feat(vault): accept an operator's carrier serial

[LKSNDRTMLKV]

Closes #435

Core carries carrierSerial: the serial an operator attributes to a passport, printed in AI 21 of its GS1 carrier. Nothing here could set it, so every carrier printed the default derived from the passport id, and an operator that already serialises its units could not make the label match the serial the unit carries. This gives it a writer.

What changes

• carrierSerial on POST /dpp, and a carrierSerial column in every import template. Omitted or blank, nothing changes: the carrier prints the default.
• The value. One to twenty characters of GS1's CSET 82 set, 422 otherwise. 422 too on a passport with no GTIN, since only a GTIN has a GS1 carrier and an attribution that can never be printed would be a field that exists and does nothing.
• Create-time only. Core keeps it out of reach of a patch, the carrier is stamped at publish, and an amendment already carries it forward. A PUT or an amendment that names a different serial is a 422 naming /carrierSerial. Other create-time keys are ignored there, but this one is what the label prints, so ignoring it would answer 200 to a caller whose label will not change. The same value is accepted, so a body read back and sent again still applies.
• Unique under its GTIN. A label that names two passports resolves to neither, so a serial another passport already holds is a 409 naming /carrierSerial. The passport named in supersedesId is the exception, and so is any superseded record behind it, because one label names a whole amendment chain. POST /dpp/validate runs the same check, so a preview cannot pass what create refuses.
• A successor takes the label when its predecessor is superseded. A successor declared with supersedesId is published before the separate supersede call, so for that stretch both records are current under one label. resolve_label now treats a record whose declared predecessor is also current as not yet in charge, and answers the predecessor until the supersede. Before this, the label was a 500 for as long as the supersede had not happened. The same holds for the step inside amend between publishing the successor and superseding the original.
• In an import, a malformed serial is a row error naming the row, the same arrangement the commodity code has. So is a serial repeated within one file under one GTIN, which names the row that stated it first, because the importer sends rows concurrently and both could pass the vault's check. A 409 from the vault is a row error naming the column, not an unexpected status. A re-imported row that states a serial its matched passport does not print (attributed, or the default its id derives) is not reported unchanged: a draft's update is refused, and a published passport's row is a conflict. The column goes last in each committed template and in the generated battery templates; a file without it still imports.

Worth a look

• 409, not 422. Nothing is wrong with the serial itself. The record it would create conflicts with one that exists. POST /dpp already documented a 409 for an in-flight idempotent request, so its description now covers both and the problem document tells them apart.
• A check, not a constraint, so publish checks again, under a lock. Two creates that arrive together can both pass create's check. A unique index would also refuse amendments, which share the serial by design, so it stays a check, and publish repeats it where the label goes live: a live passport outside this one's chain that prints the serial makes the publish a 422 naming /carrierSerial. Drafts do not count, since a draft answers no label, so of two drafts that raced past create, the first to publish keeps the serial and the other stays a draft. Without this, both could publish, and the pair could not be repaired because supersedesId is fixed at create. The check and the write are separate steps, so publish holds the label (GTIN plus printed serial) from the check until its write. Two publishes of one label therefore cannot both check before either writes. The lock is in-process, which covers the node as it runs (one process per operator), and needs no wider core port and no migration. Striped, so it never grows, and released straight after the write. The importer also refuses an in-file repeat before sending anything, which is the likeliest way to reach that race.
• The predecessor answers until it is superseded, not the successor. The state machine still holds the predecessor live until then, and amend supersedes last on purpose so that a refused publish leaves the original in charge. Records that each declare the other stay an error rather than resolving to nothing.
• serialNumber is untouched. An operator may state the same value for both, and nothing copies one into the other. serialNumber is still not accepted on create.
• The wording of a serial refusal lives once, in dpp-types, because core's own is private and the importer and the create route would otherwise each carry a copy.

