see how this different reactions format goes...

d2m/actions/add-reaction.js

@@ -22,7 +22,7 @@ async function addReaction(data) {
    assert.equal(typeof parentID, "string")
 	const roomID = await createRoom.ensureRoom(data.channel_id)
 	const senderMxid = await registerUser.ensureSimJoined(user, roomID)
-	const eventID = api.sendEvent(roomID, "m.reaction", {
+	const eventID = await api.sendEvent(roomID, "m.reaction", {
       "m.relates_to": {
          rel_type: "m.annotation",
          event_id: parentID,

d2m/actions/edit-message.js

@@ -12,10 +12,7 @@ const api = sync.require("../../matrix/api")
  * @param {import("discord-api-types/v10").APIGuild} guild
  */
 async function editMessage(message, guild) {
-	console.log(`*** applying edit for message ${message.id} in channel ${message.channel_id}`)
 	const {roomID, eventsToRedact, eventsToReplace, eventsToSend, senderMxid} = await editToChanges.editToChanges(message, guild, api)
-	console.log("making these changes:")
-	console.dir({eventsToRedact, eventsToReplace, eventsToSend}, {depth: null})
 
 	// 1. Replace all the things.
 	for (const {oldID, newContent} of eventsToReplace) {

m2d/actions/add-reaction.js

@@ -18,10 +18,12 @@ async function addReaction(event) {
 	// no need to sync the matrix member to the other side. but if I did need to, this is where I'd do it
 
 	let emoji = event.content["m.relates_to"].key // TODO: handle custom text or emoji reactions
-	emoji = encodeURIComponent(emoji)
-	emoji = emoji.replace(/%EF%B8%8F/g, "")
+	let encoded = encodeURIComponent(emoji)
+	let encodedTrimmed = encoded.replace(/%EF%B8%8F/g, "")
 
-	return discord.snow.channel.createReaction(channelID, messageID, emoji)
+	console.log("add reaction from matrix:", emoji, encoded, encodedTrimmed)
+
+	return discord.snow.channel.createReaction(channelID, messageID, encoded)
 }
 
 module.exports.addReaction = addReaction