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/** Decode a JWT payload (base64url) into a plain object. */
function decodeToken(token: string): Record<string, unknown> {
const payload = token.split('.')[1];
return JSON.parse(Buffer.from(payload, 'base64url').toString()) as Record<string, unknown>;
}
/**
* The client ids this suite registers, by which its leftovers are recognised.
*
* The browser group's two carry a timestamp so that a run's applications are fresh (a
* fresh crockford id is what makes the metering keys fresh), so they can only be matched
* as prefixes - the alternative would be a run that cannot clean up after the one before
* it, which is exactly how these rows came to accumulate.
*/
const REGISTERED_APPLICATION = /^(?:test-app$|http-(?:rate|credit)-)/;
/** Extract the `per` claim (base64 permissionMap) from a JWT. */
function decodePermissionMap(token: string): Buffer {
return Buffer.from(decodeToken(token).per as string, 'base64');
}
/**
* Gateway meter flow — OAuth applications, bundles, subscriptions and the
* atomic rate/credit metering, plus the uniform (jwt-style) authorization of
* application tokens via the existing `access.authorization.list`.
*/
export default handler(
({
lib: {group},
handler: {
loginTokenCreate,
gatewayApplicationRegister,
gatewayBundleMerge,
gatewaySubscriptionMerge,
gatewayApplicationRemove,
gatewaySubscriptionFind,
gatewaySubscriptionRemove,
gatewayDropdownList,
accessAuthorizationList,
gatewayMeterCheck,
gatewayCreditAdjust,
meterLimitReset,
},
}) => ({
testMeterFlow: ({name = 'gateway meter flow'}: {name?: string} = {}) =>
group(name)([
// Remove what this suite registered before registering anything else.
//
// The tap suite shares its database with the Playwright suite, whose
// subscription browse capture holds the *seeded* rows - and a registered
// application is one more active subscription in it. The Playwright backend
// boots this very group before it runs a spec, so cleaning first is what
// leaves the capture looking at the seed. Cleaning at the *start* rather
// than at the end is what a run that fails halfway cannot skip: its rows
// are removed by the next run either way.
//
// The names are the suite's own: this group registers `test-app`, and the
// browser group (`test.meter.http.flow`) registers an application per run
// (`http-rate-<timestamp>` / `http-credit-<timestamp>`), which is why two of
// the three patterns are prefixes. The cleanup lives here rather than in
// both groups because this is the one that runs wherever the suite runs,
// and the groups are started in parallel, so two cleanups would race.
async function cleanupRegistered(assert: IAssert, {$meta}: {$meta: IMeta}) {
const lists = await gatewayDropdownList<
Record<string, {value: string; label: string}[]>
>({}, $meta);
const registered = (lists['gateway.application'] ?? []).filter(option =>
REGISTERED_APPLICATION.test(option.label),
);
let subscriptions = 0;
for (const application of registered) {
// The subscriptions go first: they are the rows a reader sees, and
// their foreign key is not cascaded on every path that deletes an
// application.
const rows = await gatewaySubscriptionFind<{subscriptionId: string}[]>(
{filterBy: {applicationId: application.value}},
$meta,
);
for (const row of rows) {
await gatewaySubscriptionRemove(
{subscriptionId: row.subscriptionId},
$meta,
);
subscriptions += 1;
}
await gatewayApplicationRemove(
{applicationId: application.value},
$meta,
);
}
assert.ok(
true,
`removed ${registered.length} application(s) and ${subscriptions} subscription(s) left by earlier runs`,
);
return {applications: registered.length, subscriptions};
},
// Log in as the seeded developer (testUser) to derive the owner id.
async function loginDeveloper(assert: IAssert, {$meta}: {$meta: IMeta}) {
const result = await loginTokenCreate<{
token_type: string;
access_token: string;
}>({username: 'testUser', password: 'testPassword'}, $meta);
assert.equal(result.token_type, 'Bearer', 'Developer token type is Bearer');
return result;
},
// Register an OAuth application owned by the developer.
async function registerApp(
assert: IAssert,
{
$meta,
loginDeveloper,
}: {$meta: IMeta; loginDeveloper: Awaited<{access_token: string}>},
) {
const {access_token} = await loginDeveloper;
const actorId = String(decodeToken(access_token).sub);
const app = await gatewayApplicationRegister<{
applicationId: string;
clientId: string;
clientSecret: string;
}>({clientId: 'test-app'}, {...$meta, auth: {actorId}});
assert.equal(app.clientId, 'test-app', 'Client id is test-app');
assert.ok(app.clientSecret, 'Client secret returned once');
return {...app, actorId};
},
// Reset any leftover metering state for the app (deterministic runs).
async function resetMeter(
assert: IAssert,
{
$meta,
registerApp,
}: {$meta: IMeta; registerApp: Awaited<{applicationId: string}>},
) {
const app = await registerApp;
const result = await meterLimitReset<{success: boolean}>(
{
applicationId: app.applicationId,
bundleName: 'Vision AI',
clearCredits: true,
},
$meta,
);
assert.equal(result.success, true, 'Metering state reset');
return app;
},
// Merge the demo bundles (roles + capabilities + actions).
