如何使用 Paypal 客户端 rest api 创建订阅付款？

Question

Client-side REST integration 文档描述了如何为一件或多件商品创建快速结账。

我如何使用它来创建订阅或定期付款？下面应该如何修改？

 payment: function(data, actions) {
        return actions.payment.create({
            transactions: [
                {
                    amount: { total: '1.00', currency: 'USD' }
                }
            ]
        });
    },

我发现了一个类似的Rest api for Node。不知道在 JS 上会怎样。

Answer 1

首先您需要创建一个计费计划：

billing_plan_attributes = {
                "name": PLAN_NAME_HERE,
                "description": PLAN_DESCRIPTION,
                "merchant_preferences": {
                    "auto_bill_amount": "yes", # yes if you want auto bill 
                    "cancel_url": "http://www.cancel.com", # redirect uri if user cancels payment
                    "initial_fail_amount_action": "continue",
                    "max_fail_attempts": "1",
                    "return_url": RETURN_URL,
                    "setup_fee": {
                        "currency": CURRENCY,
                        "value": VALUE # how much do you want to charge
                    }
                },
                "payment_definitions": [
                    {
                        "amount": {
                            "currency": request.form['currency'],
                            "value": request.form['amount']
                        },

                        "cycles": CYCLES, # how much time this subscription will charge user
                        "frequency": FREQ, # month, day
                        "frequency_interval": INTERVAL, # per month or per three month or so on
                        "name": NAME,
                        "type": TYPE
                    }
                ],
                "type": TYPE
            }
            billing_plan = BillingPlan(billing_plan_attributes)
            if billing_plan.create():
                print("success")

这里使用的属性具有字面意义。现在，由于您已经创建了一个计费计划，您需要为用户提供一些界面，以便他们可以订阅它。下面是一个示例代码：

billing_agreement = BillingAgreement({
            "name": "Organization plan name",
            "description": "Agreement for " + request.args.get('name', ''),
            "start_date": (datetime.now() + timedelta(hours=1)).strftime('%Y-%m-%dT%H:%M:%SZ'),
            "plan": {
                "id": request.args.get('id', '')
            },
            "payer": {
                "payment_method": "paypal"
            },
            "shipping_address": {
                "line1": "StayBr111idge Suites",
                "line2": "Cro12ok Street",
                "city": "San Jose",
                "state": "CA",
                "postal_code": "95112",
                "country_code": "US"
            }
        })
        if billing_agreement.create():
            for link in billing_agreement.links:
                if link.rel == "approval_url":
                    approval_url = link.href

在最后一行中，您将获得可以提供给用户的批准链接。 接下来，您必须设置一个端点，如果用户批准付款，它将作为回调 url。

billing_agreement_response = BillingAgreement.execute(payment_token)

payment_token 由 paypal 发送到您的回调 url。