Class: Payment::Apis::Paypal

Inherits:
BaseService
  • Object
show all
Includes:
Singleton
Defined in:
app/services/payment/apis/paypal.rb

Overview

Thin wrapper around the PayPal REST APIs (Orders v2, Payments v2,
Invoicing v2, Vault v3). Holds a singleton-cached OAuth access token
under a mutex so concurrent workers share a refresh, and exposes
class-level convenience methods used by Gateways::Paypal
and Gateways::PaypalInvoice.

Constant Summary collapse

TOKEN_EXPIRY_BUFFER = 
60.seconds

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Paypal

Returns a new instance of Paypal.



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# File 'app/services/payment/apis/paypal.rb', line 15

def initialize
  options = {
    user: Heatwave::Configuration.fetch(:paypal, :client_id),
    pass: Heatwave::Configuration.fetch(:paypal, :client_secret)
  }
  @client = HTTP.basic_auth(**options)
  @token = nil
  @token_expires_at = nil
  @token_mutex = Mutex.new
end

Instance Attribute Details

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'app/services/payment/apis/paypal.rb', line 13

def client
  @client
end

Class Method Details

.authed_client(headers: {}) ⇒ HTTP::Client

HTTP client with the cached OAuth access token applied. Caller
may layer additional headers.

Parameters:

  • headers (Hash{String=>String}) (defaults to: {}) —

    extra headers to merge

Returns:

  • (HTTP::Client) 


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# File 'app/services/payment/apis/paypal.rb', line 438

def self.authed_client(headers: {})
  HTTP.auth("Bearer #{fetch_token}")
       .headers('Content-Type' => 'application/json')
       .headers(headers)
end

.authorize_order(order_id) ⇒ Hash

Authorize a created Orders v2 order (the second leg of the JS SDK
buy-button flow).

Parameters:

  • order_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 145

def self.authorize_order(order_id)
  post_json("/v2/checkout/orders/#{order_id}/authorize", {},
            idempotent: true, headers: { 'Prefer' => 'return=representation' })
end

.cancel_invoice(invoice_id) ⇒ Hash

Cancel an open hosted invoice and notify both parties.

Parameters:

  • invoice_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 264

def self.cancel_invoice(invoice_id)
  post_json("/v2/invoicing/invoices/#{invoice_id}/cancel", {
    send_to_invoicer: true,
    send_to_recipient: true
  })
end

.capture_authorization(authorization_id, amount: nil, currency: nil, final_capture: true, invoice_id: nil, note_to_payer: nil, soft_descriptor: nil) ⇒ Hash

Capture (in whole or part) against a PayPal authorization.

Parameters:

  • authorization_id (String)
  • amount (BigDecimal, Numeric, nil) (defaults to: nil) —

    partial-capture amount

  • currency (String, nil) (defaults to: nil)
  • final_capture (Boolean) (defaults to: true) —

    release remaining auth on success

  • invoice_id (String, nil) (defaults to: nil) —

    truncated to 127 chars

  • note_to_payer (String, nil) (defaults to: nil) —

    truncated to 255 chars

  • soft_descriptor (String, nil) (defaults to: nil) —

    truncated to 22 chars

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 175

def self.capture_authorization(authorization_id, amount: nil, currency: nil, final_capture: true,
                                invoice_id: nil, note_to_payer: nil, soft_descriptor: nil)
  payload = { final_capture: final_capture }
  if amount.present? && currency.present?
    payload[:amount] = { currency_code: currency, value: format('%.2f', amount) }
  end
  payload[:invoice_id] = invoice_id.to_s.truncate(127) if invoice_id.present?
  payload[:note_to_payer] = note_to_payer.to_s.truncate(255) if note_to_payer.present?
  payload[:soft_descriptor] = soft_descriptor.to_s.truncate(22) if soft_descriptor.present?
  post_json("/v2/payments/authorizations/#{authorization_id}/capture", payload,
            idempotent: true, headers: { 'Prefer' => 'return=representation' })
end

.capture_order(order_id) ⇒ Hash

Capture a created Orders v2 order whose intent was CAPTURE.

