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# Prysm x Geth EIP4844 Interop ## Prysm setup Clone the `eip4844` branch in the Prysm repo and build the binaries ```shell= $ 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 ../ ``` ## Geth setup Clone the `eip-4844` branch in `mdehoog`'s geth repo and build the binary ```shell= $ git clone https://github.com/mdehoog/go-ethereum.git $ cd go-ethereum $ git checkout eip-4844 $ make geth ``` ## Create the config files Create the following config files and remember the location of each config file :point_down: Create a `genesis.json` file and remember path as `$PATH_TO_GENESIS` ```jsonld= { "config": { "ChainName": "l1_chain", "chainId": 32382, "consensus": "clique", "homesteadBlock": 0, "daoForkSupport": true, "eip150Block": 0, "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000", "eip155Block": 0, "eip158Block": 0, "byzantiumBlock": 0, "constantinopleBlock": 0, "petersburgBlock": 0, "istanbulBlock": 0, "muirGlacierBlock": 0, "berlinBlock": 0, "londonBlock": 0, "terminalBlockHash": "0x0000000000000000000000000000000000000000000000000000000000000000", "arrowGlacierBlock": 0, "grayGlacierBlock": 0, "shanghaiTime": XXX, "shardingForkTime": YYY, "clique": { "period": 5, "epoch": 30000 }, "terminalTotalDifficulty": 25 }, "difficulty": "1", "gasLimit": "30000000", "extradata": "0x0000000000000000000000000000000000000000000000000000000000000000123463a4B065722E99115D6c222f267d9cABb5240000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "alloc": { "0x4242424242424242424242424242424242424242": { "balance": "0", "code": 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}, "0x123463a4B065722E99115D6c222f267d9cABb524": { "balance": "20000000000000000000000" }, "0x5678E9E827B3be0E3d4b910126a64a697a148267": { "balance": "20000000000000000000000" }, "0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266": { "balance": "10000000000000000000000" }, "0x70997970c51812dc3a010c7d01b50e0d17dc79c8": { "balance": "10000000000000000000000" }, "0x3c44cdddb6a900fa2b585dd299e03d12fa4293bc": { "balance": "10000000000000000000000" }, "0x90f79bf6eb2c4f870365e785982e1f101e93b906": { "balance": "10000000000000000000000" }, "0x15d34aaf54267db7d7c367839aaf71a00a2c6a65": { "balance": "10000000000000000000000" }, "0x9965507d1a55bcc2695c58ba16fb37d819b0a4dc": { "balance": "10000000000000000000000" }, "0x976ea74026e726554db657fa54763abd0c3a0aa9": { "balance": "10000000000000000000000" }, "0x14dc79964da2c08b23698b3d3cc7ca32193d9955": { "balance": "10000000000000000000000" }, "0x23618e81e3f5cdf7f54c3d65f7fbc0abf5b21e8f": { "balance": "10000000000000000000000" }, "0xa0ee7a142d267c1f36714e4a8f75612f20a79720": { "balance": "10000000000000000000000" }, "0xbcd4042de499d14e55001ccbb24a551f3b954096": { "balance": "10000000000000000000000" }, "0x71be63f3384f5fb98995898a86b02fb2426c5788": { "balance": "10000000000000000000000" }, "0xfabb0ac9d68b0b445fb7357272ff202c5651694a": { "balance": "10000000000000000000000" }, "0x1cbd3b2770909d4e10f157cabc84c7264073c9ec": { "balance": "10000000000000000000000" }, "0xdf3e18d64bc6a983f673ab319ccae4f1a57c7097": { "balance": "10000000000000000000000" }, "0xcd3b766ccdd6ae721141f452c550ca635964ce71": { "balance": "10000000000000000000000" }, "0x2546bcd3c84621e976d8185a91a922ae77ecec30": { "balance": "10000000000000000000000" }, "0xbda5747bfd65f08deb54cb465eb87d40e51b197e": { "balance": "10000000000000000000000" }, "0xdd2fd4581271e230360230f9337d5c0430bf44c0": { "balance": "10000000000000000000000" }, "0x8626f6940e2eb28930efb4cef49b2d1f2c9c1199": { "balance": "10000000000000000000000" } } } ``` Note that `shanghaiTime` is hardcoded as `XXX` and `shardingForkTime` is hardcoded as `YYY`. They will be repalced later by real fork unix times Create a `config.yml` file and remember path as `$PATH_TO_CONFIG` ```yml= CONFIG_NAME: interop PRESET_BASE: interop # Genesis GENESIS_FORK_VERSION: 0x20000089 # Altair ALTAIR_FORK_EPOCH: 2 ALTAIR_FORK_VERSION: 0x20000090 # Merge BELLATRIX_FORK_EPOCH: 3 BELLATRIX_FORK_VERSION: 0x20000091 TERMINAL_TOTAL_DIFFICULTY: 50 # Capella CAPELLA_FORK_EPOCH: 4 CAPELLA_FORK_VERSION: 0x20000092 MAX_WITHDRAWALS_PER_PAYLOAD: 4 # EIP4844 EIP4844_FORK_EPOCH: 5 EIP4844_FORK_VERSION: 0x20000093 # Time parameters SECONDS_PER_SLOT: 6 SLOTS_PER_EPOCH: 6 # Deposit contract DEPOSIT_CONTRACT_ADDRESS: 0x4242424242424242424242424242424242424242 ``` Create a `jwtsecret.txt` file and remember path as `$PATH_TO_JWTSECRET` ``` 0xfad2709d0bb03bf0e8ba3c99bea194575d3e98863133d1af638ed056d1d59345 ``` Within your geth datadir, you can to include the following keystore file `UTC--2022-08-19T17-38-31.257380510Z--123463a4b065722e99115d6c222f267d9cabb524`. That will enable you to unlock and mine later ``` {"address":"123463a4b065722e99115d6c222f267d9cabb524","crypto":{"cipher":"aes-128-ctr","ciphertext":"93b90389b855889b9f91c89fd15b9bd2ae95b06fe8e2314009fc88859fc6fde9","cipherparams":{"iv":"9dc2eff7967505f0e6a40264d1511742"},"kdf":"scrypt","kdfparams":{"dklen":32,"n":262144,"p":1,"r":8,"salt":"c07503bb1b66083c37527cd8f06f8c7c1443d4c724767f625743bd47ae6179a4"},"mac":"6d359be5d6c432d5bbb859484009a4bf1bd71b76e89420c380bd0593ce25a817"},"id":"622df904-0bb1-4236-b254-f1b8dfdff1ec","version":3} ``` ## Interop time :tada: :warning: We MUST launch the beacon node before geth; messing up the order will result in run time failure and you will have to start from scratch 1. Beacon node 2. Validator 3. Geth ### Start beacon node First you will need to **CD to your Prysm directory**. Set up your genesis time and set up Shanghai hardfork time to 144 seconds later. Please fill in `$PATH_TO_GENESIS` to the location that you created earlier. Then Run the following: ```bash= #!/bin/bash GENESIS=$(($(date +%s) + 30)) # 120s until genesis, feel free to increase this to give you more time to everything # The following are configureable too but you have to make sure they align. # Take SECONDS_PER_SLOT * SLOTS_PER_EPOCH * CAPELLA_FORK_EPOCH for SHANGHAI # Take SECONDS_PER_SLOT * SLOTS_PER_EPOCH * EIP4844_FORK_EPOCH for CANCUN SHANGHAI=$(($GENESIS + 108)) CANCUN=$(($GENESIS + 144)) sed -i -e 's/XXX/'$SHANGHAI'/' $PATH_TO_GENSIS/genesis.json sed -i -e 's/YYY/'$CANCUN'/' $PATH_TO_GENESIS/genesis.json ``` Within your Prysm directory. Please fill in `$PATH_TO_DATADIR`. Selection where you want the database to be ```bash= bazel run //cmd/prysmctl -- testnet generate-genesis --num-validators=512 --output-ssz=$PATH_TO_DATADIR/genesis.ssz --chain-config-file=$PATH_TO_CONFIG/config.yml --genesis-time=$GENESIS bazel run //cmd/beacon-chain -- \ --datadir=$PATH_TO_DATADIR \ --min-sync-peers=0 \ --force-clear-db \ --interop-genesis-state=$PATH_TO_DATADIR/genesis.ssz \ --interop-eth1data-votes \ --bootstrap-node= \ --chain-config-file=$PATH_TO_CONFIG/config.yml \ --chain-id=32382 \ --accept-terms-of-use \ --jwt-secret=$PATH_TO_JWTSECRET/jwtsecret.txt \ --suggested-fee-recipient=0x123463a4b065722e99115d6c222f267d9cabb524 \ --verbosity debug ``` ### Start validator Within your prysm directory, run the following to start the validator: ```bash= bazel run //cmd/validator -- \ --datadir=$PATH_TO_DATADIR \ --accept-terms-of-use \ --interop-num-validators=512 \ --interop-start-index=0 \ --chain-config-file=$PATH_TO_CONFIG/config.yml ``` ### Start geth Last but not least, we need to start geth. **CD to your Geth directory**. You will need to find a location to store Geth data `$PATH_TO_GETH`. Then run the following: ```bash= ./build/bin/geth --datadir $PATH_TO_GETH init $PATH_TO_GENESIS/genesis.json ./build/bin/geth --http \ --datadir=$PATH_TO_GETH \ --nodiscover \ --syncmode=full \ --allow-insecure-unlock \ --mine \ --authrpc.jwtsecret=$PATH_TO_JWTSECRET/jwtsecret.txt ``` ### How do you know it's working? Genesis state generated ![](https://i.imgur.com/aB1yDZO.png) Chain started (ignore unknown finalized root errors) ![](https://i.imgur.com/k7spneE.png) Forked to Bellatrix and Merged :panda_face: ![](https://i.imgur.com/Ps66Q7Z.png) Forked to EIP4844 :tada: ![](https://i.imgur.com/DXo7YI3.png) ### Test syncing with a secondary node To add an additional beacon node to sync on the devnet using a few command with a few tweaks, in a new terminal window, enter: ``` curl localhost:8080/p2p ``` You should get an output similar to: ``` bootnode=[] self=enr:-MK4QCxV5SEkUO1chqZDSqMChX5fTbqeas4PEJqZtzmcWqZOKpZN8ABVrQFTqHI74M9TKNjE6DPAAgyv5JydsQ6NfPqGAYKxymm8h2F0dG5ldHOI-7v9vd4GdE2EZXRoMpCMkQYoIAAAkf__________gmlkgnY0gmlwhAoAAEqJc2VjcDI1NmsxoQNZcfvPnVEfnKz-mFv285nkDzgRXRVujloXQ_tjuCNEbYhzeW5jbmV0cw-DdGNwgjLIg3VkcIIu4A,/ip4/10.0.0.74/tcp/13000/p2p/16Uiu2HAmJg9Sfy8bX4wyjZNTi8soJrdPt9E9pPzJSmewN5rLoRM6 ``` Copy paste the part that starts with `/ip4` ``` /ip4/10.0.0.74/tcp/13000/p2p/16Uiu2HAmJg9Sfy8bX4wyjZNTi8soJrdPt9E9pPzJSmewN5rLoRM6 ``` Then set this as an environment variable: export PEER=/ip4/10.0.0.74/tcp/13000/p2p/16Uiu2HAmJg9Sfy8bX4wyjZNTi8soJrdPt9E9pPzJSmewN5rLoRM6 Then run your second beacon node with the additional parameters ``` --datadir=$PATH_TO_DATADIR \ --rpc-port=4001 \ --p2p-tcp-port=13001 \ --p2p-udp-port=12001 \ --grpc-gateway-port=3501 \ --monitoring-port=8001 \ --peer=$PEER --verbosity=debug ``` That's it! Dm me if you have any questions! .oO

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