feat: bodies stage (#190)

* chore: clean up `.gitignore`

* fix: make RO cursors `Send + Sync`

* feat(wip): bodies stage

* driveby: improve docs

* chore: don't panic if we're the first stage

* chore: use `Vec` for ommers

* feat: error handling in bodies downloader

* chore: remove stale comment

* chore: pascal-case stage id

* refactor: remove unused new fns

* refactor: distinguish downloaders with prefix

* refactor: move downloader errs to own module

* refactor: `stream_bodies` -> `bodies_stream`

* test: fix borked imports in header stage

* test: clean up header tests

* test: add basic body stage tests

* test: add 2 more body stage test skeletons

* test: move generator test utils to own module

* refactor: move proof functions to primitives crate

* feat: add block generator test utils

* test: more body stage tests

* chore: fix typo (`Cannonical*` -> `Canonical`)

* docs: document `bodies_to_download`

* test: more body stage tests

* test: more body stage tests

* refactor: clean up body stage tests a bit

* test: fix broken tests

* refactor: clean up body stage tests

* test: more body stage tests

Cargo.lock

@@ -3043,6 +3043,21 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "reth-bodies-downloaders"
+version = "0.1.0"
+dependencies = [
+ "assert_matches",
+ "futures-util",
+ "once_cell",
+ "rand 0.8.5",
+ "reth-eth-wire",
+ "reth-interfaces",
+ "reth-primitives",
+ "serial_test",
+ "tokio",
+]
+
 [[package]]
 name = "reth-codecs"
 version = "0.1.0"
@@ -3057,16 +3072,11 @@ dependencies = [
  "async-trait",
  "auto_impl",
  "eyre",
- "hash-db",
- "plain_hasher",
  "reth-interfaces",
  "reth-primitives",
  "reth-rlp",
- "rlp",
- "sha3",
  "thiserror",
  "tokio",
- "triehash",
 ]
 
 [[package]]
@@ -3225,6 +3235,7 @@ dependencies = [
  "rand 0.8.5",
  "reth-codecs",
  "reth-db",
+ "reth-eth-wire",
  "reth-primitives",
  "reth-rpc-types",
  "serde",
@@ -3332,10 +3343,12 @@ dependencies = [
  "crc",
  "derive_more",
  "ethers-core",
+ "hash-db",
  "hex",
  "hex-literal",
  "maplit",
  "parity-scale-codec",
+ "plain_hasher",
  "reth-codecs",
  "reth-rlp",
  "secp256k1",
@@ -3344,6 +3357,7 @@ dependencies = [
  "sucds",
  "thiserror",
  "tiny-keccak",
+ "triehash",
 ]
 
 [[package]]
@@ -3416,9 +3430,12 @@ dependencies = [
  "aquamarine",
  "assert_matches",
  "async-trait",
+ "futures-util",
  "metrics",
  "rand 0.8.5",
+ "reth-bodies-downloaders",
  "reth-db",
+ "reth-eth-wire",
  "reth-headers-downloaders",
  "reth-interfaces",
  "reth-primitives",