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feat(platform)!: elected moderation team declaration with frozen election parameters and interim mode - #4886

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Sep 21, 2026
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@QuantumExplorer QuantumExplorer commented Sep 21, 2026

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Issue being fixed or feature implemented

Closes #4877. Part of #4865 (decentralized moderation teams), item B1 of the PR split. Protocol version 14 on v4.2-dev, tables edited in place.

A data contract can now declare that its moderators are an elected team: a third ContractModerators variant, Elected(ElectedModerators), next to ContractOwner and AppointedModerators. The declaration is fixed when the contract is created and never changes. No election exists yet: until a team is seated the contract is in its interim, moderated by the interim moderators the declaration names, or by nobody, in which case the moderated document types cannot be used.

Decisions implemented: D3, D5, D6, D7, D8, D17, D18, D19, D20, D25, D47, D62, D64 of #4865; D63 (charter fee maximums) is dropped per Sam, 2026-09-22: a type's actionFees.moderators amount is already the most a team may charge, and a charter charges a share of it.

What was done?

The declaration

"moderation": {
  "banlist": true, "suspensions": true, "warnings": false,
  "moderators": {
    "$type": "elected",
    "joinWindow": 604800,            // seconds, 1 day to 4 weeks, one week when left out
    "voteWindow": 604800,            // the same
    "challengeCoolDown": 1209600,    // seconds, 2 weeks to 3 years, always declared
    "moderatedDocumentTypes": { "post": ["ban", "suspend"] }, // per type: deleteDocuments | ban | suspend | warn
    "interim": { "$type": "notYetUsable" },   // or contractOwner, appointedModerators + identities, or noModeration
    "ownerProtected": false
  }
}
  • Election parameters (D8): join window, vote window and challenge cool-down in seconds as u32, bounded by four new SystemLimits (min/max_contract_moderation_election_window_seconds, min/max_contract_moderation_challenge_cool_down_seconds; 1 day to 4 weeks, 2 weeks to 3 years). The windows default to one week when the JSON leaves them out; the cool-down has no default and is required. Nothing reads them yet.
  • Moderated set (D25, D47, D62): the document types the team moderates, each with the abilities a charter may claim on it (per Sam, 2026-09-21: abilities are per type). Non-empty; each type a document type of the contract; each ability set non-empty and backed by the contract (ban needs the banlist, suspend the suspension list, warn the warning list, deleteDocuments that type flagged canBeDeletedByModerators). The lists stay contract-wide: an ability on a type is what a team may do over the documents of that type.
  • No fee maximums (D63 dropped, D64 kept): the declaration does not price anything. A type's actionFees.moderators amount is the most a team may charge on its actions, a charter charges a share of it (the charter contract's business), and the owner part stays what the type declares, immutable as before. Because a charter can only lower what is charged, the signer's $actionFeeAgreement to the declared amounts never mismatches a seated charter.
  • Interim (D6, D17, D18, D19): contractOwner, appointedModerators (the merged kinds, same authority, same limit, same existence check at create), notYetUsable, or noModeration (per Sam, 2026-09-21: nobody moderates and nobody claims the pot until a team is seated, as under notYetUsable, but the moderated types are used unmoderated meanwhile instead of being blocked). The interim moderators are team(), so they claim the moderators pot as today. Under notYetUsable nobody moderates, nobody claims (the pot accumulates for the team to come), and every document transition of a moderated type is refused.
  • Owner protection (D20): ownerProtected, default false. New ContractModerationConfig::protects() is what the moderation transition checks for ban, suspend, warn and document-deletion targets: whoever may moderate, plus the owner when the flag says so. During the interim the owner is protected whenever it moderates, flag or not.

