One-shot Pine example

//@version=6
indicator("Liftx one-shot demo", overlay = true)

// PRIVATE: this script contains a restricted credential. Never publish/share it.
// Fixed target: link 17, instrument COPY_EXACT_CATALOG_ID.
// The chart supplies signal data; it cannot change this fixed trading target.
// One key is one ordered producer: use a separate setup/key for another alert
// or independent strategy. The same running alert can reuse its key for cycles.
// Never mix this Pine alert with an ordinary OPEN/EXIT alert pair on this key.
// Use an approved demo link. Prepare while disabled; enable only after Liftx
// webhook activation. Set future times in the chart's timezone, then create
// ONE alert: this indicator / Any alert() function call / Liftx webhook URL.
// Changing chart inputs does not update the server's frozen alert copy.
// Never restart/recreate an alert with this setup. Use a new Liftx setup instead.

const int liftxCredentialExpiresAt = 1000
string liftxOpenRequest = ""

// Termination selection does not change the setup's immutable opening policy.
// "One strategy position" uses the exact retained lifecycle reference.
// "This strategy’s positions" includes earlier unresolved cycles from this key.
// "All positions in this market" includes manual and other strategies' Liftx
// positions on the fixed link/instrument and requires the explicit setup grant.
string liftxTerminateSelection = input.string("One strategy position", "On a termination signal", options = ["One strategy position", "This strategy’s positions"])
string liftxTerminateTarget = liftxTerminateSelection == "One strategy position" ? "position" : liftxTerminateSelection == "This strategy’s positions" ? "strategy" : ""
if liftxTerminateTarget == ""
    runtime.error("Invalid termination target. Do not widen scope; use an authorized selection.")

// Every intent uses this one envelope; group targets omit position references.
liftxMessage(string action, string positionRef, int positionStarted, int sequence, int issued, string requestJSON, string target = "position") =>
    string commandID = "11111111-1111-4111-8111-111111111111:" + str.tostring(sequence) + ":" + action
    string message = "{\"token\":\"REPLACE_WITH_RESTRICTED_TRADINGVIEW_KEY\",\"command\":{\"client_command_id\":" + '"' + commandID + '"'
    message += ',"issued_at":' + str.tostring(issued) + ',"expires_at":' + str.tostring(issued + 60)
    message += ',"action":"' + action + '"' + ",\"exchange_link_id\":17,\"instrument_id\":\"COPY_EXACT_CATALOG_ID\",\"source_instance_id\":\"11111111-1111-4111-8111-111111111111\",\"binding_revision\":1"
    message += ',"target":"' + target + '"'
    message += target == "position" ? ',"client_position_id":"' + positionRef + '","position_started_at":' + str.tostring(positionStarted) : ""
    message += ',"sequence":' + str.tostring(sequence)
    message += (requestJSON == "" ? "" : ',"request":' + requestJSON) + '}}'
    message

// Create the alert before OPEN time. Keep its expiration after TERMINATE time.
bool liftxEnabled = input.bool(false, "Enable one-shot demo", tooltip = "Sends one OPEN and one TERMINATE signal. No execution feedback or automatic retry.")
int liftxOpenAt = input.time(0, "OPEN time (chart timezone)")
int liftxTerminateAt = input.time(0, "TERMINATE time (chart timezone)")
const string liftxPositionRef = "11111111-1111-4111-8111-111111111111:one-shot"
int liftxPositionStarted = int(liftxOpenAt / 1000)

// Signal phases only: 0 idle, 1 waiting, 2 OPEN emitted, 3 TERMINATE emitted,
// 4 OPEN window missed. No phase means accepted, filled, canceled, or flat.
// varip retains state across realtime ticks and bars, not script restarts.
varip int liftxPhase = 0
varip int liftxSequence = 0

if barstate.isrealtime and liftxEnabled
    if timenow >= liftxCredentialExpiresAt
        runtime.error("Credential expired. Signals have stopped; inspect Liftx and manage remaining orders or exposure there.")
    if liftxPhase == 0
        if liftxOpenAt <= timenow or liftxTerminateAt < liftxOpenAt + 60000 or liftxTerminateAt >= liftxCredentialExpiresAt
            runtime.error("Choose a future OPEN time and a TERMINATE time at least 60 seconds later, before credential expiry. After interruption, stop the alert and inspect Liftx; do not restart it.")
        liftxPhase := 1
    if liftxPhase == 1 and timenow >= liftxOpenAt
        if timenow >= liftxOpenAt + 60000
            liftxPhase := 4
        else
            liftxSequence += 1
            liftxPhase := 2
            alert(liftxMessage("open", liftxPositionRef, liftxPositionStarted, liftxSequence, int(timenow / 1000), liftxOpenRequest), alert.freq_all)
    else if liftxPhase == 2 and timenow >= liftxTerminateAt
        liftxSequence += 1
        liftxPhase := 3
        alert(liftxMessage("terminate", liftxPositionRef, liftxPositionStarted, liftxSequence, int(timenow / 1000), "", liftxTerminateTarget), alert.freq_all)

// Realtime updates drive both signals; this is not a wall-clock scheduler.
// No automatic rearm or restart recovery.
plot(liftxPhase, "Local signal phase (not execution)", display = display.data_window)

// Missing updates, credential expiry, stopped alerts, or delivery failure can
// prevent termination. Signal state never means accepted, filled, canceled or flat.
// The chart's local state is independent of the server alert and its delivery.
// After an interruption, stop the alert and inspect Activity AND the actual
// positions in Liftx. Manage remaining orders and exposure there.