链上通用Dao的方案

// DaoSpace.move
module DaoSpace {

  struct Space {
    voting_delay: u128, // The delay between when a proposal is created, and when the voting starts. A voting_delay of 0 means that as soon as the proposal is created, anyone can vote. A voting_delay of 3600 means that voting will start 3600 seconds after the proposal is created.
    voting_duration: u128, // The duration of the voting period, i.e. how long people will be able to vote for a proposal.
    meta_data: vector<u8>, // 空间元数据，编码后存储在链上（可考虑存在链下）
  }
  
  struct NFTMeta {
    user: address,
  }
  
  struct NFTBody {
     weight: u128
  }
  
  struct SpaceCapability {
  }

  // 创建 space，一个账号只能创建一个（是否只能一个账户创建一个，待讨论）
  public fun create(signer: &signer, voting_delay: u128, voting_duration: u128, meta_data: &vector<u8>): SpaceCapability;
  // 查询 space
  public fun query(broker: address) : (u128, u128, u128);
  // 非托管账号 register
  public fun register(signer: &signer, space_broker: address, cap: &SpaceCapability) : NFT<NFTMeta, NFTBody>;
  // 非托管账号 unregister
  public fun unregister(signer: &signer, nft: NFT<NFTMeta, NFTBody>);
  // NFT 添加权重
  public fun add_weight(signer: &signer, nft: &mut NFT<NFTMeta, NFTBody>);
  // NFT 减少权重
  public fun reduce_weight(signer: &signer, nft: &mut NFT<NFTMeta, NFTBody>);
}

// DaoProposal.move
module DaoProposal {

  struct ProposalCapability {
    proposal_id: u64,
  }

  struct Proposal<Action> {
    ... // 现有的一些结构
    proposal_id: u64,
    voting_system: u8, // 投票类型有单选投票、二次投票、排名投票、加权投票等投票类型
    voting_start_time: u64,
    voting_end_time: u64,
    voting_block_num: u64, // 投票快照高度
    voting_block_root: vector<u8>, // 投票快照高度的root hash
    action: Option::Option<Action>, // 执行策略的结构参数
  }
  
  struct Vote {
    /// vote for the proposal under the `proposer`.
    proposer: address,
    /// proposal id.
    id: u64,
    choie: u8, // 同意，反对，拒绝
    weight: u128, // 投票权重
  }
  
  public fun create_proposal<Action>(...,
      space_broker: address, 
      space_id: u64,
      root_hash: &vector<u8>): ProposalCapability;
  
  public fun cast_vote(
      signer: &signer,
      proposer_broker: address,
      id: u64, 
      amount: u128,
      choice: u8,
      cap: &ProposalCapability
    );
    
  public fun extract_strategy<Action>(id: u64) : Action;
};

// Dao.move
module Dao {
  use DaoSpace;

  struct DaoSignerDelegate {
    cap: SignerCapability, // 托管的签名（这里一旦放进来，就没法再还回去了，且只有一份，没想好是放在space还是放在这里，暂时放这里）
  }
  
  struct DaoSpace {
    cap: SpaceCapability
  }
  
  struct DaoProposal {
    cap: ProposalCapability
  }
    
  struct DaoProposalSet {
    proposal_set: HashSet<u64, DaoProposal>
  }
  
  // 执行策略：转账
  struct ExecutionTransferStrategy<phontem TokenT> {
    amount: u128,
    to: address,
  }
  
  // 项目方创建space
  public fun new_space(
     signer: &signer, 
     voting_delay: u64, 
     voting_period: u64, 
     min_action_delay: u64) {
     // 项目方托管 SignerCapability 到该合约
     // 通过DaoSpace合约创建对应的结构
     // 将DaoSpace权限存到当前合约
  }
     
  // 参与投票方/创建投票方注册到space
  public fun register_to_space(
      signer: &signer, 
      broker: address) {
      // 创建对应的NFT
  }

  // 参与投票方/创建投票方注册到space
  // 方便再上一层的DAO调用
  public fun regiter_to_space_get_nft(
      signer: &signer, 
      broker: address) : Option::Option<NFT<DaoSpace::NFTMeta, DaoSpace::NFTData>> {
  }
  
  // 根据 space_broker 来创建对应的proposal
  public fun create_proposal<ExecutionStrategy>(
      signer: &signer, // 创建者
      space_broker: u64, // space 代理人
      block_num: u64, // 快照高度
      root_hash: vector<u8> // 快照根hash
  );
  
  // 投票
  public fun do_vote(
      signer: &signer, 
      broker: address,
      id: u64, 
      amount: u128,
      choice: u8,
      proof: &vector<u8>,
      side_nodes: &vector<u8>) {
    // 证明...
    // 取本地NFT
    // 用NFT投票
    do_vote_with_nft(broker, id, choice, );
  }
  
  // 用NFT来投票
  // 方便上层DAO来调用
  public fun do_vote_with_nft(
    broker: address,
    id: u64,
    choice: u8,
    nft: Option::Option<NFT<DaoSpace::NFTMeta, DaoSpace::NFTData>>
  ) {
    
  }
}