- Add CHAIN138_ALIGNMENT_AUDIT_2026-04-18.md: drift report covering 67 unique
Chain-138 addresses from 7 canonical sources, cross-checked against on-chain
state at https://rpc-core.d-bis.org (chainId 0x8a / 138).
- Add docs/data/chain138-alignment.json: structured findings for downstream tooling.
- Banner CHAIN138_TOKEN_ADDRESSES.md as DEPRECATED (only 5 of 15+ tokens, 0 of 43
infrastructure contracts).
Findings highlights:
- 64 of 67 referenced addresses are live on-chain; 3 ghosts (in allowlist only).
- 61 deployed contracts are missing from CHAIN138_TOKEN_ADDRESSES.md.
- WETH9 genesis slot (0xC02aaA39...Cc2) is a non-ERC20 shim (decimals=0); real
WETH9 is at 0x3304b747...E6 per smom/docs/ADDRESS_MAPPING.md.
- WETH10 at canonical 0xf4BB2e28...A9F works (18 decimals, 'Wrapped Ether v10').
- 15 compliant fiat/metal tokens (cEURC, cGBPC, cAUDC, cJPYC, cCHFC, cCADC,
cXAUC, cXAUT, cEURT, cGBPT, plus non-compliant-wrapper USDT/USDC) all live on-chain,
all absent from CHAIN138_TOKEN_ADDRESSES.md.
Recommended follow-ups listed in the audit doc.
