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What it is

$YEARN (the children yearn for the mines) is a pump.fun coin. Its creator fees pay for one thing: renting SHA-256 hashrate and pointing it at solo.ckpool.org, a public solo-mining pool, with our own Bitcoin address as the username.

On a solo pool your hashes are not pooled with anyone else's. If one of our rented machines finds a valid block, the block reward (3.125 BTC plus that block's transaction fees, less ckpool's 2%) is paid to our address in the block's coinbase transaction, where anyone can see it. If no machine finds a block, nothing is paid.

Where the fees go

1. Trade. $YEARN trades against SOL, so every buy and sell pays pump.fun's creator fee in SOL to the coin's creator wallet.
2. Claim. When enough has built up to pay for a useful rental, the creator wallet collects it from pump.fun's creator vaults. The amount recorded is what left those vaults in that transaction.
3. Swap. The claimed SOL is swapped to native BTC through Chainflip (no account needed), directly or through USDC, whichever quotes more BTC at that minute. Each quote is saved with its amount and time.
4. Rent. We buy SHA-256 hashrate on Braiins Hashpower (a spot market billed on delivered hashrate, up to the bid's budget) or MiningRigRentals (single rigs, billed on advertised hashrate plus a 3% renter fee), usually 1 PH/s for 24 hours. It points at ckpool's rental port, stratum.ckpool.org:4334.
5. Mine. ckpool's public page for our address shows live hashrate, shares and best share. The site reads it every minute and says so when it can't.

Rentals run while claimed fees cover them. If trading slows, rentals get smaller or stop, and the site shows that nothing is mining. 0.05 SOL stays in the creator wallet for transaction fees. Fees are spent only on hashrate, the swaps and the transactions above.

Each receipt is marked verified (re-read from the chain or the marketplace API) or operator-submitted (entered by us and not independently checked). Only verified receipts count toward the totals.

The odds

Bitcoin adjusts its difficulty so the whole network finds a block about every ten minutes. Each hash is an independent draw with a 1 in difficulty × 2³² chance of being a block.

H is hashrate in hashes per second, D is the difficulty. The average wait is D · 2³² / H seconds. An average is not a deadline: even after waiting that long, the chance of at least one block is only 63%.

Dated 2026-10-08: difficulty 132.7 T (about 950 EH/s implied), MiningRigRentals suggested price 0.000639 BTC per PH-day plus its 3% renter fee, BTC ≈ $82,958. Braiins Hashpower traded at 0.00049–0.00055 BTC per PH-day that morning. Odds assume uninterrupted hashrate and unchanged difficulty.

At those prices one PH-day costs $40–55 and is expected to earn about $38.70 after ckpool's fee. Renting hashrate loses money on average; the only reason to do it is the small chance of a block.

What the live numbers mean

• Odds we hit a block today: the latest 5-minute hashrate, extrapolated over a day. It assumes the current rate runs 24 hours; if the rental ends sooner, the real chance is lower.
• Chance the last 24 h of hashing had: from ckpool's 1-day average hashrate for our address. This is the chance that was actually bought.
• Closest share ever: our best share divided by the network difficulty. "1/3,400" means our luckiest hash so far would have needed to be 3,400 times harder. Every hash is a fresh draw: a close share is not progress. The pool-wide figure resets whenever solo.ckpool finds a block or is reset, so it is labelled "since its last reset", not "today".

It has happened

Rented hashrate has found blocks on public solo pools: block 938,092 (February 2026, about 1 PH/s rented on Braiins), block 899,826 (June 2025, solo.ckpool) and block 960,804 (August 2026, solo.ckpool). Those were long shots that landed; most attempts never do.

If a block is found

1. Verify. We check the block on public explorers: it is in the main chain, it is the block at its height, and its coinbase pays our address. We post the block hash.
2. Snapshot. Holders are counted by the snapshot rule below: each wallet's average balance over the 7 days of hourly snapshots before the block's 6th confirmation. The payout file and its checksum are published next to the block hash.
3. Wait for maturity. Bitcoin lets a coinbase be spent after 100 confirmations, about 17 hours. If the block is orphaned before then, there is no reward and no payout.
4. Swap and settle. The BTC is swapped to SOL. Every swap is recorded with its Bitcoin and Solana transactions, and the total SOL received is split by a fixed rule: 50% to holders, 50% to buyback and burn. Solana network fees come from the payout wallet's reserve, not from either half.
5. Holders. The holder half is sent in SOL to each wallet in the payout file, pro rata to its 7-day average balance, in batches of 18 transfers. Each batch is recorded once; a batch that has been paid is never sent again.
6. Buyback and burn. The other half buys $YEARN on the market (bonding curve or PumpSwap). The quote's minimum output is burned in the same transaction, and whatever it bought above that minimum is burned in a second transaction right after. Both are public.

