I am planning to create my own HD wallet to support ERC 20 standard token, I am generating the seed using the javascript bitcore-mnemonics plugin. Now I want to generate a private key, public key and address from my generate 12 words mnemonics using javascript. How I can achieve this, I need help?
You can directly query your node, i.e., Parity with parity_newAccountFromPhrase - it accepts seeds like bitcore-mnemonics:
curl --data '{"method":"parity_newAccountFromPhrase","params":["stylus outing overhand dime radial seducing harmless uselessly evasive tastiness eradicate imperfect","hunter2"],"id":1,"jsonrpc":"2.0"}' -H "Content-Type: application/json" -X POST localhost:8545
I give you the answer with curl as you did not specify what exactly you are looking for, but JSONRPC wrappers should be available for all majore programming languages.
Reference.
Related
I'm implementing an application inspecting the ethereum mempool at regular intervals via the geth call txpool_inspect. There I have observed some strange behaviour, for some wallet addresses the transactions seem to go missing at random and then reappear on later queries.
I'm not sure how to create a long-term reproducible example for this, but, as of the time of writing this, the call
curl $MY_ETHEREUM_RPC_URL \
-X POST \
-H "Content-Type: application/json" \
--data '{"method":"txpool_inspect","params":[],"id":1,"jsonrpc":"2.0"}'
will produce a result containing the address + the transactions by nonce for the address 0x8a6bd90abb79ba36266c881561d5d0b1dc528f80 on some calls and on other calls not contain it. Even though the transactions in question have been in the mempool for 3+ days.
Can this behaviour be explained somehow? Is txpool_inspect not expected the return the entire contents of the mempool at all times?
This is probably a stupid question but I'm pretty out of my depth here. I'm trying to utilize an API for my business, and while most of the API has the parameters in the form of "site?param1=one¶m2=two", one of them does not. Instead it's in the form
required parameters -> key
optional parameters
params: a key-value array of where clauses for the query
I would love to be able to put the parameters in directly in the link, but I'm not sure how to parse this or if it's possible.
Example
https://thepetresorts.gingrapp.com/api/v1/animals?key=KEY¶ms=[{animal_id=1},{name=Charlie}]
This is the example they provided using cURL, but I'm really not interested in actually programming with the API, I just need to make specific pulls every once in a while, and I cannot for the life of me figure out how to utilize cURL.
curl "https://{your-subdomain-here}.gingrapp.com/api/v1/animals" \
-H 'Content-Type: application/x-www-form-urlencoded; charset=utf-8' \
--data-urlencode "params[month(from_unixtime(birthday))]=11" \
--data-urlencode "key={your-key-here}"
Any advice would be extremely appreciated!
If you're working with an API, it's even better if you can use POSTMAN or INSOMNIA.
The API your describing has two types of requests, GET and POST - the GET request is usually used to "get to view" but occasionally some use it to also modify and push data - this uses parameters within the URL (what you described), POST however is generally used to push data into the body to make a modification, the parameters are posted within the body of the request instead of in the actual URL like GET requests.
You won't be able to modify the endpoint (unless its your own) you will need to GET where its needed and POST when its needed, the POST request will likely deny a GET request as it's not the intended method - you can create a jump page (your own API) to accept GET parameters and generate a POST request to your API - as #muklis mentioned POSTMAN is great you can create the request in there, generate the code in any language and use that to produce a simple PHP page or so that'll take in $_GET[] variables and pass them into the generated POSTMAN request - it's probably your best bet.
-- Edit
You can also use Zapier, forgot about that - Zapier is amazing for easy code-less integrations; you can use the Webhook zap to receive your parameters in repost them in two easy steps within the zap.
Just another idea for you.
I am working on an online shop using 3dcart, i want to connect the store to an inventory management store called ChannelGrabber. Channel Grabber has provided me with a public and private key with some bits of their API.
$ curl -v -X POST -d "grant_type=client_credentials&client_id=f836e7675c46adbc33d98e32c06dfc6f&client_secret=2f4e72f89bda7f15062a2ba9d107adb5" https://api.orderhub.io/accessToken
> POST /accessToken HTTP/1.1
> User-Agent: curl/7.35.0
> Host: api.orderhub.io
> Accept: */*
> Content-Length: 119
> Content-Type: application/x-www-form-urlencoded
>
< ...response headers...
{
"access_token": "aVSyKhKNPi5XXJqlIMCNfeZwSfvTvasTcWyX2lv2",
"token_type": "Bearer",
"expires_in": 3600
}
$ curl -v -X GET -H "Authorization: Bearer aVSyKhKNPi5XXJqlIMCNfeZwSfvTvasTcWyX2lv2" https://api.orderhub.io/ping
> GET /ping HTTP/1.1
> User-Agent: curl/7.35.0
> Host: api.orderhub.io
> Accept: */*
> Authorization: Bearer aVSyKhKNPi5XXJqlIMCNfeZwSfvTvasTcWyX2lv2
>
< ...response headers...
pong
3d cart have provided the following git project has an example of how to connect up to their clients API. https://github.com/3dcart/REST-API-Client/tree/master/3dCartRestAPIClient.
