fix: correct computed file callback data and result digest calculations (#11)

Author: Natchica

post-compute/src/compute/computed_file.rs

@@ -161,7 +161,7 @@ pub fn read_computed_file(
 ///
 /// let mut computed_file = ComputedFile {
 ///     task_id: Some("0x123".to_string()),
-///     callback_data: Some("0xabc...".to_string()),
+///     callback_data: Some("0x0000000000000000000000000000000000000000000000000000000000000001".to_string()),
 ///     deterministic_output_path: None,
 ///     result_digest: None,
 ///     enclave_signature: None,
@@ -170,7 +170,13 @@ pub fn read_computed_file(
 ///
 /// // For a web3 callback task
 /// match build_result_digest_in_computed_file(&mut computed_file, true) {
-///     Ok(()) => println!("Result digest: {:?}", computed_file.result_digest),
+///     Ok(()) => {
+///         assert_eq!(
+///             computed_file.result_digest,
+///             Some("0xb10e2d527612073b26eecdfd717e6a320cf44b4afac2b0732d9fcbe2b7fa0cf6".to_string())
+///         );
+///         println!("Result digest: {:?}", computed_file.result_digest);
+///     },
 ///     Err(e) => eprintln!("Error computing digest: {:?}", e),
 /// }
 /// ```
@@ -442,7 +448,7 @@ mod tests {
         assert!(result.is_ok());
         assert_eq!(
             computed_file.result_digest,
-            Some("0xcb371be217faa47dab94e0d0ff0840c6cbf41645f0dc1a6ae3f34447155a76f3".to_string())
+            Some("0xb10e2d527612073b26eecdfd717e6a320cf44b4afac2b0732d9fcbe2b7fa0cf6".to_string())
         );
     }
 

post-compute/src/compute/utils/hash_utils.rs

@@ -44,10 +44,6 @@ pub fn sha256<D: Sha256Digest>(input: D) -> String {
     format!("0x{}", digest(input))
 }
 
-pub fn keccak256(input: &str) -> String {
-    format!("0x{:x}", Keccak256::digest(input))
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -105,12 +101,4 @@ mod tests {
             sha256(String::from("utf8String"))
         )
     }
-
-    #[test]
-    fn get_keccak256_digest() {
-        assert_eq!(
-            "0x234b7550275b36696569d306216e035df78db522674abecff884c64e7558ef17",
-            keccak256("utf8String")
-        );
-    }
 }

post-compute/src/compute/utils/result_utils.rs

@@ -1,5 +1,7 @@
-use crate::compute::utils::hash_utils::{concatenate_and_hash, sha256};
-use crate::compute::{computed_file::ComputedFile, utils::hash_utils::keccak256};
+use crate::compute::{
+    computed_file::ComputedFile,
+    utils::hash_utils::{concatenate_and_hash, sha256},
+};
 use log::error;
 use std::{
     fs::{self, DirEntry},
@@ -62,7 +64,7 @@ pub fn compute_web3_result_digest(computed_file: &ComputedFile) -> String {
         }
     };
 
-    keccak256(callback_data)
+    concatenate_and_hash(&[callback_data])
 }
 
 /// Computes the result digest for web2 tasks using SHA256 hashing of output files.
@@ -299,7 +301,7 @@ mod tests {
 
         assert_eq!(
             result,
-            "0xcb371be217faa47dab94e0d0ff0840c6cbf41645f0dc1a6ae3f34447155a76f3"
+            "0xb10e2d527612073b26eecdfd717e6a320cf44b4afac2b0732d9fcbe2b7fa0cf6"
         );
     }