Interface BlockHeader

interface BlockHeader {
    approvals: string[];
    block_merkle_root: string;
    challenges_result: any[];
    challenges_root: string;
    chunk_headers_root: string;
    chunk_mask: boolean[];
    chunk_receipts_root: string;
    chunk_tx_root: string;
    chunks_included: number;
    epoch_id: string;
    gas_price: string;
    hash: string;
    height: number;
    last_ds_final_block: string;
    last_final_block: string;
    latest_protocol_version: number;
    next_bp_hash: string;
    next_epoch_id: string;
    outcome_root: string;
    prev_hash: string;
    prev_state_root: string;
    random_value: string;
    rent_paid: string;
    signature: string;
    timestamp: number;
    timestamp_nanosec: string;
    total_supply: string;
    validator_proposals: any[];
    validator_reward: string;
}