Tests

• The request rules: accepted, each refusal names the rule, and a serial on a DID- or link-identified passport or one with no product data is refused. The same body without the serial is shown to be valid, so what is refused is the serial.
• The uniqueness rule against the in-memory store: held, free under another GTIN, a draft holds it, the replaced passport and a superseded chain do not hold it against a successor, and a serial another passport prints by default is taken.
• Label resolution: a published successor takes the label only once its predecessor is superseded, and records that declare each other are still refused. At publish: the second of two drafts sharing a serial cannot go live, and a chain does not hold its serial against itself.
• apply_patch: a different serial is refused, and the printed one passes whether it was attributed or derived.
• End to end against Postgres: stored, printed in the carrier and resolved by; refused by create and by the dry run; an amendment and a declared successor share it without being refused; a published declared successor leaves the label on the predecessor until the supersede and moves it after; a PUT with a different serial is a 422 naming the field, and with the same one a 200; of two drafts that raced past create, only the first published goes live and the label reaches it; and two drafts published at the same moment, with a signer slow enough to hold the gap between check and write open, give exactly one 200 and one 422.
• The importer: a row-level test; one driven from the templates that reaches every importer, so one that forgot to read the column fails by name; a repeated serial in one file; the vault client's 409; and the matcher's comparison of a stated serial.

Each was seen to fail first. Dropping either half of the uniqueness exclusion fails its own test, and making one importer ignore the cell fails the template-driven test naming that importer. Without the pending-successor filter the end-to-end test gets the 500; without its guard, records that declare each other resolve to nothing; without the in-file check, all three rows reach the vault; without the publish recheck, the raced draft publishes with a 200; without the label lock, the two simultaneous publishes are both a 200.

Docs

The request schema, the 409 on both routes, the 422 for a different serial on PUT and in the amend body, the 422 at publish, both regenerated bundles, a contract-fixture value, and the unreleased changelog.

Rebased onto main after #433 and #444. The pending-successor filter sits inside current_for, before it counts the current records.

Summary by CodeRabbit

• New Features
  • Passports can include an optional carrier serial at creation, which appears in the carrier URL. Serials must follow GS1 character and length rules, be associated with a GTIN, and be unique for that GTIN, except within an amendment chain.
  • Import templates include a carrier serial column. Older files without the column remain supported.
• Bug Fixes
  • Updates and amendments cannot change an issued serial. Invalid or duplicate serials are reported with field-specific errors, and publishing is blocked when a conflicting serial is found.

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📝 Walkthrough

Walkthrough

The change adds optional carrierSerial input to passport creation and imports. The vault validates and stores the value, checks uniqueness within a GTIN, and rejects changes after creation. Amendments retain the predecessor’s serial, and API documentation describes the request and conflict responses.

Changes

Carrier serial lifecycle

Layer / File(s)	Summary
Request contract and serial validation api/components/schemas/passport-requests/*, api/paths/vault/*, crates/dpp-types/src/*, crates/dpp-node/tests/*, CHANGELOG.md	The create request type and schema add optional carrierSerial with GS1 validation rules. API schemas document create conflicts and the rules for updates and amendments.
Vault creation and serial conflicts crates/dpp-vault/src/handlers/{create,validate}.rs, crates/dpp-vault/src/domain/service/query.rs, crates/dpp-vault/tests/carrier_serial.rs	Create validation checks serial format and GTIN eligibility. The vault stores supplied serials and checks for active serial holders under the same GTIN, except for the passport being superseded. Create and validation requests report conflicts.
Amendments, updates, and label resolution crates/dpp-vault/src/domain/service/{create,query,publish,label_lock}.rs, crates/dpp-vault/tests/{carrier_serial.rs,helpers/mod.rs}, api/paths/vault/*_publish.yaml	Updates accept the existing effective serial and reject a different value. Amendments retain the predecessor’s serial. Label resolution keeps the predecessor as the result until it is superseded. Publication checks for serial conflicts among published passports under the same GTIN.
Import parsing and conflict reporting crates/dpp-integrator/src/domain/*, crates/dpp-integrator/src/handlers/import.rs, crates/dpp-integrator/src/infra/vault_client.rs	Templates and row validators support the optional carrierSerial column. Import parsing trims and validates values, rejects repeated GTIN-and-serial pairs, and reports vault conflicts as row errors.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature · Severity of issue fixed: Medium

Sequence Diagram(s)

sequenceDiagram
  participant Operator
  participant create_handler
  participant PassportService
  participant VaultStore
  Operator->>create_handler: Submit create request
  create_handler->>create_handler: Validate serial and GTIN
  create_handler->>PassportService: Check serial under GTIN
  PassportService->>VaultStore: Look up serial holders
  VaultStore-->>PassportService: Return matching holders
  PassportService-->>create_handler: Return conflict status
  create_handler-->>Operator: Return conflict or create result

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Merge Risk: 🔵 Low · up to 9a92f

Re-importing a published passport can report a false conflict when its file explicitly states the passport’s default printed serial. Omitting that optional value is a workaround; correct the comparison before relying on this import case.

