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use crate::{errors::JsonRpcError, request::RawJsonRpcRequest, Id, JsonRpcVersion};
use diem_types::event::EventKey;
use serde::{Deserialize, Serialize};
use std::str::FromStr;
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct StreamJsonRpcRequest {
jsonrpc: JsonRpcVersion,
#[serde(flatten)]
pub method_request: StreamMethodRequest,
pub id: Id,
}
impl StreamJsonRpcRequest {
pub fn new(method_request: StreamMethodRequest, id: Id) -> Self {
Self {
jsonrpc: JsonRpcVersion::V2,
method_request,
id,
}
}
fn finish_parsing(
jsonrpc: serde_json::Value,
method: serde_json::Value,
params: serde_json::Value,
id: Id,
) -> Result<Self, (JsonRpcError, Option<StreamMethod>, Option<Id>)> {
let jsonrpc: JsonRpcVersion = serde_json::from_value(jsonrpc)
.map_err(|_| (JsonRpcError::invalid_request(), None, Some(id.clone())))?;
let method: StreamMethod = serde_json::from_value(method)
.map_err(|_| (JsonRpcError::method_not_found(), None, Some(id.clone())))?;
let method_request = StreamMethodRequest::from_value(method, params).map_err(|_| {
(
JsonRpcError::invalid_params(method.as_str()),
Some(method),
Some(id.clone()),
)
})?;
Ok(StreamJsonRpcRequest {
jsonrpc,
method_request,
id,
})
}
pub fn method_name(&self) -> &'static str {
self.method_request.method_name()
}
}
impl FromStr for StreamJsonRpcRequest {
type Err = (JsonRpcError, Option<StreamMethod>, Option<Id>);
fn from_str(string: &str) -> Result<Self, (JsonRpcError, Option<StreamMethod>, Option<Id>)> {
let RawJsonRpcRequest {
jsonrpc,
method,
params,
id,
} = serde_json::from_str(string)
.map_err(|_| (JsonRpcError::invalid_format(), None, None))?;
StreamJsonRpcRequest::finish_parsing(jsonrpc, method, params, id)
}
}
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
#[serde(tag = "method", content = "params")]
pub enum StreamMethodRequest {
SubscribeToTransactions(SubscribeToTransactionsParams),
SubscribeToEvents(SubscribeToEventsParams),
Unsubscribe,
}
impl StreamMethodRequest {
pub fn method_name(&self) -> &'static str {
self.method().as_str()
}
pub fn from_value(
method: StreamMethod,
value: serde_json::Value,
) -> Result<Self, serde_json::Error> {
let method_request = match method {
StreamMethod::SubscribeToTransactions => {
StreamMethodRequest::SubscribeToTransactions(serde_json::from_value(value)?)
}
StreamMethod::SubscribeToEvents => {
StreamMethodRequest::SubscribeToEvents(serde_json::from_value(value)?)
}
StreamMethod::Unsubscribe => StreamMethodRequest::Unsubscribe,
};
Ok(method_request)
}
pub fn method(&self) -> StreamMethod {
match self {
StreamMethodRequest::SubscribeToTransactions(_) => {
StreamMethod::SubscribeToTransactions
}
StreamMethodRequest::SubscribeToEvents(_) => StreamMethod::SubscribeToEvents,
StreamMethodRequest::Unsubscribe => StreamMethod::Unsubscribe,
}
}
}
#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum StreamMethod {
SubscribeToTransactions,
SubscribeToEvents,
Unsubscribe,
}
impl StreamMethod {
pub fn as_str(&self) -> &'static str {
match self {
StreamMethod::SubscribeToTransactions => "subscribe_to_transactions",
StreamMethod::SubscribeToEvents => "subscribe_to_events",
StreamMethod::Unsubscribe => "unsubscribe",
}
}
}
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
pub struct SubscribeToEventsParams {
pub event_key: EventKey,
pub event_seq_num: u64,
}
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
pub struct SubscribeToTransactionsParams {
pub starting_version: u64,
pub include_events: Option<bool>,
}