subscribeAmm

Subscribe to seqenced updates of the target AMM endstate of angstrom for block N + 1. This Stream will only start updating once the pool moves from the current block N state.

Params

This subscription method currently does not accept any filtering parameters. Subscribers will receive all empty block attestations emitted by the connected Angstrom node.

Parameter	Type	Description
pools	HashSet	the set of pool_ids to receive updates for

Request

To subscribe, send a JSON-RPC request to the Angstrom WebSocket endpoint:

wscat -c ws://<ANGSTROM_URL>:<ANGSTROM_PORT>
> {"jsonrpc": "2.0", "id": 1, "method": "angstrom_subscribeAmm", "params": [["0x234241..112"]]}

Response

When an

{
  "jsonrpc": "2.0",
  "method": "angstrom_subscribeAmm",
  "params": {
    "subscription": "SUBSCRIPTION_ID_EXAMPLE_XYZ789",
    "result": {
        // What update this is. There are max 120 updates per block 
        "seq_id":           0,
        "current_block:":   123,
        "angstrom_pool_id": 0x2341,
        "uni_pool_id":      0x21111,
        "liquidity":        49412451353253425,
        "sqrt_price_x96":   12412451353253425,
        "tick":             10040
    }
  }
}

Using the Slot0 data

These updates allow anyone to simulate swapping on the expected angstrom state after a bundle lands.