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# "ack"nowledge the ping from Discord
return {"type": DiscordResponseType.PONG.value}
if data.get("type") == DiscordInteractionType.APPLICATION_COMMAND.value:
# this is a command interaction
app_id = data["application_id"]
interaction_token = data["token"]
user_id = data["member"]["user"]["id"]
question = data["data"]["options"][0]["value"]
pretty_log(question)
# kick off our actual response in the background
respond.spawn(
question,
app_id,
interaction_token,
user_id,
)
# and respond immediately to let Discord know we're on the case
return {
"type": DiscordResponseType.DEFERRED_CHANNEL_MESSAGE_WITH_SOURCE.value
}
raise HTTPException(status_code=400, detail="Bad request")
return app
@stub.function()
async def respond(
question: str,
application_id: str,
interaction_token: str,
user_id: str,
):
"""Respond to a user's question by passing it to the language model."""
import modal
try:
raw_response = await modal.Function.lookup(
"askfsdl-backend", "qanda"
).remote.aio(question, request_id=interaction_token, with_logging=True)
pretty_log(raw_response)
response = construct_response(raw_response, user_id, question)
except Exception as e:
pretty_log("Error", e)
response = construct_error_message(user_id)
await send_response(response, application_id, interaction_token)
async def send_response(
response: str,
application_id: str,
interaction_token: str,
):
"""Send a response to the user interaction."""
interaction_url = (
f"https://discord.com/api/v10/webhooks/{application_id}/{interaction_token}"
)
json_payload = {"content": f"{response}"}
payload = aiohttp.FormData()
payload.add_field(
"payload_json", json.dumps(json_payload), content_type="application/json"
)
async with aiohttp.ClientSession() as session:
async with session.post(interaction_url, data=payload) as resp:
await resp.text()
async def verify(request: Request):
"""Verify that the request is from Discord."""
from nacl.signing import VerifyKey
from nacl.exceptions import BadSignatureError
public_key = os.getenv("DISCORD_PUBLIC_KEY")
verify_key = VerifyKey(bytes.fromhex(public_key))
signature = request.headers.get("X-Signature-Ed25519")
timestamp = request.headers.get("X-Signature-Timestamp")
body = await request.body()
message = timestamp.encode() + body
try:
verify_key.verify(message, bytes.fromhex(signature))
except BadSignatureError:
# IMPORTANT: if you let bad signatures through,
# Discord will refuse to talk to you
raise HTTPException(status_code=401, detail="Invalid request") from None
return body