microchain: support rename

contracts/eden/src/eden-micro-chain.cpp

@@ -1662,6 +1662,94 @@ void resign(eosio::name account)
    remove_if_exists<by_pk>(db.members, account);
 }
 
+void rename(eosio::name old_account, eosio::name new_account)
+{
+   auto update = [&](auto& acc) {
+      if (acc == old_account)
+         acc = new_account;
+   };
+   auto update_vec = [&](auto& vec) {
+      std::replace(vec.begin(), vec.end(), old_account, new_account);
+   };
+
+   db.status.modify(get_status(), [&](auto& status) { update_vec(status.status.initialMembers); });
+
+   if (auto* obj = get_ptr<by_pk>(db.balances, old_account))
+      db.balances.modify(*obj, [&](auto& obj) { obj.account = new_account; });
+
+   for (auto& obj : db.balance_history)
+      db.balance_history.modify(obj, [&](auto& obj) {
+         update(obj.account);
+         update(obj.other_account);
+      });
+
+   if (auto* obj = get_ptr<by_pk>(db.encryption_keys, old_account))
+      db.encryption_keys.modify(*obj, [&](auto& obj) { obj.account = new_account; });
+
+   for (auto& obj : db.inductions)
+      db.inductions.modify(obj, [&](auto& obj) {
+         update(obj.induction.inviter.first);
+         for (auto& w : obj.induction.witnesses)
+            update(w.first);
+      });
+
+   for (auto& obj : db.members)
+      db.members.modify(obj, [&](auto& obj) {
+         update(obj.member.account);
+         update(obj.member.inviter);
+         update_vec(obj.member.inductionWitnesses);
+      });
+
+   for (auto& obj : db.election_groups)
+      db.election_groups.modify(obj, [&](auto& obj) {
+         // first_member is kept as is since it's only used by events
+         // which have already occurred, and it isn't exposed to the UI
+         update(obj.winner);
+      });
+
+   for (auto& obj : db.votes)
+      db.votes.modify(obj, [&](auto& obj) {
+         update(obj.voter);
+         update(obj.candidate);
+      });
+
+   {
+      auto& idx = db.distribution_funds.get<by_pk>();
+      for (auto it = idx.lower_bound(distribution_fund_key{old_account, {}, 0});
+           it != idx.end() && it->owner == old_account;)
+      {
+         auto next = it;
+         ++next;
+         db.distribution_funds.modify(*it, [&](auto& obj) { obj.owner = new_account; });
+         it = next;
+      }
+   }
+
+   {
+      auto& idx = db.nfts.get<by_member>();
+      for (auto it = idx.lower_bound(nft_account_key{old_account, {}, 0});
+           it != idx.end() && it->member == old_account;)
+      {
+         auto next = it;
+         ++next;
+         db.nfts.modify(*it, [&](auto& obj) { obj.member = new_account; });
+         it = next;
+      }
+   }
+
+   {
+      auto& idx = db.nfts.get<by_owner>();
+      for (auto it = idx.lower_bound(nft_account_key{old_account, {}, 0});
+           it != idx.end() && it->owner == old_account;)
+      {
+         auto next = it;
+         ++next;
+         db.nfts.modify(*it, [&](auto& obj) { obj.owner = new_account; });
+         it = next;
+      }
+   }
+}  // rename
+
 void clear_participating()
 {
    auto& idx = db.members.template get<by_pk>();
@@ -2103,6 +2191,8 @@ bool dispatch(eosio::name action_name, const action_context& context, eosio::inp
       call(inductendors, context, s);
    else if (action_name == "resign"_n)
       call(resign, context, s);
+   else if (action_name == "rename"_n)
+      call(rename, context, s);
    else if (action_name == "electopt"_n)
       call(electopt, context, s);
    else if (action_name == "electvote"_n)

contracts/eden/tests/test-eden.cpp

@@ -1292,6 +1292,8 @@ TEST_CASE("election-events")
    t.run_election(true, 10000, true);
    t.skip_to("2021-02-01T15:30:00.000");
    t.alice.act<actions::distribute>(250);
+   test_chain::user_context{t.chain, {{"eden.gm"_n, "board.major"_n}, {"ahab"_n, "active"_n}}}
+       .act<actions::rename>("alice"_n, "ahab"_n);
    t.write_dfuse_history("dfuse-test-election.json");
    CompareFile{"test-election"}.write_events(t.chain).compare();
 }