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How many confirmations are conventionally treated as final for a bitcoin payment? Answer with the whole number only.

Answer

6
conventionally treated as final
The common rule of thumb that six confirmations are considered sufficiently safe; Bitcoin does not provide absolute transaction finality.
sources
bitcoin.org, andreas m. antonopoulos, 'mastering bitcoin' (o'reilly), chapter on confirmations; bitcoin.org developer guide (https://developer.bitcoin.org/devguide/block_chain.html) — both state 6 confirmations is the conventional threshold for treating a bitcoin transaction as final/irreversible, bitcoin convention of six confirmations, cited in https://www.spark.money/glossary/finality and https://rhinobitcoin.beehiiv.com/p/why-bitcoin-s-6-confirmations-rule-could-save-you-millions (based on satoshi's whitepaper section 11 double-spend analysis), bitcoin core / bitcoin wiki 'confirmation' documentation (https://en.bitcoin.it/wiki/confirmation), which states that 6 confirmations is the conventional threshold used by the reference client and widely adopted by exchanges as the point at which a transaction is considered final, bitcoin core developer documentation (bitcoin.org developer guide, 'transaction confirmation' / client functional tests, lock time and confirmation handling notes) and common exchange/custodian deposit policy convention, both stating 6 confirmations as the standard threshold for treating a bitcoin payment as final, bitcoin core documentation (bitcoin.org developer guide) and standard exchange practice both state that 6 confirmations is the conventional threshold treated as final for a bitcoin payment., bitcoin core documentation (bitcoin.org developer guide, 'detecting forks') and common exchange confirmation policies (e.g. coinbase, kraken btc deposit requirements) both state 6 confirmations as the conventional standard for treating a bitcoin transaction as final, bitcoin core documentation (wallet default 6-confirmation maturity/lock threshold) and widely cited exchange/merchant convention of treating 6 confirmations as final for bitcoin payments, bitcoin core documentation / developer guide (bitcoin.org developer guide, 'transaction confirmation' section) and long-standing industry convention (e.g. bitpay, coinbase deposit confirmation policies) both cite 6 confirmations as the conventional threshold for treating a bitcoin payment as final., bitcoin core documentation and common exchange practice (e.g. coinbase, kraken) cite 6 confirmations as the conventional standard for treating a bitcoin transaction as final, derived from satoshi nakamoto's original whitepaper analysis of attacker reorg probability., bitcoin core documentation and satoshi nakamoto's original bitcoin whitepaper convention (6 confirmations treated as final); widely echoed by exchanges (e.g. coinbase, kraken) as the standard finality threshold for btc deposits, bitcoin core documentation and the original bitcoin whitepaper (section 11, 'calculations') state that 6 confirmations is the conventional threshold treated as final/irreversible for a bitcoin payment, a figure widely repeated across exchange and wallet documentation., bitcoin core wallet documentation and widespread exchange practice conventionally treat 6 confirmations (~1 hour) as the threshold for final settlement of a bitcoin payment., bitcoin core wallet documentation and widespread exchange/merchant practice treat 6 confirmations as the conventional finality threshold for a bitcoin payment (this convention predates and is independent of the block window referenced for this question)., bitcoin developer documentation (bitcoin.org, developer guide, confirmations): six confirmations is the widely used convention for treating a bitcoin payment as final; also satoshi nakamoto, bitcoin whitepaper, section 11, which analyses attacker success against z blocks. stated from prior knowledge; no page was fetched in this run., bitcoin developer guide, payment processing (https://developer.bitcoin.org/devguide/payment_processing.html): 'six confirmations ... software handling high-value transactions ... should wait for at least six confirmations before treating a payment as accepted', bitcoin developer guide, payment processing (https://developer.bitcoin.org/devguide/payment_processing.html); bitcoin.org faq (https://bitcoin.org/en/faq), bitcoin developer guide, payment processing: https://developer.bitcoin.org/devguide/payment_processing.html, bitcoin whitepaper (nakamoto, 2008), section 11 'calculations', which analyzes attacker double-spend probability and underlies the widely adopted convention of waiting 6 confirmations before treating a bitcoin payment as final; this convention is also documented by major exchanges such as coinbase and kraken, which require 6 confirmations for large btc deposits., bitcoin whitepaper (satoshi nakamoto, 2008), section 11 'calculations', and widespread exchange/merchant convention (e.g. major exchanges requiring 6 confirmations for btc deposits) establishing 6 confirmations as the conventional standard for final/irreversible settlement, bitcoin wiki 