Consensus changes

  • validate_moderation_config v0 (edited in place, unreleased) now takes the raw document schemas instead of a bool, and checks the elected declaration: every bound, the moderated set, the envelope (unknown type, no action, zero, over MAX_CREDITS), and the interim set through the existing identity_ids() path. Refused with InvalidContractModerationConfigError (10900) and a reason starting with elected moderation:.
  • validate_config_update 2 (edited in place) refuses, with DataContractConfigUpdateError, every change to the declaration and entering or leaving elected moderation. The merged kinds still swap moderators freely.
  • contract_moderation_gate v0 (edited in place) runs the interim block before the lists: on a notYetUsable contract every transition of a moderated type, deletions included, is refused, paid, with new ContractModeratedDocumentTypeNotYetUsableError (41200, new band 41200-41299 for moderation teams; StateError discriminant 137, appended) and its nonce bump, in a block and in the mempool. The lists are read only for the transitions on the other types, and not at all when nothing is left. ContractModerationRefusal.deletions became passed.
  • Create and update state validation check that interim moderators exist through the unchanged identity_ids() route (41110).
  • wasm-dpp2 TypeScript type extended; legacy wasm-dpp gets the error arm. No DAPI or proto change: the declaration travels inside the contract bytes.

My calls, open to change

  1. The interim appointed set is frozen too. The issue says every field is frozen (D8); an interim moderator who loses keys cannot be replaced by the owner, but the owner always moderates in that kind and the interim ends at seating.
  2. notYetUsable and noModeration mean nobody moderates anything, the owner included, and nobody claims the moderators pot. The three interim kinds are exclusive per D6.
  3. The moderated set must be non-empty. A contract that only wants an elected team for bans lists every type.
  4. JSON keys: joinWindow, voteWindow, challengeCoolDown without a unit suffix, like canBeDeletedByModeratorsFor.

Out of scope

The seated team and its gate (H1), the election (H2), charter-priced amounts (F2), the charter contract (C1, #4878). The wasm-sdk, js-evo-sdk, Swift and Kotlin need nothing until a team exists.

Coordination

Rebased over #4872 (warning list), which is why warn is already an ability. H1 (seated team) takes the next key of the contract's other tree and adds the seated-team clause to may_moderate, team and the gate. Keep the variant additive.

How Has This Been Tested?

  • rs-dpp config/moderation/elected.rs: accepted at every bound and refused one second outside each; moderated set empty or unknown, and a non-deletable type accepted; envelope empty or unbacked for each ability; the interim set limit; each interim kind's authority, team, protection and block; JSON and platform-value round trip (a credit amount past 2^53 as a string in JSON), defaults, and every misspelled or misplaced key refused.
  • config/methods/validate_update/v2: an update refused for each of the eight fields and for entering or leaving.
  • state_error.rs: discriminant 137 pinned.
  • rs-drive-abci contract_moderation_gate: the block next to a passing type with one read, and alone with none.
  • rs-drive-abci contract_user_moderation/tests.rs: owner interim (bans, others refused, five refused updates, an update adding a type accepted), appointed interim (moderator and owner ban, stranger refused, both protected, the set is the pot's recipients), notYetUsable (create refused in the mempool and paid in a block, another type accepted, nobody moderates, no recipients), and a create refused for each of six bad declarations while the same one at its minimums is accepted, plus entering by update refused.
  • Run locally: cargo test -p dpp --features json-conversion --lib (moderation, validate_update, state_error), cargo test -p platform-version, cargo test -p drive-abci --lib (moderation, gate, fee claim, action fees, contract create and update), cargo check --tests on drive and both wasm crates, clippy and fmt. CI does the rest.

Breaking Changes

Consensus (protocol version 14, unreleased): a new ContractModerators variant in the contract's bincode config, a new SystemLimits group, a new StateError variant (41200), and ContractModerationConfig::validate takes the document schemas instead of a bool.

