Geesome ETH manager

Library for custom Geesome modules, that listen Ethereum contracts for user registration with their ethereum addresses. After registration - users will be able to authorize in Geesome node by MetaMask and ethereum signature.

Example

You can deploy Smart Contract for buy storage space for example. When user makes the transaction - this module will catch the event and register user. Also by Smart Contract events you can change storage limits for users and etc.

const GeesomeEthManager = require('geesome-eth-manager');
const ChainService = require("geesome-eth-manager/chainService");
const databaseService = require('geesome-eth-manager/database');

const { GeesomeClient } = require('geesome-libs/src/GeesomeClient');

const axios = require("axios");
const pIteration = require("p-iteration");

(async () => {
  const geesomeClient = new GeesomeClient({
      server: 'http://localhost:7711', // api address of GeeSome node
      apiKey: 'BWBWEGC-ZZA4DZW-QEG8HFW-GYS1KVA' // api key of admin user in GeeSome node
  });

  await geesomeClient.init();
  
  const database = await databaseService({
    name: process.env.DATABASE_NAME || 'geesome_eth_manager'
  });

  const chainService = new ChainService(process.env.RPC_SERVER || 'ws://localhost:8546');

  chainService.onReconnect(fetchAndSubscribe);

  const geesomeEthManager = new GeesomeEthManager(database, chainService, geesomeClient);
  
  await fetchAndSubscribe(false);

  setInterval(() => {
    chainService.getCurrentBlock();
  }, 30 * 1000);

  async function fetchAndSubscribe() {
    let prevBlockNumber = parseInt(await database.getValue('lastBlockNumber')) || 0;
    const currentBlockNumber = await chainService.getCurrentBlock();
    
    // Your deployed contract with abi
    const contract = chainService.createContract('myContract', '0xecb69875c977b2072f60995dcf46a32386d1efdb', [{"name":"buyStorage","inputs":[{"name":"_storageRecipient","type":"address"}],"outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x8119c065"},{"anonymous":false,"inputs":[{"indexed":false,"name":"storageRecipient","type":"uint256"}],"name":"Buy","type":"event","signature":"0x77f92a1b6a1a11de8ca49515ad4c1fad45632dd3442167d74b90b304a3c7a758"}]);

    async function handleBuyStorageEvent(event) {
      return geesomeEthManager.registerUserOperation(event.returnValues.storageRecipient);
    }
    
    await chainService.getEventsFromBlock(contract, 'Buy', prevBlockNumber).then(async (events) => {
      await pIteration.forEach(events, handleBuyStorageEvent);
    });

    chainService.subscribeForNewEvents(contract, 'Buy', currentBlockNumber, async (err, newEvent) => {
      console.log('🛎 New Buy event, blockNumber:', currentBlockNumber);
      await database.setValue('lastBlockNumber', currentBlockNumber.toString());
      await handleBuyStorageEvent(newEvent);
    });
  }
});