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Ethereum 2.0 Network Specification Upgrade (#510)

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Updates lighthouse to the latest networking spec

-  Sync re-write (#496)
-  Updates to the latest eth2 networking spec (#495)
-  Libp2p updates and improvements
This commit is contained in:
Age Manning
2019-08-29 13:23:28 +02:00
committed by GitHub
parent bcffe42712
commit 192380cb58
22 changed files with 1414 additions and 1523 deletions
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134
beacon_node/eth2-libp2p/src/rpc/codec/ssz.rs
View File

@@ -41,10 +41,8 @@ impl Encoder for SSZInboundCodec {
RPCErrorResponse::Success(resp) => {
match resp {
RPCResponse::Hello(res) => res.as_ssz_bytes(),
RPCResponse::BeaconBlockRoots(res) => res.as_ssz_bytes(),
RPCResponse::BeaconBlockHeaders(res) => res.headers, // already raw bytes
RPCResponse::BeaconBlockBodies(res) => res.block_bodies, // already raw bytes
RPCResponse::BeaconChainState(res) => res.as_ssz_bytes(),
RPCResponse::BeaconBlocks(res) => res, // already raw bytes
RPCResponse::RecentBeaconBlocks(res) => res, // already raw bytes
}
}
RPCErrorResponse::InvalidRequest(err) => err.as_ssz_bytes(),
@@ -72,52 +70,30 @@ impl Decoder for SSZInboundCodec {
match self.inner.decode(src).map_err(RPCError::from) {
Ok(Some(packet)) => match self.protocol.message_name.as_str() {
"hello" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::Hello(HelloMessage::from_ssz_bytes(
"1" => Ok(Some(RPCRequest::Hello(HelloMessage::from_ssz_bytes(
&packet,
)?))),
_ => Err(RPCError::InvalidProtocol("Unknown HELLO version")),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"goodbye" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::Goodbye(GoodbyeReason::from_ssz_bytes(
"1" => Ok(Some(RPCRequest::Goodbye(GoodbyeReason::from_ssz_bytes(
&packet,
)?))),
_ => Err(RPCError::InvalidProtocol(
"Unknown GOODBYE version.as_str()",
)),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"beacon_block_roots" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::BeaconBlockRoots(
BeaconBlockRootsRequest::from_ssz_bytes(&packet)?,
"beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCRequest::BeaconBlocks(
BeaconBlocksRequest::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_ROOTS version.",
)),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"beacon_block_headers" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::BeaconBlockHeaders(
BeaconBlockHeadersRequest::from_ssz_bytes(&packet)?,
"recent_beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCRequest::RecentBeaconBlocks(
RecentBeaconBlocksRequest::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_HEADERS version.",
)),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"beacon_block_bodies" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::BeaconBlockBodies(
BeaconBlockBodiesRequest::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_BODIES version.",
)),
},
"beacon_chain_state" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCRequest::BeaconChainState(
BeaconChainStateRequest::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_CHAIN_STATE version.",
)),
},
_ => Err(RPCError::InvalidProtocol("Unknown message name.")),
_ => unreachable!("Cannot negotiate an unknown protocol"),
},
Ok(None) => Ok(None),
Err(e) => Err(e),
@@ -156,10 +132,8 @@ impl Encoder for SSZOutboundCodec {
let bytes = match item {
RPCRequest::Hello(req) => req.as_ssz_bytes(),
RPCRequest::Goodbye(req) => req.as_ssz_bytes(),
RPCRequest::BeaconBlockRoots(req) => req.as_ssz_bytes(),
RPCRequest::BeaconBlockHeaders(req) => req.as_ssz_bytes(),