Checklist:

  • I have performed a self-review of my own code
  • I have commented my code, particularly in hard-to-understand areas
  • I have added or updated relevant unit/integration/functional/e2e tests
  • I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
  • I have made corresponding changes to the documentation if needed
  • If I added or changed GroveDB structure, I described it in the area's structure.rs, regenerated grovedb-structure.json, and checked the structure viewer link posted on this pull request

For repository code-owners and collaborators only

  • I have assigned this pull request to a milestone

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Summary by CodeRabbit

  • New Features

    • Added elected moderation for contracts, including configurable election windows, challenge cooldowns, moderation abilities, document types, fee limits, interim moderators, and owner protection.
    • Added support for elected moderation configurations in platform and TypeScript interfaces.
  • Bug Fixes

    • Moderated document types are now blocked during the interim when no moderators are available.
    • Improved handling of permitted transitions when some document types are blocked.
  • Validation

    • Elected moderation settings are validated against contract schemas and remain fixed after creation.
    • Added clearer consensus reporting for unavailable moderated document types.

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📝 Walkthrough

Walkthrough

Changes

The pull request adds ContractModerators::Elected with frozen election parameters, interim moderation, ability envelopes, fee limits, and owner protection. It validates and serializes the declaration, enforces interim blocking, adds error code 41200, updates protocol limits, bindings, tests, and documentation.

Elected moderation

Layer / File(s) Summary
Elected declaration model
packages/rs-dpp/src/data_contract/config/moderation/*
Adds elected moderation types, interim modes, fee maximums, validation, and wire serialization.
Validation and update freezing
packages/rs-dpp/src/data_contract/config/methods/validate_update/v2/mod.rs, packages/rs-drive-abci/.../data_contract_*, packages/rs-dpp/src/data_contract/serialized_version/mod.rs
Validates declarations against document schemas and rejects elected-mode changes after creation.
Consensus errors and protocol limits
packages/rs-dpp/src/errors/..., packages/rs-platform-version/src/version/*
Adds ContractModeratedDocumentTypeNotYetUsableError with code 41200 and elected moderation timing limits.
Interim moderation gate
packages/rs-drive-abci/.../contract_moderation_gate/*, packages/rs-drive-abci/.../contract_user_moderation/state/v0/mod.rs
Blocks moderated document types without interim moderators, preserves unblocked transitions, and checks protected identities.
End-to-end coverage and bindings
packages/rs-drive-abci/.../contract_user_moderation/tests.rs, packages/wasm-dpp/src/errors/consensus/consensus_error.rs, packages/wasm-dpp2/src/data_contract/model.rs
Tests all interim modes and declaration refusal paths. WASM and TypeScript surfaces expose the new types and error.
Documentation updates
book/src/data-model/contract-moderation.md, book/src/error-handling/error-codes.md, packages/rs-platform-version/src/version/v14.rs
Documents elected moderation, interim behavior, frozen updates, and error range 41200-41299.

Priority: ➖ Normal

Estimated code review effort: 5 (Critical) | ~90 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant ContractCreator
  participant ContractValidation
  participant ContractModerationConfig
  participant BatchTransition
  participant ContractModerationGate
  ContractCreator->>ContractValidation: declare elected moderation
  ContractValidation->>ContractModerationConfig: validate schemas and timing bounds
  ContractModerationConfig-->>ContractValidation: accept or reject declaration
  BatchTransition->>ContractModerationGate: submit document transitions
  ContractModerationGate->>ContractModerationConfig: check interim moderators and blocked types
  ContractModerationGate-->>BatchTransition: pass unblocked transitions or return error 41200
Loading

Suggested reviewers: shumkov

Merge Risk: 🟡 Moderate · up to deb00

Fix the invalid creation test before merging; also align the elected-moderation documentation with the implemented type, error ranges, and electorate.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 71.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 100 functions across 24 files. (2 skipped… Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Linked Issues check ✅ Passed The PR implements Issue #4877 coding requirements. ContractModerators::Elected(Box<ElectedModerators>) contains bounded u32 join and vote windows with one-week defaults, challenge cool-down bounds…
Out of Scope Changes check ✅ Passed The changes stay within Issue #4877. They add the elected declaration, validation, immutable-update rules, interim moderation gate, state error, limits, serialization, bindings, tests, and related doc…
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly summarizes the main change: adding an elected moderation team declaration with immutable election parameters and interim behavior.
Full details: Docstring Coverage

Explanation

Docstring coverage is 71.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 100 functions across 24 files. (2 skipped: 2 unsupported.)

