Fetch CAS blobs over Iroh

crates/geth-cas/src/lib.rs

@@ -244,6 +244,14 @@ impl LocalCas {
         std::fs::copy(path, out).map_err(CasError::from)
     }
 
+    pub fn read_bytes(&self, hash: &BlobHash) -> Result<Vec<u8>, CasError> {
+        let path = self.blob_path(hash)?;
+        if !path.exists() {
+            return Err(CasError::NotFound(hash.to_string()));
+        }
+        Ok(std::fs::read(path)?)
+    }
+
     pub fn has(&self, hash: &BlobHash) -> Result<bool, CasError> {
         Ok(self.blob_path(hash)?.exists())
     }
@@ -547,6 +555,10 @@ mod tests {
         let out = dir.path().join("out.txt");
         cas.get_to_path(&info.hash, &out).expect("get");
         assert_eq!(std::fs::read(out).expect("read"), b"hello geth");
+        assert_eq!(
+            cas.read_bytes(&info.hash).expect("read bytes"),
+            b"hello geth"
+        );
     }
 
     #[test]