Hash Frog: browser-mined PoW NFT + HFROG token (evm_project, Ethereum mainnet, paired with IMD). One Foundry project: token, Uniswap v4 hook, NFT with burn vault, staking. Deploy in the launch, then host a site on the live addresses. No owner, admin, upgrade or pause.

NFT "Hash Frog" (HASHFROG)

• Cap 2,000 ever minted; burned ids never reused.
• Mine: keccak256(minter, nonce, lastSeed, blockhash(refBlock)) < target; refBlock within last 64 blocks; lastSeed = previous frog's seed (fixed genesis for #1).
• ~60/hour: retarget every 8 mints toward 60 s per mint (max 4x harder / 2x easier). Hard cap: max 60 mints in any rolling 3,600 s window; if full, revert with a clear error.
• One per tx, price exactly 0.0019 ETH. Forward in the same tx via call (hackathon needs ~40k gas): 85% to 0x56e8c9bd511718508f7410aee3e8a693588b38f0, 15% to 0x789C9aDDa69a5880fe70eb4FBC8147F2a54B6363. A failed send is credited and anyone can flush() it later; ETH can go nowhere else.
• Fully on-chain original frog art (your style), all traits from the seed, a few rares and 1-of-1s; no copies of existing characters or collections.

Token "HFROG" (HFROG), supply 1,000,000,000

• 70% seeds the factory's v4 pool with IMD; fee tier per factory policy.
• 20% (200,000,000) is the NFT burn vault. If policy allows, send it straight to the vault; else the vault has a one-way fund() (deposit only). Burns revert "vault not funded" until it holds 100,000.
• Hook: 1.5% buy and 1.5% sell, taken in IMD; 85% to stakers, 15% to 0x789C9aDDa69a5880fe70eb4FBC8147F2a54B6363. No anti-snipe.

Burn: frog holder burns a frog, receives exactly 100,000 HFROG from the vault. Vault pays out only via burns; unused part stays locked forever.

Staking: stake HFROG, earn IMD pro rata (accumulator, claim anytime); fees with no stakers are held for the first stakers; unstake delay 24 h, no rewards during the delay.

Site: browser miner (WebGPU, WASM/CPU fallback; hashrate, difficulty, ETA, free slots this hour), mint, gallery from tokenURI, buy/sell HFROG vs IMD, burn, stake/unstake/claim, stats (minted/2,000, vault balance, ETH to hackathon and team, IMD to stakers).

Tests: <=2,000 mints; <=60 per 3,600 s; solution bound to minter; reused lastSeed fails; wrong price reverts; 85/15 exact, flush works; burn pays exactly 100,000, vault never negative, no withdrawal; hook 1.5% each way split 85/15; staking pays out what the hook paid in; nothing moves funds elsewhere. Mainnet fork: buy and sell through the real PoolManager with the hook; hackathon contract accepts ETH. Independent review.