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fix(dash)!: keep the type byte of quorum types this crate does not know - #1308
Follow-up to #1200. This gap was listed in the handoff comment on #1205 (#1205 (comment)): "an unknown LLMQType re-encodes as 0, so the quorum root stops matching once Core mines a new quorum type".
Problem
LLMQType decoded every type byte it had no variant for as LlmqtypeUnknown, and encoded that back as 0. A commitment's entry hash is the hash of its re-encoding (QuorumEntry::calculate_entry_hash), so for a commitment of a type Dash Core adds later it is not the hash Core puts in the coinbase's merkleRootQuorums (::SerializeHash(commitment), src/evo/cbtx.cpp).
Since #1200, verify_coinbase_roots refuses every list whose rebuilt roots don't match. So once a network mines the first commitment of a new quorum type, every masternode list is refused, and masternode sync stops for every client until a release of this library learns the type. Core develop defines no new type today, so this is about the next one. Two unknown-type commitments with the same quorum hash also shared one map key.
Fix
LlmqtypeUnknown keeps its type byte: LlmqtypeUnknown(u8) = 0 (the enum becomes #[repr(u8)]).
Every byte without a variant decodes as LlmqtypeUnknown(b), byte 0 included. Dash Core gives byte 0 no meaning: no network defines it, and LLMQ_NONE is 0xff.
Every byte encodes back to itself, so entry and commitment hashes are Core's, however many new types a list holds.
The variant stays first. Bincode writes a variant's position, so every named type keeps its encoding, and stored dash-spv engine snapshots and the bincode fixtures still decode. A type without a name writes position 0 and then its byte. Tests pin each named type's position and serde name.
A quorum type is its byte.PartialEq, Ord and Hash go by index(), so LlmqtypeUnknown(b) for a byte that has a name is that variant.
Without this, a list stored while a type had no name keeps its quorums under LlmqtypeUnknown(b). Diffs from a later release that names the type would then fail to delete them, and the list would stop matching its coinbase for good.
params() goes by the byte: the devnet type takes its runtime parameters, a type dash-params defines takes its fixed ones (even before this enum names it), and any other type takes devnet parameters, as before. This removes an expect.
Display and Network::should_skip_quorum_type go by the byte too.
The quorum modifier hashes the type as one byte.LLMQModifierType::build_llmq_hash wrote the type as a CompactSize. Dash Core hashes llmqParams.type as the one byte of its uint8_t enum (GetHashModifierFromWorkBlock, src/llmq/utils.cpp).
The two agree up to byte 252, so no named type's modifier changes.
From byte 253 on, the CompactSize is three bytes (fd fd 00 for 253), so members of such a type would have been picked with a modifier other than Core's.
A quorum list holding a commitment twice is refused. Doubling the last leaf of an odd level leaves the merkle root unchanged (the CVE-2012-2459 shape). Dash Core refuses such a root (mutated-calc-cbtx-quorummerkleroot). This check is stricter than Core's: it refuses any duplicate, which an honest list never holds.
Casts:as u8 casts of LLMQType (hash_types.rs, ephemerealdata) now use index().
Design choice
The alternative was #1206's approach: when the quorum root mismatches, try each of the 242 unknown type bytes until it matches, bounded at 64 unknown commitments and 256 in all. It was rejected for three reasons.
The bound counts commitments, but a peer controls their size. A bitset may hold up to 1M bits, so a commitment can be about 250 KB. That makes a crafted diff cost about 1.2 GB of SHA-256 under the engine's write lock. CoinbaseCommitmentMismatch is not banned, and the target is asked for again.
It still refuses two new types at once, or two that share a quorum hash.
It works around a lossy encoding instead of fixing it.
Keeping the byte is exact. Its cost is the API break below, in a release that already breaks API: #1200 itself is not in v0.45.0.
