treeship_core/statements/
mod.rs

1/// Returns the canonical MIME payloadType for a statement type suffix.
2///
3/// ```
4/// use treeship_core::statements::payload_type;
5/// assert_eq!(
6///     payload_type("action"),
7///     "application/vnd.treeship.action.v1+json"
8/// );
9/// ```
10pub fn payload_type(suffix: &str) -> String {
11    format!("application/vnd.treeship.{}.v1+json", suffix)
12}
13
14pub const TYPE_ACTION:      &str = "treeship/action/v1";
15pub const TYPE_APPROVAL:    &str = "treeship/approval/v1";
16pub const TYPE_HANDOFF:     &str = "treeship/handoff/v1";
17pub const TYPE_ENDORSEMENT: &str = "treeship/endorsement/v1";
18pub const TYPE_RECEIPT:     &str = "treeship/receipt/v1";
19pub const TYPE_BUNDLE:      &str = "treeship/bundle/v1";
20pub const TYPE_DECISION:    &str = "treeship/decision/v1";
21
22// v0.9.9 Approval Authority schemas. See `approval_use` for details on
23// the journal-side record types and the `replay_check` metadata shape
24// that verify uses to report what level of replay check actually ran.
25mod approval_use;
26pub use approval_use::{
27    ApprovalRevocation, ApprovalUse, CheckpointKind, HubCheckpointVerification,
28    JournalCheckpoint, ReplayCheck, ReplayCheckLevel,
29    TYPE_APPROVAL_REVOCATION, TYPE_APPROVAL_USE, TYPE_JOURNAL_CHECKPOINT,
30    approval_revocation_record_digest, approval_use_record_digest,
31    journal_checkpoint_record_digest, nonce_digest, verify_hub_checkpoint_signature,
32};
33
34use serde::{Deserialize, Serialize};
35
36/// A reference to content being attested, approved, or receipted.
37/// At least one field should be set.
38#[derive(Debug, Clone, Default, Serialize, Deserialize)]
39pub struct SubjectRef {
40    /// Content hash: "sha256:<hex>" or "sha3:<hex>"
41    #[serde(skip_serializing_if = "Option::is_none")]
42    pub digest: Option<String>,
43
44    /// External URI to the content
45    #[serde(skip_serializing_if = "Option::is_none")]
46    pub uri: Option<String>,
47
48    /// ID of another Treeship artifact
49    #[serde(rename = "artifactId", skip_serializing_if = "Option::is_none")]
50    pub artifact_id: Option<String>,
51}
52
53/// Scope constraints on an approval — *who* may perform *what* against
54/// *which subject*, *how many times*, and *until when*.
55///
56/// Treeship's verify pass enforces these constraints statelessly (every
57/// field except `max_actions` can be checked from the signed envelope
58/// alone). `max_actions` is signed into the grant so a future ledger /
59/// Hub layer can enforce single-use across the global view; for now it
60/// is descriptive, and verify reports the replay-check posture honestly
61/// rather than claiming enforcement that did not happen.
62///
63/// An empty `allowed_*` list means "no constraint on that axis."
64/// All-empty scope is equivalent to no scope at all (an unscoped /
65/// bearer approval) — which `verify` flags with a warning so callers
66/// know the binding is the only thing being attested.
67#[derive(Debug, Clone, Default, Serialize, Deserialize)]
68pub struct ApprovalScope {
69    /// Maximum number of actions this approval authorises. Signed into
70    /// the grant for future stateful enforcement; not yet checked
71    /// statelessly.
72    #[serde(rename = "maxActions", skip_serializing_if = "Option::is_none")]
73    pub max_actions: Option<u32>,
74
75    /// ISO 8601 timestamp after which the approval is no longer valid.
76    /// Independent of `ApprovalStatement.expires_at` so a single approval
77    /// can have an outer "key valid until X" and a tighter "scope valid
78    /// until Y" if the operator wants both. Verify enforces both.
