What is a Rug Pull?
How it works
Most rug pulls target the liquidity pool that makes a new token tradable. The deployer pairs their token with ETH or a stablecoin on an AMM such as Uniswap and receives LP tokens representing that position. As buyers swap real value into the pool, the deployer simply redeems the LP tokens, withdrawing both sides of the pool — including everyone else's ETH — and the token price collapses to near zero in a single transaction.
Contract-level variants achieve the same theft without touching the pool. A hidden or owner-only mint function lets insiders inflate supply and dump it; an upgradeable proxy lets them swap in malicious logic after launch; honeypot code blocks sells for everyone except whitelisted addresses using transfer restrictions or a sell tax set near 100%, so buyers can enter but never exit.
Soft rug pulls are slower: the team keeps a large, unlocked token allocation, markets aggressively, sells into the demand over weeks, then quietly abandons development. Classic red flags across all variants include unlocked or unburned LP tokens, unrenounced contract ownership without a timelock, unverified source code, a handful of wallets holding most of the supply, and a fully anonymous team.
Why it matters
Token launches in DeFi are permissionless — anyone can deploy a contract and seed a pool in minutes, with no listing review. That openness is exactly what makes rug pulls one of the most common fraud categories in crypto: on-chain analyses by firms like Chainalysis have repeatedly found exit scams responsible for a large share of annual fraud losses. The threat also shaped today's due-diligence norms — liquidity locks, ownership renouncement, third-party audits, and token-scanner tooling all exist largely as anti-rug measures. If you touch new or long-tail tokens at all, recognizing rug mechanics is the difference between a calculated risk and donating your funds.
Real-world examples
AnubisDAO (October 2021) is a canonical hard rug pull. The anonymous project, riding OlympusDAO-fork hype with little more than a Twitter account and a dog logo, raised roughly 13,556 ETH — about $60 million at the time — in a liquidity bootstrapping event. Around 20 hours after launch, the raised ETH was moved out to an external wallet and dispersed. The token became worthless, and the funds were never recovered.
FAQ
What is the difference between a hard and a soft rug pull?
A hard rug is a sudden technical drain — pulling pool liquidity, exploiting a hidden mint function, or trapping buyers with honeypot code — often executed within hours of launch. A soft rug is gradual: insiders sell down a large unlocked allocation over weeks while hype lasts, then abandon the project. Hard rugs are easier to prove as fraud; soft rugs blur into ordinary project failure.
How can I spot a likely rug pull before buying?
Check whether LP tokens are locked or burned, whether contract ownership is renounced or behind a timelock, and whether the verified source code contains mint, blacklist, or fee-change backdoors. Look at holder distribution — a few wallets controlling most supply is a warning — and whether the team is publicly identifiable. Automated token scanners help surface these flags but are not definitive.
Are rug pulls illegal?
Generally yes — prosecutors treat them as fraud, and the US DOJ has charged rug pull operators (the Frosties NFT case in 2022 was an early example). In practice, anonymous teams, mixers, and cross-border jurisdiction make identification and recovery rare, so prevention through due diligence matters far more than legal recourse after the fact.
Related terms
Go deeper
Browse the complete crypto glossary to explore related terms and concepts.
Browse Glossary