Centralized Sequencer

centralized-sequencer is an implementation of the Generic Sequencer interface for modular blockchains. It runs a gRPC service, which can be used by rollup clients to sequence transactions to DA layer.

Minimum requirements

Requirement	Notes
Go version	1.22 or higher

Installation

git clone https://github.com/rollkit/centralized-sequencer.git
cd centralized-sequencer
make build
./build/centralized-sequencer -h

Usage

centralized-sequencer exposes a gRPC service that can be used with any gRPC client to sequence rollup transactions to a DA layer.

Example

Run centralized-sequencer by specifying DA network details:

    ./build/centralized-sequencer -da_address <da_address> -da_auth_token <da_auth_token> -da_namespace $(openssl rand -hex 10)

Flags

Flag	Usage	Default
batch-time	time in seconds to wait before generating a new batch	2 seconds
da_address	DA address	http:////localhost:26658
da_auth_token	auth token for the DA	""
da_namespace	DA namespace where the sequencer submits transactions	""
host	centralized sequencer host	localhost
port	centralized sequencer port	50051
listen-all	listen on all network interfaces (0.0.0.0) instead of just localhost	disabled
metrics	enable prometheus metrics	disabled
metrics-address	address to expose prometheus metrics	":8080"

See ./build/centralized-sequencer --help for details.

Tools

1. Install golangci-lint
2. Install markdownlint
3. Install hadolint
4. Install yamllint

Helpful commands

# Print centralized-sequencer commands
centralized-sequencer --help

# Run unit tests
make test-unit

# Run all tests including integration tests
make test

# Run linters (requires golangci-lint, markdownlint, hadolint, and yamllint)
make lint

Contributing

We welcome your contributions! Everyone is welcome to contribute, whether it's in the form of code, documentation, bug reports, feature requests, or anything else.

If you're looking for issues to work on, try looking at the good first issue list. Issues with this tag are suitable for a new external contributor and is a great way to find something you can help with!