79    #[serde(rename = "validUntil", skip_serializing_if = "Option::is_none")]
80    pub valid_until: Option<String>,
81
82    /// Actor URIs permitted to consume this approval. Empty = no
83    /// constraint on actor.
84    #[serde(rename = "allowedActors", skip_serializing_if = "Vec::is_empty", default)]
85    pub allowed_actors: Vec<String>,
86
87    /// Action labels permitted under this approval. Empty = no
88    /// constraint on action.
89    #[serde(rename = "allowedActions", skip_serializing_if = "Vec::is_empty", default)]
90    pub allowed_actions: Vec<String>,
91
92    /// Subject URIs permitted as the target of an action under this
93    /// approval. Matched against `ActionStatement.subject.uri` (or
94    /// `artifact_id` for chain-internal subjects). Empty = no
95    /// constraint on subject.
96    #[serde(rename = "allowedSubjects", skip_serializing_if = "Vec::is_empty", default)]
97    pub allowed_subjects: Vec<String>,
98
99    /// Arbitrary additional constraints (e.g. max payment amount).
100    #[serde(skip_serializing_if = "Option::is_none")]
101    pub extra: Option<serde_json::Value>,
102}
103
104impl ApprovalScope {
105    /// True when no constraint axis is populated. An unscoped approval
106    /// proves only nonce binding -- it does NOT bind actor, action, or
107    /// subject. Verify warns when this is true so the audit reader
108    /// knows the limit of what was signed.
109    pub fn is_unscoped(&self) -> bool {
110        self.max_actions.is_none()
111            && self.valid_until.is_none()
112            && self.allowed_actors.is_empty()
113            && self.allowed_actions.is_empty()
114            && self.allowed_subjects.is_empty()
115            && self.extra.is_none()
116    }
117}
118
119/// Records that an actor performed an action.
120///
121/// This is the most common statement type — every tool call, API request,
122/// file write, or agent operation produces one.
123#[derive(Debug, Clone, Serialize, Deserialize)]
124pub struct ActionStatement {
125    /// Always `TYPE_ACTION`
126    #[serde(rename = "type")]
127    pub type_: String,
128
129    /// RFC 3339 timestamp, set at sign time.
130    pub timestamp: String,
131
132    /// DID-style actor URI. e.g. "agent://researcher", "human://alice"
133    pub actor: String,
134
135    /// Dot-namespaced action label. e.g. "tool.call", "stripe.charge.create"
136    pub action: String,
137
138    #[serde(default, skip_serializing_if = "is_empty_subject")]
139    pub subject: SubjectRef,
140
141    /// Links this artifact to its parent in the chain.
142    #[serde(rename = "parentId", skip_serializing_if = "Option::is_none")]
143    pub parent_id: Option<String>,
144
145    /// Must match the `nonce` field of the approval authorising this action.
146    /// Provides cryptographic one-to-one binding between approval and action,
147    /// preventing approval reuse across multiple actions.
148    #[serde(rename = "approvalNonce", skip_serializing_if = "Option::is_none")]
149    pub approval_nonce: Option<String>,
150
151    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
152    pub policy_ref: Option<String>,
153
154    #[serde(skip_serializing_if = "Option::is_none")]
155    pub meta: Option<serde_json::Value>,
156}
157
158/// Records that an approver authorised an intent or action.
159///
160/// The `nonce` field is the cornerstone of approval security: the consuming
161/// `ActionStatement` must echo the same nonce in its `approval_nonce` field.
162/// This cryptographically binds each approval to exactly one action (or
163/// `max_actions` actions when set), preventing approval reuse.
164#[derive(Debug, Clone, Serialize, Deserialize)]
165pub struct ApprovalStatement {
166    #[serde(rename = "type")]
167    pub type_: String,
168    pub timestamp: String,
169
170    /// DID-style approver URI. e.g. "human://alice"
171    pub approver: String,
172
173    #[serde(default, skip_serializing_if = "is_empty_subject")]
174    pub subject: SubjectRef,
175
176    #[serde(skip_serializing_if = "Option::is_none")]
177    pub description: Option<String>,
178
179    /// ISO 8601 expiry timestamp. None means no expiry.