Parameters:

  • order_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 154

def self.capture_order(order_id)
  post_json("/v2/checkout/orders/#{order_id}/capture", {}, idempotent: true)
end

.client ⇒ HTTP::Client

Returns underlying HTTP.rb client with basic auth
pre-applied (used to fetch OAuth tokens).

Returns:

  • (HTTP::Client) —

    underlying HTTP.rb client with basic auth
    pre-applied (used to fetch OAuth tokens)



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# File 'app/services/payment/apis/paypal.rb', line 33

def self.client
  instance.client
end

.create_invoice(request) ⇒ Object

========================================
Invoicing API v2



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# File 'app/services/payment/apis/paypal.rb', line 243

def self.create_invoice(request)
  post_json("/v2/invoicing/invoices", request)
end

.create_order(amount:, currency:, intent: 'AUTHORIZE', line_items: [], shipping: nil, shipping_amount: nil, tax_amount: nil, subtotal: nil, description: nil, buyer_email: nil, metadata: {}, vault_on_success: false) ⇒ Object

========================================
Orders API v2



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# File 'app/services/payment/apis/paypal.rb', line 51

def self.create_order(amount:, currency:, intent: 'AUTHORIZE', line_items: [], shipping: nil,
                      shipping_amount: nil, tax_amount: nil, subtotal: nil, description: nil,
                      buyer_email: nil, metadata: {}, vault_on_success: false)
  items = line_items.map do |li|
    {
      name: li[:name].to_s.truncate(127),
      sku: li[:sku].to_s.truncate(127),
      quantity: li[:quantity].to_s,
      unit_amount: { currency_code: currency, value: format('%.2f', li[:amount]) }
    }
  end

  breakdown = {}
  breakdown[:item_total] = { currency_code: currency, value: format('%.2f', subtotal) } if subtotal
  breakdown[:shipping] = { currency_code: currency, value: format('%.2f', shipping_amount) } if shipping_amount
  breakdown[:tax_total] = { currency_code: currency, value: format('%.2f', tax_amount) } if tax_amount

  purchase_unit = {
    amount: {
      currency_code: currency,
      value: format('%.2f', amount),
      breakdown: breakdown.presence
    }.compact
  }
  purchase_unit[:items] = items if items.any?
  purchase_unit[:description] = description if description.present?
  purchase_unit[:shipping] = shipping if shipping.present?
  purchase_unit[:custom_id] = metadata[:order_id].to_s if metadata[:order_id].present?
  purchase_unit[:invoice_id] = metadata[:invoice_id].to_s if metadata[:invoice_id].present?

  payload = {
    intent: intent,
    purchase_units: [purchase_unit]
  }

  payload[:application_context] = { shipping_preference: "SET_PROVIDED_ADDRESS" } if shipping.present?

  if vault_on_success
    payload[:payment_source] = {
      paypal: {
        attributes: {
          vault: {
            store_in_vault: "ON_SUCCESS",
            usage_type: "MERCHANT",
            customer_type: "CONSUMER"
          }
        }
      }
    }
  end

  post_json("/v2/checkout/orders", payload, idempotent: true)
end

.create_order_from_vault(vault_id:, amount:, currency:, intent: 'AUTHORIZE', description: nil, metadata: {}) ⇒ Hash

Create a PayPal Orders v2 order using a stored vault token instead
of a freshly approved order from the JS SDK.

Parameters:

  • vault_id (String) —

    PayPal vault payment-method-token id

  • amount (BigDecimal, Numeric)
  • currency (String)
  • intent (String) (defaults to: 'AUTHORIZE') —

    usually 'AUTHORIZE' or 'CAPTURE'

  • description (String, nil) (defaults to: nil)
  • metadata (Hash{Symbol=>Object}) (defaults to: {}) —

    :order_id / :invoice_id

Returns:

  • (Hash) —

    parsed PayPal response



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# File 'app/services/payment/apis/paypal.rb', line 115

def self.create_order_from_vault(vault_id:, amount:, currency:, intent: 'AUTHORIZE', description: nil, metadata: {})
  purchase_unit = {
    amount: { currency_code: currency, value: format('%.2f', amount) }
  }
  purchase_unit[:description] = description if description.present?
  purchase_unit[:custom_id] = metadata[:order_id].to_s if metadata[:order_id].present?
  purchase_unit[:invoice_id] = metadata[:invoice_id].to_s if metadata[:invoice_id].present?

  payload = {
    intent: intent,
    purchase_units: [purchase_unit],
    payment_source: {
      token: { type: "PAYMENT_METHOD_TOKEN", id: vault_id }
    }
  }

  post_json("/v2/checkout/orders", payload, idempotent: true)
end

.create_vault_payment_token(setup_token_id) ⇒ Hash

Exchange an approved setup token for a permanent vault
payment-method token.

Parameters:

  • setup_token_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 318

def self.create_vault_payment_token(setup_token_id)
  post_json("/v3/vault/payment-tokens", {
    payment_source: {
      token: { id: setup_token_id, type: "SETUP_TOKEN" }
    }
  }, idempotent: true)
end

.create_vault_setup_token(return_url:, cancel_url:) ⇒ Object

========================================
Vault API v3 — Payment Method Tokens



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# File 'app/services/payment/apis/paypal.rb', line 290

def self.create_vault_setup_token(return_url:, cancel_url:)
  post_json("/v3/vault/setup-tokens", {
    payment_source: {
      paypal: {
        usage_type: "MERCHANT",
        experience_context: {
          return_url: return_url,
          cancel_url: cancel_url
        }
      }
    }
  }, idempotent: true)
end

.delete_vault_payment_token(token_id) ⇒ Hash{String=>Object}

Delete a stored vault token.

Parameters:

  • token_id (String)

Returns:

  • (Hash{String=>Object}) —

    _http_status/_http_success



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# File 'app/services/payment/apis/paypal.rb', line 338

def self.delete_vault_payment_token(token_id)
  response = authed_client.delete("#{hostname}/v3/vault/payment-tokens/#{token_id}")
  { '_http_status' => response.status.code, '_http_success' => response.status.success? }
end

.fetch_token ⇒ Object

Thread-safe OAuth token refresh. Uses double-checked locking on the
singleton's mutex so concurrent callers don't each issue a separate
token request (which both wastes API quota and leaves the loser's
token written second, racing the @token_expires_at update).

The cached-token check uses a local snapshot of BOTH @token and
@token_expires_at - calling inst.token_valid? would re-read the live
ivars and could disagree with the previously-snapshotted cached
value if another thread refreshed between the two reads. Without this,
a cold-start caller could see cached=nil but a fresh token_valid? and
return nil to the caller.



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# File 'app/services/payment/apis/paypal.rb', line 401

def self.fetch_token
  inst = instance

  cached_token, cached_expires_at = snapshot_token(inst)
  return cached_token if cached_token_valid?(cached_token, cached_expires_at)

  inst.token_mutex.synchronize do
    cached_token, cached_expires_at = snapshot_token(inst)
    return cached_token if cached_token_valid?(cached_token, cached_expires_at)

    response = client.post("#{hostname}/v1/oauth2/token", body: "grant_type=client_credentials").parse
    token = response["access_token"]
    raise "PayPal OAuth token request failed: #{response.except('access_token').inspect}" if token.blank?
    expires_in = response["expires_in"].to_i

    inst.instance_variable_set(:@token, token)
    inst.instance_variable_set(:@token_expires_at, Time.current + expires_in.seconds - TOKEN_EXPIRY_BUFFER)

    token
  end
end

.generate_id_token(customer_id: nil) ⇒ Object

========================================
ID Token for JS SDK vault flows



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# File 'app/services/payment/apis/paypal.rb', line 346

def self.generate_id_token(customer_id: nil)
  body = "grant_type=client_credentials&response_type=id_token"
  body += "&target_customer_id=#{customer_id}" if customer_id.present?

  response = client.post("#{hostname}/v1/oauth2/token", body: body).parse
  token = response["id_token"]
  Rails.logger.error("[PayPal] ID token request failed: #{response.inspect}") if token.blank?
  token
end

