jev-guard (klauswg)
Crypto exchange risk gateway where Jev triages deposits and withdrawals while hard rules and Java code make the final call.
Overview
jev-guard by klauswg is a real-time risk triage gateway for crypto exchange deposits and withdrawals. Given a transfer and its 24-hour behavioural features, it decides who should handle it: auto-pass, human review or freeze. Jev supplies a risk level (Score), a behavioural pattern (Choice) and a freeze probability (Noul), while thresholds, a routing matrix and the final action stay in Java where they can be tested and audited.
A hard-rule layer (blacklist, sanctioned counterparty, amounts over $500k) vetoes before any model call. High-risk withdrawals freeze and are never downgraded, while high-risk deposits, already on chain, go to account review. Jev's own route suggestion is recorded but never executed; the README reports 72 percent agreement with the composed decision, which is why composition stays in code. Timeouts and errors degrade to manual review. External strings are sanitised against prompt injection, and a 100-sample three-column calibration compares rules only, Jev and combined.
What the decision model decides
| Type | Question | Answers |
|---|---|---|
| Score | What is the risk level of this transfer? | — |
| Choice | Which behavioural pattern does it show? | — |
| Yes / no | Should this transfer be frozen? | — |
How it works
- Build 24-hour behavioural features for the transfer
- Hard rules veto blacklisted, sanctioned or oversized transfers
- Render sanitised state and ask Jev four questions
- Java gate composes pass, review or freeze by direction; errors go to manual review
Strengths
- Model never has the last word
- Direction-aware handling of irreversible withdrawals
- Calibration against a rules-only baseline
Caveats
- 100-sample calibration
- Synthetic or limited data as stated in the README limitations
At a glance
- Type
- Service
- Status
- prototype
- Language
- Java
- Runtime
- Gateway service
- Has code
- yes
- Has tests
- yes
- Stars
- 36
Use cases and integrations
How curated lists describe it
Exchange risk operations: screens crypto exchange deposits and withdrawals with Jev triage (risk level, behavioral pattern, freeze probability) while hard rules veto and Java composes the final action, with a published 100-sample three-column calibration against a rules-only baseline.
yibie/awesome-jevReal-time risk triage gateway for exchange deposits and withdrawals — Jev (TypeSafe System One) handles triage only; adjudication stays in deterministic code.
wh000wh000/awesome-jev-liveReal-time deposit/withdrawal risk-triage gateway for crypto exchanges: Jev answers four typed questions per transfer while a hard-rule layer vetoes and a direction-aware Java gate composes the final action; ships a 100-sample, three-column calibration (rules-only vs Jev vs combined) with stated limitations.
cobanov/awesome-jevReal-time risk triage gateway for exchange deposits and withdrawals — Jev (TypeSafe System One) handles triage only; adjudication stays in deterministic code.
hellogumbo/awesome-jev
Frequently asked questions
What does Jev decide?
Risk level, behavioural pattern and freeze probability for each transfer.
Who makes the final decision?
Deterministic Java code after hard-rule vetoes.
What happens if Jev fails?
The transfer goes to manual review, never auto-pass.
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