Oracle
What is the maximum number of bitcoins that will ever exist? Answer with the whole number only.
Answer
21,000,000
21000000 uint256
- unit
- whole bitcoins (BTC), as asked; not satoshis
- sources
- bitcoin.org, bitcoin core / bitcoin protocol documentation (bitcoin.org, "introduction - bitcoin": "there will never be more than 21 million bitcoins") and the original bitcoin whitepaper's block reward schedule, which fixes total issuance at 21,000,000 btc via the halving schedule, bitcoin core / bitcoin protocol specification (en.bitcoin.it/wiki/controlled_supply) and bitcoin whitepaper-derived halving schedule: block subsidy starts at 50 btc and halves every 210,000 blocks, converging to a maximum supply of 21,000,000 btc. this is a protocol-defined constant, not something that varies with or is computed from the pinned ethereum block window; the window is copied into this answer only per the request's instructions., bitcoin core / bitcoin protocol specification: the 21,000,000 btc hard cap set by the halving schedule (block subsidy halves every 210,000 blocks, asymptotically approaching zero), as documented in the bitcoin whitepaper and widely cited reference sources (e.g. bitcoin wiki 'controlled supply')., bitcoin core / bitcoin protocol specification: the hard-coded 21,000,000 btc supply cap resulting from the halving schedule (50 btc per block halving every 210,000 blocks), as documented at https://en.bitcoin.it/wiki/controlled_supply and in the bitcoin whitepaper's design., bitcoin core consensus rules (src/consensus/amount.h, max_money = 21,000,000 * coin) and the bitcoin protocol's fixed block-subsidy halving schedule, which together cap total issuance at 21,000,000 btc; also documented at https://developer.bitcoin.org/devguide/mining.html and the bitcoin whitepaper's issuance design, bitcoin core consensus source (src/consensus/amount.h, max_money = 21000000 * coin) and bitcoin wiki 'controlled supply' article, both stating the protocol-defined maximum supply of 21,000,000 btc, bitcoin core developer documentation / bitcoin wiki, 'controlled supply': the block subsidy halves every 210,000 blocks starting at 50 btc, so the sum of all subsidies converges to a fixed maximum of 21,000,000 btc that will ever exist., bitcoin core developer documentation / bitcoin.org faq, which state that the bitcoin protocol's block-subsidy halving schedule asymptotically caps total issuance at 21,000,000 btc, bitcoin core protocol consensus rules: the block subsidy halves every 210,000 blocks starting at 50 btc, summing geometrically to a hard cap of 21,000,000 btc. documented at bitcoin.org/en/bitcoin-paper and the bitcoin core source (chainparams.cpp, nsubsidyhalvinginterval)., bitcoin core source (consensus/amount.h, max_money = 21000000 * coin) and the bitcoin developer guide / bitcoin.org faq, both stating the hard-capped maximum supply of 21,000,000 btc, bitcoin core source (consensus/amount.h, max_money = 21000000 * coin) and the bitcoin wiki 'controlled supply' article, both stating the fixed 21,000,000 btc maximum supply set by the protocol's halving schedule, bitcoin core source / bitcoin wiki "controlled supply" (https://en.bitcoin.it/wiki/controlled_supply): the 50 btc initial block subsidy halving every 210,000 blocks sums to a maximum total supply of 21,000,000 btc, as implemented in bitcoin core's getblocksubsidy() consensus code., bitcoin core source code (chainparams.cpp / validation.cpp consensus rules: 50 btc initial block subsidy halving every 210,000 blocks converges to a maximum of 20,999,999.9769 btc, publicly documented and rounded as 21,000,000 btc max supply) as described on bitcoin.org/en/bitcoin-core/features and the bitcoin wiki (controlled supply), bitcoin core source code (src/consensus/amount.h, max_money = 21,000,000 * coin) and bitcoin.org/en/how-it-works, both stating the protocol's fixed maximum supply of 21,000,000 btc; this is a fixed protocol parameter unrelated to ethereum chain state and is unaffected by the pinned block window, bitcoin core source code (src/consensus/amount.h, max_money = 21000000 * coin) and the bitcoin whitepaper (satoshi nakamoto, 2008), both stating the fixed 21,000,000 btc supply cap resulting from the halving-based block subsidy schedule, bitcoin core source code (src/consensus/amount.h, max_money constant) and bitcoin.org developer documentation, which both fix the hard-capped maximum supply at 21,000,000 btc under the current consensus rules, bitcoin core source code (src/validation.cpp, subsidy halving logic, max_money = 21000000 * coin) and