{ "status": "proposed specification; adopted normative schedule", "calendarRunwayMonths": 6, "calendarFinalMonths": 78, "ratioNumerator": 11, "ratioDenominator": 10, "rows": [ { "stage": 0, "addressRule": "1", "compactAddressRule": "1", "txidRule": "all", "txidBits": 0, "volume": 0, "eligibleHash160Values": "1461501637330902918203684832716283019655932542976", "addressTrials": 1.0, "addressWorkBits": 0.0, "txidTrials": 1, "nominalElapsedMonths": 0.0, "nominalIntervalMonths": 0.0, "postGraceWeightNumerator": "0", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 0, "scriptHashRule": "all", "scriptHashTrials": "1", "spendAccountingMode": "all_confirmed_spends", "requiredTransactionVersion": null }, { "stage": 1, "addressRule": "1[6789ABCDEFGH]", "compactAddressRule": "1[6\u2013H]", "txidRule": "[8-f]", "txidBits": 1, "volume": 400000, "eligibleHash160Values": "764125684768434418601123225064103715940299996942", "addressTrials": 1.9126456111389658, 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"compactAddressRule": "1Ch[ij]", "txidRule": "99[89]", "txidBits": 11, "volume": 7333334, "eligibleHash160Values": "37873370759127864234786966167282487865631167", "addressTrials": 38589.16193718158, "addressWorkBits": 15.235908091938569, "txidTrials": 2048, "nominalElapsedMonths": 26.95238773685805, "nominalIntervalMonths": 2.5042632277939902, "postGraceWeightNumerator": "317724816941565100000000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 16, "scriptHashRule": "7777", "scriptHashTrials": "65536", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 17, "addressRule": "1Chi", "compactAddressRule": "1Chi", "txidRule": "999", "txidBits": 12, "volume": 8000000, "eligibleHash160Values": "18936685379563932117393483083641243932815583", "addressTrials": 77178.32387436317, "addressWorkBits": 16.23590809193857, "txidTrials": 4096, "nominalElapsedMonths": 29.70707728743144, "nominalIntervalMonths": 2.754689550573389, "postGraceWeightNumerator": "359497298635721610000000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 17, "scriptHashRule": "7777[0-7]", "scriptHashTrials": "131072", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 18, "addressRule": "1Chic", "compactAddressRule": "1Chic", "txidRule": "9999", "txidBits": 16, "volume": 16000000, "eligibleHash160Values": "326494575509722967541266949717952481600268", "addressTrials": 4476342.784713063, "addressWorkBits": 22.093889087066145, "txidTrials": 65536, "nominalElapsedMonths": 32.73723579306217, "nominalIntervalMonths": 3.030158505630728, "postGraceWeightNumerator": "405447028499293771000000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 23, "scriptHashRule": "77777[67]", "scriptHashTrials": "8388608", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 19, "addressRule": "1Chick", "compactAddressRule": "1Chick", "txidRule": "99999", "txidBits": 20, "volume": 32000000, "eligibleHash160Values": "5629216819133154612780464650309525544831", "addressTrials": 259627881.5133577, "addressWorkBits": 27.95187008219372, "txidTrials": 1048576, "nominalElapsedMonths": 36.07041014925597, "nominalIntervalMonths": 3.3331743561938008, "postGraceWeightNumerator": "455991731349223148100000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 28, "scriptHashRule": "7777777", "scriptHashTrials": "268435456", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 20, "addressRule": "1Chicke", "compactAddressRule": "1Chicke", "txidRule": "999999", "txidBits": 24, "volume": 64000000, "eligibleHash160Values": "97055462398847493323801114660509061118", "addressTrials": 15058417127.774746, "addressWorkBits": 33.809851077321284, "txidTrials": 16777216, "nominalElapsedMonths": 39.73690194106915, "nominalIntervalMonths": 3.666491791813181, "postGraceWeightNumerator": "511590904484145462910000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 34, "scriptHashRule": "77777777[4-7]", "scriptHashTrials": "17179869184", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 21, "addressRule": "1Chicken", "compactAddressRule": "1Chicken", "txidRule": "9999999", "txidBits": 28, "volume": 128000000, "eligibleHash160Values": "1673370041359439540065536459663949330", "addressTrials": 873388193410.9353, "addressWorkBits": 39.66783207244886, "txidTrials": 268435456, "nominalElapsedMonths": 43.77004291206365, "nominalIntervalMonths": 4.0331409709944985, "postGraceWeightNumerator": "572749994932560009201000000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 40, "scriptHashRule": "7777777777", "scriptHashTrials": "1099511627776", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 22, "addressRule": "1ChickenN", "compactAddressRule": "1ChickenN", "txidRule": "99999999", "txidBits": 32, "volume": 256000000, "eligibleHash160Values": "28851207609645509311474766545930162", "addressTrials": 50656515217834.24, "addressWorkBits": 45.52581306757642, "txidTrials": 4294967296, "nominalElapsedMonths": 48.2064979801576, "nominalIntervalMonths": 