Red → green
Each test was committed before its fix and run against the unfixed code:
Test
Before the fix
After
every_type_byte_encodes_back_to_itself
on dev: left: [0] right: [7]
passes
verify_coinbase_roots_of_quorums_of_unknown_types "as committed": commitments of types 200 and 201 at once
on dev: left: Err(CoinbaseCommitmentMismatch(0x0000…a79b98)) right: Ok(())
passes; the same list served under type 202 is refused
a_type_is_its_byte checks equality, order, hash, parameters and name for all 256 bytes.
Breaking
LLMQType::LlmqtypeUnknown becomes LlmqtypeUnknown(u8), and the enum becomes #[repr(u8)]. Code that builds or matches it needs the byte, e.g. LlmqtypeUnknown(0) or LlmqtypeUnknown(_).
as casts of an LLMQType no longer compile. Use index() or u8::from.
PartialEq, Ord and Hash are by type byte. Named variants compare and order as before. A pattern does not see through this: a value held as LlmqtypeUnknown(b) for a named byte misses that name's arm. Compare with ==, or match on LLMQType::from(t.index()).
LlmqtypeUnknown serializes as a newtype variant:
serde JSON writes {"LlmqtypeUnknown":200} where dev wrote "LlmqtypeUnknown", and dev's "LlmqtypeUnknown" no longer deserializes.
serde_json refuses a newtype variant as a map key, so a MasternodeList holding a quorum of an unknown type does not serialize to JSON. On dev such a list failed its coinbase check, so it never existed. No consumer in this workspace or in Platform serializes one to JSON.
bincode writes [0, b] where dev wrote [0]; named types keep their bytes. A dev engine snapshot could hold [0] only for a list its coinbase check refused, and the snapshot format is not in v0.45.0.
Platform uses only LLMQType::from(u8), which is unchanged.
cargo test --workspace --all-features --no-fail-fast with the dashd regtest env: 2526 passed, 0 failed, including dashd_masternode 11/11 and dashd_sync 38/38.
Skipped: the 8 tests dev already ignores (3 #[ignore], 5 ignore doctests).
Notes
Out of scope: unknown-type quorums are validated with devnet parameters, marked invalid, and may get their work-block lists fetched. That is the same as for LlmqtypeUnknown on dev.
For Platform: a proof's quorum_type must be checked against the platform type. Converting a u32 with as u8 would alias types.
Self-review — address xdustinface requested changes, then post /self-reviewed
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Approvals
files with no dedicated owner (dash/src/blockdata/transaction/mod.rs, dash/src/blockdata/transaction/special_transaction/quorum_commitment.rs, dash/src/ephemerealdata/chain_lock.rs and 7 more) — QuantumExplorer or ZocoLini or xdustinface
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Summary by CodeRabbit
Bug Fixes
Quorum types now retain their original byte values, including unrecognized types, across decoding, serialization, and related hash calculations.
Quorum commitment validation now rejects duplicate entries, even when they would otherwise produce a matching root.
Quorum deletion and network activation checks now correctly account for unknown types that share a known type’s byte value.
…es not know
`LLMQType` decodes every type byte it has no variant for as
`LlmqtypeUnknown`, and encodes that back as 0. A commitment's entry hash
is the hash of its re-encoding, so for a commitment of a type Dash Core
adds later it is not the hash Core puts in the coinbase's
`merkleRootQuorums`. Once a network mines such a commitment,
`verify_coinbase_roots` would refuse every masternode list, and
masternode sync would stop until a release of this library learned the
type.
- Every type byte has to encode back to itself.
- A list holding commitments of types 200 and 201 has to match a quorum
root over Dash Core's hashes of them, and must be refused when one of
them is served under type 202.
`every_type_byte_encodes_back_to_itself` fails on dev: byte 7 encodes as
0. So does `verify_coinbase_roots_of_quorums_of_unknown_types`
"as committed", with `CoinbaseCommitmentMismatch`. The next commit fixes
both.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`LLMQType` decoded every type byte it had no variant for as
`LlmqtypeUnknown`, and encoded that back as 0. So the entry hash of a
commitment of a type Dash Core adds later was not the hash Core puts in
the coinbase's `merkleRootQuorums`. Once a network mined such a
commitment, `verify_coinbase_roots` would have refused every masternode
list, and masternode sync would have stopped for every client until a
release of this library learned the type.
