5.1 User Submits A Transaction

This color means execution client.

For proposer node:

3.5 Code - Lodestar - Block Building > Send Gossip Topic `beacon_block` or `beacon_block_and_blobs_sidecar`

3.5 Code - Lodestar - Block Building > Receive Gossip Topic `beacon_block` or `beacon_block_and_blobs_sidecar`

For non-proposer nodes:

Reads transaction pool

sync

3.4 Code - Lodestar - Attestation

4.3 Code - Geth - Transaction Pool > Receiving A Transaction from A Wallet through JSON-RPC

4.3 Code - Geth - Transaction Pool > Tell The Transaction to (More) Peers

4.4 Code - Geth - Block Building > Fork Choice Handling

4.4 Code - Geth - Block Building > Block Execution

4.4 Code - Geth - Block Building > New Payload Handling

This color means consensus client.

4.2 Code - Geth - JSON-RPC > Make A Transaction from Wallet