更改：悬赏金额变更需要同步至链上以及关联疑修新增标记是否解决

app/controllers/pull_requests_controller.rb

@@ -227,11 +227,13 @@ class PullRequestsController < ApplicationController
 
             # 查看是否fix了相关issue，如果fix就转账
             @pull_request.attached_issues.each do |issue| 
+              next if PullAttachedIssue.exist?(issue_id: issue.id, fixed: true)
               token_num = issue.blockchain_token_num
               token_num = token_num.nil? ? 0 : token_num
               author_id = @pull_request.user_id
               if token_num > 0
                 Blockchain::FixIssue.call({user_id: author_id.to_s, project_id: @project.id.to_s, token_num: token_num}) if Site.has_blockchain? && @project.use_blockchain
+                PullAttachedIssue.find_by(issue_id: issue.id, pull_request_id: @pull_request.id).update(fixed: true)
               end
               # update issue to state 5
               issue.update(status_id: 5)