fixing the decrypted tags thing

This commit is contained in:
Believethehype 2023-11-27 10:35:58 +01:00
parent 08137790d4
commit 248963ce90
9 changed files with 87 additions and 101 deletions

12
bot.py
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@ -136,15 +136,16 @@ class Bot:
bid_tag = Tag.parse(['bid', bid, bid]) bid_tag = Tag.parse(['bid', bid, bid])
relays_tag = Tag.parse(["relays", json.dumps(self.dvm_config.RELAY_LIST)]) relays_tag = Tag.parse(["relays", json.dumps(self.dvm_config.RELAY_LIST)])
alt_tag = Tag.parse(["alt", self.dvm_config.SUPPORTED_DVMS[index].TASK]) alt_tag = Tag.parse(["alt", self.dvm_config.SUPPORTED_DVMS[index].TASK])
p_tag = Tag.parse(['p', dvm_keys.public_key().to_hex()])
encrypted_params_string = json.dumps([i_tag.as_vec(), bid_tag.as_vec(), encrypted_params_string = json.dumps([i_tag.as_vec(), bid_tag.as_vec(),
relays_tag.as_vec(), alt_tag.as_vec()]) relays_tag.as_vec(), alt_tag.as_vec(), p_tag.as_vec()])
print(encrypted_params_string) print(encrypted_params_string)
encrypted_params = nip04_encrypt(self.keys.secret_key(), dvm_keys.public_key(), encrypted_params = nip04_encrypt(self.keys.secret_key(), dvm_keys.public_key(),
encrypted_params_string) encrypted_params_string)
p_tag = Tag.parse(['p', dvm_keys.public_key().to_hex()])
encrypted_tag = Tag.parse(['encrypted']) encrypted_tag = Tag.parse(['encrypted'])
nip90request = EventBuilder(self.dvm_config.SUPPORTED_DVMS[index].KIND, encrypted_params, nip90request = EventBuilder(self.dvm_config.SUPPORTED_DVMS[index].KIND, encrypted_params,
[p_tag, encrypted_tag]).to_event(self.keys) [p_tag, encrypted_tag]).to_event(self.keys)
@ -220,14 +221,14 @@ class Bot:
elif status == "payment-required" or status == "partial": elif status == "payment-required" or status == "partial":
amount = 0 amount = 0
for tag in nostr_event.tags(): for tag in nostr_event.tags():
if tag.as_vec()[0] == "amount": if tag.as_vec()[0] == "amount":
amount_msats = int(tag.as_vec()[1]) amount_msats = int(tag.as_vec()[1])
amount = int(amount_msats / 1000) amount = int(amount_msats / 1000)
entry = next((x for x in self.job_list if x['event_id'] == etag), None) entry = next((x for x in self.job_list if x['event_id'] == etag), None)
if entry is not None and entry['is_paid'] is False and entry['dvm_key'] == ptag: if entry is not None and entry['is_paid'] is False and entry['dvm_key'] == ptag:
print("PAYMENT: " + nostr_event.as_json())
#if we get a bolt11, we pay and move on #if we get a bolt11, we pay and move on
if len(tag.as_vec()) > 2: if len(tag.as_vec()) > 2:
bolt11 = tag.as_vec()[2] bolt11 = tag.as_vec()[2]
@ -236,7 +237,8 @@ class Bot:
else: else:
user = get_or_add_user(db=self.dvm_config.DB, npub=nostr_event.pubkey().to_hex(), user = get_or_add_user(db=self.dvm_config.DB, npub=nostr_event.pubkey().to_hex(),
client=self.client, config=self.dvm_config) client=self.client, config=self.dvm_config)
bolt11 = zap(user.lud16, amount, "Zap", nostr_event, self.keys, self.dvm_config, "private") print("PAYING: " + user.name)
bolt11 = zap(user.lud16, amount, "Zap", nostr_event, self.keys, self.dvm_config, "public")
if bolt11 == None: if bolt11 == None:
print("Receiver has no Lightning address") print("Receiver has no Lightning address")
return return

