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// Copyright (c) 2023 MASSA LABS <info@massa.net>
use crate::error::{match_for_io_error, GrpcError};
use crate::server::MassaPublicGrpc;
use futures_util::StreamExt;
use massa_models::block::{BlockDeserializer, BlockDeserializerArgs, SecureShareBlock};
use massa_models::error::ModelsError;
use massa_models::secure_share::SecureShareDeserializer;
use massa_proto_rs::massa::api::v1 as grpc_api;
use massa_serialization::{DeserializeError, Deserializer};
use std::io::ErrorKind;
use std::pin::Pin;
use tokio::sync::mpsc::Sender;
use tonic::Request;
use tracing::{error, warn};
/// Type declaration for SendBlockStream
pub type SendBlocksStreamType = Pin<
Box<
dyn futures_util::Stream<Item = Result<grpc_api::SendBlocksResponse, tonic::Status>>
+ Send
+ 'static,
>,
>;
/// This function takes a streaming request of block messages,
/// verifies, saves and propagates the block received in each message, and sends back a stream of
/// block id messages
#[allow(dead_code)]
pub(crate) async fn send_blocks(
grpc: &MassaPublicGrpc,
request: Request<tonic::Streaming<grpc_api::SendBlocksRequest>>,
) -> Result<SendBlocksStreamType, GrpcError> {
let consensus_controller = grpc.consensus_controller.clone();
let protocol_command_sender = grpc.protocol_controller.clone();
let config = grpc.grpc_config.clone();
let storage = grpc.storage.clone_without_refs();
// Create a channel to handle communication with the client
let (tx, rx) = tokio::sync::mpsc::channel(config.max_channel_size);
// Extract the incoming stream of block messages
let mut in_stream = request.into_inner();
// Spawn a task that reads incoming messages and processes the block in each message
tokio::spawn(async move {
while let Some(result) = in_stream.next().await {
match result {
Ok(req_content) => {
if req_content.block.is_empty() {
report_error(
tx.clone(),
tonic::Code::InvalidArgument,
"the request payload is empty".to_owned(),
)
.await;
continue;
};
// Create a block deserializer arguments
let args = BlockDeserializerArgs {
thread_count: config.thread_count,
max_operations_per_block: config.max_operations_per_block,
endorsement_count: config.endorsement_count,
max_denunciations_per_block_header: config
.max_denunciations_per_block_header,
last_start_period: Some(config.last_start_period),
chain_id: config.chain_id,
};
// Deserialize and verify received block in the incoming message
match SecureShareDeserializer::new(
BlockDeserializer::new(args),
config.chain_id,
)
.deserialize::<DeserializeError>(&req_content.block)
{
Ok(tuple) => {
let (rest, res_block): (&[u8], SecureShareBlock) = tuple;
if !rest.is_empty() {
report_error(
tx.clone(),
tonic::Code::InvalidArgument,
"the request payload is too large".to_owned(),
)
.await;
continue;
}
if let Err(e) = res_block
.verify_signature()
.and_then(|_| res_block.content.header.verify_signature())
.map(|_| {
res_block
.content
.header
.content
.endorsements
.iter()
.map(|endorsement| endorsement.verify_signature())
.collect::<Vec<Result<(), ModelsError>>>()
})
{
report_error(
tx.clone(),
tonic::Code::InvalidArgument,
format!("wrong signature: {}", e),
)
.await;
continue;
}
let block_id = res_block.id;
let slot = res_block.content.header.content.slot;
let mut block_storage = storage.clone_without_refs();
// Add the received block to the graph
block_storage.store_block(res_block.clone());
consensus_controller.register_block(
block_id,
slot,
block_storage.clone(),
false,
);
// Propagate the block(header) to the network
if let Err(e) =
protocol_command_sender.integrated_block(block_id, block_storage)
{
// If propagation failed, send an error message back to the client
report_error(
tx.clone(),
tonic::Code::Internal,
format!("failed to propagate block: {}", e),
)
.await;
continue;
};
// Send the response message back to the client
if let Err(e) = tx
.send(Ok(grpc_api::SendBlocksResponse {
result: Some(grpc_api::send_blocks_response::Result::BlockId(
res_block.id.to_string(),
)),
}))
.await
{
error!("failed to send back block response: {}", e);
};
}
// If the verification failed, send an error message back to the client
Err(e) => {
report_error(
tx.clone(),
tonic::Code::InvalidArgument,
format!("failed to deserialize block: {}", e),
)
.await;
continue;
}
};
}
// Handle any errors that may occur during receiving the data
Err(err) => {
// Check if the error matches any IO errors
if let Some(io_err) = match_for_io_error(&err) {
if io_err.kind() == ErrorKind::BrokenPipe {
warn!("client disconnected, broken pipe: {}", io_err);
break;
}
}
error!("{}", err);
// Send the error response back to the client
if let Err(e) = tx.send(Err(err)).await {
error!("failed to send back send_blocks error response: {}", e);
break;
}
}
}
}
});
let out_stream = tokio_stream::wrappers::ReceiverStream::new(rx);
Ok(Box::pin(out_stream) as SendBlocksStreamType)
}
/// This function reports an error to the sender by sending a gRPC response message to the client
async fn report_error(
sender: Sender<Result<grpc_api::SendBlocksResponse, tonic::Status>>,
code: tonic::Code,
error: String,
) {
error!("{}", error);
// Attempt to send the error response message to the sender
if let Err(e) = sender
.send(Ok(grpc_api::SendBlocksResponse {
result: Some(grpc_api::send_blocks_response::Result::Error(
massa_proto_rs::massa::model::v1::Error {
code: code.into(),
message: error,
},
)),
}))
.await
{
// If sending the message fails, log the error message
error!("failed to send back send_blocks error response: {}", e);
}
}