`LLMQType` gains `Unknown(u8)`, which keeps any byte without a variant
(byte 0 still decodes as `LlmqtypeUnknown`). Every byte now encodes back
to itself. That keeps the entry and commitment hashes of such a
commitment Dash Core's, however many new types a list holds. Commitments
of two unknown types also no longer share a key in a list's quorum map.
`Unknown(_)` takes devnet parameters, as `LlmqtypeUnknown` does. A
quorum commitment transaction of an unknown type now decodes typed
rather than raw.
The new variant comes last. Bincode writes a variant's position, so
every existing value keeps its encoding, and stored masternode engine
snapshots still load. Derived ordering is by discriminant, so existing
types keep their order and `Unknown(_)` sorts after all of them.
The alternative, trying each unknown byte until the quorum root matched,
was rejected. Its work grows with commitments a peer can make about
250 KB each. Its refusals of a mismatch are not banned, so a peer could
send such diffs again and again. And it fails with two new types at
once.
Test would have caught this in CI:
`every_type_byte_encodes_back_to_itself` and
`verify_coinbase_roots_of_quorums_of_unknown_types` "as committed".
✖ before the fix (byte 7 encoded as 0, `CoinbaseCommitmentMismatch`),
✔ after.
BREAKING CHANGE: `LLMQType` gains the `Unknown(u8)` variant and becomes
`#[repr(u8)]`. Exhaustive matches need an arm for it, `as` casts of an
`LLMQType` no longer compile (use `index()` or `u8::from`), and
`Unknown(b)` serializes with serde as a newtype variant. serde_json
refuses a newtype variant as a map key, so a `MasternodeList` holding a
quorum of an unknown type no longer serializes to JSON.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…type's
A list built while this crate has no name for a quorum type keeps that
type's quorums under `LLMQType::Unknown(b)`. The dash-spv engine stores
lists in its snapshot. Once a later release names the type, its diffs
delete those quorums under the name. With the derived comparisons,
`Unknown(b)` is not that name, so the deletion missed. The quorum would
stay in the list forever, every later list would stop matching its
coinbase, and masternode sync would stop until the snapshot was dropped.
`a_quorum_kept_under_an_unnamed_type_byte_is_deleted_by_its_name` fails
on top of the previous commit: the quorum is still there. The next commit
fixes it.
`bincode_writes_every_type_at_its_position` passes already. It pins that
every named type keeps the bincode position stored snapshots hold, with
`Unknown` after them all.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`LLMQType` derived its comparisons, so `Unknown(b)` and the variant that
names `b` were different keys. A list stored while a type had no name
keeps that type's quorums under `Unknown(b)`. Once a release named the
type, diffs naming it could not delete those quorums, and the list would
stop matching its coinbase for good.
A quorum type is now its byte. `PartialEq`, `Ord` and `Hash` go by
`index()`, so `Unknown(b)` is the variant that names `b`, in a map as
anywhere else. The named types keep their order, and an unnamed byte
sorts at its value. `params()` and `Display` also go by the byte:
- the devnet type takes its runtime parameters;
- a type Dash Core defines takes its fixed ones from dash-params, even
before this enum names it;
- any other type takes devnet parameters, as before.
This also removes the `expect` that a named type always has parameters.
Bincode and serde encodings are unchanged.
So `Unknown(b)` built for a named byte, which serde, bincode or a
literal can do, is no longer a second key for the same type.
Test would have caught this in CI:
`a_quorum_kept_under_an_unnamed_type_byte_is_deleted_by_its_name`.
✖ before the fix (the quorum stayed), ✔ after. `a_type_is_its_byte`
covers every byte.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A list keys each commitment by the type and quorum hash the commitment
hashes. So a list built from diffs never holds one twice, but a list
edited through its public maps, or restored from damaged storage, can.
