| ”Insufficient prepaid fee balance” | Prepaid fee reserve is below the fee for the requested operation (every relay op is charged, not just transfers) | Call depositFees(wallet, accountId, amount) to top up; check with getFeeToken()/getAnonymousInlineTransferFee() |
| Fairycloak HTTP error | Relay unreachable or request rejected | Check the relay URL, API key, and account authorization |
| ”Account finalization timeout” | Account creation is still processing | Wait a few minutes and retry |
| ”Insufficient balance” | Transfer amount exceeds available balance | Deposit more tokens or reduce the amount |
| ”Amount too small” | Amount rounds to 0 in contract scale | Use a larger amount (minimum depends on token decimals) |