RPCRequest::BeaconBlockBodies(req) => req.as_ssz_bytes(),
RPCRequest::BeaconChainState(req) => req.as_ssz_bytes(),
RPCRequest::BeaconBlocks(req) => req.as_ssz_bytes(),
RPCRequest::RecentBeaconBlocks(req) => req.as_ssz_bytes(),
};
// length-prefix
self.inner
@@ -168,7 +142,11 @@ impl Encoder for SSZOutboundCodec {
}
}
// Decoder for outbound
// Decoder for outbound streams
//
// The majority of the decoding has now been pushed upstream due to the changing specification.
// We prefer to decode blocks and attestations with extra knowledge about the chain to perform
// faster verification checks before decoding entire blocks/attestations.
impl Decoder for SSZOutboundCodec {
type Item = RPCResponse;
type Error = RPCError;
@@ -177,53 +155,41 @@ impl Decoder for SSZOutboundCodec {
match self.inner.decode(src).map_err(RPCError::from) {
Ok(Some(packet)) => match self.protocol.message_name.as_str() {
"hello" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCResponse::Hello(HelloMessage::from_ssz_bytes(
"1" => Ok(Some(RPCResponse::Hello(HelloMessage::from_ssz_bytes(
&packet,
)?))),
_ => Err(RPCError::InvalidProtocol("Unknown HELLO version.")),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"goodbye" => Err(RPCError::InvalidProtocol("GOODBYE doesn't have a response")),
"beacon_block_roots" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCResponse::BeaconBlockRoots(
BeaconBlockRootsResponse::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_ROOTS version.",
)),
"beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCResponse::BeaconBlocks(packet.to_vec()))),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"beacon_block_headers" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCResponse::BeaconBlockHeaders(
BeaconBlockHeadersResponse {
headers: packet.to_vec(),
},
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_HEADERS version.",
)),
"recent_beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCResponse::RecentBeaconBlocks(packet.to_vec()))),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"beacon_block_bodies" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCResponse::BeaconBlockBodies(
BeaconBlockBodiesResponse {
block_bodies: packet.to_vec(),
// this gets filled in the protocol handler
block_roots: None,
},
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_BLOCK_BODIES version.",
)),
},
"beacon_chain_state" => match self.protocol.version.as_str() {
"1.0.0" => Ok(Some(RPCResponse::BeaconChainState(
BeaconChainStateResponse::from_ssz_bytes(&packet)?,
))),
_ => Err(RPCError::InvalidProtocol(
"Unknown BEACON_CHAIN_STATE version.",
)),
},
_ => Err(RPCError::InvalidProtocol("Unknown method")),
_ => unreachable!("Cannot negotiate an unknown protocol"),
},
Ok(None) => Ok(None),
Ok(None) => {
// the object sent could be a empty. We return the empty object if this is the case
match self.protocol.message_name.as_str() {
"hello" => match self.protocol.version.as_str() {
"1" => Ok(None), // cannot have an empty HELLO message. The stream has terminated unexpectedly
_ => unreachable!("Cannot negotiate an unknown version"),
},
"goodbye" => Err(RPCError::InvalidProtocol("GOODBYE doesn't have a response")),
"beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCResponse::BeaconBlocks(Vec::new()))),
_ => unreachable!("Cannot negotiate an unknown version"),
},
"recent_beacon_blocks" => match self.protocol.version.as_str() {
"1" => Ok(Some(RPCResponse::RecentBeaconBlocks(Vec::new()))),
_ => unreachable!("Cannot negotiate an unknown version"),
},
_ => unreachable!("Cannot negotiate an unknown protocol"),
}
}
Err(e) => Err(e),
}
}

