Braiins Pool

Imagine Eva running one ASIC, a machine designed specifically to mine Bitcoin. Her machine repeats calculations, trying to earn the opportunity to add a new block, a batch of transactions, to Bitcoin’s history. Her electricity bill keeps arriving, but with a tiny share of the network’s power she might wait a very long time to find a block alone. Braiins Pool lets her work alongside others for smaller, more regular rewards. The machine remains hers; the pool supplies coordination and accounting. Braiins is the company, while Braiins OS is separate software that controls mining equipment. The pool does not own every connected machine and cannot rewrite Bitcoin’s rules. [8] [3]

The story begins with Marek Palatinus, known as Slush. He announced Bitcoin.cz Mining Pool in November 2010 and launched it in December. Braiins took over operations in 2013. The service became Slush Pool in 2016; the company acquired the remaining stake in 2020 and adopted Braiins Pool in 2022. An older article about Slush Pool therefore describes an earlier name of today’s service, not a different mining method. It was the first public Bitcoin pool, and the service remains in operation today. [1] [2] [14]

The pool, or its template provider, prepares a candidate block: transactions and the information needed to connect it to the existing history. It sends mining work through a communication protocol called Stratum. The block header is a compact set of data about the block. The ASIC repeatedly calculates a hash, a numerical fingerprint, from changing versions of that header, looking for a sufficiently small result. Control software also prepares new variations of the work; the chip is not assembling transactions by itself. If the hash meets the network’s harder requirement and the candidate block satisfies all other rules, the network can accept that block. [8] [11]

Waiting for a whole block before accounting for work would leave the original problem unsolved. The pool therefore accepts results that meet an easier condition. These mining shares provide ongoing evidence of work. Most are not good enough to form a block, but occasionally one also meets the network condition. Shares have an assigned difficulty. Meeting a harder condition takes more calculations on average, so the pool accounts for difficulty as well as the number of results. Invalid or late results may be rejected. Eva therefore checks connection quality as well as the number displayed on her machine. [8] [10]

Braiins Pool uses Full Pay Per Share, or FPPS. Accepted work earns an expected share of newly issued bitcoin and transaction fees, even if the pool happens to find fewer blocks than its computing power would suggest. The operator carries that fluctuation in luck. The calculation uses network difficulty and an adjusted average of fees; 144 blocks a day is the average implied by a ten-minute interval, not a daily promise. FPPS does not guarantee a fixed income in BTC or local currency: difficulty, rewards, fees and exchange rates change. [4] [5] [10]

Stratum V1 is the older way of communicating work and does not itself provide modern authenticated encryption. Supported Stratum V2 connections can protect communication and verify that the machine reached the intended pool server, preventing an impostor from intercepting the connection. Another part of the protocol allows miners to propose their own selection of transactions for a block. A V2 connection alone does not demonstrate that this feature is being used: both sides need suitable support and configuration. Safer communication therefore does not automatically give the miner control over block contents. [7] [13]

Documentation checked on 17 October 2026 lists a standard pool fee of 2.5%. A sat is the smallest unit of bitcoin. For illustration, a reward of 10,000 sats before this fee becomes 9,750 sats after deducting 250 sats. That is not yet profit after electricity. On-chain payouts of at least 0.005 BTC have no pool payout fee; smaller payouts cost 0.0001 BTC. Lightning Network payouts have no such fee. A 0% pool-fee offer with Braiins OS does not remove the firmware’s separate terms and costs. Check the rates again before use. [4] [12]

Automatic payouts are evaluated daily around 09:00 UTC, according to the selected schedule or amount threshold. Documentation lists on-chain limits of 0.0002–5 BTC and Lightning limits of 1–500,000 sats. Financial Accounts are internal accounts for splitting rewards, not wallets under your control. Lightning needs a reachable recipient and a usable payment route; an offline wallet can make receiving difficult. Check which receiving method is supported and whether the payment actually arrived, rather than relying only on a deducted balance in the pool interface. [4] [11]

Non-KYC means the service does not ordinarily require identity documents. It does not mean anonymity. Its privacy policy covers information including email, payout addresses, IP addresses, device details and performance and reward history. Until payout, the balance is money that Braiins Mining Limited owes you. If a custodial Lightning wallet receives the funds, dependence on another custodian moves rather than disappears. Protecting the account, checking the payout address and distinguishing an account balance from funds you control are therefore important parts of using the service. [5] [6]

Eva ultimately compares the rewards actually received with electricity, cooling and equipment costs. She checks rejected results, outages, payout conditions and who chooses transactions. A larger pool may find blocks more regularly, but under FPPS that alone does not promise more reward for the same work. The rules and the operator’s ability to pay matter. Mining Pool, FPPS and Stratum V2 provide useful next steps: shared mining, reward accounting and communication are connected questions, but understanding one does not settle the others. [10] [5]