Add ZIP 256: Deployment of Consensus Bug Fixes Between NU6.1 and NU6.2 - #1295
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ZIP number 256 requested. |
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I agree on using zip 256 for this! |
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- Title -> "Version 6 Transaction Format"; drop the fee field; coinbase empty-Orchard-bundle note; reword the Orchard/Ironwood tree/nullifier-set separation. - Sighash: extend the v6 anchor move (effecting -> auth data) to Sapling as well as Orchard and Ironwood; full txid/auth digest trees and the per-node personalization table (with _v6 personalizations where the encoding changed). - Add a "Changes to ZIP 221" section: the Ironwood chain-history MMR node fields (hashEarliest/LatestIronwoodRoot, nIronwoodTxCount) [NU6.3 onward], mirroring the NU5 Orchard fields. - Add a ZIP 209 intro citing [^zip-0209]; add the [^zip-0221], [^zip-0252], [^zip-0244-txiddigest], and [^zip-0244-authorizingdatacommitment] references. - Fix the #openissues internal anchor (MMD strips hyphens). The [0, MAX_MONEY] ZIP 209 change is left as a TODO pending the ZIP 256 update in zcash#1295. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>
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- Title -> "Version 6 Transaction Format"; drop the fee field; coinbase empty-Orchard-bundle note; reword the Orchard/Ironwood tree/nullifier-set separation. - Sighash: extend the v6 anchor move (effecting -> auth data) to Sapling as well as Orchard and Ironwood; full txid/auth digest trees and the per-node personalization table (with _v6 personalizations where the encoding changed). - Add a "Changes to ZIP 221" section: the Ironwood chain-history MMR node fields (hashEarliest/LatestIronwoodRoot, nIronwoodTxCount) [NU6.3 onward], mirroring the NU5 Orchard fields. - Add a ZIP 209 intro citing [^zip-0209]; add the [^zip-0221], [^zip-0252], [^zip-0244-txiddigest], and [^zip-0244-authorizingdatacommitment] references. - Fix the #openissues internal anchor (MMD strips hyphens). The [0, MAX_MONEY] ZIP 209 change is left as a TODO pending the ZIP 256 update in zcash#1295. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>
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have edited README.template instead. Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>
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Retrospectively documents the consensus and denial-of-service bug fixes deployed between the NU6.1 and NU6.2 activations: zcashd v6.12.0 to v6.12.4 and zebra v4.2.0 to v4.5.1. Includes the soft-fork exclusion of Orchard rk = 𝓞_ℙ, conformance fixes restoring zcashd/zebra agreement, and DoS/crash hardening. The Orchard counterfeiting mitigation and NU6.2 itself are documented separately in ZIP 257. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>
ZIP 258: update to be relative to the ZIP 256 changes. Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>
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Merging because it's in the way otherwise. |
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Retrospectively documents the consensus and denial-of-service bug fixes deployed between the NU6.1 and NU6.2 activations: zcashd v6.12.0 to v6.12.4 and zebra v4.2.0 to v4.5.1.
Includes the soft-fork exclusion of Orchard$\mathsf{rk} = \mathcal{O}_{\mathbb{P}}$ , conformance fixes restoring zcashd/zebra agreement, and DoS/crash hardening. The Orchard counterfeiting mitigation and NU6.2 itself will be documented separately in ZIP 257.
This also applies the corresponding change to ZIP 209 directly (since it has already been deployed): the integer-overflow and value-range hardening in zcashd v6.12.1 extends the chain value pool balance rule to the transparent and deferred development fund pools, and additionally requires the total supply (the sum of the pool balances) not to exceed MAX_MONEY. ZIP 258's pending changes to ZIP 209 are updated to be relative to these.
Finally, it corrects
README.template, which a previously merged change had left inconsistent with the generatedREADME.rst(regeneration would otherwise have reverted that change).closes #1294
Filed with the assistance of Claude Opus 4.8 (1M context)