4.436455068093949, "postGraceWeightNumerator": "640024994425816010121100000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 46, "scriptHashRule": "77777777777[4-7]", "scriptHashTrials": "70368744177664", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 23, "addressRule": "1ChickenNu", "compactAddressRule": "1ChickenNu", "txidRule": "999999999", "txidBits": 36, "volume": 512000000, "eligibleHash160Values": "497434613959405332956461492171211", "addressTrials": 2938077882634386.0, "addressWorkBits": 51.383794062704, "txidTrials": 68719476736, "nominalElapsedMonths": 53.08659855506094, "nominalIntervalMonths": 4.880100574903343, "postGraceWeightNumerator": "714027493868397611133210000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 52, "scriptHashRule": "7777777777777", "scriptHashTrials": "4503599627370496", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 24, "addressRule": "1ChickenNug", "compactAddressRule": "1ChickenNug", "txidRule": "9999999999", "txidBits": 40, "volume": 1024000000, "eligibleHash160Values": "8576458861369057464766577451229", "addressTrials": 1.704085171927944e+17, "addressWorkBits": 57.241775057831575, "txidTrials": 1099511627776, "nominalElapsedMonths": 58.45470918745462, "nominalIntervalMonths": 5.368110632393678, "postGraceWeightNumerator": "795430243255237372246531000", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 58, "scriptHashRule": "77777777777777[4-7]", "scriptHashTrials": "288230376151711744", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 25, "addressRule": "1ChickenNugg", "compactAddressRule": "1ChickenNugg", "txidRule": "99999999999", "txidBits": 44, "volume": 2048000000, "eligibleHash160Values": "147869980368432025254596162953", "addressTrials": 9.883693997182075e+18, "addressWorkBits": 63.09975605295915, "txidTrials": 17592186044416, "nominalElapsedMonths": 64.35963088308766, "nominalIntervalMonths": 5.904921695633046, "postGraceWeightNumerator": "884973267580761109471184100", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 64, "scriptHashRule": "7777777777777777", "scriptHashTrials": "18446744073709551616", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 26, "addressRule": "1ChickenNugge", "compactAddressRule": "1ChickenNugge", "txidRule": "999999999999", "txidBits": 48, "volume": 4096000000, "eligibleHash160Values": "2549482420145379745768899361", "addressTrials": 5.732542518365604e+20, "addressWorkBits": 68.95773704808671, "txidTrials": 281474976710656, "nominalElapsedMonths": 70.85504474828402, "nominalIntervalMonths": 6.49541386519635, "postGraceWeightNumerator": "983470594338837220418302510", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 69, "scriptHashRule": "77777777777777777[0-7]", "scriptHashTrials": "590295810358705651712", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 }, { "stage": 27, "addressRule": "1ChickenNugget", "compactAddressRule": "1ChickenNugget", "txidRule": "9999999999999", "txidBits": 52, "volume": 8192000000, "eligibleHash160Values": "43956593450782409409808611", "addressTrials": 3.32487466065205e+22, "addressWorkBits": 74.81571804321429, "txidTrials": 4503599627370496, "nominalElapsedMonths": 78.0, "nominalIntervalMonths": 7.144955251715985, "postGraceWeightNumerator": "1091817653772720942460132761", "postGraceWeightDenominator": "1091817653772720942460132761", "scriptHashBits": 75, "scriptHashRule": "777777777777777777[67]", "scriptHashTrials": "37778931862957161709568", "spendAccountingMode": "qualifying_version_1_txids_only", "requiredTransactionVersion": 1 } ], "calculationNotes": { "addressTrials": "2^160 / eligibleHash160Values; all mainnet Base58Check encodings are counted, including checksum constraints; private-key search assumes uniform HASH160 outputs", "txidTrials": "2^txidBits; assumes uniformly distributed valid transaction candidates, restricted to version 1 from stage 13; other versions cannot qualify then.", "nominalElapsedMonths": "6 + 72 times the exact post-grace cumulative weight fraction; a review display, not a calendar-month activation rule", "calendarRule": "T1=T0+6 calendar months; T27=T0+78 calendar months; intermediate eligibility gates use ceiling integer-second interpolation. Actual activations additionally require fresh deterministic 14-day MTP notice rounds and a following block.", "rounding": "Expected trials and nominal month displays are nonnormative approximations; stage predicates, volume thresholds and time formulas are exact", "jointSearch": "An address or script can be ground once and held fixed while valid transaction candidates are varied; do not multiply those columns as the cost of this staged strategy. Satisfying both key-family filters is a separate combined search.", "scriptHashTrials": "2^scriptHashBits; exact integer encoded as decimal text, assuming uniform usable script HASH160 candidates; this is candidate count, not equivalent CPU time." }, "brcNumber": 234, "profileVersion": 1, "activationRule": "Freeze the highest