helios/client/src/rpc.rs

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use ethers::{abi::AbiEncode, types::Address};
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use eyre::Result;
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use std::{fmt::Display, net::SocketAddr, str::FromStr, sync::Arc};
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use tokio::sync::Mutex;
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use jsonrpsee::{
core::{async_trait, server::rpc_module::Methods, Error},
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http_server::{HttpServerBuilder, HttpServerHandle},
proc_macros::rpc,
};
use super::Client;
use common::utils::u64_to_hex_string;
use execution::types::{CallOpts, ExecutionBlock};
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pub struct Rpc {
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client: Arc<Mutex<Client>>,
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handle: Option<HttpServerHandle>,
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port: u16,
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}
impl Rpc {
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pub fn new(client: Arc<Mutex<Client>>, port: u16) -> Self {
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Rpc {
client,
handle: None,
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port,
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}
}
pub async fn start(&mut self) -> Result<SocketAddr> {
let rpc_inner = RpcInner {
client: self.client.clone(),
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port: self.port,
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};
let (handle, addr) = start(rpc_inner).await?;
self.handle = Some(handle);
Ok(addr)
}
}
#[rpc(client, server, namespace = "eth")]
trait EthRpc {
#[method(name = "getBalance")]
async fn get_balance(&self, address: &str, block: &str) -> Result<String, Error>;
#[method(name = "getTransactionCount")]
async fn get_transaction_count(&self, address: &str, block: &str) -> Result<String, Error>;
#[method(name = "getCode")]
async fn get_code(&self, address: &str, block: &str) -> Result<String, Error>;
#[method(name = "call")]
async fn call(&self, opts: CallOpts, block: &str) -> Result<String, Error>;
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#[method(name = "estimateGas")]
async fn estimate_gas(&self, opts: CallOpts) -> Result<String, Error>;
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#[method(name = "chainId")]
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async fn chain_id(&self) -> Result<String, Error>;
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#[method(name = "gasPrice")]
async fn gas_price(&self) -> Result<String, Error>;
#[method(name = "maxPriorityFeePerGas")]
async fn max_priority_fee_per_gas(&self) -> Result<String, Error>;
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#[method(name = "blockNumber")]
async fn block_number(&self) -> Result<String, Error>;
#[method(name = "getBlockByNumber")]
async fn get_block_by_number(&self, num: &str, full_tx: bool) -> Result<ExecutionBlock, Error>;
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}
#[rpc(client, server, namespace = "net")]
trait NetRpc {
#[method(name = "version")]
async fn version(&self) -> Result<String, Error>;
}
#[derive(Clone)]
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struct RpcInner {
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client: Arc<Mutex<Client>>,
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port: u16,
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}
#[async_trait]
impl EthRpcServer for RpcInner {
async fn get_balance(&self, address: &str, block: &str) -> Result<String, Error> {
let block = convert_err(decode_block(block))?;
let address = convert_err(Address::from_str(address))?;
let client = self.client.lock().await;
let balance = convert_err(client.get_balance(&address, &block).await)?;
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Ok(balance.encode_hex())
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}
async fn get_transaction_count(&self, address: &str, block: &str) -> Result<String, Error> {
let block = convert_err(decode_block(block))?;
let address = convert_err(Address::from_str(address))?;
let client = self.client.lock().await;
let nonce = convert_err(client.get_nonce(&address, &block).await)?;
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Ok(nonce.encode_hex())
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}
async fn get_code(&self, address: &str, block: &str) -> Result<String, Error> {
let block = convert_err(decode_block(block))?;
let address = convert_err(Address::from_str(address))?;
let client = self.client.lock().await;
let code = convert_err(client.get_code(&address, &block).await)?;
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Ok(hex::encode(code))
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}
async fn call(&self, opts: CallOpts, block: &str) -> Result<String, Error> {
let block = convert_err(decode_block(block))?;
let client = self.client.lock().await;
let res = convert_err(client.call(&opts, &block))?;
Ok(format!("0x{}", hex::encode(res)))
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}
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async fn estimate_gas(&self, opts: CallOpts) -> Result<String, Error> {
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let client = self.client.lock().await;
let gas = convert_err(client.estimate_gas(&opts))?;
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Ok(u64_to_hex_string(gas))
}
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async fn chain_id(&self) -> Result<String, Error> {
let client = self.client.lock().await;
let id = client.chain_id();
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Ok(u64_to_hex_string(id))
}
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async fn gas_price(&self) -> Result<String, Error> {
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let client = self.client.lock().await;
let gas_price = convert_err(client.get_gas_price())?;
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Ok(gas_price.encode_hex())
}
async fn max_priority_fee_per_gas(&self) -> Result<String, Error> {
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let client = self.client.lock().await;
let tip = convert_err(client.get_priority_fee())?;
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Ok(tip.encode_hex())
}
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async fn block_number(&self) -> Result<String, Error> {
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let client = self.client.lock().await;
let num = convert_err(client.get_block_number())?;
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Ok(u64_to_hex_string(num))
}
async fn get_block_by_number(
&self,
block: &str,
_full_tx: bool,
) -> Result<ExecutionBlock, Error> {
let block = convert_err(decode_block(block))?;
let client = self.client.lock().await;
let block = convert_err(client.get_block_by_number(&block))?;
Ok(block)
}
}
#[async_trait]
impl NetRpcServer for RpcInner {
async fn version(&self) -> Result<String, Error> {
let client = self.client.lock().await;
Ok(client.chain_id().to_string())
}
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}
async fn start(rpc: RpcInner) -> Result<(HttpServerHandle, SocketAddr)> {
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let addr = format!("127.0.0.1:{}", rpc.port);
let server = HttpServerBuilder::default().build(addr).await?;
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let addr = server.local_addr()?;
let mut methods = Methods::new();
let eth_methods: Methods = EthRpcServer::into_rpc(rpc.clone()).into();
let net_methods: Methods = NetRpcServer::into_rpc(rpc).into();
methods.merge(eth_methods)?;
methods.merge(net_methods)?;
let handle = server.start(methods)?;
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Ok((handle, addr))
}
fn convert_err<T, E: Display>(res: Result<T, E>) -> Result<T, Error> {
res.map_err(|err| {
println!("{}", err.to_string());
Error::Custom(err.to_string())
})
}
fn decode_block(block: &str) -> Result<Option<u64>> {
match block {
"latest" => Ok(None),
_ => {
if block.starts_with("0x") {
Ok(Some(u64::from_str_radix(
block.strip_prefix("0x").unwrap(),
16,
)?))
} else {
Ok(Some(block.parse()?))
}
}
}
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}