40
beacon_node/eth2-libp2p/src/rpc/handler.rs
View File

@@ -1,4 +1,4 @@
use super::methods::{RPCErrorResponse, RPCResponse, RequestId};
use super::methods::RequestId;
use super::protocol::{RPCError, RPCProtocol, RPCRequest};
use super::RPCEvent;
use crate::rpc::protocol::{InboundFramed, OutboundFramed};
@@ -13,8 +13,8 @@ use smallvec::SmallVec;
use std::time::{Duration, Instant};
use tokio_io::{AsyncRead, AsyncWrite};
/// The time (in seconds) before a substream that is awaiting a response times out.
pub const RESPONSE_TIMEOUT: u64 = 9;
/// The time (in seconds) before a substream that is awaiting a response from the user times out.
pub const RESPONSE_TIMEOUT: u64 = 10;
/// Implementation of `ProtocolsHandler` for the RPC protocol.
pub struct RPCHandler<TSubstream>
@@ -314,14 +314,14 @@ where
Ok(Async::Ready(response)) => {
if let Some(response) = response {
return Ok(Async::Ready(ProtocolsHandlerEvent::Custom(
build_response(rpc_event, response),
RPCEvent::Response(rpc_event.id(), response),
)));
} else {
// stream closed early
// stream closed early or nothing was sent
return Ok(Async::Ready(ProtocolsHandlerEvent::Custom(
RPCEvent::Error(
rpc_event.id(),
RPCError::Custom("Stream Closed Early".into()),
RPCError::Custom("Stream closed early. Empty response".into()),
),
)));
}
@@ -365,31 +365,3 @@ where
Ok(Async::NotReady)
}
}
/// Given a response back from a peer and the request that sent it, construct a response to send
/// back to the user. This allows for some data manipulation of responses given requests.
fn build_response(rpc_event: RPCEvent, rpc_response: RPCErrorResponse) -> RPCEvent {
let id = rpc_event.id();
// handle the types of responses
match rpc_response {
RPCErrorResponse::Success(response) => {
match response {
// if the response is block roots, tag on the extra request data
RPCResponse::BeaconBlockBodies(mut resp) => {
if let RPCEvent::Request(_id, RPCRequest::BeaconBlockBodies(bodies_req)) =
rpc_event
{
resp.block_roots = Some(bodies_req.block_roots);
}
RPCEvent::Response(
id,
RPCErrorResponse::Success(RPCResponse::BeaconBlockBodies(resp)),
)
}
_ => RPCEvent::Response(id, RPCErrorResponse::Success(response)),
}
}
_ => RPCEvent::Response(id, rpc_response),
}
}

