/concrete-geth

Concrete is a framework for building application-specific rollups on the OP Stack

Primary LanguageGoGNU Lesser General Public License v3.0LGPL-3.0

Moved to concrete-eth/concrete-geth.

Concrete

Concrete is a framework for building application-specific rollups on the OP Stack.

Concrete blockchains are general-purpose EVM rollups that have been enhanced at the protocol level to meet the needs of a specific use case, like expensive cryptography, spatial indexing, or complex digital physics.

With the Concrete API, you can build a rollup that fits your needs, without having to deal with the low-level complexity of forking an Ethereum client.

With Concrete, you can:

  • Write app-specific code in any language that compiles to WASM.

  • Add supercharged, stateful precompiles to the EVM using common structures like maps, arrays, and structs.

  • Extend the structure of storage beyond the MPT (Merkle Patricia Tree) to reap huge performance gains (see below).

  • Take advantage of chain introspection to make your app-specific contracts compatible with non-enhanced chains.

  • Use existing EVM-compatible tools like MUD, Foundry, Otterscan, and more.

Installing the Concrete CLI

Requirements:

  • Go 1.19 or higher
  • $GOPATH/bin or $GOBIN in $PATH (more info)

Installation:

Run the following command from the project root to install the concrete CLI tool:

go install ./concrete/cmd/concrete

Getting started

To get started, check out the concrete project template.

Join our Discord to get support and connect with the community.

Built on Concrete

Mudtendo

An Autonomous World where participants use a 1985 Nintendo console to create stories together.

Mudtendo is a MUD application running on a Concrete app-chain with a built-in emulator for the NES (an old Nintendo game console).

Quadrosol

The Quadrosol Concrete app-chain has 2D spatial indexing built-in, enabling fast spatial queries for games and other applications.

By storing indexing nodes outside the MPT and running natively in Go, it outperforms a Solidity implementation by over 6x in speed and 70% in database footprint!

The codebase

This repo is built on top of op-geth, the default execution-engine for the OP Stack, which itself is built on top of geth.

Find the diff with op-geth here, the most notable changes are in core/state/statedb and core/vm/evm.go.

The framework-specific code is under /concrete and the bindings to compile TinyGo precompiles to WASM are under /tinygo.