180    #[serde(rename = "expiresAt", skip_serializing_if = "Option::is_none")]
181    pub expires_at: Option<String>,
182
183    /// Whether the receiving actor may re-delegate this approval.
184    pub delegatable: bool,
185
186    /// Random token. The consuming ActionStatement must set its
187    /// `approval_nonce` field to this value. Generated by the SDK if
188    /// not provided by the caller.
189    pub nonce: String,
190
191    #[serde(skip_serializing_if = "Option::is_none")]
192    pub scope: Option<ApprovalScope>,
193
194    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
195    pub policy_ref: Option<String>,
196
197    #[serde(skip_serializing_if = "Option::is_none")]
198    pub meta: Option<serde_json::Value>,
199}
200
201/// Records that work moved from one actor/domain to another.
202///
203/// This is the core of Treeship's multi-agent trust story. A handoff
204/// artifact proves custody transfer and carries inherited approvals.
205#[derive(Debug, Clone, Serialize, Deserialize)]
206pub struct HandoffStatement {
207    #[serde(rename = "type")]
208    pub type_: String,
209    pub timestamp: String,
210
211    /// Source actor URI
212    pub from: String,
213    /// Destination actor URI
214    pub to: String,
215
216    /// IDs of artifacts being transferred
217    pub artifacts: Vec<String>,
218
219    /// Approval artifact IDs the receiving actor inherits
220    #[serde(rename = "approvalIds", default, skip_serializing_if = "Vec::is_empty")]
221    pub approval_ids: Vec<String>,
222
223    /// Constraints the receiving actor must satisfy
224    #[serde(default, skip_serializing_if = "Vec::is_empty")]
225    pub obligations: Vec<String>,
226
227    pub delegatable: bool,
228
229    #[serde(rename = "taskRef", skip_serializing_if = "Option::is_none")]
230    pub task_ref: Option<String>,
231
232    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
233    pub policy_ref: Option<String>,
234
235    #[serde(skip_serializing_if = "Option::is_none")]
236    pub meta: Option<serde_json::Value>,
237}
238
239/// Records that a signer asserts confidence about an existing artifact.
240///
241/// Used for post-hoc validation, compliance sign-off, countersignatures.
242#[derive(Debug, Clone, Serialize, Deserialize)]
243pub struct EndorsementStatement {
244    #[serde(rename = "type")]
245    pub type_: String,
246    pub timestamp: String,
247
248    /// DID-style endorser URI
249    pub endorser: String,
250    pub subject: SubjectRef,
251
252    /// Endorsement category: "validation", "compliance", "countersignature",
253    /// "review", or any custom string.
254    pub kind: String,
255
256    #[serde(skip_serializing_if = "Option::is_none")]
257    pub rationale: Option<String>,
258
259    #[serde(rename = "expiresAt", skip_serializing_if = "Option::is_none")]
260    pub expires_at: Option<String>,
261
262    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
263    pub policy_ref: Option<String>,
264
265    #[serde(skip_serializing_if = "Option::is_none")]
266    pub meta: Option<serde_json::Value>,
267}
268
269impl EndorsementStatement {
270    pub fn new(endorser: impl Into<String>, kind: impl Into<String>) -> Self {
271        Self {
272            type_: TYPE_ENDORSEMENT.into(),
273            timestamp: now_rfc3339(),
274            endorser: endorser.into(),
275            subject: SubjectRef::default(),
276            kind: kind.into(),
277            rationale: None,
278            expires_at: None,
279            policy_ref: None,
280            meta: None,
281        }
282    }
283}
284
285/// Records that an external system observed or confirmed an event.
286///
287/// Used for Stripe webhooks, RFC 3161 timestamps, inclusion proofs.