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Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Publication Boundary	❓ Inconclusive	The reviewed diff contains no ADR reference, non-public repository/path, pricing or contract term, vendor lead time, negotiation status, or identifiable real company/individual in a non-public arrange…	Provide the complete pull request description, or confirm that the omitted portion contains none of the prohibited references. Re-run the publication-boundary check.

✅ Passed checks (6 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	[ #435 ] The PR adds carrierSerial to create requests and import processing. It validates GS1 CSET 82 values and GTIN eligibility, and identifies /carrierSerial on refusal. It stores the value for…
Out of Scope Changes check	✅ Passed	The API, import, publication, label-resolution, validation, test, and documentation changes support [ #435 ]. They implement or verify attributed carrier serials, conflict handling, amendment behavior…
Docstring Coverage	✅ Passed	Docstring coverage is 83.84% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 99 functions across 29 files. (7 skipped: 7…
New Dependency Is Justified	✅ Passed	No Cargo.toml file changes appear in the reviewed pull-request range. The pull request adds no new direct Cargo dependency, so this check passes trivially.
Title check	✅ Passed	The title clearly and concisely identifies the main change: accepting an operator-supplied carrier serial in the vault.
Description check	✅ Passed	The description provides a detailed summary, links issue #435, lists the implementation changes, documents behavior and error cases, and describes the test coverage. It uses different headings from th…

Full details: Publication Boundary

Explanation

The reviewed diff contains no ADR reference, non-public repository/path, pricing or contract term, vendor lead time, negotiation status, or identifiable real company/individual in a non-public arrangement. The changed template names are existing sample fixtures, and the added references are to public GS1 and EU Regulation 2023/1542 material. However, the pull request description is explicitly truncated, and its omitted portion could contain a prohibited reference. The full description is not available in the checkout or Git refs.

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Review comments at @crates/dpp-vault/src/handlers/create.rs:
- Around line 205-246: Make the carrier-serial ownership check and draft
insertion atomic by running both under the same transaction-scoped lock for the
GTIN and serial. Update the create flow that calls carrier_serial_conflict so
concurrent creates cannot both pass the check before inserting; preserve the
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📒 Files selected for processing (31)

• CHANGELOG.md
• api/components/schemas/passport-requests/AmendRequest.yaml
• api/components/schemas/passport-requests/CreatePassportRequest.yaml
• api/paths/vault/vault_api_v1_dpp.yaml
• api/paths/vault/vault_api_v1_dpp_validate.yaml
• api/paths/vault/vault_api_v1_dpp_{dppId}.yaml
• crates/dpp-integrator/src/domain/batch_runner.rs
• crates/dpp-integrator/src/domain/battery_template.rs
• crates/dpp-integrator/src/domain/fields.rs
• crates/dpp-integrator/src/domain/matcher.rs
• crates/dpp-integrator/src/domain/validate/aluminium.rs
• crates/dpp-integrator/src/domain/validate/battery.rs
• crates/dpp-integrator/src/domain/validate/construction.rs
• crates/dpp-integrator/src/domain/validate/furniture.rs
• crates/dpp-integrator/src/domain/validate/mattress.rs
• crates/dpp-integrator/src/domain/validate/mod.rs
• crates/dpp-integrator/src/domain/validate/steel.rs
• crates/dpp-integrator/src/domain/validate/textile.rs
• crates/dpp-integrator/src/domain/validate/toy.rs
• crates/dpp-integrator/src/domain/validate/tyre.rs
• crates/dpp-integrator/src/handlers/import.rs
• crates/dpp-integrator/src/infra/vault_client.rs
• crates/dpp-node/tests/create_passport_request_is_one_type.rs
• crates/dpp-node/tests/openapi_contract.rs
• crates/dpp-types/src/lib.rs
• crates/dpp-types/src/passport_request.rs
• crates/dpp-vault/src/domain/service/create.rs
• crates/dpp-vault/src/domain/service/query.rs
• crates/dpp-vault/src/handlers/create.rs
• crates/dpp-vault/src/handlers/validate.rs
• crates/dpp-vault/tests/carrier_serial.rs

