331 lines
10 KiB
Rust
331 lines
10 KiB
Rust
use reqwest;
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use reqwest::header::CONTENT_TYPE;
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use serde_json::{self, Value};
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use solana_sdk::timing::{DEFAULT_TICKS_PER_SLOT, NUM_TICKS_PER_SECOND};
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use std::net::SocketAddr;
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use std::thread::sleep;
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use std::time::Duration;
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use std::{error, fmt};
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use solana_sdk::pubkey::Pubkey;
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#[derive(Clone)]
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pub struct RpcClient {
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pub client: reqwest::Client,
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pub addr: String,
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}
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impl RpcClient {
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pub fn new(addr: String) -> Self {
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RpcClient {
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client: reqwest::Client::new(),
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addr,
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}
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}
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pub fn new_with_timeout(addr: SocketAddr, timeout: Duration) -> Self {
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let addr = get_rpc_request_str(addr, false);
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let client = reqwest::Client::builder()
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.timeout(timeout)
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.build()
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.expect("build rpc client");
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RpcClient { client, addr }
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}
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pub fn new_from_socket(addr: SocketAddr) -> Self {
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Self::new(get_rpc_request_str(addr, false))
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}
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pub fn retry_get_balance(
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&self,
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id: u64,
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pubkey: &Pubkey,
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retries: usize,
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) -> Result<Option<u64>, Box<dyn error::Error>> {
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let params = json!([format!("{}", pubkey)]);
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let res = self
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.retry_make_rpc_request(id, &RpcRequest::GetBalance, Some(params), retries)?
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.as_u64();
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Ok(res)
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}
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pub fn retry_make_rpc_request(
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&self,
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id: u64,
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request: &RpcRequest,
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params: Option<Value>,
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mut retries: usize,
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) -> Result<Value, Box<dyn error::Error>> {
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let request_json = request.build_request_json(id, params);
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loop {
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match self
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.client
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.post(&self.addr)
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.header(CONTENT_TYPE, "application/json")
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.body(request_json.to_string())
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.send()
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{
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Ok(mut response) => {
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let json: Value = serde_json::from_str(&response.text()?)?;
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if json["error"].is_object() {
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Err(RpcError::RpcRequestError(format!(
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"RPC Error response: {}",
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serde_json::to_string(&json["error"]).unwrap()
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)))?
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}
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return Ok(json["result"].clone());
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}
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Err(e) => {
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info!(
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"make_rpc_request() failed, {} retries left: {:?}",
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retries, e
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);
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if retries == 0 {
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Err(e)?;
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}
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retries -= 1;
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// Sleep for approximately half a slot
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sleep(Duration::from_millis(
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500 * DEFAULT_TICKS_PER_SLOT / NUM_TICKS_PER_SECOND,
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));
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}
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}
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}
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}
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}
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pub fn get_rpc_request_str(rpc_addr: SocketAddr, tls: bool) -> String {
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if tls {
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format!("https://{}", rpc_addr)
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} else {
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format!("http://{}", rpc_addr)
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}
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}
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pub trait RpcRequestHandler {
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fn make_rpc_request(
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&self,
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id: u64,
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request: RpcRequest,
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params: Option<Value>,
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) -> Result<Value, Box<dyn error::Error>>;
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}
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impl RpcRequestHandler for RpcClient {
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fn make_rpc_request(
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&self,
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id: u64,
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request: RpcRequest,
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params: Option<Value>,
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) -> Result<Value, Box<dyn error::Error>> {
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self.retry_make_rpc_request(id, &request, params, 0)
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}
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}
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#[derive(Debug, PartialEq)]
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pub enum RpcRequest {
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ConfirmTransaction,
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GetAccountInfo,
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GetBalance,
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GetRecentBlockhash,
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GetSignatureStatus,
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GetTransactionCount,
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RequestAirdrop,
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SendTransaction,
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RegisterNode,
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SignVote,
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DeregisterNode,
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GetStorageBlockhash,
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GetStorageEntryHeight,
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GetStoragePubkeysForEntryHeight,
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FullnodeExit,
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}
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impl RpcRequest {
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fn build_request_json(&self, id: u64, params: Option<Value>) -> Value {
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let jsonrpc = "2.0";
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let method = match self {
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RpcRequest::ConfirmTransaction => "confirmTransaction",
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RpcRequest::GetAccountInfo => "getAccountInfo",
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RpcRequest::GetBalance => "getBalance",
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RpcRequest::GetRecentBlockhash => "getRecentBlockhash",
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RpcRequest::GetSignatureStatus => "getSignatureStatus",
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RpcRequest::GetTransactionCount => "getTransactionCount",
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RpcRequest::RequestAirdrop => "requestAirdrop",
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RpcRequest::SendTransaction => "sendTransaction",
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RpcRequest::RegisterNode => "registerNode",
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RpcRequest::SignVote => "signVote",
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RpcRequest::DeregisterNode => "deregisterNode",
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RpcRequest::GetStorageBlockhash => "getStorageBlockhash",
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RpcRequest::GetStorageEntryHeight => "getStorageEntryHeight",
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RpcRequest::GetStoragePubkeysForEntryHeight => "getStoragePubkeysForEntryHeight",
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RpcRequest::FullnodeExit => "fullnodeExit",
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};
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let mut request = json!({
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"jsonrpc": jsonrpc,
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"id": id,
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"method": method,
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});
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if let Some(param_string) = params {
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request["params"] = param_string;
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}
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request
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}
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}
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#[derive(Debug, Clone, PartialEq)]
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pub enum RpcError {
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RpcRequestError(String),
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}
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impl fmt::Display for RpcError {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "invalid")
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}
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}
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impl error::Error for RpcError {
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fn description(&self) -> &str {
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"invalid"
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}
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fn cause(&self) -> Option<&dyn error::Error> {
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// Generic error, underlying cause isn't tracked.