49
dvm.py
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@ -83,24 +83,24 @@ class DVM:
return return
def handle_nip90_job_event(nip90_event): def handle_nip90_job_event(nip90_event):
"""
:type nip90_event: Event
"""
tags: typing.List[Tag] nip90_event = check_and_decrypt_tags(nip90_event, self.dvm_config)
tags, p_tag_str = check_and_decrypt_tags(nip90_event, self.dvm_config) if nip90_event is None:
if p_tag_str is None:
return return
nip90_event.tags = tags
cashu = ""
for tag in tags:
if tag.as_vec()[0] == "cashu":
cashu = tag.as_vec()[0]
user = get_or_add_user(self.dvm_config.DB, nip90_event.pubkey().to_hex(), client=self.client, user = get_or_add_user(self.dvm_config.DB, nip90_event.pubkey().to_hex(), client=self.client,
config=self.dvm_config) config=self.dvm_config)
task_supported, task, duration = check_task_is_supported(nip90_event, tags, client=self.client,
cashu = ""
p_tag_str = ""
for tag in nip90_event.tags():
if tag.as_vec()[0] == "cashu":
cashu = tag.as_vec()[0]
elif tag.as_vec()[0] == "p":
p_tag_str = tag.as_vec()[0]
task_supported, task, duration = check_task_is_supported(nip90_event, client=self.client,
get_duration=(not user.iswhitelisted), get_duration=(not user.iswhitelisted),
config=self.dvm_config) config=self.dvm_config)
@ -134,6 +134,7 @@ class DVM:
do_work(nip90_event) do_work(nip90_event)
# if task is directed to us via p tag and user has balance, do the job and update balance # if task is directed to us via p tag and user has balance, do the job and update balance
elif p_tag_str == Keys.from_sk_str( elif p_tag_str == Keys.from_sk_str(
self.dvm_config.PRIVATE_KEY).public_key().to_hex() and user.balance >= amount: self.dvm_config.PRIVATE_KEY).public_key().to_hex() and user.balance >= amount:
balance = max(user.balance - amount, 0) balance = max(user.balance - amount, 0)
@ -155,7 +156,7 @@ class DVM:
# else send a payment required event to user # else send a payment required event to user
else: else:
bid = 0 bid = 0
for tag in nip90_event.tags: for tag in nip90_event.tags():
if tag.as_vec()[0] == 'bid': if tag.as_vec()[0] == 'bid':
bid = int(tag.as_vec()[1]) bid = int(tag.as_vec()[1])
@ -177,14 +178,15 @@ class DVM:
False, amount, client=self.client, dvm_config=self.dvm_config) False, amount, client=self.client, dvm_config=self.dvm_config)
else: else:
print("Task not supported on this DVM, skipping..") print("[" + self.dvm_config.NIP89.name + "] Task " + task + " not supported on this DVM, skipping..")
def handle_zap(zap_event): def handle_zap(zap_event):
try: try:
invoice_amount, zapped_event, sender, message, anon = parse_zap_event_tags(zap_event, invoice_amount, zapped_event, sender, message, anon = parse_zap_event_tags(zap_event,
self.keys, self.dvm_config.NIP89.name, self.keys,
self.client, self.dvm_config) self.dvm_config.NIP89.name,
self.client, self.dvm_config)
user = get_or_add_user(db=self.dvm_config.DB, npub=sender, client=self.client, config=self.dvm_config) user = get_or_add_user(db=self.dvm_config.DB, npub=sender, client=self.client, config=self.dvm_config)
if zapped_event is not None: if zapped_event is not None:
@ -198,16 +200,17 @@ class DVM:
amount = int(float(tag.as_vec()[1]) / 1000) amount = int(float(tag.as_vec()[1]) / 1000)
elif tag.as_vec()[0] == 'e': elif tag.as_vec()[0] == 'e':
job_event = get_event_by_id(tag.as_vec()[1], client=self.client, config=self.dvm_config) job_event = get_event_by_id(tag.as_vec()[1], client=self.client, config=self.dvm_config)
tags: typing.List[Tag] if job_event is not None:
tags, p_tag_str = check_and_decrypt_tags(job_event, self.dvm_config) job_event = check_and_decrypt_tags(job_event, self.dvm_config)
job_event.tags = tags else:
return
if p_tag_str is None: if p_tag_str is None:
return return
# if a reaction by us got zapped # if a reaction by us got zapped
task_supported, task, duration = check_task_is_supported(job_event, tags, task_supported, task, duration = check_task_is_supported(job_event,
client=self.client, client=self.client,
get_duration=False, get_duration=False,
config=self.dvm_config) config=self.dvm_config)
@ -263,7 +266,7 @@ class DVM:
print("[" + self.dvm_config.NIP89.name + "] Error during content decryption: " + str(e)) print("[" + self.dvm_config.NIP89.name + "] Error during content decryption: " + str(e))
def check_event_has_not_unfinished_job_input(nevent, append, client, dvmconfig): def check_event_has_not_unfinished_job_input(nevent, append, client, dvmconfig):
task_supported, task, duration = check_task_is_supported(nevent, nevent.tags, client, False, task_supported, task, duration = check_task_is_supported(nevent, client, False,
config=dvmconfig) config=dvmconfig)
if not task_supported: if not task_supported:
return False return False
@ -372,7 +375,7 @@ class DVM:
status_tag = Tag.parse(["status", status]) status_tag = Tag.parse(["status", status])
tags = [e_tag, alt_tag, status_tag] tags = [e_tag, alt_tag, status_tag]
for tag in original_event.tags: for tag in original_event.tags():
if tag.as_vec()[0] == "p": if tag.as_vec()[0] == "p":
p_tag = tag p_tag = tag

