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// Copyright 2019-2022 ChainSafe Systems
// SPDX-License-Identifier: Apache-2.0, MIT

use cid::Cid;
use fil_actors_shared::v8::make_empty_map;
use fvm_ipld_blockstore::Blockstore;
use fvm_ipld_encoding::tuple::*;
use fvm_shared::address::Address;
use fvm_shared::HAMT_BIT_WIDTH;

#[derive(Debug, Serialize_tuple, Deserialize_tuple)]
pub struct State {
    pub root_key: Address,
    pub verifiers: Cid,
    pub verified_clients: Cid,
    pub remove_data_cap_proposal_ids: Cid,
}

impl State {
    pub fn new<BS: Blockstore>(store: &BS, root_key: Address) -> anyhow::Result<State> {
        let empty_map = make_empty_map::<_, ()>(store, HAMT_BIT_WIDTH)
            .flush()
            .map_err(|e| anyhow::anyhow!("Failed to create empty map: {}", e))?;

        Ok(State {
            root_key,
            verifiers: empty_map,
            verified_clients: empty_map,
            remove_data_cap_proposal_ids: empty_map,
        })
    }
}