replace BIP320 with BIP323 for version rolling limitations#200
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| Standard Jobs are distributed via the [`NewMiningJob`](#5315-newminingjob-server---client) message, which can ONLY be sent via [Standard Channels](#521-standard-channels). | ||
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| Note that Mining Devices with hashrate above 280 TH/s will outrun the true time when rolling the `nTime` field. This is not necessarily a problem, as long as the Job remains valid within the limits defined by the `MAX_FUTURE_BLOCK_TIME` constant of the Bitcoin protocol (2 hours). | ||
| Note that Mining Devices with hashrate above 72 PH/s will outrun the true time when rolling the `nTime` field. This is not necessarily a problem, as long as the Job remains valid within the limits defined by the `MAX_FUTURE_BLOCK_TIME` constant of the Bitcoin protocol (2 hours). |
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Probably worth highlighting this change in the PR description and/or making it a separate commit, including the calculation.
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added to PR description
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close #199
BIP323 was merged:
as discussed in #193, this will allow us to lift Standard Channels HOM hashrate ceiling from ~280TH/s to ~72PH/s
2^(NONCE_BITS + BIP320_VERSION_ROLLING_BITS) = 2^(32 + 16) = 2^48 = ~280TH/s2^(NONCE_BITS + BIP323_VERSION_ROLLING_BITS) = 2^(32 + 24) = 2^56 = ~72PH/swhere
NONCE_BITS = 32andBIP320_VERSION_ROLLING_BITS = 16.The size of the search space for one Standard Job, given a fixed
nTimefield, is2^(NONCE_BITS + BIP323_VERSION_ROLLING_BITS) = ~72PH/s, whereNONCE_BITS = 32andBIP323_VERSION_ROLLING_BITS = 24.