ERC-777/1155/721 hook without reentrancy guard

StakeWise v3's assessment for RD-F-015 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

OsToken is ERC-20 + ERC-2612 (no ERC-777 callback). OsTokenFlashLoans uses flash-loan standard callbacks, not ERC-777 tokensReceived. No ERC-777/1155/721 integration without guard reported across audits.

Sources #

Etherscan
OsToken Etherscan verified sourceOsToken contract source at 0xf1C9acDc66974dFB6dEcB12aA385b9cD01190E38 — ERC20 + ERC20Permit, no ERC-777 interfaceretrieved 2026-05-16

Methodology #

Determine whether the protocol integrates token standards with callbacks (ERC-777 tokensReceived, ERC-1155 onReceived, ERC-721 onReceived) without reentrancy guards on the affected functions.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol stakewise factor RD-F-015 score green collected_at 2026-05-16 01:03:28