288#[derive(Debug, Clone, Serialize, Deserialize)]
289pub struct ReceiptStatement {
290    #[serde(rename = "type")]
291    pub type_: String,
292    pub timestamp: String,
293
294    /// URI of the system producing this receipt.
295    /// e.g. "system://stripe-webhook", "system://tsauthority"
296    pub system: String,
297
298    #[serde(skip_serializing_if = "Option::is_none")]
299    pub subject: Option<SubjectRef>,
300
301    /// Receipt category: "confirmation", "timestamp", "inclusion", "webhook"
302    pub kind: String,
303
304    #[serde(skip_serializing_if = "Option::is_none")]
305    pub payload: Option<serde_json::Value>,
306
307    #[serde(rename = "payloadDigest", skip_serializing_if = "Option::is_none")]
308    pub payload_digest: Option<String>,
309
310    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
311    pub policy_ref: Option<String>,
312
313    #[serde(skip_serializing_if = "Option::is_none")]
314    pub meta: Option<serde_json::Value>,
315}
316
317/// A reference to one artifact within a bundle.
318#[derive(Debug, Clone, Serialize, Deserialize)]
319pub struct ArtifactRef {
320    pub id:     String,
321    pub digest: String,
322    #[serde(rename = "type")]
323    pub type_:  String,
324}
325
326/// Groups a set of artifacts into a named, signed bundle.
327#[derive(Debug, Clone, Serialize, Deserialize)]
328pub struct BundleStatement {
329    #[serde(rename = "type")]
330    pub type_: String,
331    pub timestamp: String,
332
333    #[serde(skip_serializing_if = "Option::is_none")]
334    pub tag: Option<String>,
335
336    #[serde(skip_serializing_if = "Option::is_none")]
337    pub description: Option<String>,
338
339    pub artifacts: Vec<ArtifactRef>,
340
341    #[serde(rename = "policyRef", skip_serializing_if = "Option::is_none")]
342    pub policy_ref: Option<String>,
343
344    #[serde(skip_serializing_if = "Option::is_none")]
345    pub meta: Option<serde_json::Value>,
346}
347
348/// Records an agent's reasoning and decision context.
349///
350/// This is the "why" layer -- agents provide this explicitly to explain
351/// inference decisions, model usage, and confidence levels.
352#[derive(Debug, Clone, Serialize, Deserialize)]
353pub struct DecisionStatement {
354    /// Always `TYPE_DECISION`
355    #[serde(rename = "type")]
356    pub type_: String,
357
358    /// RFC 3339 timestamp, set at sign time.
359    pub timestamp: String,
360
361    /// DID-style actor URI. e.g. "agent://analyst"
362    pub actor: String,
363
364    /// Links this artifact to its parent in the chain.
365    #[serde(rename = "parentId", skip_serializing_if = "Option::is_none")]
366    pub parent_id: Option<String>,
367
368    /// Model used for inference. e.g. "claude-opus-4"
369    #[serde(skip_serializing_if = "Option::is_none")]
370    pub model: Option<String>,
371
372    /// Model version if known.
373    #[serde(rename = "modelVersion", skip_serializing_if = "Option::is_none")]
374    pub model_version: Option<String>,
375
376    /// Number of input tokens consumed.
377    #[serde(rename = "tokensIn", skip_serializing_if = "Option::is_none")]
378    pub tokens_in: Option<u64>,
379
380    /// Number of output tokens produced.
381    #[serde(rename = "tokensOut", skip_serializing_if = "Option::is_none")]
382    pub tokens_out: Option<u64>,
383
384    /// SHA-256 digest of the full prompt (not the prompt itself).
385    #[serde(rename = "promptDigest", skip_serializing_if = "Option::is_none")]
386    pub prompt_digest: Option<String>,
387
388    /// Human-readable summary of the decision.
