Built on Robinhood Chain · rewards in ETH
Open the tab and press Start. Your graphics card searches keccak shares for the current round on Robinhood Chain, the contract recomputes every hash before it counts, and every ten minutes the pool pays the round out in ETH, in proportion to work. Nothing to install.
No presale and no team allocation: the pool is 40% of the token’s trading fees, in ETH, and miners are the only ones who can take anything out of it. Nothing here has been audited; the code is public.
Capabilities
Six properties, and every one of them is a line you can find in the contract or the miner.
A share is a nonce whose keccak starts with enough zero bits. Batches of up to 64 go on chain and HashMine hashes each one again before it counts. Nothing is taken on trust, not even from your own tab.
On-chain verify · 64 per batch · No relayThe beneficiary is part of the message, so a share found for you is worthless to anyone else. Anyone can submit it, anyone can claim for you, and nobody can redirect the payout.
Bound shares · Claim by anyone · No redirectEvery trade of the token pays a fee, and 40% of the project’s part flows into the pool as ETH. Every 600 seconds the pool releases 0.48% of itself to the round that just closed, split by work.
ETH rewards · 48 bps a round · Pro rataThe engines work in bursts and rest at least as long as they work. The duty cycle is measured, not assumed, capped at 50%, and you can take it down to 10% while mining.
Measured duty · 50% cap · AdjustableA WGSL keccak kernel runs on WebGPU; a Rust WASM engine covers machines without it, one worker per core. Both share one nonce space and every hit is re-checked on the CPU before it leaves the tab.
WebGPU · WASM · CPU recheckHashMine has no admin, no pause and no parameter that can change. The only lever anywhere is a 7-day timelock on where the fee stream goes, and that is announced on chain when it is pulled.
Immutable · Timelocked stream · Public codeHow it works
Choose, Start, Submit, Claim. You press one button; the miner and the contract do the rest, and each step is a transaction you can look up.
Say where rewards go: connect a wallet or type an address. A throwaway session key in this browser pays gas, and only gas.
Press Start. Your GPU searches the current round’s challenge at a difficulty the miner picks for you: about 32 shares a round, never a share worth less than twice its gas.
Shares are batched and sent before the round ends. The contract verifies every one and credits your work to the beneficiary.
When the round closes the pool releases 0.48% of its ETH, split by work. Claim whenever you like; it accumulates until you do.
A round with no shares releases nothing and never catches up: the pool only shrinks by work. The test suite closes rounds, skips empty ones and checks that the release is exactly 48 bps of what was there.
The pool
Trading the token pays a fee. A fixed share of it lands in the pool as ETH. Nothing else can add to it, and only miners can take from it.
harvest() is callable by anyone.Five numbers, fixed at deployment. They are constructor arguments of a contract with no owner; changing any of them means deploying a new pool, in public.
Ready when you are