async function mergeBundles(assert: IAssert, {$meta}: {$meta: IMeta}) {
const result = await gatewayBundleMerge<{success: boolean}>(
{
bundle: {
'Vision AI': {
roleBit: 100,
capability: 'vision',
actions: 'vision.compute',
baseMonthlyCredits: 1000,
rateLimit: 100,
rateWindowSec: 60,
isActive: true,
},
'Customer API': {
roleBit: 101,
capability: 'customer',
actions: 'customer.get',
baseMonthlyCredits: 500,
rateLimit: 60,
rateWindowSec: 60,
isActive: true,
},
},
},
$meta,
);
assert.equal(result.success, true, 'Bundles merged');
return result;
},
// Subscribe the app to the 'Vision AI' bundle.
async function subscribeApp(assert: IAssert, {$meta}: {$meta: IMeta}) {
const result = await gatewaySubscriptionMerge<{success: boolean}>(
{
subscription: {
testAppVision: {
application: 'test-app',
bundle: 'Vision AI',
status: 'active',
startsAt: '2000-01-01',
},
},
},
$meta,
);
assert.equal(result.success, true, 'Subscription created');
return result;
},
// Mint an OAuth client_credentials token for the application.
async function appToken(
assert: IAssert,
{
$meta,
registerApp,
}: {
$meta: IMeta;
registerApp: Awaited<{clientId: string; clientSecret: string}>;
},
) {
const app = await registerApp;
const result = await loginTokenCreate<{
token_type: string;
access_token: string;
}>(
{
grantType: 'client_credentials',
clientId: app.clientId,
clientSecret: app.clientSecret,
},
$meta,
);
assert.equal(result.token_type, 'Bearer', 'App token type is Bearer');
return {...result, app};
},
// Uniform authorization: access.authorization.list resolves the
// bundle roleBit baked into the app token.
async function uniformAuthorization(
assert: IAssert,
{$meta, appToken}: {$meta: IMeta; appToken: Awaited<{access_token: string}>},
) {
const {access_token} = await appToken;
const permissionMap = decodePermissionMap(access_token);
const actions = await accessAuthorizationList<string[]>({permissionMap}, $meta);
assert.ok(
actions.includes('visionCompute'.toLowerCase()),
'App actions include vision.compute (uniform authorization)',
);
assert.ok(
!actions.includes('customerGet'.toLowerCase()),
'App actions exclude customer.get (cross-bundle)',
);
return {actions};
},
// Meter a vision.compute call (creditCost 5): first request.
async function meterFirst(
assert: IAssert,
{
$meta,
appToken,
}: {$meta: IMeta; appToken: Awaited<{app: {applicationId: string}}>},
) {
const {app} = await appToken;
const decision = await gatewayMeterCheck<{
allowed: boolean;
reason: string;
creditsRemaining: number;
rateLimit: number;
}>(
{bundle: 'Vision AI', creditCost: 5},
{...$meta, auth: {actorId: app.applicationId}},
);
assert.equal(decision.allowed, true, 'First metered call allowed');
assert.equal(
decision.creditsRemaining,
1000 - 5,
'Credits decremented by creditCost',
);
assert.ok(decision.rateLimit >= 1, 'Rate limit header data present');
return decision;
},
// Meter again: balance continues to decrease atomically.
async function meterSecond(
assert: IAssert,
{
$meta,
appToken,
}: {$meta: IMeta; appToken: Awaited<{app: {applicationId: string}}>},
) {
const {app} = await appToken;
const decision = await gatewayMeterCheck<{
allowed: boolean;
creditsRemaining: number;
}>(
{bundle: 'Vision AI', creditCost: 5},
{...$meta, auth: {actorId: app.applicationId}},
);
assert.equal(decision.allowed, true, 'Second metered call allowed');
assert.equal(
decision.creditsRemaining,
1000 - 10,
'Credits decremented atomically across calls',
);
return decision;
},
// Cross-bundle scope block: app is not subscribed to 'Customer'.
async function meterCrossBundleBlocked(
assert: IAssert,
{
$meta,
appToken,
}: {$meta: IMeta; appToken: Awaited<{app: {applicationId: string}}>},
) {
const {app} = await appToken;
const decision = await gatewayMeterCheck<{
allowed: boolean;
reason: string;
}>(
{bundle: 'Customer API', creditCost: 1},
{...$meta, auth: {actorId: app.applicationId}},
);
assert.equal(decision.allowed, false, 'Cross-bundle request blocked');
assert.equal(decision.reason, 'subscription', 'Block reason is subscription');
return decision;
},
// Mid-month credit scaling via HINCRBY.
async function adjustCredits(
assert: IAssert,
{
$meta,
appToken,
}: {$meta: IMeta; appToken: Awaited<{app: {applicationId: string}}>},
) {
const {app} = await appToken;
const result = await gatewayCreditAdjust<{balance: number}>(
{applicationId: app.applicationId, delta: 500},
$meta,
);
assert.ok(result.balance >= 500, 'Credits scaled up mid-month');
return result;
},
]),
}),
);
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