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feat(platform)!: generatedFrom, string properties the platform generates with a system function (PV14) - #5099
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…ed form of another (PV14)
A string property may declare normalizedFrom: { property, transform } to
hold a normalized form of another string property of the same document.
The one transform, homographSafeASCII, lowercases A to Z and maps o to 0
and i and l to 1, keeping every other character; on ASCII it equals the
DPNS trigger's convert_to_homograph_safe_chars, without Unicode tables.
A document that leaves the property out while supplying the source gets it
computed on arrival (create, replace and index-only delete transformers,
and the document rebuilt for proof verification); a supplied value is
checked in DataContract::validate_document_properties after the schema and
refused with DocumentPropertyNotNormalizedError (10424). Registration
checks the source (another string property, not normalized itself, not
transient, inside every object that holds the property); changing the
declaration on update is incompatible. Every call site is inert before
protocol version 14.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. 📝 WalkthroughWalkthroughThis change adds the protocol-version-14 ChangesgeneratedFrom support
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant TransitionTransformer
participant DocumentTypeBasicMethods
participant DocumentAction
TransitionTransformer->>DocumentTypeBasicMethods: fill_generated_properties using transition data and platform version
DocumentTypeBasicMethods-->>TransitionTransformer: return data with generated values
TransitionTransformer->>DocumentAction: build action and derive index values from processed data
Suggested reviewers: Merge Risk: 🔵 Low · up to The generatedFrom feature is gated to protocol version 14. The remaining items are documentation corrections about path-length units, the client regeneration method, and case-folding scope. None affects runtime behavior, so the change is mergeable with a minor follow-up. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to Generated fields affect how documents are accepted, indexed, stored, and proven. The inspected paths use a shared, version-gated rule and did not reveal a security failure, but a mismatch in this design could affect document integrity or availability. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 71.26% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 261 functions across 57 files. (8 skipped: 8 unsupported.)
✨ Finishing Touches 💡 2📝 Generate docstrings 💡
⚔️ Resolve merge conflicts 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @book/src/contract-keywords/normalized-from.md:
- Line 3: Update the normalizedFrom description to limit case folding to ASCII,
and name only the `o/0`, `i/1`, and `l/1` look-alike mappings. Clarify that
non-ASCII characters are preserved, so the description does not imply that `É`
and `é` normalize to the same value.
Review comments at
@packages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/normalized_from_tests.rs:
- Line 572: Update the expected document type name in the assertion within the
test using parse_dispatched to "test_doc", matching the name assigned to the
parsed document type.
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book/src/SUMMARY.mdbook/src/contract-keywords.mdbook/src/contract-keywords/normalized-from.mdbook/src/contract-keywords/property-schemas.mdbook/src/contract-keywords/transient.mdbook/src/data-model/documents.mdbook/src/error-handling/error-codes.mdpackages/rs-dpp/schema/meta_schemas/document/v3/document-meta.jsonpackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/mod.rspackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/mod.rspackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/normalized_from_tests.rspackages/rs-dpp/src/data_contract/document_type/index/extract_contested_values/mod.rspackages/rs-dpp/src/data_contract/document_type/index/preallocation.rspackages/rs-dpp/src/data_contract/document_type/methods/mod.rspackages/rs-dpp/src/data_contract/document_type/methods/validate_update/common/mod.rspackages/rs-dpp/src/data_contract/document_type/mod.rspackages/rs-dpp/src/data_contract/document_type/property/mod.rspackages/rs-dpp/src/data_contract/document_type/property/normalized_from.rspackages/rs-dpp/src/data_contract/document_type/v0/random_document_type.rspackages/rs-dpp/src/data_contract/methods/validate_document/v0/mod.rspackages/rs-dpp/src/errors/consensus/basic/basic_error.rspackages/rs-dpp/src/errors/consensus/basic/document/document_property_not_normalized_error.rspackages/rs-dpp/src/errors/consensus/basic/document/mod.rspackages/rs-dpp/src/errors/consensus/codes.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_create_transition/v0/mod.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_replace_transition/v0/mod.rspackages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/tests/document/mod.rspackages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/tests/document/normalized_from.rspackages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/transformer/v0/mod.