fix: token amount in approval (#46)

* fix: token amount in approval

* feat: Add source amount to BridgeResult struct and methods

* fix: remove incorrect tests

---------

Co-authored-by: Ankur Dubey <[email protected]>

crates/routing-engine/src/settlement_engine.rs

@@ -594,51 +594,6 @@ mod tests {
         )
     }
 
-    #[tokio::test]
-    async fn test_should_take_existing_approval_into_consideration_while_building_approval_data() {
-        let config = Arc::new(setup_config());
-        let engine = setup(&config);
-
-        let required_approval_data = RequiredApprovalDetails {
-            chain_id: 42161,
-            token_address: TOKEN_ADDRESS_USDC_42161.to_string().try_into().unwrap(),
-            owner: TEST_OWNER_WALLET.to_string(),
-            target: TARGET_100_USDC_APPROVAL_BY_OWNER_ON_42161_FOR_USDC.to_string(),
-            amount: U256::from(150),
-        };
-
-        let transaction = engine
-            .generate_transaction_for_approval(&required_approval_data)
-            .await
-            .unwrap()
-            .unwrap();
-
-        assert!(if let TransactionType::Approval(_) = transaction.transaction_type {
-            true
-        } else {
-            false
-        });
-
-        assert_eq!(transaction.transaction.to, TOKEN_ADDRESS_USDC_42161);
-        assert_eq!(transaction.transaction.value, U256::ZERO);
-        assert_eq!(
-            transaction.transaction.calldata,
-            engine
-                .erc20_instance_map
-                .get(&(required_approval_data.chain_id, required_approval_data.token_address))
-                .expect("ERC20 Utils not found")
-                .approve(
-                    TARGET_100_USDC_APPROVAL_BY_OWNER_ON_42161_FOR_USDC
-                        .to_string()
-                        .parse()
-                        .expect("Invalid address"),
-                    U256::from(50)
-                )
-                .calldata()
-                .to_string()
-        )
-    }
-
     #[tokio::test]
     async fn test_should_generate_approvals_for_multiple_required_transactions() {
         let config = Arc::new(setup_config());
@@ -713,7 +668,7 @@ mod tests {
                         .to_string()
                         .parse()
                         .expect("Invalid address"),
-                    U256::from(50)
+                    U256::from(150)
                 )
                 .calldata()
                 .to_string()