aiken-dex-security-audit

name	aiken-dex-security-audit
description	Adversarial security audit playbook for Plutus V3 Aiken DEX contracts (threat model, invariants, findings, tests, tx repro shapes).
metadata	{"domain":"cardano","language":"aiken","category":"security-audit"}

aiken-dex-security-audit

When to use

• Auditing Plutus V3 Aiken contracts for a DEX (validators + minting policies)
• You need a rigorous report: threat model, invariants, findings, and reproducible exploit tx shapes

Non-negotiable rules

• No hallucinations. If something isn't in the repo or inputs, say unknown and list exactly what's missing.
• Assume a hostile attacker can craft arbitrary transactions: multi-input, multi-action, weird datums, weird token bundles.
• Never ask for or handle seed phrases / private keys.
• Prefer evidence over vibes: minimal tx shape + failing test + fix + passing test.

Required inputs (ask for anything missing)

1. Script list + purpose (spend/mint/reward/cert) and which are critical path for swaps/liquidity
2. Datum/redeemer schemas (Aiken types + encoding expectations)
3. Parameters/config: policy IDs, script hashes, upgrade/admin controls, oracle deps (if any)
4. Off-chain tx builder(s) in scope (where swaps/liquidity txs are constructed)
5. Network assumptions (mainnet/preprod) + constraints (tx size, exunits, reference scripts, inline datums)

Audit workflow (do ALL)

1. Build a system model
   • Map state UTxOs, assets, script addresses, and transitions (inputs/outputs/mint/burn/signees/time).
2. Extract explicit invariants (testable)
   • Value conservation, LP supply rules, fee bounds/rounding, auth rules, "exactly-one state UTxO", bounded datum/value growth.
3. Threat model & attack surface
   • Attacker capabilities in eUTxO; trusted roles; upgrade/emergency keys; oracles; economic/griefing vectors.
4. Manual on-chain review
   • For each validator/policy branch: what must be true about inputs/outputs/minted/signers/time?
   • Hunt: double satisfaction, fake-state UTxOs, asset-class mismatches, optional datum gotchas, unbounded growth, time-range bugs, division/rounding/negative amounts, "exactly one" enforcement bugs.
   • For each issue: minimal exploitable tx shape + why it works (use tx-shapes template).
5. Off-chain review (if in scope)
   • Ensure builder cannot construct valid-but-unsafe txs or mis-hash datums or mis-handle mint fields.
6. Evidence suite (Aiken-first)
   • Add unit tests + property tests for each invariant + each exploit regression test.
7. Budget & DoS analysis
   • Identify evaluation hotspots and griefing paths; recommend safe refactors.
8. Report
   • Use templates/audit-report.md and include: scope, assumptions, invariants, findings table, patches, tests, deployment checklist.

Files to use

• Full framework prompt: references/audit-framework.md
• Report template: templates/audit-report.md
• Invariants checklist: templates/invariants-checklist.md
• Minimal exploit tx shapes: templates/tx-shapes.md