On July 2021, Chainswap was exploited in a business logic flaw, resulting in approximately $4 in losses. That makes the Chainswap exploit the 466th largest DeFi incident out of 690 documented in our archive.
Attack Mechanics: How the Chainswap Business Logic Flaw Played Out
Exploit Class Applied to Chainswap
The Chainswap incident on July 10, 2021 is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share. In the full archive, Chainswap is 1 of 144 documented business logic flaw incidents.
Chainswap in Context
At $4, the Chainswap exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — – EulerFinance (2023) at $200M.
Prior Business Logic Flaw Before Chainswap
The nearest business logic flaw incident before Chainswap was Chainswap, 8 days earlier on July 2, 2021. The same exploit class surfaced again within the business logic flaw attack surface.
Chainswap Vulnerability Signature
The primary source categorises the Chainswap exploit specifically as “Bridge, logic flaw”. This narrower label is entity-specific: it reflects how the Chainswap contract failed, rather than the broad business logic flaw pattern alone.
Impact & Recovery for Chainswap
Chainswap Loss Figure
The Chainswap exploit caused $4 in losses — a minor (<$1M) incident and the 17th largest of 37 documented in 2021.
Where Chainswap Sits Among Business Logic Flaw Attacks
Ranked by loss size, Chainswap is the 99th largest of 144 business logic flaw incidents documented. That puts the Chainswap loss below the class average of $6.08M.
Timeline Since the Chainswap Incident
The Chainswap exploit occurred 4.8 years ago (1,739 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for Chainswap
Public post-mortem / on-chain analysis for the Chainswap incident: view source.
FAQ
How much did Chainswap lose?
The Chainswap exploit in July 2021 resulted in $4 in losses — the 17th largest of 37 DeFi incidents that year.
When did the Chainswap hack happen?
The Chainswap exploit was recorded on July 10, 2021 — 1,739 days ago.
What type of exploit hit Chainswap?
The Chainswap incident is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share.
How common is the Business Logic Flaw pattern seen at Chainswap?
Our archive contains 144 documented business logic flaw incidents. The Chainswap incident is one of them.
How does Chainswap compare to the largest Business Logic Flaw attack?
The largest business logic flaw incident in our archive is – EulerFinance (2023) at $200M. The Chainswap loss is $4.
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