Sandbox recipe

1. The clock tools and their second credential

Two headers on every call

Every call needs two headers: X-Game-Secret-Key (your sandbox game key) and X-Sandbox-Clock-Key, a separate per-game credential. Get it from the sandbox developer console: open the game, Game Settings, the “Sandbox clock key” card; the key (ivclk_...) is generated the first time you reveal it. The same card rotates it (7-day grace by default, or immediately for a leaked key). It is issued with your console session, never with the game key: a leaked game secret must not also be a charge-on-demand button.

• A missing, wrong or never-issued clock key is always 401 SANDBOX_CLOCK_UNAUTHORIZED; the message points you to the console. A missing or wrong game key gives the ordinary game-key error first.
• Keep the clock key out of game clients and source control. It has no effect outside sandbox.
• Rate limit: 10 per minute per (game, subscription); 60 per minute per IP (429 RATE_LIMITED).
• Every clock response includes a subscription (and where relevant before) block with the clock fields: status, period_seq, current_period_start, current_period_end, next_charge_at, trial_end, cancel_at_period_end, wallet_only, has_payment_method, amount_usd.

import { InvoServer } from "@invonetwork/web-sdk/server";

const invo = new InvoServer({
  gameSecret: process.env.INVO_GAME_SECRET!,          // the SANDBOX game key
  baseUrl: "https://sandbox.invo.network/sandbox",
  sandboxClockKey: process.env.INVO_SANDBOX_CLOCK_KEY, // ivclk_...; test harness only
});
// invo.sandbox.subscriptions.advanceClock(id, intervals)
// invo.sandbox.subscriptions.forceRenewal(id)
// invo.sandbox.subscriptions.forceFailure(id, outcome)
// invo.sandbox.subscriptions.forceAuthChallenge(id)

const SANDBOX = "https://sandbox.invo.network/sandbox";

async function clock(id, tool, body) {
  const res = await fetch(SANDBOX + "/subscriptions/" + id + "/" + tool, {   // no /api
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-Game-Secret-Key": process.env.INVO_GAME_SECRET,
      "X-Sandbox-Clock-Key": process.env.INVO_SANDBOX_CLOCK_KEY,
    },
    body: body === undefined ? undefined : JSON.stringify(body),
  });
  return { status: res.status, json: await res.json().catch(() => ({})) };
}

import os
from invonetwork import InvoServer

invo = InvoServer(
    game_secret=os.environ["INVO_GAME_SECRET"],            # the SANDBOX game key
    base_url="https://sandbox.invo.network/sandbox",
    sandbox_clock_key=os.environ["INVO_SANDBOX_CLOCK_KEY"], # ivclk_...; test harness only
)
# invo.sandbox.subscriptions.advance_clock(id, intervals)
# invo.sandbox.subscriptions.force_renewal(id)
# invo.sandbox.subscriptions.force_failure(id, outcome)
# invo.sandbox.subscriptions.force_auth_challenge(id)

import os, requests

SANDBOX = "https://sandbox.invo.network/sandbox"

def clock(sub_id, tool, body=None):
    r = requests.post(f"{SANDBOX}/subscriptions/{sub_id}/{tool}",        # no /api
                      headers={"Content-Type": "application/json",
                               "X-Game-Secret-Key": os.environ["INVO_GAME_SECRET"],
                               "X-Sandbox-Clock-Key": os.environ["INVO_SANDBOX_CLOCK_KEY"]},
                      json=body, timeout=60)
    try:
        return r.status_code, r.json()
    except ValueError:
        return r.status_code, {}

2. advance-clock

Body: {"intervals": 1} (0 to 60, default 1; 400 INVALID_INTERVALS).

• intervals: 0 makes the subscription due now without moving its window. Use it to trigger a retry immediately.
• intervals: N makes it due now and, on a subscription that has never been paid (a trial, or a fresh row), moves the window back by up to N intervals so elapsed windows are forgiven. Once anything has been paid the window stays put (intervals_applied_to_window: 0); the due marker alone is the advance, and the next renewal bills the next window. No window is ever billed twice.