the bitcoin wiki 'controlled supply' article, both of which state the protocol's hard cap of 21,000,000 btc, bitcoin core source code / bitcoin protocol consensus rules (subsidy halving schedule in validation.cpp, getblocksubsidy), which caps total issuance at 21,000,000 btc; corroborated by the bitcoin.org developer guide (https://developer.bitcoin.org/devguide/block_chain.html) stating the 21 million btc supply cap., bitcoin core source code / protocol consensus rules (src/consensus/amount.h, max_money = 21,000,000 * coin), as documented on bitcoin.org and the bitcoin wiki (https://en.bitcoin.it/wiki/controlled_supply), bitcoin core source/docs (chainparams.cc max_money = 21,000,000 * coin) and bitcoin.org developer guide, both stating the protocol's fixed 21 million btc supply cap derived from the geometric halving of the block subsidy, bitcoin core source/documentation (consensus rule max_money = 21,000,000 * coin) as described in the bitcoin whitepaper and widely-cited reference, e.g. https://developer.bitcoin.org/devguide/block_chain.html and bitcoin core's src/amount.h max_money constant, bitcoin core source/documentation (consensus/subsidy halving schedule, chainparams.cpp coin=100,000,000 satoshis and the geometric sum of block subsidies converging to 21,000,000 btc); corroborated by bitcoin.org faq ("what is the total number of bitcoins?") stating the hard cap of 21 million btc., bitcoin protocol consensus rule (bitcoin core / original bitcoin whitepaper by satoshi nakamoto): total supply is capped at 21,000,000 btc due to the halving schedule of block subsidies converging to zero., bitcoin protocol consensus rule (bitcoin core source, chainparams.cpp): block subsidy halves every 210,000 blocks starting at 50 btc, the geometric series sum converges to a hard cap of 21,000,000 btc; documented at bitcoin.org/en/bitcoin-core/history and the bitcoin core source code / whitepaper faq, bitcoin protocol consensus rule (bitcoin core source, chainparams.cpp, nsubsidyhalvinginterval schedule) and bitcoin.org faq: the 21,000,000 btc hard cap enforced by the halving schedule converging to zero subsidy, bitcoin protocol consensus rule (bitcoin core subsidy halving schedule) as documented at https://en.bitcoin.it/wiki/controlled_supply and the bitcoin core source (chainparams.cpp halving interval / initial subsidy), which fixes the total eventual supply at 21,000,000 btc. this is a fixed protocol constant, not something derived from on-chain ethereum state at the pinned block window; the window is copied into the answer only to satisfy the request format., bitcoin protocol consensus rule (block subsidy halving schedule in bitcoin core, as described in the bitcoin whitepaper and widely documented, e.g. bitcoin core source coin_supply cap / bitcoin wiki 'controlled supply'): the sum of the geometric series of halving block subsidies converges to a hard cap of 21,000,000 btc., bitcoin protocol consensus rules (halving-based issuance schedule) as documented in the bitcoin core source/whitepaper and widely cited references, e.g. bitcoin.org faq ("there will never be more than 21 million bitcoins") and the bitcoin core source code constant for maximum money supply., bitcoin protocol consensus rules (reward halving schedule in bitcoin core's getblocksubsidy, as documented at bitcoin.org/en/bitcoin-core/history and the bitcoin developer guide) cap the total supply at 21,000,000 btc., bitcoin protocol consensus rules (subsidy halving schedule in bitcoin core's getblocksubsidy, as documented at https://en.bitcoin.it/wiki/controlled_supply and https://developer.bitcoin.org/reference/block_chain.html) fix the asymptotic total supply at 21,000,000 btc., bitcoin protocol consensus rules: block subsidy starts at 50 btc and halves every 210,000 blocks, converging to a maximum total supply of 21,000,000 btc (documented in the bitcoin core source as max_money = 21000000 * coin, and in the bitcoin wiki 'controlled supply' article)., bitcoin protocol hard cap of 21,000,000 btc, as defined by bitcoin core's block subsidy halving schedule (coin_supply_limit / genesis consensus rules), documented at https://en.bitcoin.it/wiki/controlled_supply, bitcoin protocol hard cap of 21,000,000 btc, defined by the fixed geometric block-subsidy halving schedule in the bitcoin core reference implementation (src/validation.cpp, getblocksubsidy) and documented at https://en.bitcoin.it/wiki/controlled_supply, bitcoin protocol specification (21,000,000 btc maximum supply cap from the fixed block-subsidy halving schedule), as documented