feat: cache contracts before benching

.github/workflows/gas-bench.yml

@@ -31,6 +31,9 @@ jobs:
         with:
           key: "gas-bench"
 
+      - name: install cargo-stylus
+        run: cargo install [email protected] [email protected]
+
       - name: install solc
         run: |
           curl -LO https://github.com/ethereum/solidity/releases/download/v0.8.21/solc-static-linux

benches/src/erc20.rs

@@ -1,3 +1,5 @@
+use std::process::Command;
+
 use alloy::{
     network::{AnyNetwork, EthereumWallet},
     primitives::Address,
@@ -8,6 +10,7 @@ use alloy::{
 };
 use alloy_primitives::U256;
 use e2e::{receipt, Account};
+use eyre::{bail, Context};
 
 use crate::report::Report;
 
@@ -60,6 +63,19 @@ pub async fn bench() -> eyre::Result<Report> {
     let contract = Erc20::new(contract_addr, &alice_wallet);
     let contract_bob = Erc20::new(contract_addr, &bob_wallet);
 
+    // Add contract to cache manager. We leave the bid unspecified, since we
+    // should have plenty of room to fill the cache (can hold ~4k contracts).
+    let status = Command::new("cargo-stylus")
+        .arg("cache")
+        .args(&["-e", &std::env::var("RPC_URL")?])
+        .args(&["--private-key", &format!("0x{}", alice.pk())])
+        .args(&["--address", &format!("{}", contract_addr)])
+        .status()
+        .with_context(|| "`cargo stylus cache` failed:")?;
+    if !status.success() {
+        bail!("Failed to cache Erc20 contract");
+    }
+
     // IMPORTANT: Order matters!
     use Erc20::*;
     #[rustfmt::skip]