token-integration-safety

Safe ERC-20 token integration requires using SafeERC20 patterns to handle non-standard return values and tokens like USDT and USDC. This mitigates risks across deposits, withdrawals, and approvals by enforcing robust interactions for arbitrary tokens.

USDT approval fails because it lacks a return value, breaking standard interfaces. You fix it by using SafeERC20 with forceApprove, which safely handles non-standard return values and mitigates token quirks during the approval process.

Integrating fee-on-transfer and rebasing tokens into a vault requires decimals awareness and balance checks after transfers. Using SafeERC20 patterns handles these ERC-20 quirks, ensuring accurate accounting for deposits and withdrawals.

Permit2 enables gasless approvals for non-standard tokens, but requires awareness of token quirks like blocklists and pause functionality. Safe ERC-20 integration patterns ensure Permit2 interactions remain secure across arbitrary tokens.

You must account for token blacklists and pause features whenever handling arbitrary tokens like USDC. Safe ERC-20 integration requires awareness of these quirks to prevent unexpected transaction failures during deposits and withdrawals.