I deployed a tron node for myself using this guide: tron node.I was also able to connect to its http api. Question: How can I create and make transactions to usdt addresses using the http api? I understand how it's divided for a regular cryptocurrency, but usdt is a token, so it's a bit more complicated?
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I have taken a look around the internet and all the solutions emphasize using Express and Node Js API in place to able to send an email. I would love to see any suggestions on how to best go about it because I don't have a backend in place. Thank you.
You're going to need some sort of backend otherwise the API-Key will be exposed.
From the SendGrid documentation:
When you have a browser-only application that reaches out to APIs, the API key has to be embedded in the application. Anyone with access to a browser-only application can access all of the Javascript source code, including your API keys.
Making your API key publicly accessible could result in anyone authenticating API calls with your API key — this is a significant security concern both for you and SendGrid.
You could use a serverless AWS lambda function or google function which would be a "backend" but without having to support the infrastructure / use a big framework.
I'd like to send requests against the Google Directions API. Google provides a Node.JS client library for the API. However, this AP is server-side only. Attempting to use it from a browser script results in a CORS failure. Multiple past answers (such as this one) indicate that this library simply can't be used in this way.
The alternative is to use the client-side JavaScript API. However, this requires adding a <script> tag to the document root. That's the wrong level of abstraction for my needs. I'd like to use a method from a library or dot-js file instead.
Following the advice given here, I'd like to ask: is there a module available through npm I can use to query the Google Directions API client-side?
It's not naively possible to access the Google Maps Directions API from the client side. Web browsers implement the Single-Origin Policy, which requires that any requests to a domain come from the same domain. Requires between domains are disallowed by default. Cross-domain requests can be enabled at the server lever by setting the right CORS headers on the endpoint, but the Google Maps servers choose not to do this.
There are two ways of working around this. One is to wrap the request using the Google API Auth library. However, I could not get this to work.
What did work was using a reverse proxy. This workaround is actually mentioned in the Google Directions API intro page (albeit obliquely). You will need to set up a server which forwards any requests to an API request, then returns that API request to the original requester. Since this is now a server-side request, SOP will not apply, and you will be good to go.
For an example implementation check out this repository on GitHub.
https://developers.google.com/maps/documentation/directions
This is the Directions API web service. It does not require adding a <script> tag.
You can make direct requests to the service as per the example:
https://maps.googleapis.com/maps/api/directions/json?origin=75+9th+Ave+New+York,+NY&destination=MetLife+Stadium+1+MetLife+Stadium+Dr+East+Rutherford,+NJ+07073&key=YOUR_API_KEY
once you have generated an API key and replaced YOUR_API_KEY in the request with your own key.
I'm currently developing a ReactJS & Firebase app, but I'm facing the following problem:
As all the code is run in the client side, how can I connect to the payment API without exposing my private token?
I was thinking on creating a Google Cloud Function that could handle this requests. I think this functions should manage maybe a sign in to get the token, and later request the payments. Should this work?
Right now Google Cloud Functions isn't free to make requests out of a Google app. Does someone know how could I avoid the $25/month?
Another alternative I was thinking on was creating a Rails API on Heroku to manage only this requests, but I'm not sure if I'm not exposing the tokens by managing the logic on the front side. (Because the front end would have to talk to Firebase and this new API)
Security is a must.
Thanks!
I am trying to use HTTP APIs mentioned in below link to access my IoT devices and their data: https://docs.internetofthings.ibmcloud.com/swagger/v0002.html#!/Organization_Configuration/get
I am using my 6 digit organization code to access these apis and I have created API Key from IBM Watson to access these apis.
I am attaching snapshot of postman REST Api client, which I am using to send request from my local database to server.
Thanks in advance.
Are you using the version 1 APIs for the Watson IoT Platform? Those were replaced by more powerful version 2 APIs last year and v1 has now been deprecated.
Delete your current api and create a new api from your IBM watson.
Copy that new api secret username and password at time of creation (as you can't see it once it's created) and put it to any rest client.
This worked for me!
I have an angular app on a node js server. On another machine, I have an API server. My dilemma is how to communicate with the API server. The first approach is to send all my AJAX calls directly to the API server. The downside of this approach that the client will see how I send the requests to the API, including the secret key I send in the headers. This means I will have to work harder to secure my API. The other approach is to send my requests to my node js server, and then forward them to the API server. The downside of this approach, however, is increased latency, since it will require two serial HTTP requests. I would love to hear from you what you think is the best way to handle this.
Thanks.
First approach, and you "have to work harder to secure your API". I recommend JWT autthorization.
The most popular and reliable solution for this widely followed architecture style (Front End App to Backend API Server) is OAuth.
OAuth is very easy to setup and use with Angular Js.
As far as AJAX calls are concerned, if your application entails this behavior make sure your API is enable with CORS capability.