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use anyhow::format_err;
use diem_state_view::StateView;
use diem_types::{
account_address::AccountAddress,
account_config::{self, diem_root_address},
transaction::{ChangeSet, Script, Version},
};
use diem_vm::{convert_changeset_and_events, data_cache::RemoteStorage};
use move_core_types::{
identifier::Identifier,
language_storage::{ModuleId, TypeTag},
resolver::MoveResolver,
transaction_argument::convert_txn_args,
value::{serialize_values, MoveValue},
};
use move_vm_runtime::{move_vm::MoveVM, session::Session};
use move_vm_types::gas_schedule::GasStatus;
pub struct GenesisSession<'r, 'l, S>(Session<'r, 'l, S>);
impl<'r, 'l, S: MoveResolver> GenesisSession<'r, 'l, S> {
pub fn exec_func(
&mut self,
module_name: &str,
function_name: &str,
ty_args: Vec<TypeTag>,
args: Vec<Vec<u8>>,
) {
self.0
.execute_function(
&ModuleId::new(
account_config::CORE_CODE_ADDRESS,
Identifier::new(module_name).unwrap(),
),
&Identifier::new(function_name).unwrap(),
ty_args,
args,
&mut GasStatus::new_unmetered(),
)
.unwrap_or_else(|e| {
panic!(
"Error calling {}.{}: {}",
module_name,
function_name,
e.into_vm_status()
)
});
}
pub fn exec_script(&mut self, sender: AccountAddress, script: &Script) {
self.0
.execute_script(
script.code().to_vec(),
script.ty_args().to_vec(),
convert_txn_args(script.args()),
vec![sender],
&mut GasStatus::new_unmetered(),
)
.unwrap()
}
fn disable_reconfiguration(&mut self) {
self.exec_func(
"DiemConfig",
"disable_reconfiguration",
vec![],
serialize_values(&vec![MoveValue::Signer(diem_root_address())]),
)
}
fn enable_reconfiguration(&mut self) {
self.exec_func(
"DiemConfig",
"enable_reconfiguration",
vec![],
serialize_values(&vec![MoveValue::Signer(diem_root_address())]),
)
}
pub fn set_diem_version(&mut self, version: Version) {
self.exec_func(
"DiemVersion",
"set",
vec![],
serialize_values(&vec![
MoveValue::Signer(diem_root_address()),
MoveValue::U64(version),
]),
)
}
}
pub fn build_changeset<S: StateView, F>(state_view: &S, procedure: F) -> ChangeSet
where
F: FnOnce(&mut GenesisSession<RemoteStorage<S>>),
{
let move_vm = MoveVM::new(diem_vm::natives::diem_natives()).unwrap();
let (changeset, events) = {
let state_view_storage = RemoteStorage::new(state_view);
let mut session = GenesisSession(move_vm.new_session(&state_view_storage));
session.disable_reconfiguration();
procedure(&mut session);
session.enable_reconfiguration();
session
.0
.finish()
.map_err(|err| format_err!("Unexpected VM Error: {:?}", err))
.unwrap()
};
let (writeset, events) = convert_changeset_and_events(changeset, events)
.map_err(|err| format_err!("Unexpected VM Error: {:?}", err))
.unwrap();
ChangeSet::new(writeset, events)
}