diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 203e76b9f2..3481477731 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -15,6 +15,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
+import random
from http import HTTPStatus
from synapse.api.constants import LoginType
@@ -109,6 +110,9 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
if self.config.request_token_inhibit_3pid_errors:
# Make the client think the operation succeeded. See the rationale in the
# comments for request_token_inhibit_3pid_errors.
+ # Also wait for some random amount of time between 100ms and 1s to make it
+ # look like we did something.
+ await self.hs.clock.sleep(random.randint(1, 10) / 10)
return 200, {"sid": random_string(16)}
raise SynapseError(400, "Email not found", Codes.THREEPID_NOT_FOUND)
@@ -448,6 +452,9 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
if self.config.request_token_inhibit_3pid_errors:
# Make the client think the operation succeeded. See the rationale in the
# comments for request_token_inhibit_3pid_errors.
+ # Also wait for some random amount of time between 100ms and 1s to make it
+ # look like we did something.
+ await self.hs.clock.sleep(random.randint(1, 10) / 10)
return 200, {"sid": random_string(16)}
raise SynapseError(400, "Email is already in use", Codes.THREEPID_IN_USE)
@@ -516,6 +523,9 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
if self.hs.config.request_token_inhibit_3pid_errors:
# Make the client think the operation succeeded. See the rationale in the
# comments for request_token_inhibit_3pid_errors.
+ # Also wait for some random amount of time between 100ms and 1s to make it
+ # look like we did something.
+ await self.hs.clock.sleep(random.randint(1, 10) / 10)
return 200, {"sid": random_string(16)}
raise SynapseError(400, "MSISDN is already in use", Codes.THREEPID_IN_USE)
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index be0e680ac5..51372cdb5e 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -16,6 +16,7 @@
import hmac
import logging
+import random
from typing import List, Union
import synapse
@@ -131,6 +132,9 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
if self.hs.config.request_token_inhibit_3pid_errors:
# Make the client think the operation succeeded. See the rationale in the
# comments for request_token_inhibit_3pid_errors.
+ # Also wait for some random amount of time between 100ms and 1s to make it
+ # look like we did something.
+ await self.hs.clock.sleep(random.randint(1, 10) / 10)
return 200, {"sid": random_string(16)}
raise SynapseError(400, "Email is already in use", Codes.THREEPID_IN_USE)
@@ -203,6 +207,9 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
if self.hs.config.request_token_inhibit_3pid_errors:
# Make the client think the operation succeeded. See the rationale in the
# comments for request_token_inhibit_3pid_errors.
+ # Also wait for some random amount of time between 100ms and 1s to make it
+ # look like we did something.
+ await self.hs.clock.sleep(random.randint(1, 10) / 10)
return 200, {"sid": random_string(16)}
raise SynapseError(
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