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Inline comments:
Review comments at @crates/dpp-vault/src/domain/service/query.rs:
- Around line 330-355: Make the carrier-serial check atomic with the publish
write: in the publish flow using carrier_serial_is_live_elsewhere, acquire a
transaction-scoped advisory lock keyed by GTIN and effective serial before
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📒 Files selected for processing (5)

• CHANGELOG.md
• api/paths/vault/vault_api_v1_dpp_{dppId}_publish.yaml
• crates/dpp-vault/src/domain/service/publish.rs
• crates/dpp-vault/src/domain/service/query.rs
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @crates/dpp-integrator/src/domain/matcher.rs:
- Around line 142-150: Update the matcher’s serial comparison in
states_another_carrier_serial to use the passport’s effective printed serial,
including the vault-derived default when no serial is stored. Expose that
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carrierSerial so the raw field remains unchanged, and return Unchanged when the
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• api/openapi.bundled.yaml is excluded by !api/openapi.bundled.yaml
• crates/dpp-integrator/templates/aluminium-v1.csv is excluded by !**/*.csv
• crates/dpp-integrator/templates/construction-v1.csv is excluded by !**/*.csv
• crates/dpp-integrator/templates/furniture-v1.csv is excluded by !**/*.csv
• crates/dpp-integrator/templates/mattress-v1.csv is excluded by !**/*.csv
• crates/dpp-integrator/templates/steel-v1.csv is excluded by !**/*.csv
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📒 Files selected for processing (36)

• CHANGELOG.md
• api/components/schemas/passport-requests/AmendRequest.yaml
• api/components/schemas/passport-requests/CreatePassportRequest.yaml
• api/paths/vault/vault_api_v1_dpp.yaml
• api/paths/vault/vault_api_v1_dpp_validate.yaml
• api/paths/vault/vault_api_v1_dpp_{dppId}.yaml
• api/paths/vault/vault_api_v1_dpp_{dppId}_publish.yaml
• crates/dpp-integrator/src/domain/batch_runner.rs
• crates/dpp-integrator/src/domain/battery_template.rs
• crates/dpp-integrator/src/domain/fields.rs
• crates/dpp-integrator/src/domain/matcher.rs
• crates/dpp-integrator/src/domain/validate/aluminium.rs
• crates/dpp-integrator/src/domain/validate/battery.rs
• crates/dpp-integrator/src/domain/validate/construction.rs
• crates/dpp-integrator/src/domain/validate/furniture.rs
• crates/dpp-integrator/src/domain/validate/mattress.rs
• crates/dpp-integrator/src/domain/validate/mod.rs
• crates/dpp-integrator/src/domain/validate/steel.rs
• crates/dpp-integrator/src/domain/validate/textile.rs
• crates/dpp-integrator/src/domain/validate/toy.rs
• crates/dpp-integrator/src/domain/validate/tyre.rs
• crates/dpp-integrator/src/handlers/import.rs
• crates/dpp-integrator/src/infra/vault_client.rs
• crates/dpp-node/tests/create_passport_request_is_one_type.rs
• crates/dpp-node/tests/openapi_contract.rs
• crates/dpp-types/src/lib.rs
• crates/dpp-types/src/passport_request.rs
• crates/dpp-vault/src/domain/service/create.rs
• crates/dpp-vault/src/domain/service/label_lock.rs
• crates/dpp-vault/src/domain/service/mod.rs
• crates/dpp-vault/src/domain/service/publish.rs
• crates/dpp-vault/src/domain/service/query.rs
• crates/dpp-vault/src/handlers/create.rs
• crates/dpp-vault/src/handlers/validate.rs
• crates/dpp-vault/tests/carrier_serial.rs
• crates/dpp-vault/tests/helpers/mod.rs

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