feat(sdk)!: derive nonce-committed document ids in the JavaScript document create path - #4868
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…pt create path From protocol version 14 the id of a new document commits to the identity contract nonce of its create transition (#4859). Rust clients got the derivation through DocumentCreateTransitionV0::from_document; the wasm surface still copied the entropy-only v0 id the Document constructor produced into the transition, so every create built by hand in JavaScript was refused with InvalidDocumentTransitionIdError. DocumentCreateTransition now derives the id from the document's entropy and identityContractNonce through Document::generate_document_id for the platform version given (latest by default) and writes it back onto the caller's Document. Document.generateId takes the nonce and the platform version, requiring the nonce from version 14; Document gains setIdForCreation and an identityContractNonce constructor option; a Document built without either is documented as carrying a placeholder. wasm-dpp2 stops carrying its own copy of the v0 hash. wasm-sdk documentCreate mirrors the confirmed id onto the wasm object instead of through Reflect. Reading a wasm object out of an options bag now refuses one JS has already freed instead of dereferencing a null pointer. BREAKING CHANGE: Document.generateId(type, owner, contract, entropy) without an identityContractNonce throws at protocol version 14; new DocumentCreateTransition({document}) replaces the id the document carried and mutates that document. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change adds protocol-version-aware document ID derivation to ChangesDocument ID derivation
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant JavaScript
participant DocumentCreateTransition
participant Document
participant Network
JavaScript->>DocumentCreateTransition: Build transition with identityContractNonce
DocumentCreateTransition->>Document: Derive and set creation ID
DocumentCreateTransition-->>JavaScript: Return signed transition
JavaScript->>Network: Broadcast transition
Network-->>JavaScript: Confirm document ID
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Inline comments:
In `@book/src/data-model/documents.md`:
- Line 104: Clarify the preceding ID guidance to scope the “do not read the ID
from the document” rule to the Rust/SDK creation path. In the JavaScript
guidance around DocumentCreateTransition, explicitly state that wasm-dpp2
updates both the transition and document.id, so callers must use the final ID
written back to the document rather than an entropy-only placeholder.
In `@packages/wasm-dpp2/src/data_contract/document/model.rs`:
- Around line 284-286: Update the doc_id match in the document construction flow
so any present identity_contract_nonce takes precedence and derives the ID via
Document::generate_document_id. Keep explicit id handling only when
identity_contract_nonce is absent, while preserving the existing no-ID fallback
through Document::generate_document_id_v0.
In `@packages/wasm-dpp2/src/utils.rs`:
- Around line 241-277: Update DocumentCreateTransitionWasm::constructor to
extract prefundedVotingBalance, tokenPaymentInfo, and actionFeeAgreement via
try_from_options_optional before calling try_from_options_mut for the
DocumentWasm. Keep the mutable document borrow limited to set_id_for_creation
and the subsequent pure-Rust transition generation.
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book/src/data-model/documents.mdbook/src/sdk/put-operations.mdpackages/js-evo-sdk/README.mdpackages/rs-platform-version/src/version/v14.rspackages/wasm-dpp2/README.mdpackages/wasm-dpp2/src/data_contract/document/model.rspackages/wasm-dpp2/src/state_transitions/batch/document_transitions/create.rspackages/wasm-dpp2/src/utils.rspackages/wasm-dpp2/tests/unit/Document.spec.tspackages/wasm-dpp2/tests/unit/DocumentsTransitions.spec.tspackages/wasm-sdk/src/state_transitions/document.rs
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PastaPastaPasta
changed the title
…n reads its options before borrowing the document Review fixes for #4868. - `new Document({ id, identityContractNonce })` derived nothing from the nonce when an explicit id was given, so a caller could reference that id from another document in the batch while the create transition carried the derived one. The nonce now fixes the id; an explicit id alongside it must equal the derived one or the constructor throws. - `DocumentCreateTransition`'s constructor now reads every other option before taking the mutable borrow of the document, so a JS getter on the options bag re-entering the same `Document` can no longer trip wasm-bindgen's recursive-borrow runtime error. - The book scopes "read the id from the transition" to the Rust path and says wasm-dpp2 writes the final id back onto `document`. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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The two red drive-abci tests in the Rust workspace job ( |
3 participants
Issue being fixed or feature implemented
Follow-up to #4859. From protocol version 14 the id of a new document commits to the identity contract nonce of its create transition. #4859 taught rs-dpp, rs-sdk and everything built on them (
DocumentCreateTransitionV0::from_documentreplaces the placeholder id), and listed the JavaScript side as a follow-up:So on the wasm surface the
Documentconstructor andDocument.generateIdstill produced the entropy-only v0 id andnew DocumentCreateTransition({ document, identityContractNonce })copied it verbatim into the base, even though it had the nonce in its hand. Every create a JavaScript app builds itself — rather than throughsdk.documents.create(), which goes through rs-sdk — was refused withInvalidDocumentTransitionIdError.The only way out for such an app was to reimplement the consensus hash in TypeScript. Yappr did exactly that (PastaPastaPasta/yappr#562) because it assembles and signs its own transitions to cache the signed bytes. Duplicating a consensus derivation in an app is precisely what these bindings exist to prevent, and every future protocol version would have to be mirrored there by hand.
