@fabcotech/bees v2.0.5

Bees js

General purpose 0 dependency NodeJS library for reading in distributed ledgers or distributed databases in a trustless manner.

Beesjs has been initiated in the dappy project dappy.tech, to address the problem of unique trustful API endpoints in name systems like the DNS, and more broadly the problem of reading the blockchain state without trusting a node.

npm install beesjs

Use

Beesjs does not know how to query the network, the first argument of resolve is a function that performs the request and returns a string. Each string will then be compared by Bees, until the multi-request either fails or completes.

import { resolver } from 'beesjs';

resolve(
  (id) => {
    return new Promise((resolve, reject) => {
      // this request includes DNS and CA, you are free
      // to query any endpoint any way you want
      https.get(`https://${id}`, (res) => {
        let s = '';
        res.on('data', (d) => {
          s += d.toString('utf8')
        });
        res.on('end', (d) => {
          resolve({
            type: 'SUCCESS',
            data: s,
            id: id,
          });
        });
      }).on('error', (e) => {
        console.log(e);
        resolve({
          type: 'ERROR',
          status: 500,
          id: id,
        });
      });
    });
  },
  /*
    ids
    IDs of the nodes that we want to hit/query
  */
  ['nodea.org', 'nodeb.org'],
  /*
    resolverAccuracy
    The group of [resoverAbsolute] must represent 100% of
    all successful answers
  */
  100,
  /*
    resoverAbsolute
    We want a group of 2 members to represent [resolverAccuracy]% of
    the total of succesful answers
  */
  2,
  a => a
)
  .then(resp => {
    if (resp.statue === "completed") {
      console.log('multi-request / co-resolution succeeded'):

      // resp contains all the groups of answers, you have to iterate over
      // the keys to know which group is the most important
      let winnerGroup = {
        data: '',
        ids: [],
      };
      Object.keys(resp.loadState).forEach((key) => {
        if (resp.loadState[key].ids.length > data.ids.length) {
          winnerGroup = {
            data: resp.loadState[key].data,
            ids: resp.loadState[key].ids,
          };
        }
      });

      console.log(`result of multirequest ${winnerGroup.ids.length} nodes in winning group :`);
      console.log(winnerGroup);
    } else {
      console.log('multi-request / co-resolution did not succeed');
      console.log(resp);
    }
  })
  .catch(err => {
    console.log('something went wrong');
    throw err;
  })

Test and build

# test
npm run test

# build
npm run build && npm run build:declaration