389    #[serde(skip_serializing_if = "Option::is_none")]
390    pub summary: Option<String>,
391
392    /// Confidence level 0.0-1.0 if the agent provides it.
393    #[serde(skip_serializing_if = "Option::is_none")]
394    pub confidence: Option<f64>,
395
396    /// Other options the agent considered.
397    #[serde(skip_serializing_if = "Option::is_none")]
398    pub alternatives: Option<Vec<String>>,
399
400    /// Arbitrary additional metadata.
401    #[serde(skip_serializing_if = "Option::is_none")]
402    pub meta: Option<serde_json::Value>,
403}
404
405// Helpers for skip_serializing_if
406fn is_empty_subject(s: &SubjectRef) -> bool {
407    s.digest.is_none() && s.uri.is_none() && s.artifact_id.is_none()
408}
409
410// --- Constructors ---
411
412impl ActionStatement {
413    pub fn new(actor: impl Into<String>, action: impl Into<String>) -> Self {
414        Self {
415            type_: TYPE_ACTION.into(),
416            timestamp: now_rfc3339(),
417            actor: actor.into(),
418            action: action.into(),
419            subject: SubjectRef::default(),
420            parent_id: None,
421            approval_nonce: None,
422            policy_ref: None,
423            meta: None,
424        }
425    }
426}
427
428impl ApprovalStatement {
429    pub fn new(approver: impl Into<String>, nonce: impl Into<String>) -> Self {
430        Self {
431            type_: TYPE_APPROVAL.into(),
432            timestamp: now_rfc3339(),
433            approver: approver.into(),
434            subject: SubjectRef::default(),
435            description: None,
436            expires_at: None,
437            delegatable: false,
438            nonce: nonce.into(),
439            scope: None,
440            policy_ref: None,
441            meta: None,
442        }
443    }
444}
445
446impl HandoffStatement {
447    pub fn new(
448        from:      impl Into<String>,
449        to:        impl Into<String>,
450        artifacts: Vec<String>,
451    ) -> Self {
452        Self {
453            type_: TYPE_HANDOFF.into(),
454            timestamp: now_rfc3339(),
455            from: from.into(),
456            to: to.into(),
457            artifacts,
458            approval_ids: vec![],
459            obligations: vec![],
460            delegatable: false,
461            task_ref: None,
462            policy_ref: None,
463            meta: None,
464        }
465    }
466}
467
468impl ReceiptStatement {
469    pub fn new(system: impl Into<String>, kind: impl Into<String>) -> Self {
470        Self {
471            type_: TYPE_RECEIPT.into(),
472            timestamp: now_rfc3339(),
473            system: system.into(),
474            subject: None,
475            kind: kind.into(),
476            payload: None,
477            payload_digest: None,
478            policy_ref: None,
479            meta: None,
480        }
481    }
482}
483
484impl DecisionStatement {
485    pub fn new(actor: impl Into<String>) -> Self {
486        Self {
487            type_: TYPE_DECISION.into(),
488            timestamp: now_rfc3339(),
489            actor: actor.into(),
490            parent_id: None,
491            model: None,
492            model_version: None,
493            tokens_in: None,
494            tokens_out: None,
495            prompt_digest: None,
496            summary: None,
497            confidence: None,
498            alternatives: None,
499            meta: None,
500        }
501    }
502}
503
504fn now_rfc3339() -> String {
505    // std::time gives us duration since UNIX_EPOCH.
506    // Format as ISO 8601 / RFC 3339 without pulling in chrono.
507    use std::time::{SystemTime, UNIX_EPOCH};
508    let secs = SystemTime::now()
509        .duration_since(UNIX_EPOCH)
510        .unwrap_or_default()
511        .as_secs();
512    unix_to_rfc3339(secs)
513}
514
515pub fn unix_to_rfc3339(secs: u64) -> String {
516    // Minimal RFC 3339 formatter — no external deps.
517    // Accurate for dates 1970–2099.