What was done?
wasm-dpp2
DocumentCreateTransitionderives the id itself, throughDocument::generate_document_idfor the platform version given (latest by default), from the document's entropy and theidentityContractNonceit already takes — the same thingDocumentCreateTransitionV0::from_documentdoes in dpp. It writes the result back onto the caller'sDocument, so after constructiondocument.idequalstransition.base.id. Whatever id the document carried is replaced: the transition can only carry the id consensus recomputes.Document.generateId(documentTypeName, ownerId, dataContractId, entropy?, identityContractNonce?, platformVersion?)gains the nonce and the version. The nonce is required from protocol version 14 (with an error that says why) and ignored before it.DocumentgainssetIdForCreation(identityContractNonce, platformVersion?)and anidentityContractNonceconstructor option (the nonce fixes the id: an explicitidgiven alongside it must equal the derived one, or the constructor throws), for a caller that needs the final id before the transition exists — a document another document in the same batch references. ADocumentbuilt without either is documented, in the TypeScript option docs and the README, as carrying a placeholder.utils::generate_document_id_v0); everything routes through rs-dpp's versioned dispatcher, so there is one derivation in the repository.__wbg_ptr == 0) instead of dereferencing a null pointer. That hazard predates this PR ingeneric_of_js_val, but the new mirror below runs after anawait, where a caller disposing its document mid-flight is reachable.wasm-sdk
documentCreatemirrors the confirmed id onto the wasm object through the same mutable borrow instead of aReflect::setof a string, so theDocumentthe caller holds is really updated rather than gaining a stray own-property that shadows the getter.Docs
The v14 changelog entry of #4859 now names every create path that derives correctly; the book's document-id and put-operations sections, the wasm-dpp2 README (new "Document ids" section) and the js-evo-sdk README say that no app needs to reimplement the hash.
How Has This Been Tested?
Locally on this branch (macOS):
yarn workspace @dashevo/wasm-dpp2 run test:unit(mocha + karma against a freshly built wasm): 1281 passing, 7 pending. New specs:new Document({ id, identityContractNonce })accepts an explicit id equal to the derived one and rejects one that differs;generateIdreproduces rs-dpp's pinned vectore574ae73…(with and without an explicit latest version), derives a different id per nonce, keeps the entropy in the id, requires the nonce at version 14, ignores it at 13;setIdForCreationgives the document its final id and throws for a document without entropy;DocumentCreateTransitionderives the id and mirrors it onto the document, derives a different id for another nonce, keeps the entropy-only id before version 14, and refuses a document without entropy.cargo test -p wasm-dpp2 --lib: 8 passed, including three new host tests pinning that the wasm wrapper feeds its own contract id, type name and entropy into the same derivation (the samee574ae73…vector), that it falls back to the entropy-only id at version 13, and that it refuses a document with no entropy.cargo clippy -p wasm-dpp2 -p wasm-sdk --all-targets -- -D warningsclean;cargo fmt --all --checkclean.Building the wasm needs a clang that can target
wasm32-unknown-unknown; the macOS system clang cannot, so this used Homebrew LLVM viaCC_wasm32_unknown_unknown.Not run locally: the rest of the workspace, and any end-to-end test against a live network.
Breaking Changes
For JavaScript consumers of
@dashevo/wasm-dpp2/@dashevo/evo-sdk:Document.generateId(type, owner, contract, entropy)without anidentityContractNoncethrows at protocol version 14. It used to return the entropy-only id, which consensus no longer accepts, so the call could only ever produce a rejected create.new DocumentCreateTransition({ document, ... })replaces the id the document carried and mutates that document. An app that set an id explicitly and expected the transition to carry it gets the derived one instead — again, the only id consensus accepts.No Rust API changes. No consensus change: this brings the bindings in line with the rules protocol version 14 already enforces.
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