Gasp Monorepo

Do not use it in Production, testnet only.

Monorepo consists of:

1. (RollDown) Gasp ETH Contract: Smart contract on the Ethereum blockchain that receives ERC20 token deposits and withdrawal requests.
2. Gasp Sequencer: Decentralized service that reads updates from the Gasp ETH Contract and submits transactions with the information to the collator. It also monitors other sequencers for malicious activity and submits cancel requests before the dispute period ends for deposits.
3. Gasp Collator (Gasp blockchain node): Responsible for building blockchain blocks on the Gasp L2 network built in Rust and Substrate framework. Based on information received from the sequencer, can also execute deposits and withdrawal requests.
4. Gasp Updater: Monitors finished tasks on Eigen Layer and submits its results to (RollDown) Gasp ETH Contract
5. Aggregator & Task Manager: Gasp runs an off-chain service that generates "tasks" and aggregates tasks processed by Eigen Layer operators. In our case, it will generate a task to finalize every 100th block. The Aggregator will sign the Ethereum TX to the Eigen ETH Contract. This service is a centralized off-chain worker.
6. ** AVS Finalizer - (Eigen Operator - AVS):** Collection of decentralized AVS operators that handle tasks. In our case, the task will be “Merkle root verification” and “operator list change”. Operators will sign the results and provide it to the aggregator. The operator will also finalise the block by re-executing it.
7. Eigen ETH Contracts: Smart contracts (approx. 15) that handle the storage Merkle Roots and actual Operator Lists with coresponding BLS aggregated keys and stakes.

Dependencies

You will need foundry to run local testnet. You will need Rust toolchain to build avs-finalizer binary. And golang toolchain with zap-pretty to run the aggregator.

curl -L https://foundry.paradigm.xyz | bash
foundryup

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

go install github.com/maoueh/zap-pretty@latest

Running via make

This simple session illustrates the basic flow of the AVS. The makefile commands are hardcoded for a single avs-finalizer. For more avs-finalizers you would need to modify setup script to distribute mock ERC20 tokens and deposit into AVS per avs-finalizer. See 0_AnvilSetup.s.sol script for more info.

Init submodules and update deps,

  git submodule init
  git submodule update

Start anvil in a separate terminal:

make start-anvil-chain-with-el-and-avs-deployed

The above command starts a local anvil chain from a saved state with eigenlayer and mangata-avs contracts already deployed (but no avs-finalizer registered).

Then start the aggregator:

make start-avs-aggregator

And lately, the avs-finalizer,

make start-avs-finalizer

Running via docker-compose

Setup

• update eigen layer dependant submodules

git submodule update --init --recursive

Run

In the root folder run:

Important

--wait and --build parameters here are essential [!WARNING] For MacOS users with M1/M2 series processors parameter Use Rosetta for x86_64/amd64 emulation on Apple Silicon should be turned OFF in your Docker Desktop configurations

docker compose up --build --wait 

How to modify particular services

For every service other than:

• mangata-node
• avs-finalizer

just modify source code, tear down current docker-compose setup and run it again

avs-finalizer

Steps:

• Modify avs-finalizer sources
• rebuild avs-finalizer locally

Tear down

docker compose down -v

Avs Task Description

The architecture of the AVS contains:

• Eigenlayer core contracts
• AVS contracts
  • ServiceManager which will eventually contain slashing logic but for M2 is just a placeholder.
  • TaskManager which contains task creation and task response logic.
  • Set of registry contracts to manage avs-finalizers opted in to this avs
• Task Generator
  • in a real world scenario, this could be a separate entity, but for this simple demo, the aggregator also acts as the task generator
• Aggregator
  • aggregates BLS signatures from avs-finalizers and posts the aggregated response to the task manager
  • For this simple demo, the aggregator is not an avs-finalizer, and thus does not need to register with eigenlayer or the AVS contract. It's IP address is simply hardcoded into the finalizers' config.
• Finalizers
  • Execute a block sent to the task manager by the task generator, sign it, and send it to the aggregator

1. A task generator (in our case, same as the aggregator) publishes tasks once every regular interval (say 10 blocks, you are free to set your own interval) to the Mangata contract's createNewTask function. Each task specifies an integer blockNumber for which it wants the currently opted-in finalizers to execute it. createNewTask also takes quorumNumbers and quorumThresholdPercentage which requests that each listed quorum (we only use quorumNumber 0) needs to reach at least thresholdPercentage of finalizer signatures.

2. A registry contract is deployed that allows any eigenlayer finalizer with at least 1 delegated mockerc20 token to opt-in to this AVS and also de-register from this AVS.

3. [Finalizer] The finalizers who are currently opted-in with the AVS need to read the task number from the Task contract, execute the block, sign on that computed result (over the BN254 curve) and send their taskResponse and signature to the aggregator.

4. [Aggregator] The aggregator collects the signatures from the finalizers and aggregates them using BLS aggregation. If any response passes the quorumThresholdPercentage set by the task generator when posting the task, the aggregator posts the aggregated response to the Task contract.

5. If a response was sent within the response window, we enter the [Dispute resolution] period.

   • Not yet implemented

Avs node spec compliance

Every AVS node implementation is required to abide by the Eigenlayer AVS Node Specification. We suggest reading through the whole spec, including the keys management section, but the hard requirements are currently only to:

• implement the AVS Node API
• implement the eigen prometheus metrics

Work in progress for the current implementation of Finalizer.

StakeUpdates Cronjob

AVS Registry contracts have a stale view of finalizer shares in the delegation manager contract. In order to update their stake table, they need to periodically call the StakeRegistry.updateStakes() function. We are currently using internal script to get finalizer adresses and call the contract manually.

Integration Tests

See the integration tests README for more details.

How to start a local environment

1. Ensure you have Docker Compose installed
2. Run docker compose up -d command from the root of the repository