Golem Network manual for DeGen Hackathon participants.

Golem Network is a P2P network that consists of many nodes. Each node is a system with a Yagna service running on it. The nodes that offer their resources to others are called providers. The nodes that rents resources are called requestors.

Yagna is a service that enables the user to interact with the network. In practice, the user creates a requestor script utilizing one of the available Golem SDK's. The script is used to define what resources are needed, and what should be run on the provider's node and to orchestrate all activities.

For the resources consumed on the Golem Network, you pay in GLM. GLM is an ERC-20 utility token. When you run Yagna for the first time on your computer, it will create a wallet for you.

Degen hackathon participants do not need to fund their activities on the Golem Network during the event. They can apply for funds using the following process:

1. Validate eligibility.
2. Create a metamask wallet for your team.
3. Apply for funds from the Golem factory using this link
4. Split the funds to Yagna wallets used by team members.

curl -sSf https://join.golem.network/as-requestor | bash -

To start the yagna service, open a terminal and type:

yagna service run

The steps below are not part of the installation process, however they will be useful at later stages:

The app-key purpose is to allow your requestor script to securely access and interact with the Yagna API Open a terminal (command line window) and create the app-key named requestor:

yagna app-key create requestor

After running this command, make sure to copy its output. This output is your app-key, which you will need to use for setting up the YAGNA_APPKEY environment variable.

export YAGNA_APPKEY=<32-char>

Note: If you need to find your key value again at any time, you can retrieve it using the following command:

yagna app-key list

and locate the desired value in the 'key' column for copying.

To find out where to transfer funds for your Yagna wallet, you can easily obtain the address of your wallet with this command:

yagna id show

This command is not only used to find your wallet address, but it also serves as the unique identifier of your node within the network.

yagna payment status --network=polygon --driver=erc20

To create a backup of your Golem wallet, export the keystore with:

yagna id export --file-path=./key.json

This will generate a file named key.json in the directory where the command was run. This file contains the private key of your Golem wallet.

[Philip noticed that development work will result in potential requestor termination before payments are accepted, causing annoyance amongst providers. Maybe we can:

• provide intructions how to accept outstanding payments
• advise participants to thank the community to support their hackathon efforts and flush the payments at the end of the event (possible with a script that would do it automatically) ]

Create a new Node.js project and install the Golem SDK by entering the following commands in your terminal:

mkdir my_project
cd my_project
npm init
npm install @golem-sdk/task-executor

Next, create a file named requestor.mjs and paste the following content into it. This script sets up a task to execute node -v on the Golem Network and displays the result in your terminal.

import {
  TaskExecutor,
  ProposalFilters,
  MarketHelpers,
} from '@golem-sdk/golem-js'

// Prepare the price filter, prices are in GLM
const acceptablePrice = ProposalFilters.limitPriceFilter({
  start: 1,
  cpuPerSec: 1 / 3600,
  envPerSec: 1 / 3600,
})

// Collect the whitelist
const verifiedProviders = await MarketHelpers.getHealthyProvidersWhiteList()

// Prepare the whitelist filter
const whiteList = ProposalFilters.whiteListProposalIdsFilter(verifiedProviders)

;(async function main() {
  const executor = await TaskExecutor.create({
    // The image you'd like to run on the provider(s)
    package: 'golem/node:latest',

    // How much you wish to spend
    budget: 0.5,
    proposalFilter: async (proposal) =>
      (await acceptablePrice(proposal)) && (await whiteList(proposal)),

    // Which network you want to spend GLM on
    payment: {
      network: 'polygon',
    },
  })

  try {
    const result = await executor.run(
      async (ctx) => (await ctx.run('node -v')).stdout
    )
    console.log('Task result:', result)
  } catch (err) {
    console.error('An error occurred:', err)
  } finally {
    await executor.shutdown()
  }
})()

To execute the script, run:

node requestor.mjs

You can find an explanation of the structure of the above requestor script here.

The standard quickstart example has been altered with the following modifications:

• acceptablePrice filter sets the upper price limit for providers.
• The verifiedProviders filter is specifically designed to connect with the most trustworthy and reliable providers in the network. This feature is particularly beneficial during events like hackathons, where it's essential to focus on coding without unnecessary interruptions. By selecting only the most reliable providers, you significantly reduce the likelihood of encountering network-related issues or disruptions that could arise from less dependable providers, thus streamlining your development and troubleshooting process.
• payment: { network: 'polygon' } indicates that we would like to run the task on the mainnet.

The JS SDK consists of the following components:

@golem-sdk/golem-js - a JavaScript API for developers allowing them to connect to their Golem nodes and manage their distributed, computational loads through Golem Network.

GitHub Repo Documentation

@golem-sdk/cli - a companion tool for the Golem SDK. It facilitates a fast start with Golem Network by creating a new template for new applications, assisting with manifest creation for outbound networking, and lets you interactively test your custom image in the fastest way possible all without coding.

GitHub Repo Documentation

@golem-sdk/react - a set of React hooks for working with the Golem Network.

GitHub Repo Documentation

Documentation

Examples

API Reference

tesseract-ocr-golem - a golem-js based library for running Tesseract OCR jobs on the Golem Network.

GitHub Repo

react-image-classifier - a reference implementation of a React app using Golem underneath

GitHub Repo

Yagna - the foundational service that allows users to connect with and interact with the Golem Network.

Gvmkit-build - a tool designed to create custom images for virtual machines on provider nodes within the Golem Network. It specifically converts Dockerfiles into Golem-compatible VM images, known as GVMI.

You can find a list of available instructions for Golem tools: yagna and gvmkit-build.

Golem Registry - a repository of already built images that can be utilized by Golem Network users is here.