NOTE: This package is a stabe fork of aws4 and aws4-react-native modified to work with React Native apps. With the most important change - fix Buffer dependencies. The core Node JS module querystring has been replaced by querystring-browser, and crypto has been replaced by a standalone javascript file crypto.js generated using browserify.
What follows is the a slighly modified README from aws4.
import aws4 from 'react-native-aws4'; // given an options object you could pass to http.request const opts = { host: 'sqs.us-east-1.amazonaws.com', path: '/?Action=ListQueues' }; // alternatively (as aws4 can infer the host): opts = { service: 'sqs', region: 'us-east-1', path: '/?Action=ListQueues' } // alternatively (as us-east-1 is default): opts = { service: 'sqs', path: '/?Action=ListQueues' } aws4.sign(opts) // assumes AWS credentials are available in process.env console.log(opts) /* { host: 'sqs.us-east-1.amazonaws.com', path: '/?Action=ListQueues', headers: { Host: 'sqs.us-east-1.amazonaws.com', 'X-Amz-Date': '20121226T061030Z', Authorization: 'AWS4-HMAC-SHA256 Credential=ABCDEF/20121226/us-east-1/sqs/aws4_request, ...' } } */ // we can now use this to query AWS using the standard React Native API const url = "https://" + signedOptions.host + signedOptions.path; fetch(url, signedOptions) .then(body => body.json()) .then(json => console.log(json)); // The above code is equivalent to the following Node JS request: // http.request(opts, function(res) { res.pipe(process.stdout) }).end() /* */