Who counts as a holder

• Wallets whose 7-day average is at least 100,000 $YEARN (0.01% of the supply). Smaller averages are left out so payouts stay above network fees.
• Your share is your average divided by the sum of every qualifying average. Holding 1,000,000 $YEARN all week counts as 1,000,000; buying 1,000,000 an hour before the block counts as about 6,000 and is under the minimum.

At 3.125 BTC plus about 0.018 BTC of fees (an illustrative figure from 2026-10-08), a block is worth roughly $260,700 at today's BTC price, before ckpool's 2% and swap costs.

The snapshot rule

Hourly snapshots. When we hit a block, holders split half by their 7-day average. The rest burns.

From launch, the site reads every $YEARN holder from Solana once an hour and stores the balances. When a block is found, each wallet's balance is averaged over the hourly snapshots taken in the 7 days before the block's 6th Bitcoin confirmation (about an hour after the block). The rule is fixed before mining starts, so nobody, including us, chooses the moment.

A found block is public on Bitcoin straight away. Averaging over a week means buying after it barely moves anything: one hour of a large balance is 1/168 of the week.

• Every wallet is averaged over the same snapshots. A wallet missing from a snapshot held nothing in it. If an hourly snapshot failed (an outage), that hour counts for nobody rather than as zero for everyone. If fewer than 75% of the expected hours exist, the payout file says so.
• Early blocks. If a block comes in the first week, the average covers the snapshots since launch.
• Minimum. An average of at least 100,000 $YEARN. Above it, pro rata.

Check your share

Paste a wallet into "your mining permit" on the home page to see its current 7-day average and what share of the holder half it would get if a block hit now. It is an estimate from the latest hourly snapshot; the payout file published with a block is final.

Check the snapshots

Every hourly snapshot is published at /api/snapshots with its sha256, and each one names the hash of the one before it, so changing or removing one later would break the chain against hashes already published. Each file is at /api/snapshots/<hour> (for example 2026-10-10T13, UTC) and hashes to the published value byte for byte. Files are kept for 45 days; the list keeps the latest 2,000 hashes (about 12 weeks).

Check it yourself

• Pool page for our address: published with the payout address at launch. Live hashrate, workers, shares and best share, served by ckpool, not by us.
• Our payout address: published at launch. Any block reward lands here first.
• Rentals: each rental's marketplace, order id, size and length are on the home page.
• Raw data: ledger.json (every receipt) and /api/status (the live numbers).

FAQ

Why not just buy bitcoin with the fees?

That would be certain and small. This spends the fees on a small chance at a whole block, and anyone can watch it happen.

Why a solo pool and not a normal one?

A normal pool pays a small, steady amount and the expected value is the same. A solo pool pays nothing unless our machines find a block themselves. That is the point of the project, and it is why the most likely outcome is nothing.

How often do you rent?

Whenever claimed fees cover a useful rental, usually 1 PH/s for 24 hours. The home page shows whether a rental is running and when it ends.

Why a 7-day average and not a snapshot at the block?

Blocks are public the moment they are found. With a single snapshot, anyone could buy right after a block and take a full share from people who held all week. The average pays for time held.

Who holds the keys?

We hold the creator wallet, the payout wallet and the Bitcoin address. Every spend is a public transaction.

What are the risks?

• We will most likely never find a block. At the sizes creator fees can pay for, the chance over a year is a few percent to tens of percent, and only if trading keeps paying for rentals. Assume nothing happens.
• $YEARN can go to zero. Nothing here is an investment or a promise of returns. The only commitment is how a found block's proceeds are split. Check what buying and holding a token means where you live.
• You trust us with the payout. The BTC lands at an address we control and the payouts are sent by us. Every step is public, but it is not a smart contract.
• Rentals can underdeliver. A rented rig can go offline or run below its advertised speed. MiningRigRentals bills advertised hashrate; Braiins bills what it delivers to the pool, including some deliveries the pool rejects. The pool page shows what actually arrived.
• Providers can stop us. Braiins Hashpower can ask for identity verification and can suspend or freeze accounts under its terms. MiningRigRentals' website terms describe personal, non-commercial use unless agreed in writing, so we use Braiins first and confirm with MiningRigRentals before relying on it. A suspension would stop the rentals.
• Swaps cost something. Chainflip charges a fixed network fee plus the pool spread, so small swaps lose a few percent. Swaps are batched to keep that low.
• Third parties fail. The pool, the marketplaces, the swap service and the explorers can go down or change their terms. When a live source is down, the site says "data unavailable" rather than showing a zero.
• Pool fee and orphans. solo.ckpool keeps 2% of a found block. A block that is orphaned before 100 confirmations pays nothing.