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_create_transition_action/v0/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_index_only_delete_transition_action/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_index_only_delete_transition_action/v0/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_replace_transition_action/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_replace_transition_action/v0/transformer.rspackages/rs-drive/src/verify/state_transition/verify_state_transition_was_executed_with_proof/v0/mod.rspackages/rs-json-schema-compatibility-validator/src/rules/rule_set.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/mod.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v1.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v2.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v3.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v4.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v5.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v6.rspackages/rs-platform-version/src/version/v14.rspackages/wasm-dpp/src/errors/consensus/consensus_error.rspackages/wasm-dpp2/src/consensus_error.rs
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…update rule, random documents - The create, replace and index-only delete from_document builders compute a left-out normalized property, so an SDK-built transition carries it and its contest is detected; Sdk::contest_fund_to_join resolves the contest on a filled copy. - The prover's index-only branch fills the values, as the verifier does. - validate_update v1 refuses a new property normalized from a source that already existed (DocumentTypeUpdateError): stored documents were never filled. - Random documents compute each normalized property from its source. - The declaring paths are cached on DocumentTypeV2 (normalized_from_fields) and the check compares without building the normalized string. - names_an_object is shared with distinctFrom, and the typed-array items lookup reuses typed_array_items_keyword. - Tests: replace proof, index-only create/delete with proofs, contested index over the normalized property, builders, random documents, update. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Every value a normalizedFrom property can hold is the normalized form of a source that passed the source's pattern, so the book examples and the drive-abci test contract drop the normalized properties' patterns and keep maxLength for their indexes. The wrong-value test now sends "bob", which the keyword itself refuses. Descriptions that said "the properties' pattern" now name the source's pattern. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ction and params
The keyword becomes generatedFrom: { "function": <name>, "params": [...] },
so it can take more built-ins later, and functions a contract brings once
those exist. Built-ins are named under sys.; the first is
sys.stringTransformations.homographSafeASCII, taking one string param.
- GeneratedFrom { function: GenerationFunction, params: Vec<GenerationParam> };
each function declares how many params it takes, checked at registration.
- Params are property paths for now (GenerationParam::Property); literals,
system values and nested calls can be added without changing what parses.
- Registration, generation and the check run per param; the update rule
refuses a new generated property only when all its params already existed.
- DocumentPropertyNotGeneratedError (10424) names the function and params;
wasm-dpp2 DocumentGeneratedFromErrorCode.
- Version slots, meta-schema, compatibility rule, book chapter
(contract-keywords/generated-from.md), deep dive and v14 item 52 renamed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ted keys, $ref, random documents - The client builders (create, replace and index-only delete from_document), the SDK contest fund lookup and the JS and FFI property-constraint pre-checks call the new regenerate_generated_properties: it replaces a value the document holds with the one its params generate, and removes it when a param is absent. A fetched, edited and replaced document no longer sends the stale value the platform refuses (a paid 10424). - The check refuses a document that repeats a key on the way to a param or to the generated property: the schema validation and storage keep the last of repeated keys, where the platform generated from the first. - Meta-schema v3 refuses generatedFrom beside $ref, which the parser would drop, and its update-rule wording now matches the code (one new param). - Random documents draw the params of a drawn generated property, so a required generated property with an optional param is never left out. - The prover and verifier fill moves into index_only_transition_entry_path_query, the builder both share. - generated_from_fields moves to DocumentTypeV2Getters beside distinct_from_fields and caches (path, declaration) pairs; the check compares against GenerationFunction::apply, dropping is_applied. - GenerationFunction gets its own module, with a string_transformations submodule per sys. namespace holding homograph_safe_ascii. - A PV13 test for the in-place replace transformer, the reason in every in-place comment, imports instead of inline paths, and the book's error codes per rule. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…-from-keyword # Conflicts: # packages/rs-sdk-ffi/src/data_contract/property_constraints.rs
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
Review comments at @book/src/contract-keywords/generated-from.md:
- Line 8: Update the parameter-path limit in the function-value documentation to
specify a maximum of 256 UTF-8 bytes, not characters, matching the parser’s
`path.len()` check.
