Getting Started

The blockchain core is a helper library, that offers helpers for interacting with the evan.network blockchain. It is written in TypeScript and offers several (up to a certain degree) stand-alone modules, that can be used for

• creating and updating contracts
• managing user profiles
• en- and decryption
• distributed filesystem file handling
• key exchange and key handling
• ENS domain handling
• sending and receiving bmails

Adding blockchain core

First you need to get blockchain core and its dependencies into your project. This can be done using the following methods:

• npm: npm install @evan.network/api-blockchain-core ipfs-api web3

After that you need to create a blockchain core runtime with a predefined configuration.

Configuring and initializing blockchain core

// require blockchain-core dependencies
const IpfsApi = require('ipfs-api');
const Web3 = require('web3');

// require blockchain-core
const { Ipfs, createDefaultRuntime } = require('blockchain-core');

const runtimeConfig = {
  // account map to blockchain accounts with their private key
  accountMap: {
    'ACCOUNTID':
      'PRIVATE KEY',
  },
  // ipfs configuration for evan.network storage
  ipfs: {host: 'ipfs.evan.network', port: '443', protocol: 'https'},
  // web3 provider config (currently evan.network testcore)
  web3Provider: 'wss://testcore.evan.network/ws',
};

// initialize dependencies
const web3 = new Web3();
web3.setProvider(new web3.providers.WebsocketProvider(runtimeConfig.web3Provider));
const dfs = new Ipfs({ remoteNode: new IpfsApi(runtimeConfig.ipfs), });

// create runtime
const runtime = await createDefaultRuntime(web3, dfs, { accountMap: runtimeConfig.accountMap, });

That’s it! now you can use the runtime object and interact with the evan.network blockchain.

The blockchain-core api is a set of modules which can be plugged in individually. So the above runtime is a full blown entry point to the api. You can also plug your own runtime with needed modules together.