When the doubled leaf is the last one of an odd level, the merkle root
of the sorted commitment hashes stays as it was (the shape of
CVE-2012-2459). Dash Core refuses such a root
(`mutated-calc-cbtx-quorummerkleroot`).
This test fails without that check: the list holding the commitment
twice matches the coinbase. The next commit adds the check.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`verify_coinbase_roots` compared the merkle root of a list's sorted
commitment hashes with the coinbase's `merkleRootQuorums`. Doubling the
last leaf of an odd level does not change that root. So a list holding a
commitment twice, under a second quorum hash, matched the coinbase of the
list without it.
A list whose sorted commitment hashes hold a duplicate is now refused.
That is stricter than Dash Core, which flags a root as mutated only when
equal hashes are paired in its tree
(`mutated-calc-cbtx-quorummerkleroot`). But any duplicate is enough to
keep a root while changing the list, and an honest list never holds one:
a commitment's map key is its type and quorum hash, and both are in the
bytes it hashes.
Test would have caught this in CI:
`a_quorum_list_holding_a_commitment_twice_is_refused`. ✖ before the fix
(the list holding the commitment twice matched), ✔ after.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`a_type_is_its_byte` compared the parameters of `Unknown(b)` with those of
the named type. For a byte that takes devnet parameters, both reads go
through the devnet override, which another test in the same binary sets.
If it was set between the two reads, the test would fail by chance. Only
fixed parameters are compared now.
The doc of `Unknown` now says that a value restored from storage stays
`Unknown` after a release names its byte, so types are compared with `==`
rather than matched by name.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
LLMQType now retains unknown protocol bytes and uses them for identity and encoding. Quorum identifiers and modifier hashes use the type byte. Network matching, quorum deletion tests, and coinbase-root verification cover unknown types and duplicate commitments.
Changes: LLMQ Type Byte Handling
Layer / File(s)
Summary
Preserve LLMQ type byte identity dash/src/sml/llmq_type/mod.rs, dash/src/sml/llmq_type/network.rs, dash/src/sml/masternode_list/apply_diff.rs
LLMQType stores unknown type bytes and uses byte-based equality, ordering, hashing, display, and parameter lookup. Network matching and a deletion regression test cover unknown variants with matching type bytes.
Use type bytes in quorum encodings dash/src/ephemerealdata/chain_lock.rs, dash/src/ephemerealdata/instant_lock.rs, dash/src/hash_types.rs, dash/src/sml/quorum_entry/quorum_modifier_type.rs, dash/src/blockdata/transaction/...
Sign IDs and quorum ordering hashes use the type index. Modifier hashes encode the type as one byte. Commitment tests use the unknown variant with byte 0 and expect typed decoding.
Verify coinbase quorum roots dash/src/sml/masternode_list/merkle_roots.rs
For payload version 2 or newer, verification hashes the listed quorum hashes and rejects adjacent duplicates or a root mismatch. Tests cover unknown type bytes and duplicate commitments.
No concrete issue remains that should block merging after normal checks.
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The title clearly and concisely identifies the main change: preserving unknown quorum-type bytes in Dash.
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Resolves the conflict with #1306 in `verify_coinbase_roots`: its doc
names both the newer coinbase payloads and the duplicate refusal, and the
tests import both PRs' items.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Make the existing first variant LlmqtypeUnknown(u8) = 0 instead of adding Unknown(u8) at the end.
Byte 0 is not special in Core (no network defines it, LLMQ_NONE is 0xff), so LlmqtypeUnknown and Unknown(b) mean the same thing, and From<u8> needs a 0 => special case to pick between them. Keeping it at position 0 leaves every named type's bincode position untouched, so stored snapshots and the bincode fixtures still decode. I tried it: dashcore --lib --all-features 679/679, dash-spv --lib 630/630, clippy clean. It also drops the "variants added later go after this one" rule, and the implicit discriminant 108 that Unknown gets now, which makes a later = 108 variant fail with E0081.
Write the type in build_llmq_hash with llmq_type.consensus_encode(&mut writer), not VarInt.