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@github-actions github-actions Bot added this to the v4.2.0 milestone Sep 21, 2026
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PR Hygiene: the checklist is in the description.

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QuantumExplorer and others added 2 commits September 21, 2026 19:59
…tion parameters and interim mode

A data contract may declare, when it is created, that its moderators are a
team elected by masternodes: a third ContractModerators kind, Elected, with
frozen election parameters (join and vote windows, challenge cool-down,
bounded by four new SystemLimits), the moderated document types, the charter
envelope (abilities and per-type per-action moderators fee maximums), the
interim moderators until a team is seated, and whether the owner is protected.

validate_moderation_config v0 checks the declaration against the contract's
document schemas; validate_config_update 2 refuses every change to it and
entering or leaving elected moderation; the batch transformer's
contract_moderation_gate v0 refuses every transition of a moderated type
while nobody moderates (ContractModeratedDocumentTypeNotYetUsableError,
41200). Interim moderators moderate and claim the pot as the merged kinds do.
No election exists yet.

Closes #4877. Part of #4865.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
…e the PR opened

- the gate test's `by_type` closure could not tie the map's key lifetime to the
  transitions, so the test binary did not build: it is a fn with a lifetime now
- three elected.rs assertions matched the Debug rendering of the errors, which
  escapes the quotes around document type names: they render with Display now
- the "window under a day" cases lowered the one-week default by a second, which
  is still within bounds: they are one second under the minimum now
- the "wider moderated set" case named a type the contract lacked, so the
  declaration's own validation refused before the frozen-config check under
  test: the update adds the type it names now
- a type alias for the freeze test's case table (clippy type_complexity)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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To view locally: download the artifact, unzip, and open index.html.

Updated at 2026-09-21T17:55:25.049Z

…Moderators

A contract's config is embedded by value wherever a contract is, and the
document create action carries an owned contract through its vote poll info.
The declaration grew that action past clippy's large_enum_variant threshold on
BatchedTransitionAction, which CI treats as an error. The wire format is
unchanged.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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Actionable comments posted: 4


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
In `@book/src/data-model/contract-moderation.md`:
- Line 31: Update the documented ContractModerators enum variant from
Elected(ElectedModerators) to Elected(Box&lt;ElectedModerators&gt;) so it
matches the boxed Rust representation, while leaving the JSON shape unchanged.

In `@book/src/error-handling/error-codes.md`:
- Around line 121-122: Remove the duplicate Contract Moderation row from the
error-code table, preserving the existing complete 41100-41118 range and its
41117/41118 assignments. Keep the separate 41200-41299 Contract Moderation Teams
row unchanged.

In
`@packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/contract_user_moderation/tests.rs`:
- Line 3251: Update the accepted-minimum test around Setup::new and
setup.contract so the contract used by the declaration remains uncommitted
before process runs. Use a fresh platform or a setup path that avoids committing
the initial contract, while preserving the existing success assertion.

In `@packages/rs-platform-version/src/version/v14.rs`:
- Line 468: Update the protocol documentation comment near
ContractModerators::Elected to state that the elector set includes both
masternodes and evonodes, matching the contract-moderation documentation.

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Reviewing files that changed from the base of the PR and between 49ca692 and deb0035.

