What you do in Mini Miner

Each screen, each step#

The app opens in a simple view: your number, the start of your hash, the leading zeros, and after each try a verdict in plain words (no block this time, how many zeros were missing, and how long your device would need on average). The Advanced info switch, at the bottom of the console, shows everything else: the full hash against the target, the workers, the live hashes, the count of leading zeros, the difficulty and the extranonces. Your choice is remembered on this device.

Your payout address#

A block found from your browser pays the address you give, written into the block itself. Three ways to give it without retyping it: Connect my wallet asks a browser wallet extension (Xverse, Leather, Unisat, OKX, Phantom) for its receiving address, and nothing else; Scan a QR code reads the receiving QR code shown by a phone wallet; Paste takes it from the clipboard. Mini Miner never creates a wallet, never sees a recovery phrase and never asks for a signature. No wallet yet? The guide suggests Xverse, BlueWallet or Sparrow. You can change the address at any time in My profile; blocks already found stay paid to the address in their coinbase.

The live candidate block#

Mini Miner connects to a solo mining pool over Stratum, the protocol mining machines use, and receives the block the pool is currently trying to mine: the transactions, the previous block hash and the target. Your browser rebuilds the 80-byte header exactly as mining hardware does. When the network finds a block, the pool sends a new candidate and the app switches to it.

Manual: one attempt at a time#

Type a nonce, or press Random. The app inserts it into the header, computes the SHA-256d and shows the result above the target, character against character. The gauge counts the leading zeros you reached against those of the target; the verdict is the numerical comparison.

Automatic: your browser as a miner#

In the Automatic tab, Web Workers hash on the cores of your device, each on its own extranonce. Max is calibrated on your machine: workers are added one by one until another one no longer adds throughput. Only one window per address mines at a time, so two tabs never compete with each other. With Advanced info on, the Details panel shows the extranonce1 the pool gave your session and the extranonce2 each worker is on (see when the nonces run out).

While a session runs, the browser tab shows its clock: the countdown of a demo, a boost or a timer, or the time elapsed. The session is saved every 20 seconds and once more when the tab closes: it appears in your history as interrupted, with what was done, instead of being lost. Mining also keeps going while you browse the rest of the site (Learn, Pricing, your profile): a banner under the header shows the session and takes you back to it.

Demo, boosts and Premium#

Demos of automatic mode last 15 seconds and are free and unlimited: start another a few seconds after the last one ends. Every account also gets two boosts of one minute each. The server counts them: reloading the page resumes the run in progress instead of using up another one, and two tabs never spend two boosts at once. Each session ends with a count of your hashes that started with 0, 00, 000 and so on, next to what was expected.

Premium unlocks automatic mode without a time limit for your account, on any device where you are signed in, for as long as the tab is open, a timer from 1 minute to 1 hour that stops the session and alerts you, and the history page of your sessions with its statistics. It is a one-time payment of USD 29 for lifetime access. The computation always runs on your own device: Premium buys no bitcoin, no hashrate and no chance of winning. The real probability of finding a block at your device’s measured hashrate is shown before you pay.

Achievements and leaderboard#

Achievements and the leaderboard only count work the relay has checked itself. Your browser sends the relay every hash with at least 6 leading zeros, with the job, extranonce2, ntime and nonce that produced it; the relay recomputes it on the real candidate block of your session, whose coinbase pays your address, and records it only if it really has 6 zeros. Mining time counts only while the relay grants your mining lease. A session typed into the browser console changes neither your achievements nor your rank.

The number of hashes is an estimate: each proof stands for 16⁶, about 16.8 million hashes on average, because a hash has one chance in 16⁶ of starting with 6 zeros. The count of proofs varies by chance, like any rare event: with 100 proofs the estimate is typically within 10% of the truth, with 10 proofs within about 30%, and it tightens as you mine.

Achievements reward leading zeros (one per level, from 1 zero to a real block: below 6 zeros, your browser sends only its new records, which the relay recomputes the same way), the length of one continuous session (the relay sees an unbroken lease), total mining time, regularity, the time of day (in your time zone, set once for good), the leaderboard and seniority. None of them brings a block closer, as every hash keeps exactly the same chance, and none rewards leaving your computer mining night and day: the longest session rewarded lasts 4 hours.

How the reward would be paid#

The reward is not paid later by Mini Miner or by the pool: it is written into the block itself, 98% to your address and 2% to the pool. Because your hash covers that split, it cannot be changed without invalidating the block. Before you mine, your browser reads the candidate block’s coinbase and confirms that it pays your address; if not, mining is blocked.

What Mini Miner does not do#

• It never holds funds and never generates, sees or stores private keys.
• It never promises a gain. Probabilities are shown before any purchase.
• It sells neither bitcoin nor hashrate: Premium is access to software features.

The honest picture#