150
beacon_node/eth2-libp2p/src/rpc/methods.rs
View File

@@ -2,7 +2,7 @@
use ssz::{impl_decode_via_from, impl_encode_via_from};
use ssz_derive::{Decode, Encode};
use types::{BeaconBlockBody, Epoch, EthSpec, Hash256, Slot};
use types::{Epoch, Hash256, Slot};
/* Request/Response data structures for RPC methods */
@@ -13,23 +13,20 @@ pub type RequestId = usize;
/// The HELLO request/response handshake message.
#[derive(Encode, Decode, Clone, Debug)]
pub struct HelloMessage {
/// The network ID of the peer.
pub network_id: u8,
/// The fork version of the chain we are broadcasting.
pub fork_version: [u8; 4],
/// The chain id for the HELLO request.
pub chain_id: u64,
/// Latest finalized root.
pub finalized_root: Hash256,
/// The peers last finalized root.
pub latest_finalized_root: Hash256,
/// Latest finalized epoch.
pub finalized_epoch: Epoch,
/// The peers last finalized epoch.
pub latest_finalized_epoch: Epoch,
/// The latest block root.
pub head_root: Hash256,
/// The peers last block root.
pub best_root: Hash256,
/// The peers last slot.
pub best_slot: Slot,
/// The slot associated with the latest block root.
pub head_slot: Slot,
}
/// The reason given for a `Goodbye` message.
@@ -74,108 +71,31 @@ impl_decode_via_from!(GoodbyeReason, u64);
/// Request a number of beacon block roots from a peer.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconBlockRootsRequest {
/// The starting slot of the requested blocks.
pub start_slot: Slot,
pub struct BeaconBlocksRequest {
/// The hash tree root of a block on the requested chain.
pub head_block_root: Hash256,
/// The starting slot to request blocks.
pub start_slot: u64,
/// The number of blocks from the start slot.
pub count: u64, // this must be less than 32768. //TODO: Enforce this in the lower layers
}
pub count: u64,
/// Response containing a number of beacon block roots from a peer.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconBlockRootsResponse {
/// List of requested blocks and associated slots.
pub roots: Vec<BlockRootSlot>,
}
/// Contains a block root and associated slot.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BlockRootSlot {
/// The block root.
pub block_root: Hash256,
/// The block slot.
pub slot: Slot,
}
/// The response of a beacon block roots request.
impl BeaconBlockRootsResponse {
/// Returns `true` if each `self.roots.slot[i]` is higher than the preceding `i`.
pub fn slots_are_ascending(&self) -> bool {
for window in self.roots.windows(2) {
if window[0].slot >= window[1].slot {
return false;
}
}
true
}
}
/// Request a number of beacon block headers from a peer.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconBlockHeadersRequest {
/// The starting header hash of the requested headers.
pub start_root: Hash256,
/// The starting slot of the requested headers.
pub start_slot: Slot,
/// The maximum number of headers than can be returned.
pub max_headers: u64,
/// The maximum number of slots to skip between blocks.
pub skip_slots: u64,
}
/// Response containing requested block headers.
#[derive(Clone, Debug, PartialEq)]
pub struct BeaconBlockHeadersResponse {
/// The list of ssz-encoded requested beacon block headers.
pub headers: Vec<u8>,
/// The step increment to receive blocks.
///
/// A value of 1 returns every block.
/// A value of 2 returns every second block.
/// A value of 3 returns every third block and so on.
pub step: u64,
}
/// Request a number of beacon block bodies from a peer.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconBlockBodiesRequest {
pub struct RecentBeaconBlocksRequest {
/// The list of beacon block bodies being requested.
pub block_roots: Vec<Hash256>,
}
/// Response containing the list of requested beacon block bodies.
#[derive(Clone, Debug, PartialEq)]
pub struct BeaconBlockBodiesResponse {
/// The list of hashes that were sent in the request and match these roots response. None when
/// sending outbound.
pub block_roots: Option<Vec<Hash256>>,
/// The list of ssz-encoded beacon block bodies being requested.
pub block_bodies: Vec<u8>,
}
/// The decoded version of `BeaconBlockBodiesResponse` which is expected in `SimpleSync`.
pub struct DecodedBeaconBlockBodiesResponse<E: EthSpec> {
/// The list of hashes sent in the request to get this response.
pub block_roots: Vec<Hash256>,
/// The valid decoded block bodies.
pub block_bodies: Vec<BeaconBlockBody<E>>,
}
/// Request values for tree hashes which yield a blocks `state_root`.
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconChainStateRequest {
/// The tree hashes that a value is requested for.
pub hashes: Vec<Hash256>,
}
/// Request values for tree hashes which yield a blocks `state_root`.
// Note: TBD
#[derive(Encode, Decode, Clone, Debug, PartialEq)]
pub struct BeaconChainStateResponse {
/// The values corresponding the to the requested tree hashes.
pub values: bool, //TBD - stubbed with encodable bool
}
/* RPC Handling and Grouping */
// Collection of enums and structs used by the Codecs to encode/decode RPC messages
@@ -183,14 +103,10 @@ pub struct BeaconChainStateResponse {
pub enum RPCResponse {
/// A HELLO message.
Hello(HelloMessage),
/// A response to a get BEACON_BLOCK_ROOTS request.
BeaconBlockRoots(BeaconBlockRootsResponse),
/// A response to a get BEACON_BLOCK_HEADERS request.
BeaconBlockHeaders(BeaconBlockHeadersResponse),
/// A response to a get BEACON_BLOCK_BODIES request.
BeaconBlockBodies(BeaconBlockBodiesResponse),
/// A response to a get BEACON_CHAIN_STATE request.
BeaconChainState(BeaconChainStateResponse),
/// A response to a get BEACON_BLOCKS request.
BeaconBlocks(Vec<u8>),
/// A response to a get RECENT_BEACON_BLOCKS request.
RecentBeaconBlocks(Vec<u8>),
}
#[derive(Debug)]
@@ -206,8 +122,8 @@ impl RPCErrorResponse {
pub fn as_u8(&self) -> u8 {
match self {
RPCErrorResponse::Success(_) => 0,
RPCErrorResponse::InvalidRequest(_) => 2,
RPCErrorResponse::ServerError(_) => 3,
RPCErrorResponse::InvalidRequest(_) => 1,
RPCErrorResponse::ServerError(_) => 2,
RPCErrorResponse::Unknown(_) => 255,
}
}
@@ -223,8 +139,8 @@ impl RPCErrorResponse {
/// Builds an RPCErrorResponse from a response code and an ErrorMessage
pub fn from_error(response_code: u8, err: ErrorMessage) -> Self {
match response_code {
2 => RPCErrorResponse::InvalidRequest(err),
3 => RPCErrorResponse::ServerError(err),
1 => RPCErrorResponse::InvalidRequest(err),
2 => RPCErrorResponse::ServerError(err),
_ => RPCErrorResponse::Unknown(err),
}
}

