Adding method to hash the Tx structure

Cargo.toml

@@ -11,3 +11,4 @@ chrono = "0.4.37"
 hex-literal = "0.4.1"
 ring = "0.17.8"
 serde_json = "1.0.115"
+sha2 = "0.10.8"

src/main.rs

@@ -1,5 +1,6 @@
 #![allow(dead_code, unused)]
 mod block;
+mod transactions;
 use block::block_header::BlockHeader;
 use chrono::Utc;
 use mining_challenge::{read_mempool, read_tx_from_file};

src/transactions/tx.rs

@@ -1,8 +1,9 @@
 #![allow(dead_code, unused)]
-// use serde::{Serialize, Deserialize}
-// use serde_json;
 // use ring::digest;
 
+use core::hash;
+
+use sha2::{Digest, Sha256, Sha256VarCore};
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -31,6 +32,21 @@ impl Tx{
         }
     }
 
+    pub fn get_tx_hash(&self) -> String{
+        let serialized_tx = format!("{:?}", self);
+        let mut hasher = Sha256::new();
+
+        hasher.update(serialized_tx.as_bytes());
+
+        let result = hasher.finalize();
+
+        let hash_string = result.iter().map(|byte| format!("{:02x}", byte)).collect::<String>();
+
+        println!("{}", serialized_tx);
+
+        return hash_string;
+    }
+
     pub fn get_tx_size_in_bits(&self) -> u64 {
         // initial value for tx_size because every transaction will have at least 64 bits
         let mut tx_size: u64 = 32 + 32;