sismo-protocol-overview.md

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Group Generators

Groups are a reusable tool used by Sismo to generate available Data Groups for proving schemes.

You will find more information on what are groups in this section:

{% content-ref url="../../data-groups-and-creation.md" %} data-groups-and-creation.md {% endcontent-ref %}

Generating Data Groups and making them available for proving schemes requires some infrastructure. We have developed a repository, the sismo-hub, to let anyone propose new Data Groups and make them available for Hydra proving schemes with a simple PR.

You will be able to create your own group of accounts (Ethereum addresses, Github accounts and Twitter accounts) and then use it in a Sismo Connect app.

Here is a complete tutorial describing all the group creation process steps:

{% content-ref url="../../tutorials/create-your-group-generator.md" %} create-your-group-generator.md {% endcontent-ref %}

The following documentation aims to describe the code in a more theoretical way, we strongly recommend doing the tutorial to understand what the code below is for, especially for newcomers.

Generate Function

const generator: GroupGenerator = {
  generationFrequency: GenerationFrequency.Once,

  generate: async (context: GenerationContext): Promise<GroupWithData[]> => {
    // add you code here
    return [];
  },
};

export default generator;

A group generator is a tool that allows us to easily generate groups and store them in scalable infrastructure.

The GroupGenerator object is made of a generate function which will be executed at a specific GenerationFrequency.

Here the GenerationFrequency is Once. That means it will be executed just one time. It is an Enum that accepts Daily, Weekly or Monthly value.

Let's improve our group generator to return a very simple group:

const generator: GroupGenerator = {
  generationFrequency: GenerationFrequency.Once,

  generate: async (context: GenerationContext): Promise<GroupWithData[]> => {
    return [
      {
        name: "my-simple-group",
        timestamp: context.timestamp,
        description: "description of my-simple-group"
        specs: "specs"
        data: {
          "0xF61CabBa1e6FC166A66bcA0fcaa83762EdB6D4Bd": 1,
          "0x8ab1760889f26cbbf33a75fd2cf1696bfccdc9e6": 1,
          "dhadrien.sismo.eth" : 1,
          "dhadrien.lens": 1,
          "github:leosayous21": 2,
          "github:dhadrien": 4,
          "twitter:dhadrien_": 3,
          "telegram:pelealexandru": 1
        },
        valueType: ValueType.Info,
        tags: [Tags.Mainnet, Tags.User],
      },
    ];
  },
};

export default generator;

In the above example, the group generator will create a group named my-simple-group. Its timestamp will correspond to the execution of the generate function.

This group, my-simple-group, contains 7 accounts, four Ethereum addresses (two addresses as you know them, one ENS handle and one Lens handle) which all have a value of 1, two GitHub accounts with values of 2 and 4 and one Twitter account with a value of 3 as you can see in the data field.

{% hint style="info" %}

• Tags are used to easily retrieve groups once they are generated. {% endhint %}

Learn how to query data easily:

{% content-ref url="data-providers.md" %} data-providers.md {% endcontent-ref %}

Learn how to combine groups easily:

{% content-ref url="data-operators.md" %} data-operators.md {% endcontent-ref %}

Generate your Group

You can find all the groups that can be generated in the group-generators/generators folder.
This is where you need to reference your group to see it generated in the future.

import ensVoters from "./ens-voters";
import ethereumDevelopers from "./ethereum-developers";
import ethereumMostTransactions from "./ethereum-most-transactions";
import ethereumPowerUsers from "./ethereum-power-users";
...
import sismoLensFollowers from "./sismo-lens-followers";
import sismoMasqueradeLensFollowers from "./sismo-masquerade-lens-followers";

import { GroupGeneratorsLibrary } from "topics/group-generator";

export const groupGenerators: GroupGeneratorsLibrary = {
  "ens-voters": ensVoters,
  "ethereum-developers": ethereumDevelopers,
  "ethereum-most-transactions": ethereumMostTransactions,
  "ethereum-power-users": ethereumPowerUsers,
  ...
  "sismo-lens-followers": sismoLensFollowers,
  "sismo-masquerade-lens-followers": sismoMasqueradeLensFollowers,
};

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