eligible target when no notice is pending; activate it in the accepted child of a block whose MTP reaches the notice deadline. Higher targets wait for a new round.", "reorganizationPolicy": "Accepted-chain replay recomputes the anchor, volume, frozen notice rounds, stages, admissions and spend accounting; orphaned state has no continuing authority. A replacement round can already have completed when first observed; never restart it or require past provider publication.", "recoveryRetentionRule": "SHOULD retain rollback/recovery data for at least 100 accepted descendants of its retirement event. MUST disclose chosen retention and risks. This is not a mandatory purge rule. Missing recovery data requires unavailable responses until verified reconstruction.", "recommendedRecoveryRetentionBlocks": 100, "noticePeriodSeconds": 1209600, "noticeClock": "Accepted-chain MTP; 14 days = 1209600 seconds. Each actual contraction has a fresh frozen-target notice round. No elapsed wall-clock warning is guaranteed.", "noticeAuthority": "Network state derived solely from the accepted chain; no provider publication, acknowledgment, local timer or entry delay is required to start, complete or activate a round.", "noticeStatus": "A verified accepted tip is in a notice round iff it has a pending round. Remaining chain time is max(0, deadline-MTP(tip)); zero still awaits the following accepted block. This describes algorithmic state, not mandatory API fields or a status interface.", "scriptHashDefinition": "RIPEMD160(SHA256(exact locking-script bytes)), conventional 40-hex-character digest order; no byte reversal.", "scriptHashWorkRule": "Smallest integer b such that eligibleHash160Values * 2^b >= 2^160; match b leading bits of repeated hexadecimal 7. Address work <= script-hash work < 2 * address work.", "scope": "Minimum free query-availability and observation guarantees; no mandatory physical deletion or restriction on paid/broader products.", "calendarFinishMeaning": "78 months is the last calendar eligibility gate. Earliest activation also includes the 14-day chain-time notice round and a following accepted block.", "snapshotRule": "Current stage governs free query-key eligibility; the as-of block stage governs historical ledger guarantees. Older verified stage-0-to-12 snapshots may remain covered only as of their accepted block, unambiguously distinguished in the existing delivery context or documentation. No new operation or metadata fields are required.", "ledgerViewRule": "Baseline admissions and required debits are canonical for the same key family, key and accepted snapshot. Extra validated nonqualifying spends affect only a separately offered enhanced guarantee, using existing service arrangements. No view selector, revision identifier, pagination format or API change is required.", "conformanceMeaning": "Availability of the required in-scope data and fulfillment of the defined spend-accounting guarantees, independent of any API, wire format or delivery method. No provider-specific API defines conformance.", "retrievalCapsRule": "Declared historical windows and record-count caps are allowed for TXID retrieval and address/script-hash history. Providers document the selection rule and its stage/filter/reorg interaction and make all records within that promise available. An offered output/balance ledger remains complete for every admitted output while its query key is eligible, regardless of retrieval caps.", "providerWithdrawalRule": "Individual closure, paid-only conversion, withdrawal of an offered operation/family or changes to declared retrieval/history caps follow existing provider service terms. Providers communicate changes and cease withdrawn guarantee claims. No additional BRC minimum notice period, local timer or new API is imposed; accepted-chain stage and notice state remain unchanged.", "transactionVersionRule": "Stages 0-12 add no transaction-version restriction. From stage 13, every TXID-filtered operation requires decoded serialized version == 1 as well as the prefix. Current retrieval/history uses current stage; admission/spends use event stage. Earlier admitted outputs and debits survive, including other versions; all-version backfill is required on replay below 13. Volume counts remain all-version.", "volumeRule": "V(H0)=0; V(B)=V(parent)+numberOfNonCoinbaseTransactions(B) for accepted blocks after H0=1000000. Count all versions/prefixes, one per transaction entry, irrespective of size/value/inputs/outputs/fees; exclude coinbase, mempool, rejected and orphaned entries. Include runway, waiting periods and accepted tip without extra confirmation depth. Never reset at stages, adoption or restart; thresholds are absolute since anchor. Reorganizations remove old contributions and add replacement contributions, potentially lowering the total. Filtered feeds alone cannot supply this count; disclose an all-version, unfiltered count source bound to block hashes/ancestry." }