* Chunked format -> blinded
* LZ4 -> ZSTD
* Implemented parent block root support for history download
* Rationale: Allows to optimize GC collection easily on state
reconstruction and it allows to read fast attestations in historical
states reader
"whitelisting" mechanism (list of files - stored in DB) - which
protecting us from downloading new files after upgrade/downgrade was
broken. And seems it became over-complicated with time.
I replacing it by 1 persistent flag inside downloader:
"prohibit_new_downloads.lock"
Erigon will turn downloader into this mode after
downloading/verification of first snapshots.
```
//Corner cases:
// - Erigon generated file X with hash H1. User upgraded Erigon. New version has preverified file X with hash H2. Must ignore H2 (don't send to Downloader)
// - Erigon "download once": means restart/upgrade/downgrade must not download files (and will be fast)
// - After "download once" - Erigon will produce and seed new files
```
------
`downloader --seedbox` is never "prohibit new downloads"
# Background
Erigon currently uses a combination of Victoria Metrics and Prometheus
client for providing metrics.
We want to rationalize this and use only the Prometheus client library,
but we want to maintain the simplified Victoria Metrics methods for
constructing metrics.
This task is currently partly complete and needs to be finished to a
stage where we can remove the Victoria Metrics module from the Erigon
code base.
# Summary of changes
- Remove `UsePrometheusClient` boolean flag
- Remove `VictoriaMetrics` client lib and related code (simplifies
registry and prometheus http handler initialisation since now we have
only 1 registry and can use default `promhttp.Handler`)
Reason:
- produce and seed snapshots earlier on chain tip. reduce depnedency on
"good peers with history" at p2p-network.
Some networks have no much archive peers, also ConsensusLayer clients
are not-good(not-incentivised) at serving history.
- avoiding having too much files:
more files(shards) - means "more metadata", "more lookups for
non-indexed queries", "more dictionaries", "more bittorrent
connections", ...
less files - means small files will be removed after merge (no peers for
this files).
ToDo:
[x] Recent 500K - merge up to 100K
[x] Older than 500K - merge up to 500K
[x] Start seeding 100k files
[x] Stop seeding 100k files after merge (right before delete)
In next PR:
[] Old version of Erigon must be able download recent hashes. To achieve
it - at first start erigon will download preverified hashes .toml from
s3 - if it's newer that what we have (build-in) - use it.
This introduces _experimental_ RPC daemon run by embedded Silkworm
library. Same notes as in PR #8353 apply here plus the following ones:
- activated if `http` command-line option is enabled and `silkworm.path`
option is present, nothing more is required (i.e. currently, both block
execution and RPC daemon run by Silkworm when specifying
`silkworm.path`, just to keep things as simple as possible)
- only Execution API endpoints are implemented by Silkworm RPCDaemon,
whilst Engine API endpoints are still served by Erigon RPCDaemon
- some features are still missing, in particular:
- state change notification handling
- custom JSON RPC settings (i.e. Erigon RPC settings are not passed to
Silkworm yet)
Bumps [golang.org/x/net](https://github.com/golang/net) from 0.15.0 to
0.17.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="b225e7ca6d"><code>b225e7c</code></a>
http2: limit maximum handler goroutines to MaxConcurrentStreams</li>
<li><a
href="88194ad8ab"><code>88194ad</code></a>
go.mod: update golang.org/x dependencies</li>
<li><a
href="2b60a61f1e"><code>2b60a61</code></a>
quic: fix several bugs in flow control accounting</li>
<li><a
href="73d82efb96"><code>73d82ef</code></a>
quic: handle DATA_BLOCKED frames</li>
<li><a
href="5d5a036a50"><code>5d5a036</code></a>
quic: handle streams moving from the data queue to the meta queue</li>
<li><a
href="350aad2603"><code>350aad2</code></a>
quic: correctly extend peer's flow control window after MAX_DATA</li>
<li><a
href="21814e71db"><code>21814e7</code></a>
quic: validate connection id transport parameters</li>
<li><a
href="a600b3518e"><code>a600b35</code></a>
quic: avoid redundant MAX_DATA updates</li>
<li><a
href="ea633599b5"><code>ea63359</code></a>
http2: check stream body is present on read timeout</li>
<li><a
href="ddd8598e56"><code>ddd8598</code></a>
quic: version negotiation</li>
<li>Additional commits viewable in <a
href="https://github.com/golang/net/compare/v0.15.0...v0.17.0">compare
view</a></li>
</ul>
</details>
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