Core hashes llmqParams.type as one raw byte (src/llmq/utils.cppGetHashModifierFromWorkBlock, uint8_t enum via serialize.h). VarInt writes fd fd 00 for 253, so member selection would be wrong for a type at 253 to 255. This PR already rewrites both lines in quorum_modifier_type.rs and the PR is about keeping unknown type bytes exact, so please fix it here and update the two "encoded as a VarInt" doc lines.
`LlmqtypeUnknown` becomes `LlmqtypeUnknown(u8) = 0` and replaces the
`Unknown(u8)` variant this branch added at the end. Dash Core gives
byte 0 no meaning: no network defines it, and `LLMQ_NONE` is 0xff. So
the two variants meant the same thing, and `From<u8>` needed a case for
byte 0 to pick between them.
The variant stays first, so every named type keeps its bincode position
and stored engine snapshots and the bincode fixtures still decode. A
type without a name writes position 0 and then its byte. No rule is left
about where later variants go, and no implicit discriminant 108 is left
for a later `= 108` variant to collide with.
Equality, order, hash, `params()` and `Display` still go by the byte.
Serde keeps every variant name; `LlmqtypeUnknown` becomes a newtype
variant.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Dash Core hashes `llmqParams.type` into the quorum modifier as the one
byte of its `uint8_t` enum (`GetHashModifierFromWorkBlock`,
src/llmq/utils.cpp, through the enum `Serialize` of serialize.h).
`LLMQModifierType::build_llmq_hash` writes it as a CompactSize, which is
three bytes from 253 on, `fd fd 00` for 253. Members of a quorum of such
a type would be selected by another modifier than Core's.
The test builds Core's bytes by hand for every type byte, in the block
hash form and the signature form. It fails on this commit:
assertion `left == right` failed: type byte 253, block hash form
left: 0xe09e967b64864e329c7508aa684bc063591e113e5064a102f6223eb3f02b5329
right: 0x604054d4c569576e8366cc184ef1b9da27099875c4e693acdb38a7ca21ee7f8f
The next commit fixes it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`LLMQModifierType::build_llmq_hash` wrote the quorum type as a
CompactSize. Dash Core hashes `llmqParams.type` as the one byte of its
`uint8_t` enum (`GetHashModifierFromWorkBlock`, src/llmq/utils.cpp). The
two encodings agree up to byte 252, which covers every type this crate
names, so no known type's modifier changes. From byte 253 on the
CompactSize is three bytes, and members of such a type would have been
selected by another modifier than Core's.
The type now goes through its `Encodable`, which writes its byte.
`the_modifier_hashes_the_type_as_one_byte` fails on the previous commit
at type byte 253 and passes on this one: ✖ before the fix, ✔ after.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A type is its byte, and `LlmqtypeUnknown(b)` for a named byte equals the
named variant. `Network::should_skip_quorum_type` matches the Platform
types by name, which a pattern does not see through, so
`LlmqtypeUnknown(4)` on mainnet below Platform activation is not skipped
while `Llmqtype100_67` is. Such a value comes from a stored list or a
caller that builds the variant.
The test fails on this commit:
assertion failed: Network::Mainnet.should_skip_quorum_type(&LLMQType::LlmqtypeUnknown(4),
The next commit fixes it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
`Network::should_skip_quorum_type` now matches on the named form of the
type, `LLMQType::from(llmq_type.index())`, as `Display` does. A Platform
type held as `LlmqtypeUnknown` with its byte is skipped before
activation like the named variant, so the function agrees with the
type's `==`.
`a_platform_type_held_as_its_byte_is_skipped_before_activation` fails
on the previous commit and passes on this one: ✖ before the fix, ✔
after.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The bincode test paired positions with the named types in declaration
order, so a type declared in the middle would have moved every later
position without the test noticing. Each named type now carries its
position, and the test also decodes each encoding back to its type.
Stored masternode engine snapshots hold those positions. A new test pins
the serde name of each named type, and `LlmqtypeUnknown` as a newtype
variant holding its byte.
