feat(example): deploy bytecode from scratch

crates/revm/Cargo.toml

@@ -133,6 +133,11 @@ name = "db_by_ref"
 path = "../../examples/db_by_ref.rs"
 required-features = ["std", "serde-json"]
 
+[[example]]
+name = "deploy"
+path = "../../examples/deploy.rs"
+required-features = []
+
 #[[example]]
 #name = "uniswap_v2_usdc_swap"
 #path = "../../examples/uniswap_v2_usdc_swap.rs"

examples/deploy.rs

@@ -0,0 +1,87 @@
+use anyhow::{anyhow, bail};
+use revm::{
+    interpreter::opcode,
+    primitives::{bytes::Bytes, hex, EthereumWiring, ExecutionResult, Output, TxKind, U256},
+    Evm, InMemoryDB,
+};
+
+/// Load number parameter and set to storage with slot 0
+const INIT_CODE: &[u8] = &[
+    opcode::PUSH1,
+    0x01,
+    opcode::PUSH1,
+    0x17,
+    opcode::PUSH1,
+    0x1f,
+    opcode::CODECOPY,
+    opcode::PUSH0,
+    opcode::MLOAD,
+    opcode::PUSH0,
+    opcode::SSTORE,
+];
+
+/// Copy runtime bytecode to memory and return
+const RET: &[u8] = &[
+    opcode::PUSH1,
+    0x02,
+    opcode::PUSH1,
+    0x15,
+    opcode::PUSH0,
+    opcode::CODECOPY,
+    opcode::PUSH1,
+    0x02,
+    opcode::PUSH0,
+    opcode::RETURN,
+];
+
+/// Load storage from slot zero to memory
+const RUNTIME_BYTECODE: &[u8] = &[opcode::PUSH0, opcode::SLOAD];
+
+fn main() -> anyhow::Result<()> {
+    let param = 0x42;
+    let bytecode: Bytes = [INIT_CODE, RET, RUNTIME_BYTECODE, &[param]].concat().into();
+    let mut evm: Evm<'_, EthereumWiring<InMemoryDB, ()>> =
+        Evm::<EthereumWiring<InMemoryDB, ()>>::builder()
+            .with_default_db()
+            .with_default_ext_ctx()
+            .modify_tx_env(|tx| {
+                tx.transact_to = TxKind::Create;
+                *tx.data = bytecode.clone();
+            })
+            .build();
+
+    println!("bytecode: {}", hex::encode(bytecode));
+    let ref_tx = evm.transact_commit()?;
+    let ExecutionResult::Success {
+        output: Output::Create(_, Some(address)),
+        ..
+    } = ref_tx
+    else {
+        bail!("Failed to create contract: {ref_tx:#?}");
+    };
+
+    println!("Created contract at {address}");
+    evm = evm
+        .modify()
+        .modify_tx_env(|tx| {
+            tx.transact_to = TxKind::Call(address);
+            *tx.data = Default::default();
+            tx.nonce += 1;
+        })
+        .build();
+
+    let result = evm.transact()?;
+    let Some(storage0) = result
+        .state
+        .get(&address)
+        .ok_or_else(|| anyhow!("Contract not found"))?
+        .storage
+        .get::<U256>(&Default::default())
+    else {
+        bail!("Failed to write storage in the init code: {result:#?}");
+    };
+
+    println!("storage U256(0) at{address}:  {storage0:#?}");
+    assert_eq!(storage0.present_value(), param.try_into()?, "{result:#?}");
+    Ok(())
+}