518    let s = secs;
519    let (y, mo, d, h, mi, sec) = seconds_to_ymd_hms(s);
520    format!("{:04}-{:02}-{:02}T{:02}:{:02}:{:02}Z", y, mo, d, h, mi, sec)
521}
522
523fn seconds_to_ymd_hms(s: u64) -> (u64, u64, u64, u64, u64, u64) {
524    let sec  = s % 60;
525    let mins = s / 60;
526    let min  = mins % 60;
527    let hrs  = mins / 60;
528    let hour = hrs % 24;
529    let days = hrs / 24;
530
531    // Gregorian calendar calculation from day count
532    let (y, m, d) = days_to_ymd(days);
533    (y, m, d, hour, min, sec)
534}
535
536fn days_to_ymd(days: u64) -> (u64, u64, u64) {
537    // Days since 1970-01-01
538    let mut d = days;
539    let mut year = 1970u64;
540    loop {
541        let dy = if is_leap(year) { 366 } else { 365 };
542        if d < dy { break; }
543        d -= dy;
544        year += 1;
545    }
546    let months = if is_leap(year) {
547        [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
548    } else {
549        [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
550    };
551    let mut month = 1u64;
552    for dm in months {
553        if d < dm { break; }
554        d -= dm;
555        month += 1;
556    }
557    (year, month, d + 1)
558}
559
560fn is_leap(y: u64) -> bool {
561    (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)
562}
563
564#[cfg(test)]
565mod tests {
566    use super::*;
567    use crate::attestation::{sign, Ed25519Signer, Verifier};
568
569    #[test]
570    fn payload_type_format() {
571        assert_eq!(
572            payload_type("action"),
573            "application/vnd.treeship.action.v1+json"
574        );
575        assert_eq!(
576            payload_type("approval"),
577            "application/vnd.treeship.approval.v1+json"
578        );
579    }
580
581    #[test]
582    fn action_statement_sign_verify() {
583        let signer   = Ed25519Signer::generate("key_test").unwrap();
584        let verifier = Verifier::from_signer(&signer);
585
586        let mut stmt = ActionStatement::new("agent://researcher", "tool.call");
587        stmt.parent_id = Some("art_aabbccdd11223344aabbccdd11223344".into());
588
589        let pt     = payload_type("action");
590        let result = sign(&pt, &stmt, &signer).unwrap();
591
592        assert!(result.artifact_id.starts_with("art_"));
593
594        let vr = verifier.verify(&result.envelope).unwrap();
595        assert_eq!(vr.artifact_id, result.artifact_id);
596
597        // Decode and check the payload survived serialization
598        let decoded: ActionStatement = result.envelope.unmarshal_statement().unwrap();
599        assert_eq!(decoded.actor, "agent://researcher");
600        assert_eq!(decoded.action, "tool.call");
601        assert_eq!(decoded.type_, TYPE_ACTION);
602    }
603
604    #[test]
605    fn approval_statement_with_nonce() {
606        let signer = Ed25519Signer::generate("key_human").unwrap();
607
608        let mut approval = ApprovalStatement::new("human://alice", "nonce_abc123");
609        approval.description = Some("approve laptop purchase < $1500".into());
610        approval.scope = Some(ApprovalScope {
611            max_actions: Some(1),
612            allowed_actions: vec!["stripe.payment_intent.create".into()],
613            ..Default::default()
614        });
615
616        let pt     = payload_type("approval");
617        let result = sign(&pt, &approval, &signer).unwrap();
618        assert!(result.artifact_id.starts_with("art_"));
619
620        let decoded: ApprovalStatement = result.envelope.unmarshal_statement().unwrap();
621        assert_eq!(decoded.nonce, "nonce_abc123");
622        assert_eq!(decoded.scope.unwrap().max_actions, Some(1));
623    }
624
625    #[test]
626    fn approval_scope_full_grant_roundtrips() {
627        // Every scope axis populated -- the full "allowed_actors +
628        // allowed_actions + allowed_subjects + max_uses" grant must
629        // serialize, sign, deserialize, and read back identically.