Test-only change: no behaviour changes, so there is no red run.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Unknown(u8) is gone. From<u8> maps every byte without a name to LlmqtypeUnknown(b), byte 0 included, so the case for 0 is gone too.
The variant stays first, so named types keep bincode positions 1–14 and the fixtures and stored snapshots still decode. A type without a name writes [0, b].
With it went the "variants added later go after this one" rule and the implicit discriminant 108.
Eq, Ord, Hash, params() and Display still go by the byte, and a_type_is_its_byte still checks all 256 bytes. The duplicate-leaf refusal is unchanged. Serde names are unchanged; LlmqtypeUnknown is now a newtype variant.
2. One byte in build_llmq_hash:eb05f2e (test), 32e9ae5 (fix)
Both forms now write the type with llmq_type.consensus_encode(&mut writer), and the two doc lines say "as its one byte".
the_modifier_hashes_the_type_as_one_byte builds Core's bytes by hand for every type byte, in the block hash form and the signature form.
assertion `left == right` failed: type byte 253, block hash form
left: 0xe09e967b64864e329c7508aa684bc063591e113e5064a102f6223eb3f02b5329
right: 0x604054d4c569576e8366cc184ef1b9da27099875c4e693acdb38a7ca21ee7f8f
On 32e9ae5 it passes. Bytes 0–252 hash the same either way, so no named type's modifier changes.
Also, from our own review of the new shape:
32235b4 (test) and ea1bcb2 (fix): Network::should_skip_quorum_type matched the Platform types by name. A pattern doesn't see through the byte-wise ==, so LlmqtypeUnknown(4) on mainnet wasn't skipped before Platform activation. It now matches on LLMQType::from(t.index()).
091abe4: the bincode test now pins each named type's position explicitly and decodes each one back. Before, it zipped positions with the declaration order, so a type inserted in the middle would have gone unnoticed. A serde test pins every name.
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Follow-up to #1200. This gap was listed in the handoff comment on #1205 (#1205 (comment)): "an unknown
LLMQTypere-encodes as 0, so the quorum root stops matching once Core mines a new quorum type".Problem
LLMQTypedecoded every type byte it had no variant for asLlmqtypeUnknown, and encoded that back as 0. A commitment's entry hash is the hash of its re-encoding (QuorumEntry::calculate_entry_hash), so for a commitment of a type Dash Core adds later it is not the hash Core puts in the coinbase'smerkleRootQuorums(::SerializeHash(commitment), src/evo/cbtx.cpp).Since #1200,
verify_coinbase_rootsrefuses every list whose rebuilt roots don't match. So once a network mines the first commitment of a new quorum type, every masternode list is refused, and masternode sync stops for every client until a release of this library learns the type. Core develop defines no new type today, so this is about the next one. Two unknown-type commitments with the same quorum hash also shared one map key.Fix
LlmqtypeUnknownkeeps its type byte:LlmqtypeUnknown(u8) = 0(the enum becomes#[repr(u8)]).LlmqtypeUnknown(b), byte 0 included. Dash Core gives byte 0 no meaning: no network defines it, andLLMQ_NONEis 0xff.PartialEq,OrdandHashgo byindex(), soLlmqtypeUnknown(b)for a byte that has a name is that variant.LlmqtypeUnknown(b). Diffs from a later release that names the type would then fail to delete them, and the list would stop matching its coinbase for good.params()goes by the byte: the devnet type takes its runtime parameters, a type dash-params defines takes its fixed ones (even before this enum names it), and any other type takes devnet parameters, as before. This removes anexpect.DisplayandNetwork::should_skip_quorum_typego by the byte too.LLMQModifierType::build_llmq_hashwrote the type as a CompactSize. Dash Core hashesllmqParams.typeas the one byte of itsuint8_tenum (GetHashModifierFromWorkBlock, src/llmq/utils.cpp).fd fd 00for 253), so members of such a type would have been picked with a modifier other than Core's.mutated-calc-cbtx-quorummerkleroot). This check is stricter than Core's: it refuses any duplicate, which an honest list never holds.as u8casts ofLLMQType(hash_types.rs, ephemerealdata) now useindex().Design choice
The alternative was #1206's approach: when the quorum root mismatches, try each of the 242 unknown type bytes until it matches, bounded at 64 unknown commitments and 256 in all. It was rejected for three reasons.
