I am trying to code a client for swapping tokens through BSC chain (I really don't want to use web3 libraries) using Ethereum API. So learned some stuff from Ethereum RPC API documentation, but i can't really understand what are the steps for sending Raw Signed transaction. So here is my example payload:
data = {"jsonrpc": "2.0",
"method": "eth_sendTransaction",
"params": [
{
'from': address,
'to': self.router_address,
'gas': hex(gas),
'gasPrice': hex(gasPrice),
'value': hex(ETH_amount),
'data': query,
"nonce": await self.getTransactionCount(address)
}],
"id": _id}
And of course necessary header {"Content-Type": "application/json"}
The data field (query variable) basically was taken from this transaction. If you scroll down, you can see the original payload, which of course was successfully processed, because the operation was created with PancakeSwap. But when i send the same (even with modified deadline parameter) i get the this:
{'jsonrpc': '2.0', 'id': 1, 'error': {'code': -32000, 'message': 'unknown account'}}
Obvioulsy somewhere should be done signing function, but i just don't know how to make it. Can somebody help me? How do I process the data and make requests so that the swap succeeds? (From BNB to BUSD, for example - without approving step).
Related
So I know there's several SDK packages for many languages available for nHost, however I need to create my own interface to the system since the language I'll be using isn't typical.
I basically just need to know how to interact with authentication endpoints, send a users un/pw and recieve a JWT token. I've been successfully able to do this with aws Cognito, but I'd like to explore this instead.
I'm also not sure if I'm using the right base url, here's my thought so far:
https://kbvlufgpikkxbfkzkbeg.nhost.run/auth/login
So I would POST to there with some json in the body with the un/pw stuff, and the response should be the jwt token right?
I get a "resource does not exist" response from the above, however, so obviously I'm not forming the url correctly in the first place.
Thanks for the help!
Nhost supports multiple sign-on methods.
For example, using the email+password method, you would send:
POST https://xxxxxxxxxxxxx.nhost.run/v1/auth/signin/email-password
{"email":"foo#example.com","password":"bar"}
and the response:
{
"session": {
"accessToken": "somejwt....",
"accessTokenExpiresIn": 900,
"refreshToken": "xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
"user": {
"id": "xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
"createdAt": "2022-09-17T19:13:15.440221+00:00",
"displayName": "foo#example.com",
"avatarUrl": "",
"locale": "en",
"email": "foo#example.com",
"isAnonymous": false,
"defaultRole": "user",
"metadata": {},
"emailVerified": true,
"phoneNumber": null,
"phoneNumberVerified": false,
"activeMfaType": null,
"roles": [
"user",
"me"
]
}
},
"mfa": null
}
The JWT is short-term, when it expires, the refresh token is used to get a new one.
The Nhost JavaScript SDK handles it automatically for you, that's a big benefit to the platform (in addition to being integrated with Hasura). If you are trying to port it to another unsupported language, you'd have to reimplement it. Probably by reading the library and/or running one of their sample client application and reverse-engineering the HTTP over the wire.
The question is about kucoin websocket public channel (not trades) just last trades
I just want a live feed of trades like other crypto exchanges...
but when I want to connect to "wss://ws-api-futures.kucoin.com/endpoint" I get WebSocketError: Received unexpected status code (401 Unauthorized)
the documentation https://docs.kucoin.com/futures/#create-connection lack explications :(
normally with other exchanges I can just do this in javascript
bybit_market_ws = new WebSocket("wss://stream.bybit.com/spot/quote/ws/v2");
bybit_market_ws.onmessage = event => bybit_trades(event.data);
bybit_market_ws.onopen = event => bybit_market_ws.send(JSON.stringify({"topic":"trade","params":{"symbol":"BTCUSDT","binary":false},"event":"sub"}));
function bybit_trades (jsonx) { console.log(JSON.parse(jsonx)); }
so how can I do that with kucoin websocket ?
according to the documentation i would need a "public token"...
but there is no explication on how to get that token :(
does someone knows how I would retrieve the last trades via websocket (public) channel ?
Note that the following steps may be changed when the API is updated.
All information can be found at https://docs.kucoin.com/#apply-connect-token
Get the public token
Send a empty http POST (GET will not work) message to https://api.kucoin.com/api/v1/bullet-public.
Response:
{
"code": "200000",
"data": {
"token": "2neAiuYvAU61ZD...",
"instanceServers": [
{
"endpoint": "wss://ws-api.kucoin.com/endpoint",
"encrypt": true,
"protocol": "websocket",
"pingInterval": 18000,
"pingTimeout": 10000
}
]
}
}
Connect to the Websocket
With the data of the repsonse above:
websocket: endpoint + "?token=" + token
Example: wss://ws-api.kucoin.com/endpoint?token=2neAiu....
Get all supported trading pairs
send a http GET message to https://api.kucoin.com/api/v1/symbols
{
"code": "200000",
"data": [
{
"symbol": "REQ-ETH",
"name": "REQ-ETH",
"baseCurrency": "REQ",
"quoteCurrency": "ETH",
...
},
{
"symbol": "BTC-USDC",
"name": "BTC-USDC",
"baseCurrency": "BTC",
"quoteCurrency": "USDC",
...
},
...
