EIP-1898 uses a block hash to keep related Ethereum state reads consistent
A balance and a contract call can describe different states if a reorganisation happens between requests. An explicit block hash identifies the intended state.
The underlying reporting problem is coherence. Two requests for “latest” need not describe the same block. A wallet can otherwise combine a sender balance from one state with a recipient balance from another.
What to check before drawing a conclusion
WFN would record the hash, requested canonicality and node responses with the resulting display. An unavailable historical state and a noncanonical block should remain distinguishable errors, rather than being replaced silently with current data.
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Original WFN vector illustrationWFN · 23 October 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.
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What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodEIP-1898, created 1 April 2019; Final status checked 23 October 2026
The linked source supports the documented record; WFN interpretation and illustrative examples are separate.
A balance and a contract call can describe different states if a reorganisation happens between requests. An explicit block hash identifies the intended state.
With blockHash, requireCanonical defaults to false. When set to true, it asks the node to reject a block outside its canonical chain; the specification distinguishes that case from a block the node cannot find. Ethereum EIPs — EIP-1898: blockHash in defaultBlock methods, Final ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
The underlying reporting problem is coherence. Two requests for “latest” need not describe the same block. A wallet can otherwise combine a sender balance from one state with a recipient balance from another.
Pinning related reads to one hash identifies a common state even when a height alone could refer to a different block after a reorganisation. That improves the meaning of a snapshot without promising that the block will remain canonical forever.
03 · REVIEW POINTS
What to check before drawing a conclusion
WFN would record the hash, requested canonicality and node responses with the resulting display. An unavailable historical state and a noncanonical block should remain distinguishable errors, rather than being replaced silently with current data.
Check the particular provider’s support and available state history. A Final interface specification is not evidence that every endpoint implements every option or retains all old states. Consistency, availability and finality are separate questions.
