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stateful.rs
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stateful.rs
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pub use crate::remote_db::{RemoteDB, RemoteDBError};
use core::convert::Infallible;
use std::io;
use tokio::runtime::Handle;
use tokio::sync::{mpsc, watch};
use tokio::task::block_in_place;
use execution::rpc::http_rpc::HttpRpc;
use execution::state::State;
use execution::ExecutionClient;
use helios::prelude::Block;
use revm::{
db::{CacheDB, EmptyDB},
inspectors::TracerEip3155,
primitives::SpecId,
primitives::{Address, B256, U256},
primitives::{BlockEnv, CfgEnv, EVMError, Env, ExecutionResult, MsgEnv, TxEnv},
Transact,
};
use ethers::core::types::{Block as EthersBlock, BlockNumber, TxHash};
use ethers::providers::{Http, Provider, ProviderError};
use ethers::utils as ethers_utils;
use std::convert::TryFrom;
use crate::consensus::Consensus;
use crate::utils::{ethers_block_to_helios, BlockError};
use eyre::Report;
use helios::types::BlockTag;
use crate::new_andromeda_revm;
pub struct StatefulExecutor {
pub rpc_state_provider: ExecutionClient<HttpRpc>,
pub http_provider: Provider<Http>,
pub consensus: Consensus,
finalized_block_tx: watch::Sender<Option<Block>>,
}
#[derive(Debug)]
pub enum StatefulExecutorError {
BlockError(BlockError),
RPCError(Report),
ProviderError(ProviderError),
EVMError(EVMError<RemoteDBError<Infallible>>),
ConsensusError(consensus::errors::ConsensusError),
}
pub struct StatefulExecutorConfig {
pub rpc: String,
}
impl StatefulExecutor {
pub fn new_with_cfg(cfg: StatefulExecutorConfig) -> Self {
let (_block_tx, block_rx) = mpsc::channel(1);
let (finalized_block_tx, finalized_block_rx) = watch::channel(None);
let consensus = Consensus::new().unwrap();
let rpc_state_provider: ExecutionClient<HttpRpc> =
ExecutionClient::new(&cfg.rpc, State::new(block_rx, finalized_block_rx, 1))
.expect("could not instantiate execution client");
let http_provider = Provider::<Http>::try_from(cfg.rpc.clone())
.expect("could not instantiate HTTP Provider");
StatefulExecutor {
rpc_state_provider,
consensus,
http_provider,
finalized_block_tx,
}
}
pub async fn advance(&mut self, block_tag: BlockTag) -> Result<(), StatefulExecutorError> {
let block_selector = match block_tag {
BlockTag::Latest => ethers_utils::serialize(&BlockNumber::Latest),
BlockTag::Finalized => ethers_utils::serialize(&BlockNumber::Finalized),
BlockTag::Number(n) => ethers_utils::serialize(&BlockNumber::Number(n.into())),
};
let block: EthersBlock<TxHash> = self
.http_provider
.request(
"eth_getBlockByNumber",
[block_selector, ethers_utils::serialize(&false)],
)
.await
.map_err(|err| StatefulExecutorError::ProviderError(err))?;
let helios_block =
ethers_block_to_helios(block).map_err(|err| StatefulExecutorError::BlockError(err))?;
self.consensus
.advance(&helios_block)
.map_err(|err| StatefulExecutorError::ConsensusError(err))?;
self.finalized_block_tx
.send(Some(helios_block))
.expect("could not submit new block to state");
Ok(())
}
pub fn execute(
&self,
tx: TxEnv,
trace: bool,
) -> Result<ExecutionResult, StatefulExecutorError> {
let block_env = match block_in_place(|| {
Handle::current().block_on(self.rpc_state_provider.get_block(BlockTag::Latest, false))
}) {
Err(err) => Err(StatefulExecutorError::RPCError(err)),
Ok(b) => Ok(BlockEnv {
number: U256::from(b.number.as_u64()),
coinbase: Address::from_slice(b.miner.as_bytes()),
timestamp: U256::from(b.timestamp.as_u64()),
gas_limit: U256::from(b.gas_limit.as_u64()),
basefee: U256::from_limbs(b.base_fee_per_gas.0),
difficulty: U256::from_limbs(b.difficulty.0),
prevrandao: Some(B256::ZERO), // TODO! REVM thinks this is post-merge
blob_excess_gas_and_price: None,
}),
}?;
let mut cfg = CfgEnv::default();
cfg.spec_id = SpecId::SHANGHAI;
let msg = MsgEnv {
caller: tx.caller.clone(),
};
let mut env = Env {
cfg,
msg,
tx,
block: block_env,
};
let mut db = RemoteDB::new(
self.rpc_state_provider.clone(),
CacheDB::new(EmptyDB::new()),
);
match match trace {
true => {
let writer = Box::new(io::stderr());
let mut inspector = TracerEip3155::new(writer, true, true);
let mut evm_impl = new_andromeda_revm(&mut db, &mut env, Some(&mut inspector));
evm_impl.transact()
}
false => {
let mut evm_impl = new_andromeda_revm(&mut db, &mut env, None);
evm_impl.transact()
}
} {
Ok(evm_res) => Ok(evm_res.result),
Err(err) => Err(StatefulExecutorError::EVMError(err)),
}
}
}
#[derive(Debug)]
pub enum CommandError {
InputError(String),
SerializationError(String),
StatefulExecutorError(StatefulExecutorError),
}
impl StatefulExecutor {
pub async fn execute_command(
&mut self,
input: &str,
trace: bool,
) -> Result<String, CommandError> {
// We support two commands: advance <block number|latest|empty(latest)> and execute <TxEnv json>
let (command, args) = match input.split_once(' ') {
Some((command, args)) => (command, Some(args)),
None => (input, None),
};
match command {
"advance" => {
let tag = match args {
None => Ok(BlockTag::Latest),
Some("latest") => Ok(BlockTag::Latest),
Some(args) => match args.parse::<u64>() {
Ok(n) => Ok(BlockTag::Number(n)),
_ => Err(CommandError::InputError(String::from("invalid block tag"))),
},
}?;
match self.advance(tag).await {
Ok(_) => Ok(String::from("advanced")),
Err(e) => Err(CommandError::StatefulExecutorError(e)),
}
}
"execute" => match args {
None => Err(CommandError::InputError(String::from(
"no args passed to execute",
))),
Some(args) => {
let tx = match serde_json::from_str::<TxEnv>(args) {
Ok(tx) => Ok(tx),
Err(e) => Err(CommandError::SerializationError(format!(
"could not parse tx: {}",
e
))),
}?;
match self.execute(tx, trace) {
Ok(res) => match serde_json::to_string(&res) {
Ok(res) => Ok(String::from(res)),
Err(e) => Err(CommandError::InputError(format!(
"could not serialize result: {}",
e
))),
},
Err(e) => Err(CommandError::InputError(format!(
"could not execute: {:?}",
e
))),
}
}
},
_ => Err(CommandError::InputError(format!("invalid command"))),
}
}
}