feat(js): add exact u32 conversion - #71
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wemeetagain
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🤖 I have created a release *beep* *boop* --- ## [4.0.0](zapi-v3.1.0...zapi-v4.0.0) (2026-08-18) ### ⚠ BREAKING CHANGES * isolate DSL class tags across addons ([#67](#67)) * manage external buffer lifetime ([#66](#66)) * require writable external buffer storage ([#58](#58)) ### Features * add owned typed arrays ([#68](#68)) ([b92c2de](b92c2de)) * **js:** add exact u32 conversion ([#71](#71)) ([d6b21e1](d6b21e1)) * **js:** add typed array toArray ([#70](#70)) ([ab42ab0](ab42ab0)) * **js:** export module/namespace consts and enums ([#73](#73)) ([76dc0db](76dc0db)) ### Bug Fixes * **dsl:** support class pointer arguments ([#50](#50)) ([9dd2111](9dd2111)) * harden N-API boundary against JS-triggerable memory bugs ([#60](#60)) ([fff76f3](fff76f3)) * isolate DSL class tags across addons ([#67](#67)) ([3ab8c11](3ab8c11)) * manage external buffer lifetime ([#66](#66)) ([d134a6a](d134a6a)) * **napi:** receive raw pointer out parameters ([#57](#57)) ([fde4a9a](fde4a9a)) * remove redundant platform check from musl detection ([#64](#64)) ([0d4829c](0d4829c)) * require writable external buffer storage ([#58](#58)) ([8fd898f](8fd898f)) * restore registerDecls on Zig 0.16 ([#59](#59)) ([7f3af3e](7f3af3e)) ### Code Refactoring * **js:** unify env lifecycle refcounting ([#53](#53)) ([d3d5056](d3d5056)) ### Miscellaneous Chores * define changelog sections for release-please ([#54](#54)) ([1c5e7b4](1c5e7b4)) * update dev deps ([#74](#74)) ([5121590](5121590)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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In a few places in the new pubkey cache in lodestar-z/bls, we use
toU32()but that does not guarantee that the converted number is indeed a validu32. We add this as an alternative totoU32()for additional safety