added devent 3 host functions, mock data from json decoded to binary

* added sfield constants
* added mock_data, data is read from json file. Hashes and AccountIDs fields are decoded to binary when requested by host functions to match ripples.
* added Locator string
* refactored main and vm
* some basic tests done, more tests are needed

Author: pwang200

wasm-host/src/vm.rs

@@ -21,56 +21,28 @@ pub fn run_func(wasm_file: String, func_name: &str, data_source: MockData) -> Wa
     let data_provider = DataProvider::new(data_source);
 
     debug!("Setting up instance map and registering host functions");
-    let mut instances: HashMap<String, &mut dyn SyncInst> = HashMap::new();
+    let mut instances : HashMap<String, &mut dyn SyncInst> = HashMap::new();
     let mut import_builder = ImportObjectBuilder::new("host_lib", data_provider)?;
     import_builder.with_func::<(i32, i32), i32>("get_ledger_sqn", get_ledger_sqn)?;
-    import_builder
-        .with_func::<(i32, i32), i32>("get_parent_ledger_time", get_parent_ledger_time)?;
-    import_builder
-        .with_func::<(i32, i32), i32>("get_parent_ledger_hash", get_parent_ledger_hash)?;
+    import_builder.with_func::<(i32, i32), i32>("get_parent_ledger_time", get_parent_ledger_time)?;
+    import_builder.with_func::<(i32, i32), i32>("get_parent_ledger_hash", get_parent_ledger_hash)?;
     import_builder.with_func::<(i32, i32, i32), i32>("ledger_slot_set", ledger_slot_set)?;
     import_builder.with_func::<(i32, i32, i32), i32>("get_tx_field", get_tx_field)?;
-    import_builder.with_func::<(i32, i32, i32), i32>(
-        "get_current_ledger_obj_field",
-        get_current_ledger_obj_field,
-    )?;
-    import_builder
-        .with_func::<(i32, i32, i32, i32), i32>("get_ledger_obj_field", get_ledger_obj_field)?;
-    import_builder
-        .with_func::<(i32, i32, i32, i32), i32>("get_tx_nested_field", get_tx_nested_field)?;
-    import_builder.with_func::<(i32, i32, i32, i32), i32>(
-        "get_current_ledger_obj_nested_field",
-        get_current_ledger_obj_nested_field,
-    )?;
-    import_builder.with_func::<(i32, i32, i32, i32, i32), i32>(
-        "get_ledger_obj_nested_field",
-        get_ledger_obj_nested_field,
-    )?;
+    import_builder.with_func::<(i32, i32, i32), i32>("get_current_ledger_obj_field", get_current_ledger_obj_field)?;
+    import_builder.with_func::<(i32, i32, i32, i32), i32>("get_ledger_obj_field", get_ledger_obj_field)?;
+    import_builder.with_func::<(i32, i32, i32, i32), i32>("get_tx_nested_field", get_tx_nested_field)?;
+    import_builder.with_func::<(i32, i32, i32, i32), i32>("get_current_ledger_obj_nested_field", get_current_ledger_obj_nested_field)?;
+    import_builder.with_func::<(i32, i32, i32, i32, i32), i32>("get_ledger_obj_nested_field", get_ledger_obj_nested_field)?;
     import_builder.with_func::<i32, i32>("get_tx_array_len", get_tx_array_len)?;
-    import_builder.with_func::<i32, i32>(
-        "get_current_ledger_obj_array_len",
-        get_current_ledger_obj_array_len,
-    )?;
-    import_builder
-        .with_func::<(i32, i32), i32>("get_ledger_obj_array_len", get_ledger_obj_array_len)?;
-    import_builder
-        .with_func::<(i32, i32), i32>("get_tx_nested_array_len", get_tx_nested_array_len)?;
-    import_builder.with_func::<(i32, i32), i32>(
-        "get_current_ledger_obj_nested_array_len",
-        get_current_ledger_obj_nested_array_len,
-    )?;
-    import_builder.with_func::<(i32, i32, i32), i32>(
-        "get_ledger_obj_nested_array_len",
-        get_ledger_obj_nested_array_len,
-    )?;
+    import_builder.with_func::<i32, i32>("get_current_ledger_obj_array_len", get_current_ledger_obj_array_len)?;
+    import_builder.with_func::<(i32, i32), i32>("get_ledger_obj_array_len", get_ledger_obj_array_len)?;
+    import_builder.with_func::<(i32, i32), i32>("get_tx_nested_array_len", get_tx_nested_array_len)?;
+    import_builder.with_func::<(i32, i32), i32>("get_current_ledger_obj_nested_array_len", get_current_ledger_obj_nested_array_len)?;
+    import_builder.with_func::<(i32, i32, i32), i32>("get_ledger_obj_nested_array_len", get_ledger_obj_nested_array_len)?;
     import_builder.with_func::<(i32, i32), ()>("update_data", update_data)?;
-    import_builder
-        .with_func::<(i32, i32, i32, i32), i32>("compute_sha512_half", compute_sha512_half)?;
+    import_builder.with_func::<(i32, i32, i32, i32), i32>("compute_sha512_half", compute_sha512_half)?;
     import_builder.with_func::<(i32, i32, i32, i32), i32>("account_keylet", account_keylet)?;
-    import_builder.with_func::<(i32, i32, i32, i32, i32, i32, i32, i32), i32>(
-        "credential_keylet",
-        credential_keylet,
-    )?;
+    import_builder.with_func::<(i32, i32, i32, i32, i32, i32, i32, i32), i32>("credential_keylet", credential_keylet)?;
     import_builder.with_func::<(i32, i32, i32, i32, i32), i32>("escrow_keylet", escrow_keylet)?;
     import_builder.with_func::<(i32, i32, i32, i32, i32), i32>("oracle_keylet", oracle_keylet)?;
     //import_builder.with_func::<(i32, i32, i32, i32), i32>("", )?;