Beacon block sync (paritytech#623)

* Start working on beacon block sync

* Progress on beacon block verification

* Beacon block verification

* Block proof progress

* Updates ssz_rs version with transactions panic fix.

* Use tested individual merkleization functions in beacon block proof

* Beacon block proof works

* Beacon block with transactions and attester slashing also works

* Pins byte-slice-cast version, checks rust version

* remove ssz_rs rev

* Tries updating Rust version

* Updates ssz-rs name and version

* Updates ssz-rs version

* Updates ssz-rs-derive too

* Moves Beacon structs into primitives

* Adds new beacon primitive files

* Fixes no-std issues.

* Cleanup and refactor.

* More cleanup

* PR comments

* Merged main

Co-authored-by: claravanstaden <Cats 4 life!>

parachain/pallets/ethereum-beacon-client/Cargo.toml

@@ -15,8 +15,9 @@ serde = { version = "1.0.136", optional = true }
 codec = { version = "3.0.0", package = "parity-scale-codec", default-features = false, features = ["derive"] }
 scale-info = { version = "2.0.1", default-features = false, features = ["derive"] }
 milagro_bls = { git = "https://github.com/Snowfork/milagro_bls", default-features = false }
-ssz_rs = { git = "https://github.com/Snowfork/ssz_rs", default-features = false }
-ssz_rs_derive = { git = "https://github.com/Snowfork/ssz_rs", default-features = false }
+ssz-rs = { git = "https://github.com/Snowfork/ssz_rs", default-features = false, rev="8d497a949c320577aa1f741eb9f2958191df905b" }
+ssz-rs-derive = { git = "https://github.com/Snowfork/ssz_rs", default-features = false, rev="8d497a949c320577aa1f741eb9f2958191df905b" }
+byte-slice-cast = { version = "1.2.1", default-features = false }
 
 frame-benchmarking = { git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.19", default-features = false, optional = true }
 frame-support = { git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.19", default-features = false }
@@ -28,6 +29,7 @@ sp-runtime = { git = "https://github.com/paritytech/substrate.git", branch = "po
 
 snowbridge-core = { path = "../../primitives/core", default-features = false }
 snowbridge-ethereum = { path = "../../primitives/ethereum", default-features = false }
+snowbridge-beacon = { path = "../../primitives/beacon", default-features = false }
 
 [dev-dependencies]
 sp-keyring = { git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.19" }
@@ -49,8 +51,10 @@ std = [
     "sp-std/std",
     "snowbridge-core/std",
     "snowbridge-ethereum/std",
+    "snowbridge-beacon/std",
     "milagro_bls/std",
-    "ssz_rs/std",
+    "ssz-rs/std",
+    "byte-slice-cast/std"
 ]
 runtime-benchmarks = [
     "frame-benchmarking",

parachain/pallets/ethereum-beacon-client/src/config.rs

@@ -0,0 +1,21 @@
+pub const MAX_PROPOSER_SLASHINGS: usize = 16;
+
+pub const MAX_ATTESTER_SLASHINGS: usize =  2;
+
+pub const MAX_ATTESTATIONS: usize =  128;
+
+pub const MAX_DEPOSITS: usize =  16;
+
+pub const MAX_VOLUNTARY_EXITS: usize =  16;
+
+pub const MAX_VALIDATORS_PER_COMMITTEE: usize = 2048;
+
+pub const DEPOSIT_CONTRACT_TREE_DEPTH: usize = 32;
+
+pub const MAX_BYTES_PER_TRANSACTION: usize = 1073741824;
+
+pub const MAX_TRANSACTIONS_PER_PAYLOAD: usize = 1048576;
+
+pub const MAX_EXTRA_DATA_BYTES: usize = 32;
+
+pub const SYNC_COMMITTEE_SIZE: usize = 512;