fix(ethers-solc): Error instead of panic when checking if the checksum was found (gakonst#2421)

* chore: add ChecksumNotFound variant

* fix: replace panic with error when checking for a checksum

* chore: fmt

Author: Evalir

ethers-solc/src/compile/mod.rs

@@ -480,7 +480,10 @@ impl Solc {
         hasher.update(content);
         let checksum_calc = &hasher.finalize()[..];
 
-        let checksum_found = &RELEASES.0.get_checksum(&version).expect("checksum not found");
+        let checksum_found = &RELEASES
+            .0
+            .get_checksum(&version)
+            .ok_or_else(|| SolcError::ChecksumNotFound { version: version.clone() })?;
 
         if checksum_calc == checksum_found {
             Ok(())

ethers-solc/src/error.rs

@@ -19,6 +19,8 @@ pub enum SolcError {
     VersionNotFound,
     #[error("Checksum mismatch for {file}: expected {expected} found {detected} for {version}")]
     ChecksumMismatch { version: Version, expected: String, detected: String, file: PathBuf },
+    #[error("Checksum not found for {version}")]
+    ChecksumNotFound { version: Version },
     #[error(transparent)]
     SemverError(#[from] semver::Error),
     /// Deserialization error