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docs: mention jwt is in datadir (#3274)

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2023-06-20 18:16:42 +02:00
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book/run/mainnet.md
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@ -16,7 +16,7 @@ RUST_LOG=info reth node
> Note that this command will not open any HTTP/WS ports by default. You can change this by adding the `--http`, `--ws` flags, respectively and using the `--http.api` and `--ws.api` flags to enable various [JSON-RPC APIs](../jsonrpc/intro.md). For more commands, see the [`reth node` CLI reference](../cli/node.md).
The EL <> CL communication happens over the [Engine API](https://github.com/ethereum/execution-apis/blob/main/src/engine/common.md), which is by default exposed at `http://localhost:8551`. The connection is authenticated over JWT using a JWT secret which is auto-generated by Reth under `~/.local/share/reth/mainnet/jwt.hex` in Linux (`/Users/<NAME>/Library/Application Support/reth/mainnet/jwt.hex` in Mac).
The EL <> CL communication happens over the [Engine API](https://github.com/ethereum/execution-apis/blob/main/src/engine/common.md), which is by default exposed at `http://localhost:8551`. The connection is authenticated over JWT using a JWT secret which is auto-generated by Reth and placed in a file called `jwt.hex` in the data directory, which on Linux by default is `$HOME/.local/share/reth/` (`/Users/<NAME>/Library/Application Support/reth/mainnet/jwt.hex` in Mac).
You can override this path using the `--authrpc.jwtsecret` option. You MUST use the same JWT secret in BOTH Reth and the chosen Consensus Layer. If you want to override the address or port, you can use the `--authrpc.addr` and `--authrpc.port` options, respectively.