Etan Kissling

Adds the `--trust-sync-committee` launch option to use the light client sync protocol for obtaining the latest finalized head. Then, instead of regularly syncing forward, sync backwards to skip most block...

consistent peer scoring for missing non-finalized parent

7

When the sync queue processes results for a blocks by range request, and the requested range contained some slots that are already finalized, `BlockError.MissingParent` currently leads to `PeerScoreBadBlocks` even when...

Invalid codegen when `block` ends with `lent`

4

When a `block` ends with an inlined call to a `lent` returning function, C code exhibiting a use-after-free bug is generated. ### Example `test.nim` ```nim type Foo = object a,...

`nim-websock` suffered from a number of issues that are being addressed: 1. Long messages > `frameSize` (default 1 MB) were split into fragments of `frameSize` each. However, when a concurrent...

various REST serialization cleanups

1

- delete unused version constants - move `EpochParticipationFlags` serialization to other serializers - move `JustificationBits` serialization after base types - add `eth-consensus-version` for JSON in uniform way - add `sszResponsePlain`...

**Describe the bug** On `testing-large-01.aws-eu-central-1a.nimbus.prater`, the Nimbus beacon node entered a restart loop and crashes on start: ``` {"lvl":"INF","ts":"2022-08-11 10:14:13.534+00:00","msg":"Loading block DAG from database","topics":"beacnde","path":"/data/beacon-node-prater-testing/data/db"} /data/beacon-node-prater-testing/repo/vendor/nim-libp2p/libp2p/stream/bufferstream.nim(456) main /data/beacon-node-prater-testing/repo/vendor/nim-libp2p/libp2p/stream/bufferstream.nim(449) NimMain /data/beacon-node-prater-testing/repo/beacon_chain/nimbus_beacon_node.nim(2177) main...

`NoVerifyServerName` disables sending SNI

1

When `TLSFlags.NoVerifyServerName` is specified, in `tlsstream.nim`, BearSSL is configured with `sslClientReset(res.ccontext, "", 0)`. While this disables server name verification, it also disables sending SNI, leading to connection failure when connecting...

`Taskpool.new()` is marked as `{.raises: [Exception].}`. Catch this.

add metric for database checkpoint duration

1

Database checkpointing can take seconds, e.g., while Geth is syncing. Add a debug log + metric for it, and also info log if it takes longer than 250ms, same as...

With low peers (< 10), sync manager may get stuck in with workers map full of 'w'/'Q'

7

1. Each sync worker gets their job, slots 0 ..< 16, 16 ..< 32, 32 ..< 48 and so on 2. Assume num available peers < `SyncWorkersCount - 1` -->...