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medium SHARE_COUNT_MISREAD_RISK

VTI: reading balanceOf() as shares understates by 0.1748% (multiplier 1.001751012x)

read from VTI (0x0594134DF3f171a354D9C85eBD65b7A6148F6D09) · methodology assay-rh-v0.4.0 · detected 2026-10-08T03:57:36.000Z
from the sweep at block 83015737, 11m ago

Who carries the exposure

Any integrator that presents VTI balanceOf() as a share count. The contract itself is behaving as ERC-8056 specifies and is not at fault.
The contract named above is what was READ. Naming it is not an accusation against it: a Stock Token that moves uiMultiplier() is doing what ERC-8056 specifies.

VTI reports uiMultiplier() = 1001751012345030813 (1.001751012), which is CORRECT AND SPEC-COMPLIANT behaviour under ERC-8056 — this finding is not a defect in the token contract. It records the exposure carried by a caller that reads balanceOf() as shares. Under ERC-8056 a corporate action moves the multiplier rather than balances, so balanceOf() returns tokens and share-equivalents = balance * uiMultiplier() / 1e18. A surface presenting the raw balance as a share count understates it by 0.1748% (the true count is 1.0018x the raw balance). Token value computed as balance * Chainlink feed price is unaffected, because the feed is already multiplier-adjusted.

Impact

0.1748% · how far a raw balanceOf() read as shares understates the true share count, as a share of the true count
totalSupply raw 127.1423 tokens vs 127.3649 share-equivalents (delta 0.2226). Presenting the raw balance as a share count understates by 0.1748%; equivalently the true count is 1.0018x the raw.

Evidence — 2/2 citations re-fetched and byte-compared

mismatched 0 · pruned 0 · verified 2026-10-08T03:57:38.400Z
uiMultiplier() == 1001751012345030813
chain 4663 · block 83016378 · uiMultiplier()
0x0594134DF3f171a354D9C85eBD65b7A6148F6D09
0x0000000000000000000000000000000000000000000000000de6ef3cfc36a89d
totalSupply() == 127142302260000000000
chain 4663 · block 83016378 · totalSupply()
0x0594134DF3f171a354D9C85eBD65b7A6148F6D09
0x000000000000000000000000000000000000000000000006e4743246d4a50800

Right of reply

No reply has been received for this finding. Anyone named here can have a response published verbatim and unedited alongside it. A finding shown to be wrong is corrected by changing the rule that produced it, with the notice recorded in the repository. Open a right-of-reply issue or see docs/RIGHT-OF-REPLY.md. Pre-publication notice is deliberately not claimed: the sweep publishes on a timer and for most findings the subject is a contract, not a person to notify.
VTI: reading balanceOf() as shares understates by 0.1748% (multiplier 1.001751012x) · ASSAY