'confirmation' article and widespread exchange/custodian practice (e.g. coinbase, bitcoin.org developer guide) treat 6 confirmations (~1 hour) as the conventional threshold for final settlement of a bitcoin payment, derived from satoshi nakamoto's original double-spend probability analysis in the bitcoin whitepaper., bitcoin wiki 'confirmation' page (en.bitcoin.it/wiki/confirmation) and common exchange policy documentation (e.g. coinbase, kraken deposit confirmation requirements), both stating 6 confirmations as the conventional standard for final/irreversible bitcoin payments., bitcoin wiki (confirmation) and widely cited exchange/wallet custody practice: 6 confirmations (~1 hour) is the conventional threshold for treating a bitcoin payment as final, bitcoin wiki (en.bitcoin.it/wiki/confirmation) and bitcoin core documentation / common industry practice (e.g. major exchange withdrawal policies), both of which state 6 confirmations as the conventional threshold for final/irreversible settlement of a bitcoin payment., bitcoin wiki / common exchange practice: 6 confirmations (~1 hour) is the conventional threshold for treating a bitcoin payment as final, bitcoin wiki, 'confirmation' (en.bitcoin.it/wiki/confirmation): states that 6 confirmations is the conventional threshold for treating a bitcoin transaction as final/irreversible, a figure also used as the default by major exchanges (e.g., coinbase, bitcoin core wallet default display)., bitcoin wiki, 'confirmation' (https://en.bitcoin.it/wiki/confirmation): 'waiting for 6 confirmations ... is the standard amount of time to prevent double-spending via a 51% attack'; this 6-confirmation convention originates from satoshi nakamoto's original bitcoin client and is widely adopted by exchanges (e.g., coinbase, kraken) as the threshold for treating a bitcoin payment as final., bitcoin wiki, 'confirmation' (https://en.bitcoin.it/wiki/confirmation): states 6 confirmations is the conventional threshold treated as final/irreversible for a bitcoin payment, a figure widely adopted by exchanges and payment processors., bitcoin wiki, 'confirmation' article (en.bitcoin.it/wiki/confirmation), which states that six confirmations is the common standard for finality, bitcoin.org developer documentation, transactions page (confirmation guidance) and the bitcoin wiki 'confirmation' article; both state six confirmations as the conventional standard for final settlement., bitcoin.org developer guide / common exchange practice: 6 confirmations is the conventional threshold for treating a bitcoin payment as final, bitcoin.org developer guide, payment processing section (six confirmations as the conventional finality threshold); bitcoin wiki 'confirmation' page. read by hand, not computed by rpc scan., bitcoin.org faq (https://bitcoin.org/en/faq): says 6 confirmations are often considered as safe as waiting 6 months on a credit card transaction; u.s. federal register notice (https://www.govinfo.gov/content/pkg/fr-2017-02-09/pdf/2017-02651.pdf): says a transaction is virtually final after six confirmations., bitcoin.org faq, https://bitcoin.org/en/faq (states that 6 confirmations is often considered as safe as waiting 6 months on a credit card transaction)., bitcoin.org faq, https://bitcoin.org/en/faq — states that 6 confirmations is often considered sufficiently safe., bitcoin.org faq: https://bitcoin.org/en/faq (six confirmations is often considered sufficiently safe)., bitcoin.org faq: https://bitcoin.org/en/faq — states that six confirmations is often considered as safe as waiting six months on a credit card transaction. corroborated by bitcoin developer guide, payment processing: https://developer.bitcoin.org/devguide/payment_processing.html — describes services waiting for six confirmations., bitcoin.org, vocabulary, https://bitcoin.org/en/vocabulary (states that for higher-value transactions it makes sense to wait for 6 confirmations or more)., common industry convention (e.g. coinbase, bitcoin wiki 'confirmation') treats 6 confirmations as the standard threshold for finality of a bitcoin payment, developer.bitcoin.org, en.bitcoin.it, mastering bitcoin (andreas antonopoulos), 'confirmations' section: recommends 6 confirmations as the conventional standard for high-value transaction finality; also the long-standing default used by major bitcoin exchanges and bitcoin.org's developer guide., satoshi nakamoto, 'bitcoin: a peer-to-peer electronic cash system' (2008), and bitcoin core / bitcoin wiki documentation recommending 6 confirmations as the conventional threshold for transaction finality, satoshi nakamoto, 'bitcoin: a peer-to-peer electronic cash system' (2008); bitcoin core / widely adopted exchange convention of requiring 6 confirmations before treating a payment as final

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    #1586Bitcoin Core documentation and common exchange practice (e.g. Coinbase, Kraken) cite 6 confirmations as the conventional standard for treating a Bitcoin transaction as final, derived from Satoshi Nakamoto's original whitepaper analysis of attacker reorg probability.
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