Review comments at @packages/rs-platform-version/src/version/v14.rs:
- Around line 1373-1374: Update the documentation comment around the client
transition builders to name `regenerate_generated_properties` as their method,
separating this behavior from the preceding `fill_generated_properties` call
sites.
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book/src/SUMMARY.mdbook/src/contract-keywords.mdbook/src/contract-keywords/generated-from.mdbook/src/contract-keywords/property-schemas.mdbook/src/contract-keywords/transient.mdbook/src/data-model/documents.mdbook/src/error-handling/error-codes.mdpackages/rs-dpp/schema/meta_schemas/document/v3/document-meta.jsonpackages/rs-dpp/src/data_contract/document_type/accessors/mod.rspackages/rs-dpp/src/data_contract/document_type/accessors/v2/mod.rspackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/mod.rspackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/generated_from_tests.rspackages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/mod.rspackages/rs-dpp/src/data_contract/document_type/index/extract_contested_values/mod.rspackages/rs-dpp/src/data_contract/document_type/index/preallocation.rspackages/rs-dpp/src/data_contract/document_type/methods/mod.rspackages/rs-dpp/src/data_contract/document_type/methods/validate_update/common/mod.rspackages/rs-dpp/src/data_contract/document_type/methods/validate_update/v1/mod.rspackages/rs-dpp/src/data_contract/document_type/mod.rspackages/rs-dpp/src/data_contract/document_type/property/generated_from/generation_function/mod.rspackages/rs-dpp/src/data_contract/document_type/property/generated_from/generation_function/string_transformations.rspackages/rs-dpp/src/data_contract/document_type/property/generated_from/mod.rspackages/rs-dpp/src/data_contract/document_type/property/mod.rspackages/rs-dpp/src/data_contract/document_type/random_document.rspackages/rs-dpp/src/data_contract/document_type/v0/random_document_type.rspackages/rs-dpp/src/data_contract/document_type/v2/accessors.rspackages/rs-dpp/src/data_contract/document_type/v2/mod.rspackages/rs-dpp/src/data_contract/methods/validate_document/v0/mod.rspackages/rs-dpp/src/errors/consensus/basic/basic_error.rspackages/rs-dpp/src/errors/consensus/basic/document/document_property_not_generated_error.rspackages/rs-dpp/src/errors/consensus/basic/document/mod.rspackages/rs-dpp/src/errors/consensus/codes.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_create_transition/v0/from_document.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_create_transition/v0/mod.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_index_only_delete_transition/v0/from_document.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_replace_transition/v0/from_document.rspackages/rs-dpp/src/state_transition/state_transitions/document/batch_transition/batched_transition/document_replace_transition/v0/mod.rspackages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/tests/document/generated_from.rspackages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/batch/tests/document/mod.rspackages/rs-drive/src/query/index_only_synthesis.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_create_transition_action/v0/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_index_only_delete_transition_action/v0/transformer.rspackages/rs-drive/src/state_transition_action/batch/batched_transition/document_transition/document_replace_transition_action/v0/transformer.rspackages/rs-json-schema-compatibility-validator/src/rules/rule_set.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/mod.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v1.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v2.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v3.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v4.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v5.rspackages/rs-platform-version/src/version/dpp_versions/dpp_contract_versions/v6.rspackages/rs-platform-version/src/version/v14.rspackages/rs-sdk-ffi/src/data_contract/property_constraints.rspackages/rs-sdk/src/platform/documents/contest_fund.rspackages/wasm-dpp/src/errors/consensus/consensus_error.rspackages/wasm-dpp2/src/consensus_error.rspackages/wasm-dpp2/src/data_contract/document_type_property_constraints.rs
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- book/src/contract-keywords/property-schemas.md
- book/src/SUMMARY.md
