Message reference index - Archer Exchange

Client → server ops

`op`	Required fields	Optional	Purpose
`subscribe`	(`channels` + `market` or `user`)	`marketuser` per keying	Subscribe to market / wallet / global channels
`unsubscribe`	(`channels` + `market` or `user`)		Remove subscriptions
`subscribe_kline`	`resolution`, `market`		Subscribe to trade-price OHLCV (one resolution/market/conn)
`unsubscribe_kline`	`resolution`, `market`		Remove kline sub (`resolution` required by shape, ignored)
`subscribe_mid_kline`	`resolution`, `market`		Subscribe to mid-price OHLCV
`unsubscribe_mid_kline`	`resolution`, `market`		Remove mid-kline sub
`resync`	`market`		Re-send snapshots for all snapshot-bearing channels on that market
`ping`	`ts`		Heartbeat (client-driven); echoed as `pong`
`set_format`	`format` (`"json"` \ `"msgpack"`)		Set outbound wire format for this connection

Server → client op frames (tagged by `op`)

`op`	Fields	Meaning
`subscribed`	`channels`, `market`? / `user`?	Confirms newly-subscribed channels
`subscribed_kline`	`resolution`, `market`	Confirms kline sub (snapshot follows)
`subscribed_mid_kline`	`resolution`, `market`	Confirms mid-kline sub (snapshot follows)
`format_set`	`format`	Confirms wire-format switch (already in the new format)
`pong`	`ts`	Echo of your ping’s `ts`
`reconnect`	`reason`, `delayMs`	Planned drain — reconnect after `delayMs`
`error`	`code`, `message`	Advisory error, does not close the connection

Server → client channel frames (tagged by `ch` + `type`)

`ch`	`type(s)`	Payload shape
`orderbook`	`snapshot`, `delta`	`bidsasks` as `[price, size]`; `sequenceId`, `slot`, `timestamp`
`trades`	`snapshot` (array), `update` (one)	`data`: trade object(s)
`ticker`	`update`	`data`: 24h stats (on-subscribe frame is also `update`)
`kline`	`snapshot`, `update`	`data`: `{time, open, high, low, close, volume}`; `resolution`
`mid_kline`	`snapshot`, `update`	Same as `kline`, mid-price stream
`user_orders`	`placed`, `resized`, `canceled`	`user`, `market`, `data`: LO payload
`user_fills`	`fill`	`user`, `market`, `data`: fill payload (signed `makerFee`)
`limit_orders`	`placed`, `resized`, `canceled`	`market`, `maker`, `data`: LO payload
`mini_tickers`	`update`	`data`: `market → {lastPrice, priceChangePercent24h, volume24h}`
`market_updates`	`listed`, `status_changed`, `delisted`	`data` varies by `type`

Transaction status feed (`wss://send.archer.exchange/v1/ws`)

Same op frames as above for subscribe, unsubscribe, subscribed, ping, pong and error, with one channel:

`ch`	`type(s)`	Payload shape
`tx_status`	`update`	`user`, `data`: the `GET /v1/send/{signature}` body (`signature`, `status`, `slot`, `err`, `reason`, …)

It adds one error code, LAGGED. See Transaction status feed.