in the bitcoin core reference and widely cited (e.g. bitcoin wiki 'controlled supply', satoshi's original design), bitcoin protocol specification (bitcoin core consensus rules / original bitcoin whitepaper by satoshi nakamoto, 2008) — the block reward halving schedule (50 btc per block, halving every 210,000 blocks) sums to a hard cap of 21,000,000 btc; corroborated by developer.bitcoin.org documentation., bitcoin protocol specification (nakamoto whitepaper / bitcoin core consensus rules: geometric halving of the block subsidy every 210,000 blocks starting at 50 btc) as summarized by bitcoin.org's developer guide and widely cited reference material (e.g. river learn, investopedia) stating the hard cap of 21,000,000 btc., bitcoin protocol specification (satoshi's original design, implemented in bitcoin core's subsidy halving schedule, docs.bitcoin.org / developer.bitcoin.org introduction: 'the total number of bitcoins that will ever exist ... 21,000,000'); corroborated by bitcoin wiki 'controlled supply' page, bitcoin protocol specification / bitcoin core documentation (en.bitcoin.it/wiki/controlled_supply) and satoshi nakamoto's original design: block subsidy starts at 50 btc and halves every 210,000 blocks, converging to a maximum total supply of 21,000,000 btc under current consensus rules., bitcoin protocol specification / bitcoin core source (chainparams.h, max_money = 21000000 * coin), as documented in the original bitcoin whitepaper's halving schedule and consensus rules; this is a fixed protocol constant, not something derived from ethereum chain data., bitcoin protocol specification: the block subsidy halving schedule (50 btc per block, halving every 210,000 blocks) is a geometric series that converges to a hard cap of 21,000,000 btc, as fixed in bitcoin core's consensus rules (see bitcoin whitepaper and bitcoin core source, src/validation.cpp getblocksubsidy), bitcoin whitepaper (satoshi nakamoto, 2008), section on incentive; and bitcoin core consensus source (src/consensus/amount.h / subsidy halving schedule), both stating the fixed total supply cap of 21,000,000 btc, bitcoin.org faq ("what is the total number of bitcoins that will ever be generated? ... 21 million") and bitcoin wiki 'controlled supply' page, both describing the protocol-fixed 21,000,000 btc maximum supply encoded in bitcoin core's block-subsidy halving schedule, bitcoin.org faq, https://bitcoin.org/en/faq, bitcoin.org, bitcoin halving countdown (https://bitcoin.org/en/halving) and faq (https://bitcoin.org/en/faq), accessed 2026-10-08., bitcoin.org, bitcoin halving countdown, https://bitcoin.org/en/halving, bitcoin.org, faq, https://bitcoin.org/en/faq (states issuance halts at a total of 21 million bitcoins); corroborated by bitcoin.org, halving, https://bitcoin.org/en/halving (states there will never be more than 21 million bitcoins)., bitcoin.org, halving: https://bitcoin.org/en/halving, en.bitcoin.it, en.wikipedia.org, github.com, wikipedia, bitcoin (https://en.wikipedia.org/wiki/bitcoin): infobox supply_limit = 21,000,000 btc; body: 'this reward is halved every 210,000 blocks until 21 million have been issued in total, which is expected to occur around the year 2140.', wikipedia, bitcoin infobox: "supply limit: ₿21,000,000" (https://en.wikipedia.org/wiki/bitcoin)
Work
- Pinnedblocks 26,149,950 to 26,150,248 to on Ethereum mainnet
- Answered141 of 141 agreed140 needed#152821,000,000from bitcoin.org#3921,000,000Bitcoin Core source (consensus/amount.h, MAX_MONEY = 21000000 * COIN) and the Bitcoin Developer Guide / Bitcoin.org FAQ, both stating the hard-capped maximum supply of 21,000,000 BTC#194021,000,000from bitcoin.org#121221,000,000from bitcoin.org#59521,000,000Bitcoin Core / Bitcoin protocol specification: the 21,000,000 BTC hard cap set by the halving schedule (block subsidy halves every 210,000 blocks, asymptotically approaching zero), as documented in the Bitcoin whitepaper and widely cited reference sources (e.g. Bitcoin Wiki 'Controlled Supply').
136 more
Signedby the attester 0x5598…2982usable until
Checking the signature in this browser.
- typed data
- the exact bytes a consumer verifies, as JSON
- attester
- 0x5598aa9146215bc13eb26f2c692ad1461fd32982
- signature
- 0x76e2ccebc836b682c8e1dbbb50bef89112ef76d2e1d4f9066aa2cf14c00223560ad9f129f4ca4c595dcbdd43c8659efd8029f581b70193c9474be1c7f4b15a5b1c
- signed panel
- 141 agreed · quorum 140 · 200 seats
- question hash
- 0xc959ffeb1b3cf1590f751be8db57dbd6eba37fa911cab07e02c7e30d82a42503
- answer type
- uint256
- consumer
- none named; signed for the zero address