View File

@ -46,7 +46,7 @@ class ImageGenerationDALLE(DVMTaskInterface):
model = "dall-e-3" model = "dall-e-3"
quality = "standard" quality = "standard"
for tag in event.tags: for tag in event.tags():
if tag.as_vec()[0] == 'i': if tag.as_vec()[0] == 'i':
input_type = tag.as_vec()[2] input_type = tag.as_vec()[2]
if input_type == "text": if input_type == "text":

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@ -55,7 +55,7 @@ class ImageGenerationSDXL(DVMTaskInterface):
lora_weight = "" lora_weight = ""
strength = "" strength = ""
guidance_scale = "" guidance_scale = ""
for tag in event.tags: for tag in event.tags():
if tag.as_vec()[0] == 'i': if tag.as_vec()[0] == 'i':
input_type = tag.as_vec()[2] input_type = tag.as_vec()[2]
if input_type == "text": if input_type == "text":

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@ -43,7 +43,7 @@ class TextExtractionPDF(DVMTaskInterface):
input_content = "" input_content = ""
url = "" url = ""
for tag in event.tags: for tag in event.tags():
if tag.as_vec()[0] == 'i': if tag.as_vec()[0] == 'i':
input_type = tag.as_vec()[2] input_type = tag.as_vec()[2]
input_content = tag.as_vec()[1] input_content = tag.as_vec()[1]

View File

@ -42,7 +42,7 @@ class Translation(DVMTaskInterface):
text = "" text = ""
translation_lang = "en" translation_lang = "en"
for tag in event.tags: for tag in event.tags():
if tag.as_vec()[0] == 'i': if tag.as_vec()[0] == 'i':
input_type = tag.as_vec()[2] input_type = tag.as_vec()[2]

