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Warning signal

Blacklist Mapping

A blacklist/banned/isBlacklisted mapping sits in the contract's storage.

Analyzer: Source-Code Analysis
Slug: blacklist_mapping

What it means

The source declares a mapping named blacklist, banned or isBlacklisted. Even without an obvious setter, transfer paths can consult it to block selected addresses.

Why it matters

The mapping is the infrastructure of selective trapping. Combined with any owner-controlled write path it means your address can be turned off - after you bought.

How RektRadar detects it

Source regex on blacklist-style mapping declarations, raised by the source-code analyzer alongside the setter-focused blacklist_function.

From our dataset

289
tokens carried this flag
249
of them classified scam
86.2%
of tokens with this flag end up classified scam
20
flagged in the last 30 days

Top brand-jacked tickers carrying this flag: $USDT, $PWOJAK, $BITCOIN, $PEPE56, $ASTRA

Pool version of the flagged tokens that trade: V4 94 · V2 75 · V3 19

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

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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.