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fix docs about --builder (#4754)

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Align the document with the [implementation](2841f60686/beacon_node/execution_layer/src/lib.rs (L740)) regarding the `--builder` flag.


The `tokio::join!` macro takes a list of async expressions and evaluates them concurrently on the same task.
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zhiqiangxu 2023-10-26 05:23:50 +00:00
parent ba891e1fed
commit b82d1a993c
1 changed files with 1 additions and 3 deletions
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book/src/builders.md
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@ -21,9 +21,7 @@ The beacon node and validator client each require a new flag for lighthouse to b
```
lighthouse bn --builder https://mainnet-builder.test
```
The `--builder` flag will cause the beacon node to query the provided URL during block production for a block
payload with stubbed-out transactions. If this request fails, Lighthouse will fall back to the local
execution engine and produce a block using transactions gathered and verified locally.
The `--builder` flag will cause the beacon node to simultaneously query the provided URL and the local execution engine during block production for a block payload with stubbed-out transactions. If either fails, the successful result will be used; If both succeed, the more profitable result will be used.
The beacon node will *only* query for this type of block (a "blinded" block) when a validator specifically requests it.
Otherwise, it will continue to serve full blocks as normal. In order to configure the validator client to query for