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…ive more string transformations GenerationFunction becomes SystemFunction, an enum of namespaces, each an enum of its own in a module of its own. SystemFunction::StringTransformation holds sys.stringTransformations, which gains lowercase, uppercase, capitalize, camelCase and snakeCase beside homographSafeASCII. Every string transformation changes ASCII characters only (no Unicode tables, so nodes built with different Rust releases agree) and gives back its own output unchanged. camelCase and snakeCase split words at ASCII non-alphanumerics and before an ASCII capital that starts a word (helloWorld, XMLHttp). Meta-schema v3 lists all six, and a test pins that list to SystemFunction::ALL. The book lists each function with an example and warns that snakeCase can lengthen a value past the property's maxLength. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…-from-keyword # Conflicts: # packages/rs-platform-version/src/version/v14.rs
… test builds the replace action with its new field - v14 item 53 names regenerate_generated_properties for the client builders, the shared index-only proof builder, the $ref refusal and the repeated-key refusal. - The book states the param path limit holds ASCII, so characters and bytes agree. - The hand-built replace action in the generatedFrom structure test sets property_constraint_aggregates, added by #5109. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Reviewed |
This pull request now only makes propertyAgreement pairs compare values instead of index keys. The registration rule that a preallocated index's agreement source fits a tree key, and the Drive preallocation changes that go with it, move unchanged to #5123 with their tests and fixtures. The PV14 note is renumbered from 53, which #5099 took on v4.2-dev, to 56 (54 is claimed by an open pull request, 55 by #5123), and now covers only the comparison. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Basic explanation
What this does: A contract can now say "the platform fills in this text field from that one", for example "
normalizedLabelislabelin lowercase, witho,iandlswapped for0,1and1". The contract names a system function and the fields it reads. The system functions so far change a string's case (lowercase,uppercase,capitalize,camelCase,snakeCase) or fold it for homographs (homographSafeASCII). An app may leave the field out and the platform writes it in when the document arrives, or the app may send it and the platform checks it. It is the rule DPNS checks today in custom code for usernames, turned into a schema keyword any contract can use.Value: Any app can build a unique index where
Bob,BOBandB0Bcount as the same name, without platform code written for it. It is also the step before DPNS's own homograph checks can move out of its custom code (a later change). Apps no longer have to compute the value themselves. Function names are namespaced (sys.…for system functions), leaving room for functions contracts may bring later.Risks: Low for existing contracts: nothing changes unless a contract declares the keyword, and every changed path does nothing before protocol version 14. The new part of the design is that the platform writes a value into a document the client did not send. That had to reach every place that reads a document's data (contest detection, indexes, the stored document, and the proofs), so a missed place would show up as a proof mismatch or a missed collision. The tests cover each of those. An SDK built before this change reports a proof mismatch when an app leaves the field out on a contract that uses the keyword; nothing on chain is affected.
Issue being fixed or feature implemented
We are retiring data triggers where protocol version 14 schema keywords can replace them. The DPNS
domaincreate trigger cannot be retired yet: two of its checks,normalizedLabel == convert_to_homograph_safe_chars(label)and the same fornormalizedParentDomainName, have no keyword. This adds that keyword. Adopting it in DPNS is left for a later change (plan below).Design decisions (agreed with Sam):
v4.3-devhas no protocol version 15 yet.generatedFrom: { "function": <name>, "params": [...] }, a function and its arguments, so it can grow into other functions, and into functions contracts bring later. System functions are named undersys.;SystemFunctionis an enum of namespaces, each an enum of its own.sys.stringTransformations(StringTransformation) holdslowercase,uppercase,capitalize,camelCase,snakeCaseandhomographSafeASCII.str::to_lowercasedepends on the Unicode tables of the Rust release a node is built with, which on a general keyword could split consensus. Characters outside ASCII are kept. Which characters are allowed is each param'spattern's job, never the function's.patternof its own: every value it can hold is generated from params that passed their own patterns. It keepsmaxLengthwhen indexed (at most 63), as every indexed string does.DataContract::validate_document_properties, wheremaxBytesandpropertyConstraintsrun, so a client'sdocument.validatesees it too.What was done?
