nimbus-eth2/docs/kiln_geth_local_testnet.md

How to run Geth

• Clone Geth: `git clone --branch merge-kiln https://github.com/MariusVanDerWijden/go-ethereum.git ~/execution_clients/go-ethereum
• Build Geth with make geth
• Run scripts/run-catalyst.sh to run Geth. It listens on port 8551.

Verify Geth is working

• Clone Nimbus and check out the kiln branch
• Run scripts/run-catalyst.sh. This depends on the paths set up in the first section. If those are changed, adjust accordingly.
• While the Geth console is running, run scripts/check_merge_test_vectors.sh.

The results should be similar to

engine_forkchoiceUpdatedV1 response: {"jsonrpc":"2.0","id":67,"result":{"payloadStatus":{"status":"VALID","latestValidHash":null,"validationError":null},"payloadId":"0xa247243752eb10b4"}}
engine_getPayloadV1 response: {"jsonrpc":"2.0","id":67,"result":{"parentHash":"0x3b8fb240d288781d4aac94d3fd16809ee413bc99294a085798a589dae51ddd4a","feeRecipient":"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b","stateRoot":"0xca3149fa9e37db08d1cd49c9061db1002ef1cd58db2210f2115c8c989b2bdf45","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","random":"0x0000000000000000000000000000000000000000000000000000000000000000","blockNumber":"0x1","gasLimit":"0x1c95111","gasUsed":"0x0","timestamp":"0x5","extraData":"0x","baseFeePerGas":"0x7","blockHash":"0x6359b8381a370e2f54072a5784ddd78b6ed024991558c511d4452eb4f6ac898c","transactions":[]}}
engine_executePayloadV1 response: {"jsonrpc":"2.0","id":67,"result":{"status":"VALID","latestValidHash":"0x3559e851470f6e7bbed1db474980683e8c315bfce99b2a6ef47c057c04de7858","validationError":null}}
engine_forkchoiceUpdatedV1 response: {"jsonrpc":"2.0","id":67,"result":{"payloadStatus":{"status":"VALID","latestValidHash":null,"validationError":null},"payloadId":null}}
engine_getPayloadV1 error case response: {"jsonrpc":"2.0","id":67,"error":{"code":-32602,"message":"invalid argument 0: invalid payload id \"0x01\": hex string has length 2, want 16 for PayloadID"}}
engine_getPayloadV1 error case response: {"jsonrpc":"2.0","id":67,"error":{"code":-32001,"message":"Unknown payload"}}
engine_getPayloadV1 case response: {"jsonrpc":"2.0","id":67,"result":{"payloadStatus":{"status":"SYNCING","latestValidHash":null,"validationError":null},"payloadId":null}}
Kiln test vectors passed

• If issues present themselves here, or when Nimbus attempts to use the API, one can debug.verbosity(4) console command in Geth.

Verify that Nimbus runs through the same examples

• Run ./env.sh nim c -r tests/test_merge_vectors.nim. It should show output akin to:

[Suite] Merge test vectors
  [OK] getPayload, newPayload, and forkchoiceUpdated

How to run Nimbus local testnet with Geth

• Check out branch kiln
• Run (and keep running) ./scripts/run-catalyst.sh.
• Run ./scripts/launch_local_testnet.sh --preset minimal --nodes 4 --disable-htop --stop-at-epoch 7 -- --verify-finalization --discv5:no

This creates a 4-node local testnet with 128 validators.

The Nimbus console output will be similar to The broken pipe on tail is normal, and unrelated to merge aspects of Nimbus.

Meanwhile, Nimbus is interacting with Geth in preparing, getting, and executing payloads: