medium SHARE_COUNT_MISREPORT

TSM: balanceOf() is 1.001463024x away from share-equivalents

subject TSM (0x58FfE4a942d3885bAa22D7520691F611EF09e7AA) · methodology assay-rh-v0.2.0 · detected 2026-09-21T20:49:51.000Z

TSM reports uiMultiplier() = 1001463024159690554 (1.001463024). Under ERC-8056 a corporate action moves this multiplier rather than balances, so balanceOf() returns tokens, not share-equivalents. Share-equivalents = balance * uiMultiplier() / 1e18. Any surface presenting balanceOf() as a share count understates it by 0.1461% (the true count is 1.0015x the raw balance). Token value computed as balance * Chainlink feed price is unaffected, because the feed is already multiplier-adjusted.

Impact

14.63 bps · 0.1461%

totalSupply raw 3407.8944 tokens vs 3412.8803 share-equivalents (delta 4.9858). Presenting the raw balance as a share count understates by 0.1461%; equivalently the true count is 1.0015x the raw.

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

mismatched 0 · pruned 0 · verified 2026-09-21T20:49:58.405Z

uiMultiplier() == 1001463024159690554

chain 4663 · block 69097044 · uiMultiplier()
0x58FfE4a942d3885bAa22D7520691F611EF09e7AA

0x0000000000000000000000000000000000000000000000000de5e95082ba0f3a

totalSupply() == 3407894428120000000000

chain 4663 · block 69097044 · totalSupply()
0x58FfE4a942d3885bAa22D7520691F611EF09e7AA

0x0000000000000000000000000000000000000000000000b8be0926939d947000

Reproduce this yourself:

cast call 0x58FfE4a942d3885bAa22D7520691F611EF09e7AA "uiMultiplier()" \
  --block 69097044 \
  --rpc-url https://rpc.mainnet.chain.robinhood.com

Note: the public RPC prunes state within roughly 1k–10k blocks, so an older block may no longer be served. That makes a citation unchecked here, not disproven — ASSAY reports those two cases separately and never publishes a finding whose citation contradicts chain state.