vendure/packages/dev-server/load-testing/graphql/shop/complete-order.graphql

mutation SetShippingMethod($id: [ID!]!) {
    setOrderShippingMethod(shippingMethodId: $id) {
        ...on Order {
            code
        }
    }
    transitionOrderToState(state: "ArrangingPayment") {
        ...on Order {
            code
        }
    }
    addPaymentToOrder(input: {
        method: "standard-payment",
        metadata: {}
    }) {
        ...on Order {
            code
            state
        }
    }
}