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WFN QUICK BRIEF · UNDER 1 MIN
The short version
MODE 2 OF 2
What the format changes
The usual representation stores r, s and recovery parity separately. ERC-2098 defines r and yParityAndS as two 32-byte words. Canonical low-s signatures leave the most significant bit of s unused, so the compact representation can carry parity there. ERC-2098 · Compact signature representation ↗
Decoding and checking
A verifier reads that highest bit as parity and masks it off to recover s. After decoding, normal signature verification still uses the original message hash and the expected signer. A shorter encoding does not supply a domain or chain identifier. The surrounding signing protocol defines those fields.
Integration tests
Check whether every wallet, ABI and verification library accepts the compact form. Test round trips for both parity values and reject invalid lengths and noncanonical signatures according to your verifier. Keep the message, digest and signature format with any audit record.
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01 · VERIFIED RECORD
What the format changes
The usual representation stores r, s and recovery parity separately. ERC-2098 defines r and yParityAndS as two 32-byte words. Canonical low-s signatures leave the most significant bit of s unused, so the compact representation can carry parity there. ERC-2098 · Compact signature representation ↗
02 · WFN EDITORIAL ANALYSIS
Decoding and checking
A verifier reads that highest bit as parity and masks it off to recover s. After decoding, normal signature verification still uses the original message hash and the expected signer. A shorter encoding does not supply a domain or chain identifier. The surrounding signing protocol defines those fields.
03 · REVIEW POINTS
Integration tests
Check whether every wallet, ABI and verification library accepts the compact form. Test round trips for both parity values and reject invalid lengths and noncanonical signatures according to your verifier. Keep the message, digest and signature format with any audit record.
Original WFN vector illustrationWFN · 9 November 2026
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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 periodERC-2098 · Compact signature representation