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None
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use jsonrpc_core::{Error, IoHandler, Params};
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use jsonrpc_http_server::{AccessControlAllowOrigin, DomainsValidation, ServerBuilder};
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use serde_json::Number;
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use std::net::Ipv4Addr;
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use std::sync::mpsc::channel;
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use std::thread;
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#[test]
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fn test_build_request_json() {
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let test_request = RpcRequest::GetAccountInfo;
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let addr = json!(["deadbeefXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNHhx"]);
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let request = test_request.build_request_json(1, Some(addr.clone()));
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assert_eq!(request["method"], "getAccountInfo");
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assert_eq!(request["params"], addr,);
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let test_request = RpcRequest::GetBalance;
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let request = test_request.build_request_json(1, Some(addr));
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assert_eq!(request["method"], "getBalance");
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let test_request = RpcRequest::GetRecentBlockhash;
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let request = test_request.build_request_json(1, None);
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assert_eq!(request["method"], "getRecentBlockhash");
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let test_request = RpcRequest::GetTransactionCount;
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let request = test_request.build_request_json(1, None);
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assert_eq!(request["method"], "getTransactionCount");
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let test_request = RpcRequest::RequestAirdrop;
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let request = test_request.build_request_json(1, None);
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assert_eq!(request["method"], "requestAirdrop");
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let test_request = RpcRequest::SendTransaction;
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let request = test_request.build_request_json(1, None);
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assert_eq!(request["method"], "sendTransaction");
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}
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#[test]
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fn test_make_rpc_request() {
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let (sender, receiver) = channel();
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thread::spawn(move || {
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let rpc_addr = socketaddr!(0, 0);
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let mut io = IoHandler::default();
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// Successful request
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io.add_method("getBalance", |_params: Params| {
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Ok(Value::Number(Number::from(50)))
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});
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// Failed request
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io.add_method("getRecentBlockhash", |params: Params| {
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if params != Params::None {
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Err(Error::invalid_request())
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} else {
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Ok(Value::String(
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"deadbeefXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNHhx".to_string(),
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))
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}
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});
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let server = ServerBuilder::new(io)
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.threads(1)
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.cors(DomainsValidation::AllowOnly(vec![
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AccessControlAllowOrigin::Any,
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]))
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.start_http(&rpc_addr)
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.expect("Unable to start RPC server");
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sender.send(*server.address()).unwrap();
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server.wait();
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});
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let rpc_addr = receiver.recv().unwrap();
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let rpc_client = RpcClient::new_from_socket(rpc_addr);
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let balance = rpc_client.make_rpc_request(
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1,
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RpcRequest::GetBalance,
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Some(json!(["deadbeefXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNHhx"])),
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);
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assert_eq!(balance.unwrap().as_u64().unwrap(), 50);
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let blockhash = rpc_client.make_rpc_request(2, RpcRequest::GetRecentBlockhash, None);
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assert_eq!(
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blockhash.unwrap().as_str().unwrap(),
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"deadbeefXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNHhx"
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);
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// Send erroneous parameter
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let blockhash =
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rpc_client.make_rpc_request(3, RpcRequest::GetRecentBlockhash, Some(json!("paramter")));
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assert_eq!(blockhash.is_err(), true);
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}
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#[test]
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fn test_retry_make_rpc_request() {
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solana_logger::setup();
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let (sender, receiver) = channel();
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thread::spawn(move || {
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// 1. Pick a random port
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// 2. Tell the client to start using it
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// 3. Delay for 1.5 seconds before starting the server to ensure the client will fail
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// and need to retry
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let rpc_addr = socketaddr!(0, 4242);
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sender.send(rpc_addr.clone()).unwrap();
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sleep(Duration::from_millis(1500));
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let mut io = IoHandler::default();
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io.add_method("getBalance", move |_params: Params| {
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Ok(Value::Number(Number::from(5)))
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});
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let server = ServerBuilder::new(io)
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.threads(1)
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.cors(DomainsValidation::AllowOnly(vec![
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AccessControlAllowOrigin::Any,
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]))
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.start_http(&rpc_addr)
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.expect("Unable to start RPC server");
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server.wait();
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});
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let rpc_addr = receiver.recv().unwrap();
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let rpc_client = RpcClient::new_from_socket(rpc_addr);
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let balance = rpc_client.retry_make_rpc_request(
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1,
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&RpcRequest::GetBalance,
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Some(json!(["deadbeefXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNHhw"])),
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10,
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);
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assert_eq!(balance.unwrap().as_u64().unwrap(), 5);
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}
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}
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