The keyword (meta-schema v3,
packages/rs-dpp/schema/meta_schemas/document/v3/document-meta.json):generatedFrom: { "function": "sys.stringTransformations.homographSafeASCII", "params": ["<dotted path>"] }on a string property. A dependent schema restricts it to strings; typed-arrayitemsrefuse it.Before and after:
A contract declaring:
JsonSchemaError, 10101){ "label": "Bob" }(normalizedLabelrequired)normalizedLabelis required{ "label": "Bob", "normalizedLabel": "b0b" }{ "label": "Bob", "normalizedLabel": "b0b" }{ "label": "Bob", "normalizedLabel": "bob" }DocumentPropertyNotGeneratedError(10424){ "label": "B0B" }afterBobexists, unique index onnormalizedLabelDuplicateUniqueIndexError(both generateb0b){ "normalizedParent": "dash" }withoutparentParse (
rs-dpp/src/data_contract/document_type/):property/generated_from/:GeneratedFrom { function, params }andGenerationParam::Property(path).system_function/holdsSystemFunction, an enum of namespaces (SystemFunction::StringTransformation(StringTransformation)), with one submodule persys.namespace.system_function/string_transformations.rsholdsStringTransformationand its six functions, each of one string:lowercase,uppercase,capitalize,camelCase,snakeCase(the last two split words at ASCII non-alphanumerics and before an ASCII capital that starts a word, as inhelloWorldandXMLHttp) andhomographSafeASCII. On any ASCII stringhomographSafeASCIIgives exactly whatconvert_to_homograph_safe_charsgives.DocumentProperty::generated_from(appended field, skipped whenNone).class_methods/try_from_schema/mod.rs:apply_generated_from(slotapply_generated_from,Nonebefore 14) reads the declaration on every parse and checks the function is a built-in andparamsholds as many params as it takes.validate_generated_from_declarations(parser generation 3) checks that every param is another string property, is not generated itself, and is neither transient nor inside a transient object (the same goes for the declaring property). It also checks that every param sits inside every object that holds the declaring property, so there is always an object to write into.Generation on arrival (
DocumentTypeBasicMethods::fill_generated_properties, slotfill_generated_properties): when a document leaves a declared property out and supplies every param, the value is generated and written in. It is called:platform_versionfor this;Document::try_from_create_transition/try_from_replace_transition(dpp), and inindex_only_transition_entry_path_query, the one builder the prover and the verifier share for index-only entries, soprove_state_transitionandverify_state_transition_was_executed_with_proofwork from the document the platform stored.DocumentTypeV2(DocumentTypeV2Getters::generated_from_fields, next todistinct_from_fields).Check (
DocumentTypeBasicMethods::validate_generated_from_properties, slotvalidate_generated_from):DataContract::validate_document_propertiesv0 runs it after the JSON schema andmaxBytes. A declared property must equal what its function generates from its params and be absent when a param is. A document that repeats a key in an object on the way to the property or to a param is refused too: the JSON schema validation and the stored document keep the last of repeated keys, while the path reads that generate the value find the first, so a repeated key could otherwise store a name beside a generated value made from a different one. Otherwise the new basic errorDocumentPropertyNotGeneratedError(10424; BasicError discriminant 200), naming the property, the function and its params, is returned.Registration: meta-schema v3 refuses
generatedFrombeside$ref, since the parser replaces a$ref'd property with its definition and would drop the declaration.Update compatibility:
generatedFromis registered inrs-json-schema-compatibility-validator/src/rules/rule_set.rsas fixed: adding, removing or changing it is refused (IncompatibleDocumentTypeSchemaError, 10246).validate_updatev1 refuses a property the update adds withgeneratedFromwhen all its params already existed (DocumentTypeUpdateError, 40212). Documents stored before the update were never generated, so they would hold the params without the value. A property with a new param is fine: old documents lack that param, so the value is rightly absent.Clients (
DocumentTypeBasicMethods::regenerate_generated_properties, same slot): the client-side twin sets every declared property to what its params generate, replacing a value the document holds and removing it when a param is absent. The create, replace and index-only deletefrom_documentbuilders call it, so a transition an SDK builds carries the value, a document fetched, edited and sent back carries the value of its new params rather than the stale one the platform would refuse, and its contest (DPNS-style contested index over the generated property) is detected before the fund is stated.Sdk::contest_fund_to_joinand the property-constraint pre-checks (JScheckDocumentPropertyConstraints, FFIdash_sdk_data_contract_check_property_constraints) judge the document the same way. Random documents draw the params of every generated property they drew, optional ones included, then generate the value, so fixtures pass the schema and the check.Bindings and docs:
DocumentGeneratedFromErrorCodeandConsensusError.documentGeneratedFromErrorCode;contract-keywords/generated-from.md, a deep dive indata-model/documents.md, the keyword overview rows and the error-code row.Numbering: #5041 (refersTo commit-and-reveal, open) also claims BasicError discriminant 200 and code 10423. This PR takes 10424 so no public code moves whichever merges first; the discriminant gets renumbered by whichever PR rebases second. Changelog item 52 went to #5101 when it merged, so this PR's item is 53.
