. That is why the eye can be one of fourteen colours for free.

Every fly above came out of the same generator the contract will run — same seed, same weights, same clash rules.

The names are not invented. w, se, bw, cn, v, vg, Cy, ap, y, e, Antp — these are Drosophila melanogaster alleles with a century of published literature behind them. The collection is a fly lab, and it is spelled correctly.

Seven 1-of-1s, one per window of 1,111

Inside a window the chance grows as 1 / (1,112 − position), so while a window's Monarch has not dropped, its last fly is a guarantee; once it has, the rest of that window is ordinary. The draw runs at the mint and reads the same seed the fly is drawn from — one number decides both the picture and whether it is a Monarch.

The Driving Fly

Both hands on the wheel, running the night road. The only Monarch that is going somewhere.

The Carver

A long blade, a turning spit, and a fly that has done this every night for years.

The Cube

Six faces, one solved state, and 43 quintillion wrong ones. A fly holding a search problem.

Morgan's White-Eyed Male

1910. One white-eyed male in a bottle of red-eyed flies, and modern genetics starts.

The Lewis

bithorax past the end of the slot: eight blades, etched in amber. Too many wings, one fly.

Firedamp

The gas that kills you without a sound. Nothing on this fly is drawn but its burning edge.

Queen Melanogaster

The only gravid fly in the collection. Five eggs, lit from inside, under a violet crown.

7

drawn by hand, outside the roll,
on reserved token ids

The miner

Three implementations of the same keccak round — WebGPU on the graphics card, WebAssembly SIMD on the processor cores, and a JavaScript fallback — all of which must agree before an attempt can become a transaction. The card is never taken without asking.

Measured hashrates will be published from the public beta, on named hardware. No performance figure is claimed here before it has been measured. Mining opens within 7 days of Arc public mainnet going live.

Nothing here asks you to trust a person

The project's ten per cent is paid to two Safe 2-of-3 multisigs — team & investors, and development, 5% each. Both addresses are fixed in the contract at deployment and readable on chain. The royalty receiver cannot be changed. The team is anonymous.

Roadmap

No dates, and no descriptions of what does not work yet. The other entries exist; they stay covered until they ship.

Questions