the solc github releases downloader

Signed-off-by: xermicus <bigcyrill@hotmail.com>

Cargo.lock

@@ -2877,10 +2877,12 @@ name = "revive-dt-solc-binaries"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "hex",
  "once_cell",
  "reqwest",
  "semver 1.0.26",
  "serde",
+ "sha2",
 ]
 
 [[package]]

Cargo.toml

@@ -29,6 +29,7 @@ once_cell = "1.21"
 semver = {version = "1.0", features = ["serde"] }
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 serde_json = { version = "1.0", default-features = false, features = ["arbitrary_precision", "std"] }
+sha2 = { version = "0.10.8" }
 tokio = { version = "1", default-features = false, features = ["rt-multi-thread"] }
 
 # revive compiler

crates/compiler/src/revive_js.rs

@@ -1,2 +1,2 @@
-//! Implements the [SolidityCompiler] trait with revive Wasm for
+//! Implements the [crate::SolidityCompiler] trait with revive Wasm for
 //! compiling contracts to PVM bytecode (via Wasm).

crates/compiler/src/revive_resolc.rs

@@ -1,2 +1,2 @@
-//! Implements the [SolidityCompiler] trait with resolc for
+//! Implements the [crate::SolidityCompiler] trait with resolc for
 //! compiling contracts to PVM bytecode.

crates/solc-binaries/Cargo.toml

@@ -14,7 +14,9 @@ download = ["reqwest"]
 
 [dependencies]
 anyhow = { workspace = true }
+hex = { workspace = true }
 once_cell = { workspace = true }
 reqwest = { workspace = true, optional = true }
 semver = { workspace = true }
 serde = { workspace = true }
+sha2 = { workspace = true }

crates/solc-binaries/src/download.rs

@@ -3,6 +3,8 @@
 use std::{collections::HashMap, sync::Mutex};
 
 use once_cell::sync::Lazy;
+use semver::Version;
+use sha2::{Digest, Sha256};
 
 use crate::list::List;
 
@@ -31,31 +33,113 @@ impl List {
     }
 }
 
-#[cfg(test)]
-mod tests {
-    use crate::list::List;
+/// Download solc binaries from GitHub releases (IPFS links aren't reliable).
+pub struct GHDownloader {
+    version: Version,
+    target: &'static str,
+    list: &'static str,
+}
 
-    #[test]
-    fn try_get_windows_list() {
-        List::download(List::WINDOWS_URL).unwrap();
-        List::download(List::WINDOWS_URL).unwrap();
+impl GHDownloader {
+    pub const BASE_URL: &str = "https://github.com/ethereum/solidity/releases/download";
+
+    pub const LINUX_NAME: &str = "solc-static-linux";
+    pub const MACOSX_NAME: &str = "solc-macos";
+    pub const WINDOWS_NAME: &str = "solc-windows.exe";
+    pub const WASM_NAME: &str = "soljson.js";
+
+    pub fn linux(version: Version) -> Self {
+        Self {
+            version,
+            target: Self::LINUX_NAME,
+            list: List::LINUX_URL,
+        }
     }
 
-    #[test]
-    fn try_get_macosx_list() {
-        List::download(List::MACOSX_URL).unwrap();
-        List::download(List::MACOSX_URL).unwrap();
+    pub fn macosx(version: Version) -> Self {
+        Self {
+            version,
+            target: Self::MACOSX_NAME,
+            list: List::MACOSX_URL,
+        }
     }
 
-    #[test]
-    fn try_get_linux_list() {
-        List::download(List::LINUX_URL).unwrap();
-        List::download(List::LINUX_URL).unwrap();
+    pub fn windows(version: Version) -> Self {
+        Self {
+            version,
+            target: Self::WINDOWS_NAME,
+            list: List::WINDOWS_URL,
+        }
     }
 
-    #[test]
-    fn try_get_wasm_list() {
-        List::download(List::WASM_URL).unwrap();
-        List::download(List::WASM_URL).unwrap();
+    pub fn wasm(version: Version) -> Self {
+        Self {
+            version,
+            target: Self::WASM_NAME,
+            list: List::WASM_URL,
+        }
+    }
+
+    /// Download the solc binary.
+    ///
+    /// Errors out if the download fails or the digest of the downloaded file
+    /// mismatches the expected digest from the release [List].
+    pub fn download(&self) -> anyhow::Result<Vec<u8>> {
+        let expected_digest = List::download(self.list)?
+            .builds
+            .iter()
+            .find(|build| build.version == self.version)
+            .ok_or_else(|| anyhow::anyhow!("solc v{} not found builds", self.version))
+            .map(|b| b.sha256.strip_prefix("0x").unwrap_or(&b.sha256).to_string())?;
+
+        let url = format!("{}/v{}/{}", Self::BASE_URL, self.version, self.target);
+        let file = reqwest::blocking::get(&url)?.bytes()?.to_vec();
+
+        if hex::encode(Sha256::digest(&file)) != expected_digest {
+            anyhow::bail!("sha256 mismatch for solc version {}", self.version);
+        }
+
+        Ok(file)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{download::GHDownloader, list::List};
+
+    #[test]
+    fn try_get_windows() {
+        let version = List::download(List::WINDOWS_URL)
+            .unwrap()
+            .latest_release
+            .into();
+        GHDownloader::windows(version).download().unwrap();
+    }
+
+    #[test]
+    fn try_get_macosx() {
+        let version = List::download(List::MACOSX_URL)
+            .unwrap()
+            .latest_release
+            .into();
+        GHDownloader::macosx(version).download().unwrap();
+    }
+
+    #[test]
+    fn try_get_linux() {
+        let version = List::download(List::LINUX_URL)
+            .unwrap()
+            .latest_release
+            .into();
+        GHDownloader::linux(version).download().unwrap();
+    }
+
+    #[test]
+    fn try_get_wasm() {
+        let version = List::download(List::WASM_URL)
+            .unwrap()
+            .latest_release
+            .into();
+        GHDownloader::wasm(version).download().unwrap();
     }
 }

crates/solc-binaries/src/list.rs

@@ -20,7 +20,7 @@ pub struct Build {
     pub build: String,
     #[serde(rename = "longVersion")]
     pub long_version: String,
-    keccak256: String,
-    sha256: String,
-    urls: Vec<String>,
+    pub keccak256: String,
+    pub sha256: String,
+    pub urls: Vec<String>,
 }