[Application Development] Any visual tool to see the latest safe, unsafe, finality L2 blocks?

[boundless-forest]

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Issue Description

I would like to know if there are any tools that are available to see the latest safe, unsafe and finalized rollup block height for the Op Stack chains. I have checked the https://optimistic.etherscan.io/, and no luck, no such information. I guess this data can be retrieved via the sdk or something else. Can you give me some suggestioins?

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[opfocus]

https://docs.alchemy.com/reference/eth-getblocktransactioncountbynumber-optimism please check this，
The document mentions some monitoring metrics for the node at https://docs.optimism.io/builders/node-operators/management/metrics.

[sbvegan]

This is a good option, you can utilize prometheus + grafana to create a dashboard for your own node. It could look something like this:

[norswap]

Go your op-node logs and look for lines that look like this:

t=2023-12-28T18:28:58+0100 lvl=info msg="Sync progress"                          reason="reconciled with L1"    l2_finalized=0x18b4dff8b33b2738d43f26050152d94259bf506fbadc6d4307b8ad5c05cd7d2e:0 l2_safe=0x8e2053e507519fc8f99ed67f53ce3341b423e8cdb347969449003d826e607bfb:1 l2_unsafe=0x86ed8cbca524eec540cac62966b1724eb42f9a256ddee570a86da6c7dc6b7c34:72 l2_engineSyncTarget=0x86ed8cbca524eec540cac62966b1724eb42f9a256ddee570a86da6c7dc6b7c34:72 l2_time=1,703,784,538 l1_derived=0x16e00c42de9c04378ca377028289b34e7baa13815147aa1e9cc044b75916eb52:9

That gives you the block hashes and block heights of all the heads.

You could build a script that parses this data as it comes in and visualizes it.

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