james-prysm 4374e709cb fixing state replay caused by REST api duties attester and sync committee endpoints (#16136)
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**What type of PR is this?**

 Bug fix


**What does this PR do? Why is it needed?**

s.Stater.StateBySlot may replay if it's the current epoch as it's for
values in the db, if we are in the current we should try to get head
slot and use the cache, proposer duties was doing this already but the
other 2 duties endpoints was not. this pr aligns all 3 and introduces a
new `statebyepoch` that just wraps the approach.

I tested by running this kurtosis config with and without the fix to see
that the replays stop, the blockchain progresses, and the upgraded to
fulu is not printed multiple times

```
participants:
 # Super-nodes
 - el_type: nethermind
   cl_type: prysm
   cl_image: gcr.io/offchainlabs/prysm/beacon-chain:latest
   count: 2
   supernode: true
   cl_extra_params:
     - --subscribe-all-subnets
     - --verbosity=debug
   vc_extra_params:
     - --enable-beacon-rest-api
     - --verbosity=debug

 # Full-nodes
 - el_type: nethermind
   cl_type: prysm
   cl_image: gcr.io/offchainlabs/prysm/beacon-chain:latest
   validator_count: 63
   cl_extra_params:
     - --verbosity=debug
   vc_extra_params:
     - --enable-beacon-rest-api
     - --verbosity=debug

 - el_type: nethermind
   cl_type: prysm
   cl_image: gcr.io/offchainlabs/prysm/beacon-chain:latest
   cl_extra_params:
     - --verbosity=debug
   vc_extra_params:
     - --enable-beacon-rest-api
     - --verbosity=debug
   validator_count: 13

additional_services:
 - dora
 - spamoor

spamoor_params:
 image: ethpandaops/spamoor:master
 max_mem: 4000
 spammers:
   - scenario: eoatx
     config:
       throughput: 200
   - scenario: blobs
     config:
       throughput: 20

network_params:
  fulu_fork_epoch: 2
  bpo_1_epoch: 8
  bpo_1_max_blobs: 21
  withdrawal_type: "0x02"
  preset: mainnet
  seconds_per_slot: 6

global_log_level: debug
```

**Which issues(s) does this PR fix?**

Fixes # https://github.com/OffchainLabs/prysm/issues/16135

**Other notes for review**

**Acknowledgements**

- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [x] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description with sufficient context for reviewers
to understand this PR.
- [x] I have tested that my changes work as expected and I added a
testing plan to the PR description (if applicable).
2025-12-12 23:18:22 +00:00
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2025-11-06 16:16:23 +00:00
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2022-11-18 19:12:19 +00:00
2018-07-20 10:23:48 -05:00
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2023-10-19 12:23:11 +00:00
2025-05-28 01:57:44 +00:00

Prysm: An Ethereum Consensus Implementation Written in Go

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