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WFN QUICK BRIEF · UNDER 1 MIN
The short version
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What the primary record establishes
ERC-7201 specifies namespaced storage. Each module groups fields in a struct and derives a storage root from a namespace identifier. The formula is designed to separate those roots from each other and from the normal Solidity storage tree. Ethereum ERC-7201 ↗
What the distinction changes
Suppose a fee module and a limit module accidentally write to the same slot. Changing a fee can also change a limit. Distinct namespaces address that kind of collision when the implementation computes and uses the correct roots.
What to check before drawing a conclusion
The NatSpec annotation describes the intended storage location. The compiler does not enforce the pattern. During an upgrade, check the real slot calculations, unique namespaces and the layout within each struct. Reordering existing fields can change how previously written values are read.
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Original WFN vector illustrationWFN · 6 November 2026
Editorial noteSource-based explanation with original WFN analysis. Historical records retain their dates; numerical examples are illustrative. The original vector illustration is conceptual and is not documentary evidence.
WFN REALITY LEDGER
What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodEthereum ERC-7201
The linked source supports the documented record; WFN interpretation and illustrative examples are separate.
01 · VERIFIED RECORD
What the primary record establishes
ERC-7201 specifies namespaced storage. Each module groups fields in a struct and derives a storage root from a namespace identifier. The formula is designed to separate those roots from each other and from the normal Solidity storage tree. Ethereum ERC-7201 ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
Suppose a fee module and a limit module accidentally write to the same slot. Changing a fee can also change a limit. Distinct namespaces address that kind of collision when the implementation computes and uses the correct roots.
03 · REVIEW POINTS
What to check before drawing a conclusion
The NatSpec annotation describes the intended storage location. The compiler does not enforce the pattern. During an upgrade, check the real slot calculations, unique namespaces and the layout within each struct. Reordering existing fields can change how previously written values are read.