630        let signer = Ed25519Signer::generate("key_piyush").unwrap();
631
632        let mut approval = ApprovalStatement::new("human://piyush", "nonce_deadbeef");
633        approval.description = Some("Deploy production after final review".into());
634        approval.scope = Some(ApprovalScope {
635            max_actions:      Some(1),
636            valid_until:      None,
637            allowed_actors:   vec!["agent://deployer".into()],
638            allowed_actions:  vec!["deploy.production".into()],
639            allowed_subjects: vec!["env://production".into()],
640            extra:            None,
641        });
642
643        let pt = payload_type("approval");
644        let result = sign(&pt, &approval, &signer).unwrap();
645        let decoded: ApprovalStatement = result.envelope.unmarshal_statement().unwrap();
646        let scope = decoded.scope.expect("scope must round-trip");
647
648        assert_eq!(scope.allowed_actors,   vec!["agent://deployer".to_string()]);
649        assert_eq!(scope.allowed_actions,  vec!["deploy.production".to_string()]);
650        assert_eq!(scope.allowed_subjects, vec!["env://production".to_string()]);
651        assert_eq!(scope.max_actions,      Some(1));
652    }
653
654    #[test]
655    fn approval_scope_is_unscoped_predicate() {
656        // Default scope = unscoped.
657        assert!(ApprovalScope::default().is_unscoped());
658
659        // Any single populated axis flips the predicate.
660        assert!(!ApprovalScope { max_actions: Some(1), ..Default::default() }.is_unscoped());
661        assert!(!ApprovalScope { valid_until: Some("2030-01-01T00:00:00Z".into()), ..Default::default() }.is_unscoped());
662        assert!(!ApprovalScope { allowed_actors:   vec!["agent://x".into()], ..Default::default() }.is_unscoped());
663        assert!(!ApprovalScope { allowed_actions:  vec!["doit".into()],      ..Default::default() }.is_unscoped());
664        assert!(!ApprovalScope { allowed_subjects: vec!["env://prod".into()], ..Default::default() }.is_unscoped());
665    }
666
667    #[test]
668    fn approval_scope_legacy_payloads_decode_with_empty_new_fields() {
669        // Pre-0.9.6 payloads that omitted allowed_actors / allowed_subjects
670        // must continue to deserialize cleanly. We construct the JSON shape
671        // directly to simulate an envelope from an older signer.
672        let legacy = serde_json::json!({
673            "maxActions": 1,
674            "allowedActions": ["stripe.payment_intent.create"]
675        });
676        let scope: ApprovalScope = serde_json::from_value(legacy).unwrap();
677        assert_eq!(scope.max_actions, Some(1));
678        assert_eq!(scope.allowed_actions, vec!["stripe.payment_intent.create".to_string()]);
679        // New fields default to empty -- not present in legacy payload.
680        assert!(scope.allowed_actors.is_empty());
681        assert!(scope.allowed_subjects.is_empty());
682        assert!(!scope.is_unscoped()); // because max_actions IS set
683    }
684
685    #[test]
686    fn handoff_statement() {
687        let signer = Ed25519Signer::generate("key_agent").unwrap();
688
689        let handoff = HandoffStatement::new(
690            "agent://researcher",
691            "agent://checkout",
692            vec!["art_aabbccdd11223344aabbccdd11223344".into()],
693        );
694
695        let pt     = payload_type("handoff");
696        let result = sign(&pt, &handoff, &signer).unwrap();
697        let decoded: HandoffStatement = result.envelope.unmarshal_statement().unwrap();
698
699        assert_eq!(decoded.from, "agent://researcher");
700        assert_eq!(decoded.to,   "agent://checkout");
701        assert_eq!(decoded.artifacts.len(), 1);
702    }
703
704    #[test]
705    fn receipt_statement() {
706        let signer = Ed25519Signer::generate("key_system").unwrap();
707
708        let mut receipt = ReceiptStatement::new("system://stripe-webhook", "confirmation");
709        receipt.payload = Some(serde_json::json!({
710            "eventId": "evt_abc123",
711            "status": "succeeded"
712        }));
713
714        let pt     = payload_type("receipt");
715        let result = sign(&pt, &receipt, &signer).unwrap();
716        let decoded: ReceiptStatement = result.envelope.unmarshal_statement().unwrap();
717
718        assert_eq!(decoded.system, "system://stripe-webhook");
719        assert_eq!(decoded.kind,   "confirmation");
720    }
721
722    #[test]
723    fn nonce_binding_survives_serialization() {
724        let signer   = Ed25519Signer::generate("key_test").unwrap();
725
726        // The nonce in the approval must survive a sign→verify→decode round-trip.
