# Proto-Danksharding (EIP-4844) Devnet **v2** User Guide [toc] ## What's Changed? Please read through this document carefully as there have been some changes since the first Devnet. Here's a summary: - The geth and beacon clients have been updated - New geth and beacon genesis - Some beacon chain and execution networking parameters have changed - New geth/prysm bootstrap node addresses - Blob-utils has been updated to support Devnet v2 ## Peering To join the network, you'll need to build and install the following geth and prysm forks: * geth - https://github.com/mdehoog/go-ethereum/tree/eip-4844-devnet-2 * prysm - https://github.com/Inphi/prysm/tree/eip-4844-devnet-2 Both geth and prysm contain preset configuration for the Proto-Danksharding network. Similar to the way geth/prysm can be configured for testnets using `--goerli` or `--ropsten`, you can configure both using `--eip4844`. ``` echo '[Node.P2P] StaticNodes = ["enode://fdefa8b36717bd246ce338e952a3b949e608158d06c74c8b9e207439f70bfc63da27b7a4c4161a14722f7d4a256fda9c93a6dd5c26624b6a523dca2cd852ad97@34.121.33.53:30303","enode://13f2c3f2811231c384cbea2690e769321a4804a2eafb2e4c656f76c7e52624fffcfbc2a52a0a932b4dde0b321f29fb9229777126a91db9b10b26dfa2d93ce32b@34.122.190.151:30303","enode://71475ca7e915bfbe9958688fa3d5af127a0353ead52a2fff1216d374a5b8dd6a67ced237a9b52b1b9cb1a90160ce2019eaacfacbf750ecbeba8e0f439b7f930b@34.173.8.43:30303",]' > /tmp/geth_static_nodes.toml geth\ --eip4844\ --config /tmp/geth_static_nodes.toml\ --http\ --http.port=8545\ --http.api "engine,eth"\ --authrpc.port 8551 curl 'https://raw.githubusercontent.com/Inphi/eip4844-testnet/devnet-2/genesis.ssz' > ./genesis.ssz beacon-chain\ --eip4844\ --genesis-state ./genesis.ssz\ --subscribe-all-subnets\ --min-sync-peers=1\ --verbosity=debug\ --http-web3provider=$GETH_RPC_URL\ --peer=enr:-MK4QFURnlP5nu_JHdrj6XVYPo4an3tLVD3Ii_hLpFxAvdaVVLOOHPzmAYQQ4lk1U2fwb4oQIh-lYL3UbpTGYr-yJjKGAYO2dGzih2F0dG5ldHOIAAAAAAAAAACEZXRoMpCcZxEogwAP_f__________gmlkgnY0gmlwhCJ5ITWJc2VjcDI1NmsxoQIlwaxycUgJ_Ht4lYdDlInbIuRxu0HcHcFbu0D7As2SLYhzeW5jbmV0cwCDdGNwgjLIg3VkcIIu4A \ --peer=enr:-MK4QCC-n6C8hHOsUacSgYR7E2UknE_Slz5Tt8h0FiSKxiXDBrki2iwIALq9FIPreXp2GgFJqFM4Bd-1oMlrHgOPKY2GAYO2dG08h2F0dG5ldHOIAAAACAAAAACEZXRoMpCcZxEogwAP_f__________gmlkgnY0gmlwhCJ6vpeJc2VjcDI1NmsxoQNJzjxNKr7-a-iEDs0KvaL_vo1UH91kefEiWzgAdwSntYhzeW5jbmV0cw-DdGNwgjLIg3VkcIIu4A ``` The genesis files are available [here](https://github.com/Inphi/eip4844-testnet/tree/devnet-2). Alternatively, you can easily get started using this handy docker-compose [setup](https://github.com/mdehoog/eip4844-testnet). ## Getting Devnet-2 ETH You can request devnet ETH on the deployed Multifaucet: https://eip4844-faucet.vercel.app/ ## Uploading Blobs Blobs can be uploaded by sending blob transactions to geth. [blob-utils](https://github.com/Inphi/blob-utils) is a handy script that makes it easy to send blob transactions: ``` blob-utils tx\ -rpc-url <your_geth_rpc_url>\ -blob-file <blob_file>\ -to <to_address>\ -value <value>\ -private-key <account_private_key> ``` ## Downloading Blobs Blobs can be retrieved from the beacon chain network. [blob-utils](https://github.com/Inphi/blob-utils) lets you do this easily: ``` blob-utils download\ --beacon-p2p-addr <beacon_node_p2p_address>\ --slot <beacon block slot> ``` ## Public Endpoints If you don't have a node handy, feel free to use the following addresses to access the devnet. Execution RPC: https://eip-4844-alpha.optimism.io Beacon nodes: - `/ip4/34.121.33.53/tcp/13000/p2p/16Uiu2HAkwy4MJBLsCvmuPwrfVX9GqNiGeppshnsbn2BgKskCtRDE` - `/ip4/34.122.190.151/tcp/13000/p2p/16Uiu2HAmHd6WSHUEB7SrxdDR8dPVLTJqkzgPGbriej15udyQZugY` - `/ip4/34.123.117.254/tcp/13000/p2p/16Uiu2HAmSLVoxaR1ztHqBjezWFSvFa3HeTWPZNswfS4aMWob59L6` ## Troubleshooting/assistance If you have issues running the devnet, please reach out in the `#sharded-data` channel of the [Eth R&D discord](https://discord.gg/wNT8ghMbkw). ## Known Issues - BeaconBlock merkleization is incorrect iff it contains a non-zero amount of KZG commitments. This bug doesn't affect normal user interaction with the devnet. But alternative clients may find it difficult to sync with the devnet.
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Proto-Danksharding (EIP-4844) Devnet v3 User Guide

Getting Devnet-3 ETH You can request devnet ETH from the deployed Multifaucet: https://eip4844-faucet.vercel.app/ Uploading Blobs Blobs can be uploaded by sending blob transactions to geth. blob-utils is a handy script that makes it easy to send blob transactions: blob-utils tx\ -rpc-url <your_geth_rpc_url>\ -blob-file <blob_file>\ -to <to_address>\

12/24/2022
Prysm x Geth EIP4844 Interop (h/t @terencechain)

Prysm setup Clone the eip4844 branch in the Prysm repo and build the binaries $ git clone https://github.com/prysmaticlabs/prysm.git $ cd prysm $ git checkout eip4844 $ bazel build //cmd/prysmctl $ bazel build //cmd/beacon-chain $ bazel build //cmd/validator $ cd ../

12/19/2022
Optimistic Syncing for EIP-4844

We need to tweak the way optimistic sync works. Right now, a VALID block means all of its ancestors will also become VALID blocks. This breaks with EIP-4844 when blob sidecars are introduced as an optimistcally imported block lacking its sidecar will be incorrectly promoted to VALID. This makes It then becomes easy for an attacker to trick peers into treating actual invalid blocks with missing data as valid. To fix this all we have to do is change the block used as a basis for the block status transition. When a block transitions from NOT_VALIDATED to VALID, identify the latest ancestor whereby all of its own ancestors satisfy data availability: (using the same type definitions in the optimistic sync spec) def latest_valid_candidate_block(opt_store: OptimisticStore, block: BeaconBlock) -> BeaconBlock: # Assuming the input `block` is VALID chain = [] while True:

6/30/2022
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