| 709 | } |
| 710 | |
| 711 | uint32_t GluaChainApi::wait_for_future_random(lua_State *L, int next) |
| 712 | { |
| 713 | thinkyoung::lua::lib::increment_lvm_instructions_executed_count(L, CHAIN_GLUA_API_EACH_INSTRUCTIONS_COUNT - 1); |
| 714 | try{ |
| 715 | thinkyoung::blockchain::TransactionEvaluationState* eval_state_ptr = |
| 716 | (thinkyoung::blockchain::TransactionEvaluationState*) |
| 717 | (thinkyoung::lua::lib::get_lua_state_value(L, "evaluate_state").pointer_value); |
| 718 | |
| 719 | if (!eval_state_ptr || !eval_state_ptr->_current_state) |
| 720 | FC_CAPTURE_AND_THROW(lua_executor_internal_error, ("")); |
| 721 | |
| 722 | uint32_t target = eval_state_ptr->_current_state->get_head_block_num() + next; |
| 723 | if (target < next) |
| 724 | return 0; |
| 725 | return target; |
| 726 | } |
| 727 | catch (fc::exception e) |
| 728 | { |
| 729 | L->force_stopping = true; |
| 730 | L->exit_code = LUA_API_INTERNAL_ERROR; |
| 731 | return 0; |
| 732 | } |
| 733 | } |
| 734 | //获取指定块与之前50块的pre_secret hash出的结果，该值在指定块被产出的上一轮出块时就已经确定，而无人可知，无法操控 |
| 735 | //如果希望使用该值作为随机值，以随机值作为其他数据的选取依据时，需要在目标块被产出前确定要被筛选的数据 |
| 736 | //如投注彩票，只允许在目标块被产出前投注 |
no test coverage detected