View File

@ -71,6 +71,7 @@ def nostr_client_test_image(prompt):
def nostr_client_test_image_private(prompt, cashutoken): def nostr_client_test_image_private(prompt, cashutoken):
keys = Keys.from_sk_str(os.getenv("NOSTR_TEST_CLIENT_PRIVATE_KEY")) keys = Keys.from_sk_str(os.getenv("NOSTR_TEST_CLIENT_PRIVATE_KEY"))
receiver_keys = Keys.from_sk_str(os.getenv("NOSTR_PRIVATE_KEY"))
# TODO more advanced logic, more parsing, params etc, just very basic test functions for now # TODO more advanced logic, more parsing, params etc, just very basic test functions for now
@ -92,7 +93,7 @@ def nostr_client_test_image_private(prompt, cashutoken):
relays_tag.as_vec(), alt_tag.as_vec(), cashu_tag.as_vec()]) relays_tag.as_vec(), alt_tag.as_vec(), cashu_tag.as_vec()])
encrypted_params = nip04_encrypt(keys.secret_key(), keys.public_key(), encrypted_params = nip04_encrypt(keys.secret_key(), receiver_keys.public_key(),
encrypted_params_string) encrypted_params_string)
p_tag = Tag.parse(['p', keys.public_key().to_hex()]) p_tag = Tag.parse(['p', keys.public_key().to_hex()])
@ -107,31 +108,6 @@ def nostr_client_test_image_private(prompt, cashutoken):
send_event(nip90request, client=client, dvm_config=config) send_event(nip90request, client=client, dvm_config=config)
return nip90request.as_json() return nip90request.as_json()
iTag = Tag.parse(["i", prompt, "text"])
outTag = Tag.parse(["output", "image/png;format=url"])
paramTag1 = Tag.parse(["param", "size", "1024x1024"])
tTag = Tag.parse(["t", "bitcoin"])
bidTag = Tag.parse(['bid', str(1000 * 1000), str(1000 * 1000)])
relaysTag = Tag.parse(['relays', "wss://relay.damus.io", "wss://blastr.f7z.xyz", "wss://relayable.org",
"wss://nostr-pub.wellorder.net"])
alttag = Tag.parse(["alt", "This is a NIP90 DVM AI task to translate a given Input"])
event = EventBuilder(EventDefinitions.KIND_NIP90_GENERATE_IMAGE, str("Generate an Image."),
[iTag, outTag, tTag, paramTag1, bidTag, relaysTag, alttag]).to_event(keys)
relay_list = ["wss://relay.damus.io", "wss://blastr.f7z.xyz", "wss://relayable.org",
"wss://nostr-pub.wellorder.net"]
client = Client(keys)
for relay in relay_list:
client.add_relay(relay)
client.connect()
config = DVMConfig
send_event(event, client=client, dvm_config=config)
return event.as_json()
def nostr_client(): def nostr_client():
keys = Keys.from_sk_str(os.getenv("NOSTR_TEST_CLIENT_PRIVATE_KEY")) keys = Keys.from_sk_str(os.getenv("NOSTR_TEST_CLIENT_PRIVATE_KEY"))
sk = keys.secret_key() sk = keys.secret_key()
@ -156,8 +132,8 @@ def nostr_client():
nostr_client_test_image("a beautiful purple ostrich watching the sunset") nostr_client_test_image("a beautiful purple ostrich watching the sunset")
cashutoken = "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" = # cashutoken = "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"
nostr_client_test_image_private("a beautiful ostrich watching the sunset", cashutoken ) #nostr_client_test_image_private("a beautiful ostrich watching the sunset", cashutoken )
class NotificationHandler(HandleNotification): class NotificationHandler(HandleNotification):
def handle(self, relay_url, event): def handle(self, relay_url, event):
print(f"Received new event from {relay_url}: {event.as_json()}") print(f"Received new event from {relay_url}: {event.as_json()}")

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@ -1,4 +1,8 @@
import typing
import requests import requests
from nostr_sdk import Event, Tag
from utils.definitions import EventDefinitions from utils.definitions import EventDefinitions
from utils.nostr_utils import get_event_by_id from utils.nostr_utils import get_event_by_id
@ -50,17 +54,16 @@ def get_task(event, client, dvmconfig):
return "unknown type" return "unknown type"
def check_task_is_supported(event, tags, client, get_duration=False, config=None): def check_task_is_supported(event: Event, client, get_duration=False, config=None):
try: try:
dvm_config = config dvm_config = config
input_value = "" input_value = ""
input_type = "" input_type = ""
duration = 1 duration = 1
task = get_task(event, client=client, dvmconfig=dvm_config) task = get_task(event, client=client, dvmconfig=dvm_config)
try: try:
for tag in tags: for tag in event.tags():
if tag.as_vec()[0] == 'i': if tag.as_vec()[0] == 'i':
if len(tag.as_vec()) < 3: if len(tag.as_vec()) < 3:
print("Job Event missing/malformed i tag, skipping..") print("Job Event missing/malformed i tag, skipping..")
@ -75,7 +78,7 @@ def check_task_is_supported(event, tags, client, get_duration=False, config=None
return False, "", 0 return False, "", 0
elif input_type == 'url' and check_url_is_readable(input_value) is None: elif input_type == 'url' and check_url_is_readable(input_value) is None:
print("Url not readable / supported") print("Url not readable / supported")
return False, task, duration# return False, task, duration #
elif tag.as_vec()[0] == 'output': elif tag.as_vec()[0] == 'output':
# TODO move this to individual modules # TODO move this to individual modules
@ -85,13 +88,13 @@ def check_task_is_supported(event, tags, client, get_duration=False, config=None
or output == "image/png" or "image/jpg" or output == "image/png" or "image/jpg"
or output == "image/png;format=url" or output == "image/jpg;format=url" or output == "image/png;format=url" or output == "image/jpg;format=url"
or output == ""): or output == ""):
print("Output format not supported, skipping..") print("Output format not supported, skipping..")
return False, "", 0 return False, "", 0
except Exception as e: except Exception as e:
print("Check task 2: " + str(e)) print("Check task 2: " + str(e))
for dvm in dvm_config.SUPPORTED_DVMS: for dvm in dvm_config.SUPPORTED_DVMS:
print(dvm.TASK)
if dvm.TASK == task: if dvm.TASK == task:
if not dvm.is_input_supported(input_type, event.content()): if not dvm.is_input_supported(input_type, event.content()):
return False, task, duration return False, task, duration
@ -130,10 +133,11 @@ def check_url_is_readable(url):
def get_amount_per_task(task, dvm_config, duration=1): def get_amount_per_task(task, dvm_config, duration=1):
for dvm in dvm_config.SUPPORTED_DVMS: #this is currently just one for dvm in dvm_config.SUPPORTED_DVMS: # this is currently just one
if dvm.TASK == task: if dvm.TASK == task:
amount = dvm.COST * duration amount = dvm.COST * duration
return amount return amount
else: else:
print("["+dvm_config.SUPPORTED_DVMS[0].NAME +"] Task " + task + " is currently not supported by this instance, skipping") print("[" + dvm_config.SUPPORTED_DVMS[
0].NAME + "] Task " + task + " is currently not supported by this instance, skipping")
return None return None

