Structural Patterns

Structural patterns are deterministic heuristics for detecting common obfuscation or operational structures. They are framed as "consistent with" rather than verdicts — the engine flags the pattern, but interpretation is left to the analyst.

Currently detected patterns:

Fan-out distribution — the wallet receives funds and distributes them to many unique addresses in a way that suggests organic distribution. High entropy across counterparties.

Circular funding — funds leave the wallet and eventually return through a chain of intermediate addresses. A common layering technique.

Multi-hop obfuscation — funds are routed through multiple intermediate wallets before reaching their destination. Each hop reduces traceability.

Peel chain — small amounts are repeatedly peeled off and sent to different counterparties while a large balance is preserved.

Structuring proximity — repeated transactions in similar amount bands that suggest deliberate structuring rather than organic activity.

Each pattern produces a structural pattern record with a confidence level and a "review sensitive" flag. Review-sensitive patterns add pressure to the decision posture, pushing the analysis toward "review before proceeding" even if the base risk tier is low.

These patterns are most meaningful when they co-occur with other adverse signals. In isolation, they warrant review but not automatic escalation.