📒 Files selected for processing (26)
  • book/src/data-model/contract-moderation.md
  • book/src/error-handling/error-codes.md
  • packages/rs-dpp/src/data_contract/config/methods/validate_update/v2/mod.rs
  • packages/rs-dpp/src/data_contract/config/moderation/elected.rs
  • packages/rs-dpp/src/data_contract/config/moderation/mod.rs
  • packages/rs-dpp/src/data_contract/serialized_version/mod.rs
  • packages/rs-dpp/src/errors/consensus/codes.rs
  • packages/rs-dpp/src/errors/consensus/state/contract_moderation/contract_moderated_document_type_not_yet_usable_error.rs
  • packages/rs-dpp/src/errors/consensus/state/contract_moderation/mod.rs
  • packages/rs-dpp/src/errors/consensus/state/state_error.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/transformer/v0/contract_moderation_gate/mod.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/transformer/v0/contract_moderation_gate/v0/mod.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/transformer/v0/mod.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/contract_user_moderation/state/v0/mod.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/contract_user_moderation/tests.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/data_contract_create/basic_structure/v2/mod.rs
  • packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/data_contract_update/basic_structure/v2/mod.rs
  • packages/rs-platform-version/src/version/mocks/v2_test.rs
  • packages/rs-platform-version/src/version/system_limits/mod.rs
  • packages/rs-platform-version/src/version/system_limits/v1.rs
  • packages/rs-platform-version/src/version/system_limits/v2.rs
  • packages/rs-platform-version/src/version/system_limits/v3.rs
  • packages/rs-platform-version/src/version/system_limits/v4.rs
  • packages/rs-platform-version/src/version/v14.rs
  • packages/wasm-dpp/src/errors/consensus/consensus_error.rs
  • packages/wasm-dpp2/src/data_contract/model.rs

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Comment thread book/src/data-model/contract-moderation.md Outdated
Comment thread book/src/error-handling/error-codes.md Outdated
Comment thread packages/rs-platform-version/src/version/v14.rs Outdated
QuantumExplorer and others added 2 commits September 21, 2026 21:47
…ration interim

Per Sam: the abilities a charter may claim are declared on each moderated
document type, not once for the contract. `moderated_document_types` is now
`BTreeMap<DocumentName, BTreeSet<ModerationAbility>>` (on the wire
`"moderatedDocumentTypes": {"post": ["ban", "deleteDocuments"]}`, the
`abilities` key is gone and refused); each set is non-empty, and
`deleteDocuments` needs that type flagged `canBeDeletedByModerators`, not any
type. The lists stay contract-wide.

Also per Sam: a fourth interim, `InterimModerators::NoModeration`
(`{"$type": "noModeration"}`): nobody moderates and nobody claims the pot
until a team is seated, as under `notYetUsable`, but the moderated types are
used unmoderated meanwhile instead of being blocked.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Document restore (#4885) took StateError discriminants 137-140 and codes
41119-41122: the elected team error moves to discriminant 141 (41200 kept),
the changelog entry becomes 22, and the elector set names masternodes and
evonodes as the book does. The book's enum snippet shows the boxed variant.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
QuantumExplorer and others added 3 commits September 22, 2026 00:31
…ities and fee maximums

Per Sam: `moderated_document_types` is `BTreeMap<DocumentName, ModeratedDocumentType>`
where the entry holds the non-empty `abilities` and an optional
`moderators_action_fee_maximums`; the separate top-level fee map is gone (and
refused as an unknown key). A charter can therefore only ever charge on a
type the team moderates. Wire:
`"moderatedDocumentTypes": {"post": {"abilities": ["ban"], "moderatorsActionFeeMaximums": {"create": 1000}}}`.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
…ed moderation snippet

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
…ration

Per Sam: a type's own `actionFees.moderators` amount is already the most a
team may charge, and a charter charges a share of it (the charter contract's
business), so the declaration carries no fee maximums. `moderated_document_types`
is `BTreeMap<DocumentName, BTreeSet<ModerationAbility>>` again
(`"moderatedDocumentTypes": {"post": ["ban"]}`); `ModeratorsActionFeeMaximums`
and the per-type entry are gone, and a `moderatorsActionFeeMaximums` key is
refused as unknown. The signer's fee agreement names the declared amounts and a
charter can only lower what is charged, so no agreement can mismatch a seated
charter.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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Data contract: elected moderation team declaration with frozen election parameters and interim mode (moderation teams B1)

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