727        // The verifier checks that action.approval_nonce == approval.nonce.
728        let approval = ApprovalStatement::new("human://alice", "secure_nonce_xyz");
729        let pt       = payload_type("approval");
730        let signed   = sign(&pt, &approval, &signer).unwrap();
731
732        let decoded: ApprovalStatement = signed.envelope.unmarshal_statement().unwrap();
733        assert_eq!(decoded.nonce, "secure_nonce_xyz", "nonce must survive serialization");
734    }
735
736    #[test]
737    fn decision_statement_sign_verify() {
738        let signer = Ed25519Signer::generate("key_test").unwrap();
739        let verifier = Verifier::from_signer(&signer);
740
741        let mut stmt = DecisionStatement::new("agent://analyst");
742        stmt.model = Some("claude-opus-4".into());
743        stmt.tokens_in = Some(8432);
744        stmt.tokens_out = Some(1247);
745        stmt.summary = Some("Contract looks standard.".into());
746        stmt.confidence = Some(0.91);
747
748        let pt = payload_type("decision");
749        let result = sign(&pt, &stmt, &signer).unwrap();
750
751        assert!(result.artifact_id.starts_with("art_"));
752
753        let vr = verifier.verify(&result.envelope).unwrap();
754        assert_eq!(vr.artifact_id, result.artifact_id);
755
756        // Decode and check the payload survived serialization
757        let decoded: DecisionStatement = result.envelope.unmarshal_statement().unwrap();
758        assert_eq!(decoded.actor, "agent://analyst");
759        assert_eq!(decoded.model, Some("claude-opus-4".into()));
760        assert_eq!(decoded.tokens_in, Some(8432));
761        assert_eq!(decoded.tokens_out, Some(1247));
762        assert_eq!(decoded.summary, Some("Contract looks standard.".into()));
763        assert_eq!(decoded.confidence, Some(0.91));
764        assert_eq!(decoded.type_, TYPE_DECISION);
765    }
766
767    #[test]
768    fn different_statement_types_different_ids() {
769        // Action and approval with identical fields but different types
770        // must produce different artifact IDs — enforced by payloadType in PAE.
771        let signer = Ed25519Signer::generate("key_test").unwrap();
772
773        let action   = ActionStatement::new("agent://test", "do.thing");
774        let approval = ApprovalStatement::new("human://test", "nonce_123");
775
776        let r_action   = sign(&payload_type("action"),   &action,   &signer).unwrap();
777        let r_approval = sign(&payload_type("approval"), &approval, &signer).unwrap();
778
779        assert_ne!(r_action.artifact_id, r_approval.artifact_id);
780    }
781
782    #[test]
783    fn timestamp_format() {
784        let ts = unix_to_rfc3339(0);
785        assert_eq!(ts, "1970-01-01T00:00:00Z");
786
787        let ts2 = unix_to_rfc3339(1_000_000_000);
788        assert_eq!(ts2, "2001-09-09T01:46:40Z");
789    }
790}
treeship_core/statements/mod.rs

treeship_core/statements/
mod.rs
