first pass at adding dm package to indexedDb, split some shared code into utils

indexedDb/channels/implementation.go

@@ -167,7 +167,7 @@ func (w *wasmModel) deleteMsgByChannel(channelID *id.ID) error {
 // user of the API to filter such called by message ID.
 func (w *wasmModel) ReceiveMessage(channelID *id.ID,
 	messageID cryptoChannel.MessageID, nickname, text string,
-	pubKey ed25519.PublicKey, dmToken []byte, codeset uint8,
+	pubKey ed25519.PublicKey, dmToken uint32, codeset uint8,
 	timestamp time.Time, lease time.Duration, round rounds.Round,
 	mType channels.MessageType, status channels.SentStatus) uint64 {
 	textBytes := []byte(text)
@@ -203,7 +203,7 @@ func (w *wasmModel) ReceiveMessage(channelID *id.ID,
 // the initial message. As a result, it may be important to buffer replies.
 func (w *wasmModel) ReceiveReply(channelID *id.ID,
 	messageID cryptoChannel.MessageID, replyTo cryptoChannel.MessageID,
-	nickname, text string, pubKey ed25519.PublicKey, dmToken []byte, codeset uint8,
+	nickname, text string, pubKey ed25519.PublicKey, dmToken uint32, codeset uint8,
 	timestamp time.Time, lease time.Duration, round rounds.Round,
 	mType channels.MessageType, status channels.SentStatus) uint64 {
 	textBytes := []byte(text)
@@ -239,7 +239,7 @@ func (w *wasmModel) ReceiveReply(channelID *id.ID,
 // the initial message. As a result, it may be important to buffer reactions.
 func (w *wasmModel) ReceiveReaction(channelID *id.ID,
 	messageID cryptoChannel.MessageID, reactionTo cryptoChannel.MessageID,
-	nickname, reaction string, pubKey ed25519.PublicKey, dmToken []byte, codeset uint8,
+	nickname, reaction string, pubKey ed25519.PublicKey, dmToken uint32, codeset uint8,
 	timestamp time.Time, lease time.Duration, round rounds.Round,
 	mType channels.MessageType, status channels.SentStatus) uint64 {
 	textBytes := []byte(reaction)
@@ -332,7 +332,7 @@ func (w *wasmModel) UpdateSentStatus(uuid uint64,
 // autoincrement key by default. If you are trying to overwrite an existing
 // message, then you need to set it manually yourself.
 func buildMessage(channelID, messageID, parentID []byte, nickname string,
-	text []byte, pubKey ed25519.PublicKey, dmToken []byte, codeset uint8, timestamp time.Time,
+	text []byte, pubKey ed25519.PublicKey, dmToken uint32, codeset uint8, timestamp time.Time,
 	lease time.Duration, round id.Round, mType channels.MessageType,
 	status channels.SentStatus) *Message {
 	return &Message{