feat: add evm script (#1039)

* feat: add evm script

add a script which can run arbitrary binaries

* fix lint

* move evm runner script to `revme` subcommand

* cargo fmt

* cli byecode,input,path, state options added, output result

bins/revme/Cargo.toml

@@ -10,8 +10,10 @@ version = "0.2.2"
 
 [dependencies]
 hash-db = "0.15"
+hex = "0.4"
 hashbrown = "0.14"
 indicatif = "0.17"
+microbench = "0.5"
 plain_hasher = "0.2"
 revm = { path = "../../crates/revm", version = "6.1.0", default-features = false, features = [
     "ethersdb",

bins/revme/src/cmd.rs

@@ -1,3 +1,4 @@
+pub mod evmrunner;
 pub mod format_kzg_setup;
 pub mod statetest;
 
@@ -13,6 +14,10 @@ pub enum MainCmd {
         about = "Format kzg settings from a trusted setup file (.txt) into binary format (.bin)"
     )]
     FormatKzgSetup(format_kzg_setup::Cmd),
+    #[structopt(
+        about = "Evm runner command allows running arbitrary evm bytecode.\nBytecode can be provided from cli or from file with --path option."
+    )]
+    Evm(evmrunner::Cmd),
 }
 
 #[derive(Debug, thiserror::Error)]
@@ -21,13 +26,16 @@ pub enum Error {
     Statetest(#[from] statetest::Error),
     #[error(transparent)]
     KzgErrors(#[from] format_kzg_setup::KzgErrors),
+    #[error(transparent)]
+    EvmRunnerErrors(#[from] evmrunner::Errors),
 }
 
 impl MainCmd {
     pub fn run(&self) -> Result<(), Error> {
         match self {
             Self::Statetest(cmd) => cmd.run().map_err(Into::into),
             Self::FormatKzgSetup(cmd) => cmd.run().map_err(Into::into),
+            Self::Evm(cmd) => cmd.run().map_err(Into::into),
         }
     }
 }

bins/revme/src/cmd/evmrunner.rs

@@ -0,0 +1,105 @@
+use revm::{
+    db::BenchmarkDB,
+    primitives::{Address, Bytecode, TransactTo},
+    Evm,
+};
+use std::io::Error as IoError;
+use std::path::PathBuf;
+use std::time::Duration;
+use std::{borrow::Cow, fs};
+use structopt::StructOpt;
+
+extern crate alloc;
+
+#[derive(Debug, thiserror::Error)]
+pub enum Errors {
+    #[error("The specified path does not exist")]
+    PathNotExists,
+    #[error("Invalid bytecode")]
+    InvalidBytecode,
+    #[error("Invalid input")]
+    InvalidInput,
+    #[error("EVM Error")]
+    EVMError,
+    #[error(transparent)]
+    Io(IoError),
+}
+
+impl From<IoError> for Errors {
+    fn from(e: IoError) -> Self {
+        Errors::Io(e)
+    }
+}
+
+/// Evm runner command allows running arbitrary evm bytecode.
+/// Bytecode can be provided from cli or from file with --path option.
+#[derive(StructOpt, Debug)]
+pub struct Cmd {
+    /// Bytecode to be executed.
+    #[structopt(default_value = "")]
+    bytecode: String,
+    /// Path to file containing the evm bytecode.
+    /// Overrides the bytecode option.
+    #[structopt(long)]
+    path: Option<PathBuf>,
+    /// Run in benchmarking mode.
+    #[structopt(long)]
+    bench: bool,
+    /// Input bytes.
+    #[structopt(long, default_value = "")]
+    input: String,
+    /// Print the state.
+    #[structopt(long)]
+    state: bool,
+}
+
+impl Cmd {
+    /// Run statetest command.
+    pub fn run(&self) -> Result<(), Errors> {
+        let bytecode_str: Cow<'_, str> = if let Some(path) = &self.path {
+            // check if path exists.
+            if !path.exists() {
+                return Err(Errors::PathNotExists);
+            }
+            fs::read_to_string(path)?.to_owned().into()
+        } else {
+            self.bytecode.as_str().into()
+        };
+
+        let bytecode = hex::decode(bytecode_str.trim()).map_err(|_| Errors::InvalidBytecode)?;
+        let input = hex::decode(self.input.trim())
+            .map_err(|_| Errors::InvalidInput)?
+            .into();
+        // BenchmarkDB is dummy state that implements Database trait.
+        // the bytecode is deployed at zero address.
+        let mut evm = Evm::builder()
+            .with_db(BenchmarkDB::new_bytecode(Bytecode::new_raw(
+                bytecode.into(),
+            )))
+            .modify_tx_env(|tx| {
+                // execution globals block hash/gas_limit/coinbase/timestamp..
+                tx.caller = "0x0000000000000000000000000000000000000001"
+                    .parse()
+                    .unwrap();
+                tx.transact_to = TransactTo::Call(Address::ZERO);
+                tx.data = input;
+            })
+            .build();
+
+        if self.bench {
+            // Microbenchmark
+            let bench_options = microbench::Options::default().time(Duration::from_secs(3));
+
+            microbench::bench(&bench_options, "Run bytecode", || {
+                let _ = evm.transact().unwrap();
+            });
+        } else {
+            let out = evm.transact().map_err(|_| Errors::EVMError)?;
+            println!("Result: {:#?}", out.result);
+            if self.state {
+                println!("State: {:#?}", out.state);
+            }
+        }
+        Ok(())
+    }
+}