feat: add tx kernel support for `NoteAttachment`#2249

Merged

PhilippGackstatter merged 17 commits intonextfrom

pgackst-note-attachment-kernel-support

Jan 15, 2026

Commits on Jan 15, 2026

feat: Implement `NoteAttachment`
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chore: Precompute `NoteHeader` in `PartialNote`
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feat: Remove aux, exec hint from `NoteMetadata`; add attachment
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feat: refactor output note memory layout and metadata building
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chore: adapt tx event extraction to new output_note::create stack state
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chore: prepare `compute_output_notes_commitment` for attachment hashing
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chore: Update input notes commitment to include attachment
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chore: include attachment in output notes commitment
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chore: return attachment and header from `input_note_get_metadata`
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chore: return attachment and header from `output_note_get_metadata`
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fix: compilation errors in `miden-testing`
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chore: regenerate kernel procedure hashes
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chore: add changelog
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chore: rename attachment_types to attachment_type_info for clarity
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chore: Move content to word encoding to method
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chore: rename `Raw` -> `Word` and `Commitment` -> `Array`
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chore: Rename `NoteAttachmentCommitment` to `*Array`
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