If so, please tell us more here:
Yes I am interested. I find playing with Ethereum ecosystem very exciting. What software I need to build my own builder ? I see lots of documentation around but I am more of a install the SW , roll up the sleeves and learn.
Hello @vishal. See here: GitHub - flashbots/boost-geth-builder: Example builder
You can ask your questions, if any, in that thread.
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Thank you.
In addition to our Goerli relay, we’ve now also opened block submissions on our Sepolia relay (where our relay delivers about 1 in 5 blocks).
Sepolia relay block submission endpoints:
-
getValidators: https://builder-relay-sepolia.flashbots.net/relay/v1/builder/validators (GET) - array of proposer preferences for registered validators with assigned duties in the current and next epoch -
submitBlock: https://builder-relay-sepolia.flashbots.net/relay/v1/builder/blocks (POST)
Goerli relay block submission endpoints:
-
getValidators: https://builder-relay-goerli.flashbots.net/relay/v1/builder/validators (GET) - array of proposer preferences for registered validators with assigned duties in the current and next epoch -
submitBlock: https://builder-relay-goerli.flashbots.net/relay/v1/builder/blocks (POST)
See also:
Note: Submissions are currently rate-limited to 60 requests / minute / IP address.
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Btw, the Flashbots mainnet relay will also allow external builder submissions from the get-go (the merge), in the same way as our testnet relays.
Mainnet relay block submission endpoints:
-
getValidators: https://boost-relay.flashbots.net/relay/v1/builder/validators (GET) - array of proposer preferences for registered validators with assigned duties in the current and next epoch -
submitBlock: https://boost-relay.flashbots.net/relay/v1/builder/blocks (POST)
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Are you triggering the block production? You will need to run the custom Prysm fork from GitHub - flashbots/prysm: Our custom Prysm fork for boost relay and builder CL. Sends payload attributes for block building on every slot to trigger building.
I ran the flashbot prysm program, but it still did not appear in the build block
This is my start command
@grust - let’s move to Issues · flashbots/boost-geth-builder · GitHub
Please attach your logs there!
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ok，Submitted
For reference - geth builder doesn't seem to work · Issue #29 · flashbots/boost-geth-builder · GitHub
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I am toying around with a builder at the moment. I like to have my blocks / bundles saved into a DB for analyzing the behaviour a bit better than just with the logs…
I can see in the docs that this is supposed to be possible with the builder by using flashbotsextra.IDatabaseService.
however I am not sure what kind of a database am I supposed to deploy and how to configure builder-geth to use it?
any pointers here please?
You need a Postgres database, and configure the DSN via the FLASHBOTS_POSTGRES_DSN environment variable:
- builder/service.go at 586fbec873e3ec9952f8aa185fa5942b4346efde · flashbots/builder · GitHub
- builder/database.go at main · flashbots/builder · GitHub
You can spin up such a database with Docker like this:
docker run -d -p 5432:5432 -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=postgres postgres
then you’d set the environment variable like this:
export FLASHBOTS_POSTGRES_DSN="postgres://postgres:postgres@localhost:5432/postgres?sslmode=disable"
Thanks a bunch! this is really helpful. I would assume that I`ll have to create the db schema manually? cheers
Oh yeah, seems that the schema is not yet in there.
For now, you’d have to reconstruct the two tables (built_blocks and bundles) based on the types and tests. If you manage to get it done, a PR would be nice! 
Definitely! Will have to clean up my script first as I am not super experienced with postgres. (understatement) 
Btw how exactly will these two tables be populated? Do I need to enable local relay for saving the built blocks? Which process is responsible for saving the incoming bundles into postgres? cheers