200
{"status": "ok", "action": "advance-clock", "intervals": 1, "intervals_applied_to_window": 0,
 "window_moved": false, "before": {...}, "after": {...}, "window_already_elapsed": false,
 "note": "The subscription is now due. ..."}

409 SUBSCRIPTION_NOT_LIVE on a terminal or pending row; 409 WINDOW_ALREADY_PAID if the window is somehow behind the paid boundary (create a fresh subscription).

curl -sS -X POST "https://sandbox.invo.network/sandbox/subscriptions/$SUB/advance-clock" \
  -H "X-Game-Secret-Key: $GAME_SECRET" \
  -H "X-Sandbox-Clock-Key: $INVO_SANDBOX_CLOCK_KEY" \
  -H "Content-Type: application/json" \
  -d '{"intervals": 1}'

const adv = await invo.sandbox.subscriptions.advanceClock(subId, 1);   // 0 = due now, window untouched
// adv.after.nextChargeAt is now in the past; the next engine run (or forceRenewal) bills it

const adv = await clock(subId, "advance-clock", { intervals: 1 });

adv = invo.sandbox.subscriptions.advance_clock(sub_id, 1)   # 0 = due now, window untouched

status, adv = clock(sub_id, "advance-clock", {"intervals": 1})

3. force-renewal

No body. Runs the real money path: wallet read, shortfall, card charge (or the Steam stand-in), mint, spend, split, subscription.renewed, and on failure the real dunning.

200
{"status": "ok", "action": "force-renewal", "period_seq": 2, "attempt_no": 1,
 "amount_usd": "9.99", "amount_coins": "99.90",
 "engine_stats": {"renewed": 1},
 "subscription": {...}}

engine_stats counters you may see: renewed, declined, insufficient, auth_required, ambiguous, containment, settle_failed, errors, abandoned, refused_over_ceiling; on Steam also steam_charged, steam_pending, steam_refused, steam_failed, steam_canceled_by_steam, sandbox_synthetic.

curl -sS -X POST "https://sandbox.invo.network/sandbox/subscriptions/$SUB/force-renewal" \
  -H "X-Game-Secret-Key: $GAME_SECRET" \
  -H "X-Sandbox-Clock-Key: $INVO_SANDBOX_CLOCK_KEY"

const run = await invo.sandbox.subscriptions.forceRenewal(subId);
// run.engineStats.renewed === 1 on success; run.periodSeq; run.subscription.status

const run = await clock(subId, "force-renewal");
// run.json.engine_stats, run.json.period_seq; 409 PERIOD_TOO_FAR_AHEAD means: advance the clock first

run = invo.sandbox.subscriptions.force_renewal(sub_id)
# run.engine_stats.renewed == 1 on success

status, run = clock(sub_id, "force-renewal")
# run["engine_stats"], run["period_seq"]; 409 PERIOD_TOO_FAR_AHEAD means: advance the clock first

4. force-failure and force-auth-challenge

force-failure body: {"outcome": "card_declined" | "insufficient_funds" | "error", "failure_code": "<up to 100 chars>", "failure_message": "<text>"} (outcome defaults to card_declined; 400 INVALID_OUTCOME). Returns retry_budget_used, retry_schedule_days (for example [2, 3, 2]), retries_remaining and the subscription. Call it four times to walk a subscription from active through past_due to expired and watch the events.

force-auth-challenge body: {"failure_message": "<text>"} (optional). Moves the subscription to awaiting_authentication and returns auth_challenges_used, max_auth_challenges (2) and downgraded_to_decline. It does not mint a confirmation link; use a real challenge (a test card that requires authentication, then force-renewal) to exercise the link and the subscription.authentication_required event. 409 AUTH_CHALLENGE_OPEN if one is already open.

curl -sS -X POST "https://sandbox.invo.network/sandbox/subscriptions/$SUB/force-failure" \
  -H "X-Game-Secret-Key: $GAME_SECRET" \
  -H "X-Sandbox-Clock-Key: $INVO_SANDBOX_CLOCK_KEY" \
  -H "Content-Type: application/json" \
  -d '{"outcome": "card_declined"}'

curl -sS -X POST "https://sandbox.invo.network/sandbox/subscriptions/$SUB/force-auth-challenge" \
  -H "X-Game-Secret-Key: $GAME_SECRET" \
  -H "X-Sandbox-Clock-Key: $INVO_SANDBOX_CLOCK_KEY"

