Incident All ledgers
Spartan: $30.5m
Spartan lost $30.5m on 2 May 2021. Ranked 100th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 2 May 2021
- Lost
- $30.5m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Token & Share Accounting
- Method
- Incorrect Share Accounting
- Chains
- BSC
On May 1, 2021, Spartan Protocol on BSC lost about $30.5M in what the record calls the chain's first flashloan attack. An attacker used a 100k WBNB flashloan to inflate a pool's balance, exploiting a check on current rather than cached balance to withdraw an unfair share.
Against the ledger
- It ranks 100th of the 1,272 incidents with a known loss, and 22nd in 2021.
- It accounts for 10.6% of the $287.1m in known losses in May 2021.
- 160 incidents in the ledger are classified as Token & Share Accounting, for $1.45bn in total. This one is 2.1% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 22 Nov 2023 | KyberSwap Elastic | $48.0m | DeFi Protocol | Rounding Error | — |
| 05 Mar 2021 | Paid Network | $27.0m | DeFi Protocol | Infinite Mint | — |
| 08 Jan 2026 | Truebit | $26.4m | DeFi Protocol | Arithmetic Error | — |
| 20 May 2024 | Gala | $22.3m | DeFi Protocol | Infinite Mint | — |
| 15 May 2024 | Sonne Finance | $20.0m | DeFi Protocol | Donation Attack | — |
All failures in 2021 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Spartan, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/spartan-2021-05-02/. How this is built