In-place changes to shipped generations
Each edit below is unreachable before protocol version 14. There the meta-schemas (v0 to v2) refuse
generatedFrom, the parser ignores it (apply_generated_fromisNone, so no property carries a declaration), and both method slots areNone.fill_generated_propertiesthen leaves data untouched andvalidate_generated_from_propertiesreturns an empty result without reading anything.DataContract::validate_document_propertiesv0validate_generated_fromisNoneDocumentCreateTransitionActionV0::try_from_borrowed_document_create_transition_with_contract_lookup)fill_generated_propertiesisNone; the data clone moved earlier, a pure refactorDocumentReplaceTransitionActionV0::try_from_borrowed_document_replace_transition)platform_versionparameter and abase.document_type()?call ahead of the existing logic; that call cannot fail, because building the base action above it already resolved the document type (its token cost is read from it), and thedocument_type_field_is_requiredcalls right after resolve it the same waybase.document_type()?call cannot fail for the same reason (the base action read the deletion token cost from the type)insert_values,insert_values_nested)apply_generated_fromreturnsNonewithout reading the schema when its slot isNoneDocument::try_from_create_transition_v0/try_from_replace_transition_v0, the create / replace / index-only deletefrom_documentbuilders, random documents, the JS and FFI property-constraint pre-checksindex_only_transition_entry_path_query(shared by proof generation and verification)DocumentType::validate_updatev1names_an_object(shared by thedistinctFromandgeneratedFromdeclaration checks)distinctFromcheck with identical outputMeta-schema v3 is edited in place under its own rule: it stays editable until 4.2 is live on mainnet.
Adopting it in DPNS (follow-up, not in this PR)
DPNS v2 shipped at protocol version 13, so adoption needs:
A DPNS v3 schema that adds
generatedFromtonormalizedLabel(paramlabel) and tonormalizedParentDomainName(paramparentDomainName). The two generated properties drop theirpattern(implied by the params' patterns), andnormalizedParentDomainNamedrops its"minLength": 0(a string may already be empty, and the parser reads an absent minimum as 0).maxLengthstays on both for the index:Neither removal changes a stored encoding (
patternandminLengthonly affect validation), and neither admits a document the keyword would not refuse. The same version should setcanBeDeleted: falseondomain, so both changes ship in one schema version. It is applied withapply_contractat the upgrade, which skipsvalidate_update, so every stored property encoding must stay identical. In particularparentDomainNamestays optional, sincerequiredchanges the stored encoding.A DPNS create trigger version without the two homograph checks, bound from that protocol version.
