1 files changed, 78 insertions, 2 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/api/users.py b/packages/meshbay-hub/src/meshbay_hub/api/users.py
index af9141c..b7b402f 100644
--- a/packages/meshbay-hub/src/meshbay_hub/api/users.py
+++ b/packages/meshbay-hub/src/meshbay_hub/api/users.py
@@ -1,12 +1,13 @@
 """User endpoints — /v1/users/*"""
 
 import base64
+import logging
 import uuid
 from datetime import datetime, timezone, timedelta
 
 from fastapi import APIRouter, Depends, HTTPException, Request, status
 from pydantic import BaseModel, field_validator
-from sqlalchemy import select
+from sqlalchemy import delete, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from meshbay_hub.auth import (
@@ -25,9 +26,13 @@ from meshbay_hub.api.middleware import limiter
 from meshbay_hub.api.netutil import client_ip
 from meshbay_hub.config import HubConfig
 from meshbay_hub.db.engine import get_db
-from meshbay_hub.db.models import GroupMember, IPLog, RefreshToken, User
+from meshbay_hub.db.models import (
+    Group, GroupMember, IPLog, Node, Notification, RefreshToken, User,
+)
 from meshbay_hub.api.deps import get_current_user, require_user_scope
 
+log = logging.getLogger(__name__)
+
 router = APIRouter(prefix="/v1/users", tags=["users"])
 
 _cfg: HubConfig | None = None
@@ -324,6 +329,77 @@ async def register_node_key(
 # call that silently changes what every node believes about someone.
 
 
+# ── Account deletion ─────────────────────────────────────────────────────────
+
+async def erase_account(db: AsyncSession, user: User) -> dict:
+    """
+    Erase an account, keeping only what the law asked us to keep.
+
+    Gone: credentials, email, node key, group memberships, notifications, refresh
+    tokens, node registrations. The username is released.
+
+    Kept: the row itself, emptied, and the IP log that points at it. Those logs
+    exist for one year to answer legal requests, and a log that cannot say whose
+    connection it recorded does not do that — detaching them would keep the data
+    and lose the only thing it is for. So the account becomes a tombstone rather
+    than a hole in the table.
+
+    Not touched, because the hub cannot: files this person uploaded to nodes, and
+    the identity keys nodes pinned for them. Those live on machines the hub does
+    not command, and only their operators can remove them.
+    """
+    owned = (await db.execute(
+        select(Group).where(Group.admin_id == user.id))).scalars().all()
+    if owned:
+        raise HTTPException(
+            status_code=409,
+            detail=("This account still owns groups: "
+                    + ", ".join(g.name for g in owned)
+                    + ". Delete them or hand them over first — deleting the "
+                      "account would strand their members."),
+        )
+
+    await db.execute(delete(GroupMember).where(GroupMember.user_id == user.id))
+    await db.execute(delete(Notification).where(Notification.user_id == user.id))
+    await db.execute(delete(RefreshToken).where(RefreshToken.user_id == user.id))
+    await db.execute(delete(Node).where(Node.user_id == user.id))
+
+    username = user.username
+    user.username = f"deleted-{user.id[:8]}"
+    user.email = ""
+    user.pw_hash = b""
+    user.pw_salt = b""
+    user.pk_node_ed25519 = None
+    user.status = "deleted"
+    user.role = "user"
+    await db.commit()
+    log.info("Account erased: %s (%s)", username, user.id[:8])
+    return {"status": "deleted", "username": username}
+
+
+class DeleteAccountRequest(BaseModel):
+    auth_key: str
+
+
+@router.delete("/me")
+async def delete_own_account(
+    body: DeleteAccountRequest,
+    current_user: User = Depends(require_user_scope),
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    Erase your own account. The passphrase is re-checked here.
+
+    A live access token is not enough for something irreversible: it may be a
+    borrowed laptop or a session left open. Same value as at sign-in, so the hub
+    still never sees the passphrase itself.
+    """
+    if not verify_password(body.auth_key, current_user.pw_hash, current_user.pw_salt,
+                           current_user.pw_version):
+        raise HTTPException(status_code=403, detail="Passphrase does not match")
+    return await erase_account(db, current_user)
+
+
 @router.get("/{username}/pubkeys")
 async def get_user_pubkeys(
     username: str,