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backend/app/voice/call_resolver.py

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+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from ..models import PhoneNumber, VoiceCall
+from .validators import format_bonvoice_destination, normalize_phone_digits
+
+
+def find_inbound_by_did(db: Session, did_value: str) -> PhoneNumber | None:
+    did = normalize_phone_digits(did_value)
+    if len(did) != 10:
+        return None
+    return db.scalar(
+        select(PhoneNumber).where(
+            PhoneNumber.phone_number == did,
+            PhoneNumber.status == "assigned",
+            PhoneNumber.user_id.is_not(None),
+        )
+    )
+
+
+def _phone_variants(value: str) -> set[str]:
+    raw = value.strip()
+    normalized = normalize_phone_digits(raw)
+    variants = {raw, normalized, format_bonvoice_destination(raw)}
+    if len(normalized) == 10:
+        variants.add(f"91{normalized}")
+    return {item for item in variants if item}
+
+
+def find_pending_outbound_call(db: Session, *, from_value: str, to_value: str) -> VoiceCall | None:
+    """
+    Match a pending outbound call to Bonvoice media `start`.
+
+    Outbound Bonvoice streams report:
+      - `to`   = leg-A caller ID (purchased DID, e.g. 7946350706)
+      - `from` = destination/callee (e.g. 919149154337)
+    """
+    did_candidates = _phone_variants(to_value)
+    owned_dids = {
+        normalize_phone_digits(value)
+        for value in did_candidates
+        if len(normalize_phone_digits(value)) == 10
+    }
+    if not owned_dids:
+        return None
+
+    candidates = db.scalars(
+        select(VoiceCall)
+        .where(
+            VoiceCall.direction == "outbound",
+            VoiceCall.status == "initiated",
+            VoiceCall.from_did.in_(owned_dids),
+        )
+        .order_by(VoiceCall.created_at.desc())
+        .limit(5)
+    ).all()
+    if not candidates:
+        return None
+
+    callee_variants = _phone_variants(from_value)
+    for call in candidates:
+        if _phone_variants(call.to_number) & callee_variants:
+            return call
+
+    return None