My issue is that i have basically no idea on how to go about connecting the 2 services up. What language to use other then using Json but i'm not even sure that is possible, I'm only still a student and still quite new to the world of programming so i don't want to have to say i can't do this project and i would quite like to learn how to do this.
Can anyone point me in the right direction?
I was asking myself a similar question some time ago. I am already familiar with basic requesting of rest apis using python. I want to connect the apis of an online sales tool called pipedrive and a tool for generating invoices and bills called billomat. both come with a sophisticated rest api and I know how to get data from them or create new data into them.
If I now create a python script on my local computer I can imagine what I'd have to code to pull eg customer data from pipedrive and create this customers data into billomat. The thing now is that this process is completely manual.
To have the process be completely automatic, I came to the following conclusion:
Use webhooks in pipedrive to send out data when certain events are happening
the data can only be sent to a url which generally should also be a rest api
this url cannot be billomat directly because it wont unterstand or know what to do with the data
thats why I decided to code a litte api myself and host it on my private webserver
this api receives data from pipedrive, processes it, eg maps field names from a customers record to the corresponding field names in billomat, and then sends the prepared data over to billomat in a format that it expects and understands
I know this does not directly answer the OPs question, but would be my suggestion for a fully automatic solution in case you cannot alter the behaviour of at least one of the two apis you'd like to connect.
REST (Representational state transfer) is a way of interfacing your data. The idea is that the action should be defined by the HTTP request method (GET, PUT, POST etc.), while the URL should have no verb/action, just kind of data.
JSON is just the way of communication between server and client. It's like 2 people deciding to speak the same language.
Now, in your client, you can make requests to as many services as you need, and interpret the results. This can be achieved in virtually any programming language. You will find a lot of libraries for both handling HTTP request and parsing JSON responses.
As for the right direction. Pick a programming language you are more familiar with (if it's hard to decide I would recommend python which is fairly easy to start with) and look for libraries for sending HTTP request and parsing json strings.
I admit I'm a greenhorn with web services.
I am attempting to call an OpenAM restful web service from a legacy unprotected tomEE+ servlet. My problem is that I don't understand what I should be creating for the second argument of:
JAXRSClientFactory.create("http://openam.mylocalAMserver.lan:8080/openam/json/authenticate", WhatClassGoesHere.class);
The OpenAM documentation provides this:
3.3.1. Authentication & Logout
$ curl --request POST --header "X-OpenAM-Username: demo" --header
"X-OpenAM-Password: changeit" --header "Content-Type:
application/json" --data "{}"
https://openam.example.com:8443/openam/json/authenticate
{ "tokenId": "AQIC5w...NTcy*", "successUrl": "/openam/console" }
Should I create a class with instance variables "tokenId", "successURL" and passing that as the second parameter to JAXRSClientFactory? Do I need to worry about all of the parameters specified? Once I figure this out, I've got to figure out how to actually pass the user name and password and invoke the service...
Thanks for your help.
This is really more of a JAXRS question, and is not specific to OpenAM. You need to write Java code to make requests and parse the JSON response. JAXRS is one way to do this- but there are others as well.
Look for a good JAXRS tutorial. The OpenAM part is very simple once you understand REST web services.
To begin with I am a novice, both with REST and cURL. This is what I want to do:
I want to query the Twitter Rest API using commandline (some bash script) and hence, I want to use cURL to do that.
I have been trying to search for some tutorial (with no luck) that explains how to use REST with cURL and how to form the headers, get/post and then how to receive the REST response and the response status, so that I can write my logic based on the response status.
I would greatly appreciate if you can give me a few examples on how to call the twitter REST API using curl and also how to access the REST response status.
I tried calling twitter using this:
curl "http://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&screen_name=$user_name&count=150"
And got a json which I was able to use in my program. But I am not sure how to access the rest response status codes (in order to make my implementation more reliable). Also, I am not sure about what other flags should I provide to the cURL while calling it.
PS: Just to add, if you think there is some other MUCH better alternative to retrieving data from REST API other that using cURL, then also please let me know. Though my application is not web based and is more data crunching oriented and that's why I chose commandline and bash.
curl -i will print out the header information:
HTTP/1.1 200 OK
Date: Sat, 29 Dec 2012 07:34:00 GMT
I know it doesn't directly answer your question, but I'd suggest using Python instead of bash, for a number of reasons. And if you decide on that, I strongly recommend the marvellous Requests library: http://docs.python-requests.org