feat: expose inception dts in hab info (#335)

* feat: expose inception dts in hab info

* test: validate dt format

src/keria/app/aiding.py

@@ -13,8 +13,7 @@
 from keri import core
 from keri.app import habbing
 from keri.app.keeping import Algos
-from keri.core import coring, serdering
-from keri.core.coring import Ilks
+from keri.core import coring, serdering, eventing
 from keri.db import dbing
 from keri.help import ogler
 from mnemonic import mnemonic
@@ -1000,6 +999,8 @@ def info(hab, rm, full=False):
     if isinstance(hab, habbing.SignifyGroupHab):
         data["group"]["mhab"] = info(hab.mhab, rm, full)
 
+    data["icp_dt"] = bytes(hab.db.getDts(eventing.dgKey(hab.pre, hab.pre))).decode("utf-8")
+
     if hab.accepted and full:
         kever = hab.kevers[hab.pre]
         data["transferable"] = kever.transferable

tests/app/test_aiding.py

@@ -10,6 +10,7 @@
 import json
 import os
 import pytest
+from datetime import datetime
 
 import falcon
 from falcon import testing
@@ -1624,6 +1625,9 @@ def test_rotation(helpers):
         assert aid["name"] == "aid1"
         assert aid["prefix"] == "EHgwVwQT15OJvilVvW57HE4w0-GPs_Stj2OFoAHZSysY"
 
+        icp_dt = aid["icp_dt"]
+        datetime.fromisoformat(icp_dt)  # will raise an error if the format is not a valid iso dt
+
         serder2, signers2 = helpers.incept(salt, "signify:aid", pidx=1, count=3)
         sigers2 = [signer.sign(ser=serder2.raw, index=0).qb64 for signer in signers2]
 
@@ -1716,6 +1720,11 @@ def test_rotation(helpers):
         assert res.json['done'] is True
 
         res = client.simulate_get(path=f"/identifiers/{aid1['name']}")
+        assert res.status_code == 200
+
+        # Ensure rotation doesn't change dt
+        assert res.json["icp_dt"] == icp_dt
+
         mhab = res.json
         agent0 = mhab["state"]