🌟Eligibility & Accountability Criteria

Requirements for Wearers

The permissions and authorities that can be accessed via a hat can be granted and revoked by designated individual or group admins, as well as based on a wide range of automated eligibility and accountability criteria using Hats Modules.

Hats Modules are programmable extensions for roles. Modules can be connected to hats to expand their functionality, such as enabling automatic granting and revocation of hats (and their associated permissions) based on specific conditions.

Any combination of permissions and authorities can be granted or revoked automatically based on a customizable set of criteria, including:

• Tokens, NFTs, and attestations, including ERC20 token balance, ERC721 NFTs, ERC1155 NFT tokenIDs, and EAS attestations

• Elections and allowlists, including election results from JokeRace, Snapshot, or Tally, automatic term limits, and manually-created allowlists

• Achievements and reputation, like badges, onchain points, Colinks, or Gitcoin passport score

• Prerequisite actions, like staking, signing an agreement, holding other roles, or being a subscriber

• And more: combine multiple criteria with and/or logic, introduce AI agents, or create granular onchain or offchain triggers

Ways to automate hat granting and revocation

Anyone can create their own eligibility or accountability criteria, or tap into the Hats ecosystem of Hats Modules—programmable extensions for roles—built permissionlessly by community developers and distributed via the Hats Modules Registry, which is curated by Hats protoDAO via the Modules Registry Curator hat. Likewise, any app can tap into the same infrastructure to offer the fast-growing suite of Hats Modules options to their end-users.

Eligibility Modules

A hat’s eligibility module is an address that determines which addresses are eligible to wear that hat, and can revoke the hat the instant the wearer is no longer eligible.

For more details on Hats Modules, including what they can unlock and how builders can create new modules, see this blog post. You can also visit this docs page for a general guide about Eligibility Modules.

See the subpages within this section for detailed guides for specific eligibility modules you can currently use with Hats:

ERC20 EligibilityERC721 EligibilityERC1155 EligibilityStaking EligibilityJokeRace EligibilityPass-Through (Hat-Based) EligibilityHat-Wearing EligibilityAllow-List EligibilityHats Election EligibilityCoLinks Eligibility

Eligibility modules can also be combined with claimable hats to enable addresses to claim and wear a given hat only if they fulfill specific eligibility criteria. For more information, check out the guide here.

Modules Coming Soon

• Onchain signature of an agreement

• Gitcoin Passport score

• Attestations

• Combine multiple criteria!

• Request a new module here or create your own!

Digging Deeper

For more technical details on how Hats eligibility modules work, see the Eligibility Modules page within the "For Developers" section of these docs.

Building Modules

Modules customize, automate, and extend the behavior of Hats Protocol, and can also serve as adapters or integration points with other protocols and applications.

In a sense, modules are the lifeblood of Hats Protocol. The design space is wide open, ready to be filled with all the possible building blocks of human organization and coordination.

There are two primary ways for developers to work with Hats Modules. Whether you're building new modules or using the Modules SDK to interact with or build applications for existing modules, we have a number of developer tools to make your job easier. See the page below to get started.

🧩Hats Modules