for (let i = 0; i < 4; i++) {
  const f = await invo.sandbox.subscriptions.forceFailure(subId, "card_declined");
  console.log(f.subscription.status, f.retriesRemaining);   // past_due 3, past_due 2, past_due 1, expired 0
}
const c = await invo.sandbox.subscriptions.forceAuthChallenge(freshSubId);
// c.subscription.status === "awaiting_authentication"

for (let i = 0; i < 4; i++) {
  const { json } = await clock(subId, "force-failure", { outcome: "card_declined" });
  console.log(json.subscription.status, json.retries_remaining);
}
const { json: c } = await clock(freshSubId, "force-auth-challenge", {});

for _ in range(4):
    f = invo.sandbox.subscriptions.force_failure(sub_id, "card_declined")
    print(f.subscription.status, f.retries_remaining)   # past_due 3, past_due 2, past_due 1, expired 0
c = invo.sandbox.subscriptions.force_auth_challenge(fresh_sub_id)
# c.subscription.status == "awaiting_authentication"

for _ in range(4):
    _, f = clock(sub_id, "force-failure", {"outcome": "card_declined"})
    print(f["subscription"]["status"], f["retries_remaining"])
_, c = clock(fresh_sub_id, "force-auth-challenge", {})

5. Card road recipe

1. Make the sandbox game live in the console and register a webhook URL (Webhooks); fire the test event.
2. Create the player if needed (a purchase, or any endpoint that creates players), then save a card with POST /api/currency-purchases/setup-intent using payment_method_id: "pm_card_visa" (immediate success) or pm_card_threeDSecure2Required (returns requires_action; complete it on the client and call /setup-intent/confirm). Expect card.id.
3. POST /api/subscriptions/subscribe with that player_card_id. Expect 201, first_charge.status: "paid", first_charge.paid_period_seq: 1, subscription.period_seq: 2, paid_through set, and a subscription.renewed delivery with period_seq: 1.
4. Replay the same body. Expect 200, idempotent_replay: true, the same first_charge.
5. advance-clock then force-renewal. Expect engine_stats.renewed: 1, period_seq: 3 on the subscription, subscription.renewed with period_seq: 2. Repeat the pair for as many periods as you like.
6. force-failure four times (or replace the card with pm_card_chargeDeclined through /payment-method, then advance-clock and force-renewal four times). Expect past_due after the first, payment_failed on each, past_due once, expired with final_period_end on the fourth.
7. On a fresh subscription, force-auth-challenge. Expect awaiting_authentication; then advance-clock with intervals: 0 and force-renewal to see the challenge lapse into ordinary dunning.
8. POST .../amount with a new price, advance-clock, force-renewal. Expect the old price on that renewal and the new price on the next.
9. POST .../cancel with at_period_end: true, then advance-clock and force-renewal. Expect action: "retired-at-period-end" and status canceled.
10. POST .../refund on a paid period. Expect a receipt and subscription.refunded.
11. Create a subscription with trial_days: 7. Expect skipped_trial; advance-clock with intervals: 1 then force-renewal. Expect period_seq to move past the trial window and a paid period 2.

const created = await invo.subscriptions.create({
  clientRequestId: "sandbox-run-" + Date.now(),
  playerEmail: "member@example.com", playerName: "Member Seven",
  itemId: "guild-42-membership", amountUsd: "9.99", playerCardId: cardId,
});
const id = created.subscription.subscriptionId;
console.log(created.firstCharge.status, created.firstCharge.paidPeriodSeq);   // paid 1

for (let i = 0; i < 3; i++) {
  await invo.sandbox.subscriptions.advanceClock(id, 1);
  const run = await invo.sandbox.subscriptions.forceRenewal(id);
  console.log(run.periodSeq, run.engineStats);                               // 2 {renewed:1}, 3 ..., 4 ...
}

for (let i = 0; i < 4; i++) {
  const f = await invo.sandbox.subscriptions.forceFailure(id, "card_declined");
  console.log(f.subscription.status, f.retriesRemaining);
}
// expect: subscription.expired delivered with final_period_end = the last paid boundary

created = invo.subscriptions.create(
    client_request_id=f"sandbox-run-{int(time.time())}",
    player_email="member@example.com", player_name="Member Seven",
    item_id="guild-42-membership", amount_usd="9.99", player_card_id=card_id,
)
sub_id = created.subscription.subscription_id
print(created.first_charge.status, created.first_charge.paid_period_seq)   # paid 1

for _ in range(3):
    invo.sandbox.subscriptions.advance_clock(sub_id, 1)
    run = invo.sandbox.subscriptions.force_renewal(sub_id)
    print(run.period_seq, run.engine_stats)                                  # 2 {renewed:1}, 3 ..., 4 ...

