struct NftOpenMinterState {
  bytes nftScript;
  bytes merkleRoot;
  int nextLocalId;
}

struct NftMerkleLeaf {
  bytes commitScript;
  int localId;
  bool isMined;
}

library NftOpenMinterProto {
  static function stateHash(NftOpenMinterState _state) : bytes {
    return hash160(_state.nftScript + _state.merkleRoot + pack(_state.nextLocalId));
  }
  static function nftMerkleLeafToString(NftMerkleLeaf leaf) : bytes {
    bytes isMinedByte = leaf.isMined ? b'01' : b'00';
    return leaf.commitScript + pack(leaf.localId) + isMinedByte;
  }
}