1 What it is

Hashratrr is a memecoin on Solana, launched on pump.fun, with a real job. Its creator fees rent Bitcoin mining power every day, and that mining power tries to find a whole Bitcoin block on its own. The mascot is a rat in a miner's helmet running in a wheel; the wheel turns as fast as the hashrate we actually get.

Two things can happen for holders: every day one holder wins the day's pot in SOL, and if the rat ever finds a block, half of the block reward goes to holders.

2 How to take part

Hold $HASHRATRR in a Solana wallet. That is all: there is nothing to register, sign or claim for the daily draw.

• Minimum: 500,000 $HASHRATRR (0.05% of the 1,000,000,000 supply) at the snapshot.
• Weight: your balance, capped at 10,000,000 $HASHRATRR (1% of supply). Holding more than 1% does not raise your odds further.
• Snapshot: balances are read at 00:00 UTC, the moment the day ends.
• Not in the draw: the pump.fun bonding curve, liquidity pool accounts, the burn address and the project's own wallets. The snapshot lists each excluded account with the reason.

Your odds on a day are your weight divided by the total weight of everyone in the draw. Check my wallet on level 1 computes it from the last snapshot.

3 Where the fees go

4 Renting hashrate

The rental share of the fees is spent in rounds: every time it reaches 0.1 SOL (at most once an hour) the keeper swaps it from SOL to BTC and rents more SHA-256 mining rigs for 24 hours on Mining Rig Rentals, cheapest per PH/s first among reliable rigs. Rounds stack, so the more fees come in, the more rigs run at the same time; the site counts the rigs at work live. Every rig points at our share relay, which passes the work to a solo mining pool with our own Bitcoin address as the worker. Today 1 PH/s for a day costs about ....

The site shows two numbers: the hashrate we paid for and the hashrate the pool actually measures. A rig can deliver less than it advertises or drop out; the wheel always follows the measured number, never the advertised one. BTC that did not fit into whole rigs stays on the rental account for the next day.

5 The odds

Every hash has the same tiny chance of being a block. With a hashrate of H hashes per second against the network difficulty D, the expected number of blocks in a day is

λ = H × 86,400 / (D × 2³²)

and the chance of at least one block that day is P = 1 − e^−λ. The site prints it as "1 in N" with N = 1 / P, never rounded in our favour.

Example with today's numbers: ...

6 Shares and the best hash

A mining rig keeps hashing 80-byte block headers. Most hashes are useless; a pool accepts the ones that start with enough zeros as shares, which prove work was done. A share's difficulty says how rare it is: a difficulty of 1,000,000 means one hash in about 4.3 × 10¹⁵ is that good. A share whose difficulty reaches the network difficulty is a block.

The keeper sits between the rented rig and the pool and logs every share it passes on. At 00:00 UTC the hardest share of the day, the best hash, is published as its full 80-byte header. Anyone can hash that header and see its difficulty. The header also contains the hash of the Bitcoin block it was built on, which proves the share was mined after that block appeared, so it could not have been prepared in advance.

7 The daily draw

The best hash is the random number. Nobody can choose it: getting a different one means mining again, with real electricity, and the published header shows exactly when it was made.

day    = floor(unix_time_of_00:00_UTC / 86400)       // the day that just ended
seed   = sha256( best_hash (32 bytes, explorer order) || day as 4 bytes big-endian )
list   = holders with balance ≥ 500,000 tokens, sorted by the bytes of their public key
weight = min(balance, 10,000,000 tokens)           // raw units, 6 decimals
W      = sum of all weights
r      = seed as a 256-bit number  mod  W
winner = the first holder whose running sum of weights is greater than r

The keeper writes the day, the best hash, the winner and the pot to the Solana program, sends the pot, and publishes the header and the snapshot.

8 Check a draw yourself

1. Open Winners and press Recount on a day.
2. Your browser hashes the published header twice with sha256 and compares it with the published best hash.
3. It reads the Bitcoin block the header was built on from mempool.space, which dates the share.
4. It rebuilds the weights from the snapshot, rolls the seed and walks the list, then compares the winner.

A green "matches" means the published winner is the only possible result of that hash and that snapshot. The same code runs in the keeper (/js/draw.mjs), so the two cannot disagree.

9 Boost the wheel

• Burn any amount of $HASHRATRR in one transaction that carries the memo wheel:<hours>, with hours a whole number from 1 to 24.
• The burn is valued in SOL at the pool price at that moment. The next day the keeper rents extra rigs worth that much, for exactly the hours you chose, on top of the day's rigs, so the wheel visibly spins faster while they run.
• Boosts are paid from the boost reserve (5% of fees). If boosts ask for more than the reserve holds, each is filled in proportion. What no boost uses goes into that night's pot.
• Boosting does not change your odds in the daily draw. The biggest burner of the day is named Foreman on the front page.

10 If a block is found

The pool pays the whole reward (3.125 BTC subsidy plus the block's fees, today about ...) to our Bitcoin address. Bitcoin locks a block reward for 100 confirmations, about 17 hours; during that time the site is a siren. A holder snapshot is taken at the moment of the find, with the same 0.05% minimum and 1% cap.

• 50% goes to holders by that snapshot, claimed on this site.
• 40% buys $HASHRATRR back and burns it.
• 10% stays for rental, so the rat keeps digging.

11 Where the numbers come from

• Bitcoin network (difficulty, network hashrate, latest blocks, block reward, BTC price): mempool.space, refreshed every 2 minutes.
• Hashrate price: Mining Rig Rentals' suggested SHA-256 price plus its 3% fee, refreshed every 5 minutes.
• The rat (rented and measured hashrate, hashes today, best hash, pot, boosts, draws): the keeper's public report. If it is older than 20 minutes the site says the keeper has gone quiet and shows the wheel stopped.
• Network counter: network hashrate × seconds since 00:00 UTC. It is an estimate and marked ≈.

Before launch every number about the rat is empty on purpose. Nothing on this site is simulated and labelled live.

12 Risks

• The rat may never find a block. At a few PH/s the odds are around one in a couple of thousand per day.
• Hashrate rentals can fill partly, and SOL to BTC swaps cost fees and time.
• The pot depends on trading volume: no volume, no fees, small pot.

Hashratrr is a memecoin and a long shot at a Bitcoin block, not an investment: it can go to zero, so only put in what you can afford to lose.