wip: migrate to miden-toolchain.toml

Cargo.toml

@@ -30,7 +30,6 @@ miden-faucet-lib       = { path = "crates/faucet", version = "0.15.0" }
 miden-pow-rate-limiter = { path = "crates/pow", version = "0.15.0" }
 
 # Miden dependencies.
-cargo-miden               = { version = "0.8.1" }
 miden                     = { version = "0.11" }
 miden-client              = { version = "0.14" }
 miden-client-cli          = { version = "0.14" }

crates/faucet/Cargo.toml

@@ -16,7 +16,6 @@ workspace = true
 
 [dependencies]
 # Miden dependencies.
-cargo-miden               = { workspace = true }
 miden-client              = { features = ["tonic"], workspace = true }
 miden-client-sqlite-store = { workspace = true }
 miden-standards           = { version = "0.14" }

crates/faucet/build.rs

@@ -0,0 +1,28 @@
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+const CONTRACTS: &[&str] = &["mint-tx"];
+
+fn main() {
+    let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let contracts_dir = manifest_dir.join("../contracts");
+
+    for contract in CONTRACTS {
+        let dir = contracts_dir.join(contract);
+        // println!("cargo:rerun-if-changed={}", dir.display());
+        compile(&dir);
+    }
+}
+
+fn compile(dir: &Path) {
+    let manifest_path = dir.join("Cargo.toml");
+    let status = Command::new("miden")
+        .arg("build")
+        .arg("--release")
+        .arg("--manifest-path")
+        .arg(&manifest_path)
+        .status()
+        .unwrap_or_else(|e| panic!("failed to spawn `miden build` for {}: {e}", dir.display()));
+
+    // assert!(status.success(), "`miden build` for {} exited with {status}", dir.display());
+}

crates/faucet/src/lib.rs

@@ -34,12 +34,13 @@ use tracing::{Instrument, error, info, info_span, instrument, warn};
 use url::Url;
 
 mod note_screener;
-mod package;
 pub mod requests;
 pub mod types;
 
+use miden_client::Deserializable;
+use miden_client::vm::Package;
+
 use crate::note_screener::NoteScreener;
-use crate::package::{compile_dir_with_libs, write_faucet_component_masl};
 use crate::requests::{MintError, MintRequest, MintResponse, MintResponseSender};
 use crate::types::AssetAmount;
 
@@ -145,17 +146,10 @@ impl Faucet {
         }
         client.set_setting(DEFAULT_ACCOUNT_ID_SETTING.to_owned(), account.id()).await?;
 
-        // Compile the mint tx script from Rust via cargo-miden, linking the official
-        // BasicFungibleFaucet account component so that `account.mint_and_send()` resolves
-        // to the correct procedure digest.
-        let workspace_root = Path::new(env!("CARGO_MANIFEST_DIR"));
-        let tmp_dir = std::env::temp_dir().join("miden-faucet-build");
-        let faucet_masl = write_faucet_component_masl(&tmp_dir)?;
-        let package = compile_dir_with_libs(
-            &workspace_root.join("../contracts/mint-tx"),
-            true,
-            &[&faucet_masl],
-        )?;
+        // The mint tx script package is built by build.rs and embedded into the binary.
+        let package_bytes = include_bytes!(concat!(env!("OUT_DIR"), "/mint_tx.masp"));
+        let package = Package::read_from_bytes(package_bytes)
+            .context("failed to deserialize mint tx package")?;
         let script = TransactionScript::new(package.unwrap_program());
         client.set_setting(MINT_TX_SCRIPT_SETTING.to_string(), script).await?;
 
@@ -790,11 +784,8 @@ mod tests {
         client.ensure_genesis_in_place().await.unwrap();
         client.add_account(&account, false).await.unwrap();
 
-        let tmp_dir = temp_dir().join(format!("miden-faucet-build-{}", Uuid::new_v4()));
-        let faucet_masl = write_faucet_component_masl(&tmp_dir).unwrap();
-        let package =
-            compile_dir_with_libs(Path::new("../contracts/mint-tx"), true, &[&faucet_masl])
-                .unwrap();
+        let package_bytes = include_bytes!(concat!(env!("OUT_DIR"), "/mint_tx.masp"));
+        let package = Package::read_from_bytes(package_bytes).unwrap();
         let program = package.unwrap_program();
         let script =
             TransactionScript::from_parts(program.mast_forest().clone(), program.entrypoint());

miden-toolchain.toml

@@ -0,0 +1,3 @@
+[toolchain]
+channel = "0.14.0"
+components = ["cargo-miden"]

rust-toolchain.toml

@@ -1,5 +1,2 @@
 [toolchain]
 channel    = "nightly-2025-12-10"
-components = ["clippy", "llvm-tools", "rust-src", "rustfmt"]
-profile    = "minimal"
-targets    = ["wasm32-wasip2"]