for _ in range(4):
    f = invo.sandbox.subscriptions.force_failure(sub_id, "card_declined")
    print(f.subscription.status, f.retries_remaining)
# expect: subscription.expired delivered with final_period_end = the last paid boundary

6. Steam road recipe

1. Have the title enabled for Steam in the sandbox console (Steam app id and publisher key, verified, in sandbox mode; billing set up). Use the primary key or the steam channel key.
2. POST /api/subscriptions/steam/init with a real Steam id. Expect 201 pending_steam_authorization, amount_coins for the member’s country, steam_order_id and steam_transid. Call it again with the same terms: expect the same row back with pending_reuse: true.
3. POST /api/subscriptions/steam/finalize. Expect 200, first_charge.status: "paid", first_charge.paid_period_seq: 1, subscription.period_seq: 2, funding_rail: "steam", steam_agreement_status: "active", sandbox_auto_approved: true, and subscription.renewed with period_seq: 1, funding.rail: "steam" and funding.steam_charged_usd equal to the price.
4. advance-clock then force-renewal. Expect engine_stats.steam_charged: 1 and sandbox_synthetic: 1, and subscription.renewed with funding.steam_charged_usd for the shortfall only.
5. Credit the member’s wallet above the price (a sandbox currency purchase), advance-clock, force-renewal. Expect steam_charged_usd: "0.00".
6. POST .../amount with a higher price: 409 STEAM_REAUTHORIZATION_REQUIRED. With a lower price: staged. POST .../payment-method: 409 NOT_A_CARD_SUBSCRIPTION.
7. POST .../refund on the Steam-charged period 1: 409 STEAM_REFUND_NOT_SUPPORTED. On the wallet-covered period from step 5: a receipt with funding_shape: "wallet".
8. POST .../cancel in both modes. Expect steam_agreement_status: "canceled" on the response.
9. force-failure does not model a Steam refusal; use it only to exercise your dunning handlers. A pending row you never finalize expires after 24 hours with subscription.expired and failure_code: "steam_authorization_abandoned".

const init = await invo.subscriptions.steamInit({
  clientRequestId: "sandbox-steam-" + Date.now(),
  playerEmail: "member@example.com", playerName: "Member Seven",
  itemId: "guild-42-membership", amountUsd: "9.99",
  steamid: "76561198000000000", usersession: "client",
});
console.log(init.amountCoins, init.steamOrderId);                 // "69" for a US member

const done = await invo.subscriptions.steamFinalize(init.subscriptionId);
console.log(done.firstCharge.paidPeriodSeq, done.subscription.periodSeq, done.sandboxAutoApproved);   // 1 2 true

await invo.sandbox.subscriptions.advanceClock(init.subscriptionId, 1);
const run = await invo.sandbox.subscriptions.forceRenewal(init.subscriptionId);
console.log(run.engineStats);                                     // { steam_charged: 1, sandbox_synthetic: 1 }

init = invo.subscriptions.steam_init(
    client_request_id=f"sandbox-steam-{int(time.time())}",
    player_email="member@example.com", player_name="Member Seven",
    item_id="guild-42-membership", amount_usd="9.99",
    steamid="76561198000000000", usersession="client",
)
print(init.amount_coins, init.steam_order_id)                     # "69" for a US member

done = invo.subscriptions.steam_finalize(init.subscription_id)
print(done.first_charge.paid_period_seq, done.subscription.period_seq, done.sandbox_auto_approved)   # 1 2 True

invo.sandbox.subscriptions.advance_clock(init.subscription_id, 1)
run = invo.sandbox.subscriptions.force_renewal(init.subscription_id)
print(run.engine_stats)                                           # {steam_charged: 1, sandbox_synthetic: 1}