Beerus

Beerus is a Starknet Light Client inspired by and using helios.

See the Beerus Book for more info.

Getting Started

cargo build --release

# insert valid api keys
./target/release/beerus -c examples/conf/beerus.json

# wait for server to start
hurl examples/rpc/starknet_getStateRoot.hurl

Config

Beerus relies on TWO untrusted RPC endpoints. As these are untrusted they will typically not be nodes run on your local host or your local network. These untrusted RPC providers must adhere to both the l1 eth_getProof endpoint as well as the l2 pathfinder_getProof endpoint. For this we recommend using Alchemy as your untrusted L2 node provider.

NOTE: we rely on helios for both valid checkpoint values and consensus rpc urls

field	example	description
network	MAINNET or GOERLI	network to query
eth_execution_rpc	https://eth-mainnet.g.alchemy.com/v2/YOURAPIKEY	untrusted l1 node provider url
starknet_rpc	https://starknet-mainnet.g.alchemy.com/v2/YOURAPIKEY	untrusted l2 node provider url
data_dir	tmp	OPTIONAL location to store both l1 and l2 data
poll_secs	5	OPTIONAL seconds to wait for querying sn state
rpc_addr	127.0.0.1:3030	OPTIONAL local address to listen for rpc reqs
fee_token_addr	0x049d36...e004dc7	OPTIONAL fee token to check for getBalance

Development

Build

cargo build --all --release

Test

cargo test --all

Docker

docker build . -t beerus

docker run -e NETWORK=<arg> -e ETH_EXECUTION_RPC=<arg> -e STARKNET_RPC=<arg> -it beerus

Examples (currently broken on Helios deps)

cd examples/core
cargo run --example basic
cargo run --example call

Beerus JS(wasm demo)

Dependencies:

• npm
• CORS bypass
• local pathfinder node at http://localhost:9545
• execution env var - ETH_EXECUTION_RPC

cd examples/wasm

# install node deps
npm i

# build webpack & wasm modules
npm run build

# run example
./run.sh

# navigate browser to http://localhost:8080
# open developer console

Endpoint support

Starknet endpoints (in compliance with Starknet specs):

Endpoint	Supported
starknet_getBlockWithTxHashes	✅
starknet_getBlockWithTxs	✅
starknet_getStateUpdate	✅
starknet_getStorageAt	✅
starknet_getTransactionByHash	✅
starknet_getTransactionByBlockIdAndIndex	✅
starknet_getTransactionReceipt	✅
starknet_getClass	✅
starknet_getClassHashAt	✅
starknet_getClassAt	✅
starknet_getBlockTransactionCount	✅
starknet_call	✅
starknet_estimateFee	✅
starknet_estimateFeeSingle	✅
starknet_blockNumber	✅
starknet_blockHashAndNumber	✅
starknet_chainId	✅
starknet_pendingTransactions	✅
starknet_syncing	✅
starknet_syncing	✅
starknet_getEvents(not validated)	✅
starknet_getNonce	✅
starknet_addDeclareTransaction	❌
starknet_addDeployAccountTransaction	❌
starknet_addInvokeTransaction	❌
starknet_getProof	✅
starknet_getBalance	✅
starknet_getStateRoot	✅

Support

Reach out to the maintainer at one of the following places:

• GitHub Discussions
• Contact options listed on this GitHub profile

Security

Beerus follows good practices of security, but 100% security cannot be assured. Beerus is provided "as is" without any warranty. Use at your own risk.

_For more information and to report security issues, please refer to our security documentation.

Acknowledgements

• Huge props to A16z for their work on helios.

Contributors ✨

The contributors page.

Thanks goes to these wonderful people (emoji key):

Abdel @ StarkWare ⚠️ 💻	Lucas @ StarkWare 💻	danilowhk 💻	Clément Walter 💻	Elias Tazartes 💻	drspacemn 💻	Mathieu 💻
TurcFort07 📖	Florian Bellotti 💻	Tom Brand 💻	ftupas 💻	pscott 💻	Robin Straub 💻	Francisco Krause Arnim 📖
joshualyguessennd 📖	Santiago Galván (Dub) 💻	chirag-bgh 💻	greged93 💻	bigherc18 💻	Lakhdar Slaim 💻	Lance N. Davis 💻
Tino Huynh 💻	Iris 💻	Alex Ponce 💻	glihm 💻	Paul-Henry Kajfasz 💻	Damián Piñones 💻	Betacodd 💻
Godspower-eze 💻	somthn0somthn 💻	tonypony220 💻
Add your contributions

This project follows the all-contributors specification. Contributions of any kind welcome!