{"action":"created","issue":{"url":"https://api.github.com/repos/zcash/zcash/issues/3277","repository_url":"https://api.github.com/repos/zcash/zcash","labels_url":"https://api.github.com/repos/zcash/zcash/issues/3277/labels{/name}","comments_url":"https://api.github.com/repos/zcash/zcash/issues/3277/comments","events_url":"https://api.github.com/repos/zcash/zcash/issues/3277/events","html_url":"https://github.com/zcash/zcash/issues/3277","id":324497689,"number":3277,"title":"Use correct Sapling encoding format","user":{"login":"bitcartel","id":194979,"avatar_url":"https://avatars2.githubusercontent.com/u/194979?v=4","gravatar_id":"","url":"https://api.github.com/users/bitcartel","html_url":"https://github.com/bitcartel","followers_url":"https://api.github.com/users/bitcartel/followers","following_url":"https://api.github.com/users/bitcartel/following{/other_user}","gists_url":"https://api.github.com/users/bitcartel/gists{/gist_id}","starred_url":"https://api.github.com/users/bitcartel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bitcartel/subscriptions","organizations_url":"https://api.github.com/users/bitcartel/orgs","repos_url":"https://api.github.com/users/bitcartel/repos","events_url":"https://api.github.com/users/bitcartel/events{/privacy}","received_events_url":"https://api.github.com/users/bitcartel/received_events","type":"User","site_admin":false},"labels":[{"id":150272745,"url":"https://api.github.com/repos/zcash/zcash/labels/bug","name":"bug","color":"fc4949","default":true}],"state":"open","locked":false,"assignee":{"login":"bitcartel","id":194979,"avatar_url":"https://avatars2.githubusercontent.com/u/194979?v=4","gravatar_id":"","url":"https://api.github.com/users/bitcartel","html_url":"https://github.com/bitcartel","followers_url":"https://api.github.com/users/bitcartel/followers","following_url":"https://api.github.com/users/bitcartel/following{/other_user}","gists_url":"https://api.github.com/users/bitcartel/gists{/gist_id}","starred_url":"https://api.github.com/users/bitcartel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bitcartel/subscriptions","organizations_url":"https://api.github.com/users/bitcartel/orgs","repos_url":"https://api.github.com/users/bitcartel/repos","events_url":"https://api.github.com/users/bitcartel/events{/privacy}","received_events_url":"https://api.github.com/users/bitcartel/received_events","type":"User","site_admin":false},"assignees":[{"login":"bitcartel","id":194979,"avatar_url":"https://avatars2.githubusercontent.com/u/194979?v=4","gravatar_id":"","url":"https://api.github.com/users/bitcartel","html_url":"https://github.com/bitcartel","followers_url":"https://api.github.com/users/bitcartel/followers","following_url":"https://api.github.com/users/bitcartel/following{/other_user}","gists_url":"https://api.github.com/users/bitcartel/gists{/gist_id}","starred_url":"https://api.github.com/users/bitcartel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bitcartel/subscriptions","organizations_url":"https://api.github.com/users/bitcartel/orgs","repos_url":"https://api.github.com/users/bitcartel/repos","events_url":"https://api.github.com/users/bitcartel/events{/privacy}","received_events_url":"https://api.github.com/users/bitcartel/received_events","type":"User","site_admin":false}],"milestone":{"url":"https://api.github.com/repos/zcash/zcash/milestones/71","html_url":"https://github.com/zcash/zcash/milestone/71","labels_url":"https://api.github.com/repos/zcash/zcash/milestones/71/labels","id":3101045,"number":71,"title":"v1.1.1","description":"","creator":{"login":"str4d","id":4993799,"avatar_url":"https://avatars0.githubusercontent.com/u/4993799?v=4","gravatar_id":"","url":"https://api.github.com/users/str4d","html_url":"https://github.com/str4d","followers_url":"https://api.github.com/users/str4d/followers","following_url":"https://api.github.com/users/str4d/following{/other_user}","gists_url":"https://api.github.com/users/str4d/gists{/gist_id}","starred_url":"https://api.github.com/users/str4d/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/str4d/subscriptions","organizations_url":"https://api.github.com/users/str4d/orgs","repos_url":"https://api.github.com/users/str4d/repos","events_url":"https://api.github.com/users/str4d/events{/privacy}","received_events_url":"https://api.github.com/users/str4d/received_events","type":"User","site_admin":false},"open_issues":50,"closed_issues":65,"state":"open","created_at":"2018-02-08T20:36:49Z","updated_at":"2018-05-18T21:38:19Z","due_on":"2018-05-21T07:00:00Z","closed_at":null},"comments":0,"created_at":"2018-05-18T17:47:47Z","updated_at":"2018-05-18T22:17:12Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"Users building and running from master over the past two weeks (since https://github.com/zcash/zcash/commit/1f8be05b635661a2f5472dda6c96be624d58dbcb) will have had Sapling state for the best anchor (the empty tree root) flushed to disk.  This would have used an incorrect encoding format.\r\n\r\nTo resolve this issue:\r\n\r\n1. Use the version of librustzcash with the fixed encoding\r\n\r\n2. Change the prefix used for Sapling anchors from 'X' and 'x' to something else.  This means any data currently stored under 'X' and 'x' will never be used, and this prefix should not be used in future without first deleting any data stored under it.\r\n\r\n3. (Optional) Gate existing calls which result in Sapling state being cached and then flushed to disk, so that they only execute when Sapling is active.\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/zcash/zcash/issues/comments/390347058","html_url":"https://github.com/zcash/zcash/issues/3277#issuecomment-390347058","issue_url":"https://api.github.com/repos/zcash/zcash/issues/3277","id":390347058,"user":{"login":"bitcartel","id":194979,"avatar_url":"https://avatars2.githubusercontent.com/u/194979?v=4","gravatar_id":"","url":"https://api.github.com/users/bitcartel","html_url":"https://github.com/bitcartel","followers_url":"https://api.github.com/users/bitcartel/followers","following_url":"https://api.github.com/users/bitcartel/following{/other_user}","gists_url":"https://api.github.com/users/bitcartel/gists{/gist_id}","starred_url":"https://api.github.com/users/bitcartel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bitcartel/subscriptions","organizations_url":"https://api.github.com/users/bitcartel/orgs","repos_url":"https://api.github.com/users/bitcartel/repos","events_url":"https://api.github.com/users/bitcartel/events{/privacy}","received_events_url":"https://api.github.com/users/bitcartel/received_events","type":"User","site_admin":false},"created_at":"2018-05-18T22:17:12Z","updated_at":"2018-05-18T22:17:12Z","author_association":"CONTRIBUTOR","body":"1 and 2 are handled by https://github.com/zcash/zcash/pull/3275"}}
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