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@aws/web3-http-provider

v1.0.1

Published

Web3 HTTP provider for Amazon Managed Blockchain that handles AWS Signature Version 4 authentication

Downloads

966

Readme

@aws/web3-http-provider

This is an npm package that takes care of Signature Version 4 authentication for HTTP connections to Ethereum nodes on Amazon Managed Blockchain.

Installing

Install and save as a dependency using NPM: npm install @aws/web3-http-provider --save

Example

This example assumes that your AWS IAM-related environment variables have been set previously. For example:

export AWS_ACCESS_KEY_ID=...
export AWS_SECRET_ACCESS_KEY=...

# if your IAM credentials are temporary:
export AWS_SESSION_TOKEN=...
const Web3 = require('web3');
const AWSHttpProvider = require('@aws/web3-http-provider');
const endpoint = 'https://nd-NODEID.ethereum.managedblockchain.REGION.amazonaws.com';
const web3 = new Web3(new AWSHttpProvider(endpoint));
web3.eth.getNodeInfo().then(console.log);

You may also provide your credentials directly to the constructor arguments of a new instance of AWSHttpProvider():

const Web3 = require('web3');
const AWSHttpProvider = require('@aws/web3-http-provider');

const credentials = {
  accessKeyId: process.env.AWS_ACCESS_KEY_ID, 
  secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
}
const endpoint = <your Amazon Managed Blockchain HTTP URL>
const web3 = new Web3(new AWSHttpProvider(endpoint, credentials));
web3.eth.getNodeInfo().then(console.log);

This reusable HTTP provider can be used to create a valid HTTP provider in the popular Ethers.js library:

In your project's root directory, install ethers: npm install ethers --save

const ethers = require('ethers');
const AWSHttpProvider = require('@aws/web3-http-provider');

const credentials = {
  accessKeyId: process.env.AWS_ACCESS_KEY_ID, 
  secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
}
const endpoint = 'https://nd-NODEID.ethereum.managedblockchain.REGION.amazonaws.com';
const baseProvider = new AWSHttpProvider(endpoint, credentials));
let provider = new ethers.providers.Web3Provider(baseProvider);

Testing

To test this package, follow the instructions in test/README.

Security

See CONTRIBUTING for more information.

License

This library is licensed under the LGPL-3.0 License.