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@ -1,6 +1,7 @@
import json import json
import typing
from datetime import timedelta from datetime import timedelta
from nostr_sdk import Filter, Client, Alphabet, EventId, Event, PublicKey, Tag, Keys, nip04_decrypt from nostr_sdk import Filter, Client, Alphabet, EventId, Event, PublicKey, Tag, Keys, nip04_decrypt, EventBuilder
def get_event_by_id(event_id: str, client: Client, config=None) -> Event | None: def get_event_by_id(event_id: str, client: Client, config=None) -> Event | None:
@ -61,38 +62,38 @@ def send_event(event: Event, client: Client, dvm_config) -> EventId:
def check_and_decrypt_tags(event, dvm_config): def check_and_decrypt_tags(event, dvm_config):
tags = [] try:
is_encrypted = False tags = []
p = "" is_encrypted = False
for tag in event.tags(): p = ""
if tag.as_vec()[0] == 'encrypted': sender = event.pubkey()
is_encrypted = True for tag in event.tags():
elif tag.as_vec()[0] == 'p': if tag.as_vec()[0] == 'encrypted':
p = tag.as_vec()[1] is_encrypted = True
elif tag.as_vec()[0] == 'p':
p = tag.as_vec()[1]
if is_encrypted: if is_encrypted:
if p != Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex(): if p != Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex():
print("[" + dvm_config.NIP89.name + "] Task encrypted and not addressed to this DVM, " print("[" + dvm_config.NIP89.name + "] Task encrypted and not addressed to this DVM, "
"skipping..") "skipping..")
return None, None return None
elif p == Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex(): elif p == Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex():
encrypted_tag = Tag.parse(["encrypted"]) print("encrypted")
p_tag = Tag.parse(["p", p]) #encrypted_tag = Tag.parse(["encrypted"])
#p_tag = Tag.parse(["p", p])
tags_str = nip04_decrypt(Keys.from_sk_str(dvm_config.PRIVATE_KEY).secret_key(), tags_str = nip04_decrypt(Keys.from_sk_str(dvm_config.PRIVATE_KEY).secret_key(),
event.pubkey(), event.content()) event.pubkey(), event.content())
params = json.loads(tags_str) #TODO add outer p tag so it doesnt have to be sent twice
params = json.loads(tags_str)
for element in params: eventasjson = json.loads(event.as_json())
tags.append(Tag.parse(element)) eventasjson['tags'] = params
eventasjson['content'] = ""
# Keep the encrypted tag event = Event.from_json(json.dumps(eventasjson))
tags.append(p_tag) print(event.as_json())
tags.append(encrypted_tag) except Exception as e:
print(e)
return tags, p
else:
return event.tags, p
return event