How much was lost in the TamagochiSwap hack?

The TamagochiSwap hack resulted in — in losses on August 30, 2021.

What attack technique was used in the TamagochiSwap exploit?

The TamagochiSwap exploit utilized Rugpull. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

TamagochiSwap Hack

TOTAL LOST —

Aug 30, 2021 Rugpull polygon

Affected Chain polygon Incident surface

Recovered - No recovery reported

Same Technique 865 Total incidents

Protocol Type Dexs Target category

Incident Overview

MochiSwap is a Decentralized DEX exchange and supports users around the world offering decentralized asset swapping and liquidity pools, security is high concern and the DAO is under control with a "Gnosis Safe” multisignature wallet. MochiSwap currently supports Harmony ONE, Binance Smart Chain along with Incentivized liquidity pools for yield mining.

Incident Report

Protocol / Project TamagochiSwap

Date of Incident August 30, 2021

Affected Chain(s) polygon

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs

Affected Token TAMA

Official Website tamagotchiswap.com/

Protocol Twitter/X @mochiswap

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of rugpull and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with polygon smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in TamagochiSwap's contract logic - root cause: token

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Hard to catch — private key / OpSec failures are outside smart contract audit scope

If you're auditing a protocol with similar architecture to TamagochiSwap, these are the critical security checks that could have prevented this incident (August 2021).

Verify all logic paths related to Rugpull are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://bscscan.com/token/0x221471ecccdf98350988edc2f35657444d46cb9b

Threat Assessment

Severity Level

UNKNOWN

Attack Vector Rugpull
Root Cause Token
Year 2021

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