A user update could not add the keyword to existing properties (the differ freezes it, and
validate_updaterefuses a new generated property over existing params). The system contract upgrade skips both checks. That is safe for DPNS, because every stored domain already holds the right values, which the trigger enforced.What adoption changes for DPNS:
DataTriggerConditionError(40500), which listed every failed check.parentDomainNameis refused with 10424, because the normalized parent is required and its param is absent. Today it fails inside the trigger.Follow-ups
drive::query::filter) match clauses against a transition's raw data, so a subscription on a generated property misses creates and replaces that left it out (after this merges). The same PR can give the create, replace and index-only delete transitions one method that returns their data as the node reads it, and use it in the transformers, the dpptry_from_*functions, the proof builder and the filter.refersTo,maxBytes,distinctFrom,encryptedFor,requiredSince) is still dropped silently when written beside$ref, and still reads nested values through the first of repeated keys; this PR closes both only forgeneratedFrom.documentTypeDistinctFrom, and a JS helper to generate the values before local validation.sys.built-ins stay recomputed.How Has This Been Tested?
rs-dpp/.../property/generated_from/system_function/string_transformations.rs:homographSafeASCIIequalsconvert_to_homograph_safe_charson all 128 ASCII characters and on every string of up to three characters over the DPNS alphabets; the case changes, the word splitting and camelCase and snakeCase on examples (XMLHttpRequest,version2Beta, separators, non-ASCII); every transformation keeps non-ASCII characters, is idempotent, and keeps the length (camelCase never lengthens, snakeCase at most doubles).system_function/mod.rs:SystemFunctiongenerates nothing for another number of params, reads and writes its wire names, and lists exactly the functions meta-schema v3 lists;generated_from/mod.rs: the declaration's wire form.generated_from_tests.rs: every string transformation registers and generates.rs-dpp/.../try_from_schema/v3/generated_from_tests.rs:validate_document_propertiesordering after the JSON schema;generatedFrombeside$refis refused by the meta-schema;rs-dpp/.../validate_update/common/mod.rs: adding, changing or removing the declaration is incompatible; an unchanged one is not.validate_update/v1: a new generated property over an existing param is refused, one over a new param is not.rs-drive-abci/.../batch/tests/document/generated_from.rs:rs-sdk-ffi/.../property_constraints.rs: the pre-check judges a left-out or stale generated property as the builders send it.rs-json-schema-compatibility-validatorrule examples, the frozen BasicError discriminant test, and the wasm-dpp2 error-code mirror test.Run locally:
cargo test -p dpp --features all_features_without_client --lib: 4989 passedcargo test -p drive-abci --lib generated_from: 13 passed;cargo test -p drive --lib index_only: 72 passed;cargo test -p rs-sdk-ffi --lib property_constraints: 12 passedcargo test -p json-schema-compatibility-validatorcargo test -p drive --lib -- verify::state_transition prove state_transition_action: 1475 passedcargo check -p drive --no-default-features --features verifycargo test -p drive-abci --lib state_transitions::batch: 759 passed, all batch tests, since the transformers changed for every protocol versioncargo test -p wasm-dpp2 --lib generated_fromcargo clippy --all-targets -- -D warningson dpp, drive, drive-abci, dash-sdk, rs-sdk-ffi, json-schema-compatibility-validator and wasm-dpp2;cargo check -p wasm-dpp --target wasm32-unknown-unknownNot run locally: the JS specs, the Swift and Kotlin SDKs, and the full drive and drive-abci suites (CI).
Breaking Changes
Consensus change at protocol version 14 (new schema keyword, new basic error 10424, new version slots). Rust API:
DocumentPropertygains a publicgenerated_fromfield, so struct literals needgenerated_from: None;DocumentTypeBasicMethodsgains a requiredgenerated_from_fields;platform_version.Nothing changes for existing contracts or documents.
Checklist:
structure.rs, regeneratedgrovedb-structure.json, and checked the structure viewer link posted on this pull requestFor repository code-owners and collaborators only
🤖 Generated with Claude Code
PR Hygiene ·
3dc2c22/skip-botsproceeds without the ones not yet reported/self-reviewedonce the bots are donedpp— you own itrs-drive-abci— you own itrs-drive— you own itrust-sdk-ffi(packages/rs-sdk-ffi/src/data_contract/property_constraints.rs) — lklimek or shumkovrust-sdk(packages/rs-sdk/src/platform/documents/contest_fund.rs) — lklimek or shumkovWhen every box is checked the
PR Hygienecheck passes and this can merge.Summary by CodeRabbit
generatedFromcontract keyword, allowing eligible string properties to be generated from other document properties using a built-in transformation.