Feed 'A' - Assets

Asset prices feed

Requests

Subscribe

{"event": "bind", "feed": "A"}

Unsubscribe

{"event": "unbind", "feed": "A"}

Feed handling

Definitions

asset = {
  "name": string,
  "id": unsigned int32,
  "price": Efx::Price // USD price of the asset
}

Possible updates

// snapshot
['A', 0, 'S', [array of assets]]

// assets added
['A', 0, '+', [array of assets]]

// asset price modified
['A', 0, 'M', [array of assets]]

// assets removed
['A', 0, '-', [array of assets]]

// failed to subscribe
['A', 0, 'Z', 2]

// unsubscribed
['A', 0, 'U', 0]

Feed update example

applyToSnapshot(prevSnapshot, feed, action, data) {
    switch (feed) {
        case 'A': {
            switch (action) {
                case 'S' : {
                    return data
                }
                case '+' : {
                    for (var asset in data) {
                        prevSnapshot[asset[0]] = asset
                    }
                    break
                }
                case 'M' : {
                    for (var asset in data) {
                        prevSnapshot[asset[0]] = asset
                    }
                    break
                }
                case '-' : {
                    for (var asset in data) {
                        prevSnapshot.delete(asset[0])
                    }
                    break
                }
            }
            break
        }   
    }
    return prevSnapshot
}