diff --git a/Server/api/servers.js b/Server/api/servers.js
index 4776658..dd8f980 100644
--- a/Server/api/servers.js
+++ b/Server/api/servers.js
@@ -22,7 +22,7 @@ module.exports = (R, $) => {
     await next()
   })
 
-  R.get('/api/server/:id', async ctx => {
+  R.get('/api/server/:id', async (ctx) => {
     const { userId } = ctx.session
     const { id } = ctx.params
 
@@ -46,7 +46,7 @@ module.exports = (R, $) => {
     ctx.body = server
   })
 
-  R.get('/api/server/:id/slug', async ctx => {
+  R.get('/api/server/:id/slug', async (ctx) => {
     const { id } = ctx.params
 
     const srv = await $.discord.getServer(id)
@@ -60,7 +60,7 @@ module.exports = (R, $) => {
     ctx.body = srv
   })
 
-  R.patch('/api/server/:id', async ctx => {
+  R.patch('/api/server/:id', async (ctx) => {
     const { userId } = ctx.session
     const { id } = ctx.params
 
@@ -89,20 +89,19 @@ module.exports = (R, $) => {
       ...(categories != null ? { categories } : {}),
     })
 
-    
     ctx.body = { ok: true }
 
     $.P.invalidate(id)
     $.discord.invalidate(id)
   })
 
-  R.get('/api/admin/servers', async ctx => {
+  R.get('/api/admin/servers', async (ctx) => {
     const { userId } = ctx.session
     if (!$.discord.isRoot(userId)) {
       return
     }
 
-    ctx.body = $.discord.client.guilds.map(g => ({
+    ctx.body = $.discord.client.guilds.map((g) => ({
       url: `${process.env.APP_URL}/s/${g.id}`,
       name: g.name,
       members: g.members.array().length,
@@ -110,7 +109,7 @@ module.exports = (R, $) => {
     }))
   })
 
-  R.patch('/api/servers/:server/roles', async ctx => {
+  R.patch('/api/servers/:server/roles', async (ctx) => {
     const { userId } = ctx.session
     const { server } = ctx.params
     const { added, removed } = ctx.request.body
@@ -126,21 +125,28 @@ module.exports = (R, $) => {
 
     // current roles and allowed roles are an inclusive set.
     // first, filter added and removed.
-    const sanitizedAdded = added.filter(role => allowedRoles.includes(role))
-    const sanitizedRemoved = removed.filter(role => allowedRoles.includes(role))
+    const sanitizedAdded = added.filter((role) => allowedRoles.includes(role))
+    const sanitizedRemoved = removed.filter((role) => allowedRoles.includes(role))
 
     // filter currentRoles by what's been removed (down is faster than up)
-    let newRoles = currentRoles.filter(role => !sanitizedRemoved.includes(role))
+    let newRoles = currentRoles.filter((role) => !sanitizedRemoved.includes(role))
 
     // last, add new roles
     newRoles = [...newRoles, ...sanitizedAdded]
 
     if (!arrayMatches(currentRoles, newRoles)) {
-      await $.discord.updateRoles(gm, newRoles)
+      if (process.env.FF_TransactionalRoles !== '0') {
+        await $.discord.updateRolesTx(gm, {
+          added: sanitizedAdded,
+          removed: sanitizedRemoved,
+        })
+      } else {
+        await $.discord.updateRoles(gm, newRoles)
+      }
     }
 
     ctx.body = { ok: true }
-    
+
     $.P.invalidate(userId)
     $.discord.invalidate(userId)
   })
@@ -160,4 +166,4 @@ const arrayMatches = (a, b) => {
   }
 
   return false
-}
\ No newline at end of file
+}
diff --git a/Server/services/discord.js b/Server/services/discord.js
index 5eced43..0fa688c 100644
--- a/Server/services/discord.js
+++ b/Server/services/discord.js
@@ -1,6 +1,6 @@
 const Service = require('./Service')
 const superagent = require('superagent')
-const { DiscordClient, Member } = require('@roleypoly/rpc/discord')
+const { DiscordClient, Member, RoleTransaction, TxDelta } = require('@roleypoly/rpc/discord')
 const { IDQuery, DiscordUser } = require('@roleypoly/rpc/shared')
 const { Empty } = require('google-protobuf/google/protobuf/empty_pb')
 const { NodeHttpTransport } = require('@improbable-eng/grpc-web-node-http-transport')
@@ -34,7 +34,7 @@ class DiscordService extends Service {
     this.bootstrapRetries = 0
     this.bootstrapRetriesMax = 10
 
-    this.bootstrap().catch(e => {
+    this.bootstrap().catch((e) => {
       console.error(`bootstrap failure`, e)
       process.exit(-1)
     })
@@ -44,7 +44,7 @@ class DiscordService extends Service {
     try {
       const ownUser = await this.rpc.ownUser(new Empty(), this.sharedHeaders)
       this.ownUser = ownUser.toObject()
-      
+
       const listGuilds = await this.rpc.listGuilds(new Empty(), this.sharedHeaders)
       this.syncGuilds(listGuilds.toObject().guildsList)
     } catch (e) {
@@ -112,7 +112,7 @@ class DiscordService extends Service {
       q.setGuildid(serverId)
 
       const roles = await this.rpc.getGuildRoles(q, this.sharedHeaders)
-      return roles.toObject().rolesList.filter(role => role.id !== serverId)
+      return roles.toObject().rolesList.filter((role) => role.id !== serverId)
     })
   }
 
@@ -124,11 +124,11 @@ class DiscordService extends Service {
       }
     }
 
-    const matchFor = permissionInt =>
+    const matchFor = (permissionInt) =>
       !!gm.rolesList
-        .map(id => guildRoles.find(role => role.id === id))
-        .filter(x => !!x)
-        .find(role => (role.permissions & permissionInt) === permissionInt)
+        .map((id) => guildRoles.find((role) => role.id === id))
+        .filter((x) => !!x)
+        .find((role) => (role.permissions & permissionInt) === permissionInt)
 
     const isAdmin = guild.ownerid === gm.user.id || matchFor(0x00000008)
     const canManageRoles = isAdmin || matchFor(0x10000000)
@@ -155,6 +155,34 @@ class DiscordService extends Service {
     await this.rpc.updateMember(member, this.sharedHeaders)
   }
 
+  async updateRolesTx(memberObj, { added, removed }) {
+    const roleTx = new RoleTransaction()
+    roleTx.setMember(this.memberToQueryProto(memberObj))
+    
+    for (let toAdd of added) {
+      const delta = new TxDelta()
+      delta.setAction(TxDelta.Action.ADD)
+      delta.setRole(toAdd)
+      roleTx.addDelta(delta)
+    }
+
+    for (let toRemove of removed) {
+      const delta = new TxDelta()
+      delta.setAction(TxDelta.Action.REMOVE)
+      delta.setRole(toRemove)
+      roleTx.addDelta(delta)
+    }
+
+    await this.rpc.updateMemberRoles(roleTx, this.sharedHeaders)
+  }
+
+  memberToQueryProto(member) {
+    const query = new IDQuery()
+    query.setGuildid(member.guildid)
+    query.setMemberid(member.user.id)
+    return query
+  }
+
   memberToProto(member) {
     const memberProto = new Member()
     memberProto.setGuildid(member.guildid)
@@ -224,7 +252,7 @@ class DiscordService extends Service {
   }
 
   async syncGuilds(guilds) {
-    guilds.forEach(guild => this.ctx.server.ensure(guild))
+    guilds.forEach((guild) => this.ctx.server.ensure(guild))
   }
 
   async cacheCurry(key, func) {