Remove artifacts for serai-processor-ethereum-contracts

processor/ethereum/contracts/build.rs

@@ -1,8 +1,69 @@
-fn main() {
-  build_solidity_contracts::build(
-    &["../../../networks/ethereum/schnorr/contracts"],
-    "contracts",
-    "artifacts",
+use std::{env, fs};
+
+use alloy_sol_macro_input::{SolInputKind, SolInput};
+
+fn write(sol: syn_solidity::File, file: &str) {
+  let sol = alloy_sol_macro_expander::expand::expand(sol).unwrap();
+  fs::write(
+    file,
+    // TODO: Replace `prettyplease::unparse` with `to_string`
+    prettyplease::unparse(&syn::File {
+      attrs: vec![],
+      items: vec![syn::parse2(sol).unwrap()],
+      shebang: None,
+    })
+    .as_bytes(),
   )
   .unwrap();
 }
+
+fn sol(sol: &str, file: &str) {
+  let alloy_sol_macro_input::SolInputKind::Sol(sol) =
+    syn::parse_str(&std::fs::read_to_string(sol).unwrap()).unwrap()
+  else {
+    panic!("parsed .sol file wasn't SolInputKind::Sol");
+  };
+  write(sol, file);
+}
+
+fn abi(ident: &str, abi: &str, file: &str) {
+  let SolInputKind::Sol(sol) = (SolInput {
+    attrs: vec![],
+    path: None,
+    kind: SolInputKind::Json(
+      syn::parse_str(ident).unwrap(),
+      serde_json::from_str(&fs::read_to_string(abi).unwrap()).unwrap(),
+    ),
+  })
+  .normalize_json()
+  .unwrap()
+  .kind
+  else {
+    panic!("normalized JSON wasn't SolInputKind::Sol");
+  };
+  write(sol, file);
+}
+
+fn main() {
+  let artifacts_path =
+    env::var("OUT_DIR").unwrap().to_string() + "/serai-processor-ethereum-contracts";
+  build_solidity_contracts::build(
+    &["../../../networks/ethereum/schnorr/contracts"],
+    "contracts",
+    &artifacts_path,
+  )
+  .unwrap();
+
+  // TODO: Use OUT_DIR for the generated code
+  if !fs::exists("src/abigen").unwrap() {
+    fs::create_dir("src/abigen").unwrap();
+  }
+
+  // These can be handled with the sol! macro
+  sol("contracts/IERC20.sol", "src/abigen/erc20.rs");
+  sol("contracts/Deployer.sol", "src/abigen/deployer.rs");
+  // This cannot be handled with the sol! macro. The Solidity requires an import, the ABI is built
+  // to OUT_DIR and the macro doesn't support non-static paths:
+  // https://github.com/alloy-rs/core/issues/738
+  abi("Router", &(artifacts_path.clone() + "/Router.abi"), "src/abigen/router.rs");
+}