← All signals / ← Tous les signaux

Warning signal

Flash Loan Callback

The contract implements flash-loan/swap callbacks (uniswapV2Call, onFlashLoan...).

Analyzer: Source-Code Analysis
Slug: flash_loan_callback

What it means

The source implements callback entrypoints used by flash loans and flash swaps. Unusual for a plain ERC-20: it means the contract is built to participate in atomic borrow-act-repay sequences.

Why it matters

On a meme token, flash-loan plumbing usually serves price manipulation or liquidity games rather than holders. It deserves manual review every time.

How RektRadar detects it

Source regex on known callback signatures (uniswapV2Call, pancakeCall, onFlashLoan, executeOperation), raised as warning.

From our dataset

504
tokens carried this flag
387
of them classified scam
76.8%
of tokens with this flag end up classified scam
8
flagged in the last 30 days

Top brand-jacked tickers carrying this flag: $UNI-V2, $SLP, $Cake-LP, $SSLP, $USDT

Pool version of the flagged tokens that trade: V4 330 · V2 6 · V3 4

Snapshot from RektRadar's token_analysis database as of 2026-06-20.

Recent tokens with this signal

Loading recent tokens…

Analyze a token →

Related signals

Blacklist Mapping - The contract can blacklist any address from selling - a kill-list with no notice period. Owner Not Renounced - The contract still has an owner - nothing prevents a future privileged change. Upgradeable Proxy - The contract is a proxy - its logic can be swapped without users' consent. Proxy Admin Role - An admin role exists and can change the proxy's implementation contract. Beacon Proxy - Multiple contracts share a single upgradeable implementation - one switch rugs all of them.