1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

// Copyright 2019-2024 ChainSafe Systems
// SPDX-License-Identifier: Apache-2.0, MIT

use super::SystemStateNew;
use crate::shim::{
    address::Address,
    machine::{BuiltinActor, BuiltinActorManifest},
    state_tree::{ActorState, StateTree},
};
use crate::state_migration::common::PostMigrator;
use crate::utils::db::CborStoreExt as _;
use anyhow::anyhow;
use fvm_ipld_blockstore::Blockstore;
use fvm_ipld_encoding::CborStore;

pub struct EthAccountPostMigrator;

impl<BS: Blockstore> PostMigrator<BS> for EthAccountPostMigrator {
    /// Creates the Ethereum Account actor in the state tree.
    fn post_migrate_state(&self, store: &BS, actors_out: &mut StateTree<BS>) -> anyhow::Result<()> {
        let init_actor = actors_out.get_required_actor(&Address::INIT_ACTOR)?;
        let init_state: fil_actor_init_state::v10::State =
            store.get_cbor_required(&init_actor.state)?;

        let eth_zero_addr =
            Address::new_delegated(Address::ETHEREUM_ACCOUNT_MANAGER_ACTOR.id()?, &[0; 20])?;
        let eth_zero_addr_id = init_state
            .resolve_address(&store, &eth_zero_addr.into())?
            .ok_or_else(|| anyhow!("failed to get eth zero actor"))?;

        let system_actor = actors_out
            .get_actor(&Address::new_id(0))?
            .ok_or_else(|| anyhow!("failed to get system actor"))?;

        let system_actor_state = store
            .get_cbor::<SystemStateNew>(&system_actor.state)?
            .ok_or_else(|| anyhow!("failed to get system actor state"))?;

        let new_manifest =
            BuiltinActorManifest::load_v1_actor_list(store, &system_actor_state.builtin_actors)?;

        let eth_account_actor = ActorState::new(
            new_manifest.get(BuiltinActor::EthAccount)?,
            fil_actors_shared::v10::runtime::EMPTY_ARR_CID,
            Default::default(),
            0,
            Some(eth_zero_addr),
        );

        actors_out.set_actor(&eth_zero_addr_id.into(), eth_account_actor)?;
        Ok(())
    }
}