CoinbaseCommitmentMismatchis not banned, and the target is asked for again.Keeping the byte is exact. Its cost is the API break below, in a release that already breaks API: #1200 itself is not in v0.45.0.
Red → green
Each test was committed before its fix and run against the unfixed code:
every_type_byte_encodes_back_to_itselfleft: [0] right: [7]verify_coinbase_roots_of_quorums_of_unknown_types"as committed": commitments of types 200 and 201 at onceleft: Err(CoinbaseCommitmentMismatch(0x0000…a79b98)) right: Ok(())a_quorum_kept_under_an_unnamed_type_byte_is_deleted_by_its_namethe quorum is deletedfaileda_quorum_list_holding_a_commitment_twice_is_refusedleft: Ok(()) right: Err(CoinbaseCommitmentMismatch(…))the_modifier_hashes_the_type_as_one_byte: Core's bytes, built by hand, for every type byte in both modifier formstype byte 253, block hash form,left: 0xe09e…5329 right: 0x6040…7f8fa_platform_type_held_as_its_byte_is_skipped_before_activationassertion failed: Network::Mainnet.should_skip_quorum_type(&LLMQType::LlmqtypeUnknown(4), …a_type_is_its_bytechecks equality, order, hash, parameters and name for all 256 bytes.Breaking
LLMQType::LlmqtypeUnknownbecomesLlmqtypeUnknown(u8), and the enum becomes#[repr(u8)]. Code that builds or matches it needs the byte, e.g.LlmqtypeUnknown(0)orLlmqtypeUnknown(_).ascasts of anLLMQTypeno longer compile. Useindex()oru8::from.PartialEq,OrdandHashare by type byte. Named variants compare and order as before. A pattern does not see through this: a value held asLlmqtypeUnknown(b)for a named byte misses that name's arm. Compare with==, or match onLLMQType::from(t.index()).LlmqtypeUnknownserializes as a newtype variant:{"LlmqtypeUnknown":200}where dev wrote"LlmqtypeUnknown", and dev's"LlmqtypeUnknown"no longer deserializes.MasternodeListholding a quorum of an unknown type does not serialize to JSON. On dev such a list failed its coinbase check, so it never existed. No consumer in this workspace or in Platform serializes one to JSON.[0, b]where dev wrote[0]; named types keep their bytes. A dev engine snapshot could hold[0]only for a list its coinbase check refused, and the snapshot format is not in v0.45.0.LLMQType::from(u8), which is unchanged.Checks (local)
At 091abe4 (head, dev merged in at 839139e):
cargo fmt --all --check, and typos 1.40.0 on the changed files.cargo +1.89 check --workspace --all-features.cargo clippy --workspace --all-targets --all-features -- -D warnings.RUSTDOCFLAGS="-D warnings" cargo doc --workspace --all-features --no-deps.cargo test --workspace --all-features --no-fail-fastwith the dashd regtest env: 2526 passed, 0 failed, includingdashd_masternode11/11 anddashd_sync38/38.#[ignore], 5ignoredoctests).Notes
LlmqtypeUnknownon dev.quorum_typemust be checked against the platform type. Converting au32withas u8would alias types.🤖 Generated with Claude Code
PR Hygiene ·
091abe4/self-revieweddash/src/blockdata/transaction/mod.rs,dash/src/blockdata/transaction/special_transaction/quorum_commitment.rs,dash/src/ephemerealdata/chain_lock.rsand 7 more) — QuantumExplorer or ZocoLini or xdustinfaceWhen every merge requirement is met, the
PR Hygienecheck passes. Reviewer limits do not block merging; other required GitHub checks and protections still apply.Summary by CodeRabbit