In-depth documentation is available at docs.sablier.com.

Sablier Lockup is a token distribution protocol that enables onchain vesting and airdrops. Our flagship model is the linear stream, which distributes tokens on a continuous, by-the-second basis.

The way it works is that the sender of a payment stream first deposits a specific amount of ERC-20 tokens in a contract. Then, the contract progressively allocates the funds to the recipient, who can access them as they become available over time. The payment rate is influenced by various factors, including the start and end times, as well as the total amount of tokens deposited.

This is the recommended approach.

Install Lockup using your favorite package manager, e.g., with Bun:

bun add @sablier/lockup

This installation method is not recommended, but it is available for those who prefer it.

Install the submodule using Forge:

forge install sablier-labs/lockup

Then, install the project's dependencies:

forge install sablier-labs/evm-utils@v1.0.0 OpenZeppelin/openzeppelin-contracts@v5.3.0 PaulRBerg/prb-math@v4.1.0

You may notice that some test files are accompanied by .tree files. This is because we are using Branching Tree Technique and Bulloak.

This is just a glimpse of Sablier Lockup. For more guides and examples, see the documentation.

import { ISablierLockup } from "@sablier/lockup/src/interfaces/ISablierLockup.sol";
contract MyContract {
 ISablierLockup lockup;
 function buildSomethingWithSablier() external {
 // ...
 }
}

Lockup uses a singleton-style architecture, where all streams are managed in the SablierLockup contract. That is, Sablier does not deploy a new contract for each distribution model or stream. It bundles all streams into a single contract, which is more gas-efficient and easier to maintain.

For more information, see the Technical Overview in our docs, as well as these diagrams.

The list of all deployment addresses can be found here. For guidance on the deployment scripts, see the Deployments Guide in our docs.

The codebase has undergone rigorous audits by leading security experts from Cantina, as well as independent auditors. For a comprehensive list of all audits conducted, please click here.

For any security-related concerns, please refer to the SECURITY policy. This repository is subject to a bug bounty program per the terms outlined in the aforementioned policy.

Feel free to dive in! Open an issue, start a discussion or submit a PR. For any informal concerns or feedback, please join our Discord server.

For guidance on how to create PRs, see the CONTRIBUTING guide.

See LICENSE.md.