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127 lines
4.7 KiB
Markdown
127 lines
4.7 KiB
Markdown
# AURA trust-check adapter
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Opt-in, **read-only** counterparty reputation for agent hosts. One HTTP GET
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answers *"can I trust this agent before I delegate work or settle a payment?"*
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- **Zero dependencies** — pure Python stdlib. Vendor the `aura/` folder, no `pip install`.
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- **Read-only** — the only network call is `GET /check?did=...`. No auth, no API key.
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- **No coupling** — does not sign, hold keys, move funds, or touch your wallet.
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- **Off by default** — nothing runs until you call it. Disabled = delete the import.
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## Enable (opt-in)
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It's a gate you call explicitly at a trust boundary — there is no global hook,
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no monkey-patching, no background calls. Wrap the action you want to protect:
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```python
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from aura import before_settle, AuraUntrusted
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def settle(counterparty_did: str, amount: float) -> None:
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try:
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before_settle(counterparty_did) # rejects high_risk + unknown
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except AuraUntrusted as e:
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log.warning("blocked: %s", e)
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return # your policy decides what to do
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pay(counterparty_did, amount) # your existing logic, untouched
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```
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Prefer to read the verdict yourself instead of raising?
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```python
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from aura import aura_verdict
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v = aura_verdict(counterparty_did)
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print(v.verdict) # trusted | caution | high_risk | new | unknown
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print(v.reason) # human-readable explanation
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print(v.score) # composite 0..1, or None when there's no history
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print(v.ok) # True for trusted/caution
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# v.dimensions tells you *which* axis is weak, not just the aggregate:
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if v.dimensions and v.dimensions.get("financial_integrity", 1) < 0.4:
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require_manual_review() # placeholder for your own policy
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```
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> `v.ok` reflects the *verdict class* (True for `trusted`/`caution`), not the
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> outcome of `require_trust()` — the gate's default `allow` also lets `new`
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> through. Use the gate's return/raise for the decision, `v.ok` for display.
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## Verdicts
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| verdict | meaning | `ok` |
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|---|---|---|
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| `trusted` | strong on-chain track record (composite >= 0.70) | yes |
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| `caution` | mixed history (0.40-0.70) | yes |
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| `high_risk` | poor track record (< 0.40) | no |
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| `new` | registered identity, no interactions yet | no |
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| `unknown` | no track record, or AURA was unreachable | no |
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## Policy knobs
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```python
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# Reject brand-new agents too (strict):
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before_settle(did, allow=("trusted", "caution"))
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# Treat an *unreachable* AURA as a pass (fail-open). Off by default —
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# absence of evidence is not evidence of trust.
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before_settle(did, fail_open=True)
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# Point at a self-hosted / staging gateway:
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before_settle(did, base_url="https://my-aura-mirror.example", timeout=5)
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```
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`require_trust` is an alias of `before_settle` for non-payment call sites.
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## Failure behavior
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`aura_verdict()` **never raises on a network or parse error** — it returns an
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`unknown` verdict with the reason set. The gate then decides:
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- **default (`fail_open=False`)** — `unknown` is rejected → an unreachable AURA
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blocks the action. *Fail-closed.*
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- **`fail_open=True`** — `unknown` from an unreachable endpoint is allowed
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through, so AURA can never take your flow down. *Fail-open.*
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This keeps the trust signal **purely additive**: if you remove the adapter or
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AURA is down, your existing allow/deny logic runs exactly as before.
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## Tests
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Offline — every call replays a recorded `/check` body, no network:
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```bash
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python -m pytest aura/tests -q
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```
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Covers all five verdict classes, the gate's allow-list + `fail_open`, the
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unreachable path, and input validation. See `tests/fixtures.py` for the
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recorded response shapes.
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## Boundary & threats
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See [THREAT_MODEL.md](./THREAT_MODEL.md) — what the verdict does and does not
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prove, and the failure modes a verifier should account for.
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## Carry the AURA badge
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Show your live trust verdict in your own README — it updates automatically and
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links back to your AURA profile:
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```markdown
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[](https://agent.auraopenprotocol.org/check?did=YOUR_DID)
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```
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A shields-style badge colored by verdict (`trusted` green, `caution` amber,
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`high_risk` red, `new` blue, `unknown` grey). Add `&score=1` to show the
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composite score. No DID yet? The bare badge is a generic mark:
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```markdown
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[](https://auraopenprotocol.org)
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```
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## What's behind the verdict
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[AURA Open Protocol](https://auraopenprotocol.org) — W3C DID identity plus 8
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on-chain reputation dimensions on Base L2 (`task_completion`, `delivery_speed`,
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`output_quality`, `honesty`, `financial_integrity`, `security_compliance`,
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`collaboration`, `dispute_history`). Docs: [AURA developer docs](https://dev.auraopenprotocol.org)
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