Get trading data
When the websocket connection is established send a http POST message:
{
"type": "subscribe", //subscribe or unsubscribe
"topic": "/market/ticker:BTC-USDT,BTC-USDC"
}
maybe this answer will not please you at all, but i will try, most of the people who work from the API in KuCoin do it with python, in fact the SDK for Nodejs is out of date, your best bet is to ask in the telegram channel https://t.me/KuCoin_API, there are KuCoin engineers who always help, although most of them use python, there is also the academy channel https://t.me/kucoin_learning, where there are examples, in short I can only mention references because I was also where you are, and the best I could do was that and review the SDk code and from there intuit and create my own adjustments
PD: the datafeed.js file is your best option, check it out https://github.com/Kucoin/kucoin-futures-node-sdk/blob/master/src/lib/datafeed.js
I am looking at getting Cherwell talking to Zabbix but stumbling at what I understand is the easiest starting point. I have a user setup in Cherwell as part of the webservice which I have confirmed I can log into Zabbix with.
As part of the web call I am performing the basic Zabbix version check.
{
"jsonrpc": "2.0",
"method": "apiinfo.version",
"params": {},
"id": 1
}
I am getting a -32600 error, Invalid Request, data: the received JSON is not a valid JSON-RPC request.
From what I have read you should be able to do this even if you are not authenticated.
I am though getting back a result code of 200 which means the connection is solid but just not returning what I am expecting.
Thanks
That error usually means the double quotes are missing, missplaced, or escaped in a wrong way. The code by itself is fine.
#API_URL=https://.../zabbix/api_jsonrpc.php
#CONTENT_TYPE=Content-Type: application/json-rpc
{
"jsonrpc": "2.0",
"method": "apiinfo.version",
"id": 1,
"params": {}
}
I have an Express app which supports Google authentication and authorization via passport. I have begun integrating it with Google Assistant and things were going quite well but I am having trouble with the account linking as described at https://developers.google.com/actions/identity/google-sign-in#start_the_authentication_flow
Using the method in the docs at https://codelabs.developers.google.com/codelabs/actions-2/#4 I was able to get user details but when I try to modify to support
app.intent('Start Signin', conv => {
conv.ask(new SignIn('To get your account details'))
})
and
app.intent('Get Signin', (conv, params, signin) => { ...}
the dialogflow always falls back to my default fallback intent and I get an error in Express console
Error: Dialogflow IntentHandler not found for intent: Default Fallback Intent
My dialogflow intent is set to use webhook and other intents work fine (until I add these sign-in intents!)
Reading this thread Dialogflow IntentHandler not found for intent: myIntent (Dialogflow V2) it was suggested that the intent name rather than the action name is used so I check my Actions on Google simulator and the request contains:
"inputs": [
{
"intent": "actions.intent.SIGN_IN",
"rawInputs": [
{
"inputType": "KEYBOARD"
}
],
"arguments": [
{
"name": "SIGN_IN",
"extension": {
"#type": "type.googleapis.com/google.actions.v2.SignInValue",
"status": "OK"
}
}
]
}
],
so I tried updating my Dialogflow intent name to actions.intent.SIGN_IN and modifying the intent name in my Express app accordingly but it doesn't make any difference.
The simulator response includes:
"responseMetadata": {
"status": {
"code": 14,
"message": "Webhook error (206)"
},
but I'm not sure if that is just because for some reason the intent names are not matching up. Any help much appreciated!
As you speculate in the comments, the issue is that your "Get Signin" Intent isn't registered to get the event indicating that the user has signed in (or failed to). Since there is no such Intent setup, it ends up calling the Fallback Intent, which apparently doesn't have an Intent Handler registered in your webhook.
To make your "Get Signin" Intent get the sign-in event, set the "Event" field to actions_intent_SIGN_IN. (Note the similarity to the Intent name you saw in the simulator, but using underscores instead of dots.)
As an aside, the simulator was showing you what the communication between the Assistant and Dialogflow looks like, so it can be somewhat confusing to understand what Dialogflow is doing with it. It didn't have anything to do with the name of your Intent or anything else.
Finally, it often isn't necessary to do this check. You will know if the user is signed in because either the auth token has been set or the id token has been set (depending on your method of Account Linking).
This behavior started today (11/10/2015).
When I make a call to sandboxed Uber endpoint a real driver accept and comes.
I've spent 5 hours trying to understand what is happening.
I've been using Uber API for last 1.5 months and haven't had this issue before.
I make this request (now I do it with Postman, so seems like there is nothing else can affect it):
URL: https://sandbox-api.uber.com/v1/requests
Method: POST
Headers:
Authorization Bearer AvwkOYENiYRS... (Got it from Uber)
Content-Type: application/json
body:
{
"product_id": "04a497f5-380d-47f2-bf1b-ad4cfdcb51f2", // got from uber before that
"start_latitude":37.4237323,
"start_longitude":-122.09827279999999,
"end_latitude":37.4243272,
"end_longitude":-122.09491579999997
}
I receive successful response from Uber.
And after some time server start receiving events from Uber:
X-Environment: production
{
...
"event_type": "requests.status_changed",
"meta": {
"resource_id": "...", // resource_id that I get when requested sandboxed api
"status": "accepted" // and then arriving, etc
},
...
}
This was a bug on Uber's side. This was resolved this morning. Let us know if you still see the issue.