fix: enable large commits - #202
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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 a preallocation instruction for commit-state PDAs, undelegate buffers, and delegated accounts. It adds argument types, instruction builders, chunked growth, validation, PDA creation, exact-size checks, and resizing. Commit and undelegation flows now accept preallocated PDAs. Fast-path dispatch supports the new discriminator. Integration tests cover allocation, growth, authority checks, in-flight commits, sizing, finalization, and realloc failures. Suggested reviewers: ✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 5
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Inline comments:
In `@dlp-api/src/instruction_builder/preallocate_buffer.rs`:
- Line 30: Update preallocate_buffer to handle the Result from to_vec without
unwrap or expect, returning the serialization error to its caller. Propagate
that error through preallocate_buffer_chunks and any necessary callers while
preserving successful buffer construction.
In `@tests/test_commit_finalize_from_buffer.rs`:
- Around line 255-266: Extract the repeated InvalidRealloc matches! assertion
into a shared assert_invalid_realloc helper under tests/fixtures, then replace
both occurrences in this file and the corresponding occurrence in
test_finalize.rs with that helper, preserving the existing error shape and
failure message.
Apply the same fix in `@tests/test_preallocate_buffer.rs` around lines 37 - 49:
Second duplicated assert_custom_error helper covered by the same shared fixture
helper.
In `@tests/test_commit_state_from_buffer.rs`:
- Around line 226-231: Update the preallocate_buffer call in the wrong-size test
to use a below-cap target of 5,000 instead of target_size as u32 minus 1, so the
test exercises an exact-size mismatch without MAX_PERMITTED_DATA_INCREASE
truncation.
In `@tests/test_preallocate_buffer.rs`:
- Around line 329-333: Remove the unnecessary
#[allow(clippy::too_many_arguments)] attribute from setup_program_test_env,
delete the discarded program_config_from_program_id call near the related
comment, and remove that import since it becomes unused.
- Around line 306-327: Update test_preallocate_rejects_unregistered_validator to
create and fund the unregistered account before submitting the transaction, so
failure is attributable to the missing validator_fees_vault PDA. Rename the
_validator binding to validator and update its uses, then assert that processing
returns the specific expected processor error rather than only checking that any
error occurred.
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📒 Files selected for processing (17)
dlp-api/src/args/mod.rsdlp-api/src/args/preallocate_buffer.rsdlp-api/src/discriminator.rsdlp-api/src/error.rsdlp-api/src/instruction_builder/mod.rsdlp-api/src/instruction_builder/preallocate_buffer.rssrc/lib.rssrc/processor/fast/commit_state.rssrc/processor/fast/mod.rssrc/processor/fast/preallocate_buffer.rssrc/processor/fast/undelegate.rssrc/processor/fast/undelegate_confined_account.rssrc/processor/fast/utils/pda.rstests/test_commit_finalize_from_buffer.rstests/test_commit_state_from_buffer.rstests/test_finalize.rstests/test_preallocate_buffer.rs
GabrielePicco
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GabrielePicco
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Directionally LGTM, but comments of few changes to address before merging
| .map_err(|_| ProgramError::BorshIoError)?; | ||
| let target_size = args.target_size as usize; | ||
| match args.kind { | ||
| PreallocateBufferKind::CommitState => { |
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This persists commit_state while leaving commit_record uninitialized. Normal undelegation rejects the initialized state, while undelegate_with_rollback_after_timeout.rs:193-206rejects exactly this half-initialized combination. A validator can preallocate, stop, and permanently block the owner’s escape path. Either prevent standalone persistence or explicitly close a verified preallocation-only state during rollback.
| system_program, | ||
| ) | ||
| } | ||
| PreallocateBufferKind::DelegatedAccount => resize_towards( |
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This directly zero-extends and rent-tops the live delegated account without recording its original shape. Existing timeout wrappers snapshot the current bytes and restore them after DLP returns, as demonstrated by the timeout wrapper test. Rollback therefore restores the padded, uncommitted representation; fixed-layout owner programs may reject it.
Require an atomic exact consumer or store sufficient rollback metadata.
| ctx: impl RequireUninitializedAccountCtx, | ||
| label: &str, | ||
| ) -> Result<u8, ProgramError> { | ||
| if state_size > MAX_PERMITTED_DATA_INCREASE { |
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This only recognizes initialized preallocations when the target exceeds 10,240 bytes. At or below the cap, it requires a System-owned uninitialized PDA, but preallocation has already made the canonical PDA DLP-owned. Both commit and undelegate consumers then fail.
Accept a canonical DLP-owned exact-size preallocation independently of target size while preserving the existing create path for legacy clients.
| system_program, | ||
| ) | ||
| } | ||
| PreallocateBufferKind::UndelegateBuffer => { |
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This can persist a canonical DLP-owned undelegate buffer, but the normal/request zero-data path and confined zero-data path return without closing it. The nine-account timeout path cannot receive it at all.
This strands rent and can obstruct later delegations using the same deterministic PDA. Add cleanup or cancellation while keeping legacy nine-account timeout calls valid.
3 participants
Problem
What problem are you trying to solve?
Currently commits of accounts with diff over 10kb aren't possible.
Solution
How did you solve the problem?
We introduce preallocate instruction that allows to preallocate target account for: Commit, CommitFinalize, Finalize, Undelegate.
Note: Undelegate isn't fully supported yet and is to be enabled in future. Current issue is
close_pdabefore calling in user callback. User has no ability to recreate account larger than 10kb as we did.Solution for this: zero out data for account instead of clearing it up. This is considered out of scope here
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AFTER:
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Other changes (e.g. bug fixes, small refactors)
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