55
beacon_node/eth2-libp2p/src/rpc/protocol.rs
View File

@@ -16,13 +16,17 @@ use tokio::io::{AsyncRead, AsyncWrite};
use tokio::prelude::*;
use tokio::timer::timeout;
use tokio::util::FutureExt;
use tokio_io_timeout::TimeoutStream;
/// The maximum bytes that can be sent across the RPC.
const MAX_RPC_SIZE: usize = 4_194_304; // 4M
/// The protocol prefix the RPC protocol id.
const PROTOCOL_PREFIX: &str = "/eth2/beacon_node/rpc";
/// The number of seconds to wait for a request once a protocol has been established before the stream is terminated.
const REQUEST_TIMEOUT: u64 = 3;
const PROTOCOL_PREFIX: &str = "/eth2/beacon_chain/req";
/// Time allowed for the first byte of a request to arrive before we time out (Time To First Byte).
const TTFB_TIMEOUT: u64 = 5;
/// The number of seconds to wait for the first bytes of a request once a protocol has been
/// established before the stream is terminated.
const REQUEST_TIMEOUT: u64 = 15;
#[derive(Debug, Clone)]
pub struct RPCProtocol;
@@ -33,11 +37,10 @@ impl UpgradeInfo for RPCProtocol {
fn protocol_info(&self) -> Self::InfoIter {
vec![
ProtocolId::new("hello", "1.0.0", "ssz"),
ProtocolId::new("goodbye", "1.0.0", "ssz"),
ProtocolId::new("beacon_block_roots", "1.0.0", "ssz"),
ProtocolId::new("beacon_block_headers", "1.0.0", "ssz"),
ProtocolId::new("beacon_block_bodies", "1.0.0", "ssz"),
ProtocolId::new("hello", "1", "ssz"),
ProtocolId::new("goodbye", "1", "ssz"),
ProtocolId::new("beacon_blocks", "1", "ssz"),
ProtocolId::new("recent_beacon_blocks", "1", "ssz"),
]
}
}
@@ -87,7 +90,7 @@ impl ProtocolName for ProtocolId {
// handler to respond to once ready.
pub type InboundOutput<TSocket> = (RPCRequest, InboundFramed<TSocket>);
pub type InboundFramed<TSocket> = Framed<upgrade::Negotiated<TSocket>, InboundCodec>;
pub type InboundFramed<TSocket> = Framed<TimeoutStream<upgrade::Negotiated<TSocket>>, InboundCodec>;
type FnAndThen<TSocket> = fn(
(Option<RPCRequest>, InboundFramed<TSocket>),
) -> FutureResult<InboundOutput<TSocket>, RPCError>;
@@ -118,7 +121,9 @@ where
"ssz" | _ => {
let ssz_codec = BaseInboundCodec::new(SSZInboundCodec::new(protocol, MAX_RPC_SIZE));
let codec = InboundCodec::SSZ(ssz_codec);
Framed::new(socket, codec)
let mut timed_socket = TimeoutStream::new(socket);
timed_socket.set_read_timeout(Some(Duration::from_secs(TTFB_TIMEOUT)));
Framed::new(timed_socket, codec)
.into_future()
.timeout(Duration::from_secs(REQUEST_TIMEOUT))
.map_err(RPCError::from as FnMapErr<TSocket>)
@@ -144,10 +149,8 @@ where
pub enum RPCRequest {
Hello(HelloMessage),
Goodbye(GoodbyeReason),
BeaconBlockRoots(BeaconBlockRootsRequest),
BeaconBlockHeaders(BeaconBlockHeadersRequest),
BeaconBlockBodies(BeaconBlockBodiesRequest),
BeaconChainState(BeaconChainStateRequest),
BeaconBlocks(BeaconBlocksRequest),
RecentBeaconBlocks(RecentBeaconBlocksRequest),
}
impl UpgradeInfo for RPCRequest {
@@ -165,22 +168,11 @@ impl RPCRequest {
pub fn supported_protocols(&self) -> Vec<ProtocolId> {
match self {
// add more protocols when versions/encodings are supported
RPCRequest::Hello(_) => vec![
ProtocolId::new("hello", "1.0.0", "ssz"),
ProtocolId::new("goodbye", "1.0.0", "ssz"),
],
RPCRequest::Goodbye(_) => vec![ProtocolId::new("goodbye", "1.0.0", "ssz")],
RPCRequest::BeaconBlockRoots(_) => {
vec![ProtocolId::new("beacon_block_roots", "1.0.0", "ssz")]
}
RPCRequest::BeaconBlockHeaders(_) => {
vec![ProtocolId::new("beacon_block_headers", "1.0.0", "ssz")]
}
RPCRequest::BeaconBlockBodies(_) => {
vec![ProtocolId::new("beacon_block_bodies", "1.0.0", "ssz")]
}
RPCRequest::BeaconChainState(_) => {
vec![ProtocolId::new("beacon_block_state", "1.0.0", "ssz")]
RPCRequest::Hello(_) => vec![ProtocolId::new("hello", "1", "ssz")],
RPCRequest::Goodbye(_) => vec![ProtocolId::new("goodbye", "1", "ssz")],
RPCRequest::BeaconBlocks(_) => vec![ProtocolId::new("beacon_blocks", "1", "ssz")],
RPCRequest::RecentBeaconBlocks(_) => {
vec![ProtocolId::new("recent_beacon_blocks", "1", "ssz")]
}
}
}
@@ -215,7 +207,8 @@ where
) -> Self::Future {
match protocol.encoding.as_str() {
"ssz" | _ => {
let ssz_codec = BaseOutboundCodec::new(SSZOutboundCodec::new(protocol, 4096));
let ssz_codec =
BaseOutboundCodec::new(SSZOutboundCodec::new(protocol, MAX_RPC_SIZE));
let codec = OutboundCodec::SSZ(ssz_codec);
Framed::new(socket, codec).send(self)
}