apollo-gateway-subscription/src/utils/subscriptions.ts

Sidecar for subscriptions that work with Apollo Federation/Supergraphs

export function addGatewayDataSourceToSubscriptionContext(
  context,
  gatewayDataSource
) {
  gatewayDataSource.initialize({ context, cache: undefined });
  return { dataSources: { gatewayApi: gatewayDataSource } };
}