.get_authorization(authorization_id) ⇒ Object

========================================
Payments API v2 – Authorizations



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# File 'app/services/payment/apis/paypal.rb', line 161

def self.get_authorization(authorization_id)
  get_json("/v2/payments/authorizations/#{authorization_id}")
end

.get_authorization_details(payment) ⇒ Object

========================================
Backward-compatible aliases (used by Payment model)



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# File 'app/services/payment/apis/paypal.rb', line 359

def self.get_authorization_details(payment)
  response = get_authorization(payment.authorization_code)
  OpenStruct.new(response.merge('parse' => response))
end

.get_capture(capture_id) ⇒ Object

========================================
Payments API v2 – Captures & Refunds



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# File 'app/services/payment/apis/paypal.rb', line 217

def self.get_capture(capture_id)
  get_json("/v2/payments/captures/#{capture_id}")
end

.get_invoice(invoice_id) ⇒ Hash

Returns parsed Invoicing v2 invoice.

Parameters:

  • invoice_id (String)

Returns:

  • (Hash) —

    parsed Invoicing v2 invoice



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# File 'app/services/payment/apis/paypal.rb', line 283

def self.get_invoice(invoice_id)
  get_json("/v2/invoicing/invoices/#{invoice_id}")
end

.get_invoice_details(invoice_id) ⇒ OpenStruct

Backward-compatible shim for callers expecting an OpenStruct-like
invoice response with to_s and status accessors.

Parameters:

  • invoice_id (String)

Returns:

  • (OpenStruct) 


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# File 'app/services/payment/apis/paypal.rb', line 369

def self.get_invoice_details(invoice_id)
  response = get_invoice(invoice_id)
  OpenStruct.new(response.merge('to_s' => response.to_json, 'status' => response.dig('status')))
end

.get_json(path) ⇒ Hash

GET path and parse the JSON body.

Parameters:

  • path (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 463

def self.get_json(path)
  response = authed_client.get("#{hostname}#{path}")
  parse_response(response)
end

.get_order(order_id) ⇒ Hash

Returns parsed Orders v2 response.

Parameters:

  • order_id (String)

Returns:

  • (Hash) —

    parsed Orders v2 response



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# File 'app/services/payment/apis/paypal.rb', line 136

def self.get_order(order_id)
  get_json("/v2/checkout/orders/#{order_id}")
end

.get_transaction_details(auth) ⇒ Object

========================================
Reporting



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# File 'app/services/payment/apis/paypal.rb', line 377

def self.get_transaction_details(auth)
  tx_id = auth.authorization_code
  sd = (auth.created_at - 1.day).strftime('%Y-%m-%dT%H:%M:%S%z')
  ed = (auth.created_at + 1.hour).strftime('%Y-%m-%dT%H:%M:%S%z')
  get_json("/v1/reporting/transactions?transaction_id=#{tx_id}&start_date=#{sd}&end_date=#{ed}&sync_mode=false&fields=all")
end

.get_vault_setup_token(setup_token_id) ⇒ Hash

Read back a vault setup token after the customer has approved it
in the JS SDK flow.

Parameters:

  • setup_token_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 309

def self.get_vault_setup_token(setup_token_id)
  get_json("/v3/vault/setup-tokens/#{setup_token_id}")
end

.hostname ⇒ String

Returns PayPal API hostname (sandbox vs live).

Returns:

  • (String) —

    PayPal API hostname (sandbox vs live)



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# File 'app/services/payment/apis/paypal.rb', line 38

def self.hostname
  Heatwave::Configuration.fetch(:paypal, :hostname)
end

.list_vault_payment_tokens(customer_id) ⇒ Hash

List vault tokens stored on a PayPal customer.

Parameters:

  • customer_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 330

def self.list_vault_payment_tokens(customer_id)
  get_json("/v3/vault/payment-tokens?customer_id=#{customer_id}")
end

.merchant_email ⇒ String

Returns PayPal merchant email used as the invoicer on
hosted invoices.

Returns:

  • (String) —

    PayPal merchant email used as the invoicer on
    hosted invoices



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# File 'app/services/payment/apis/paypal.rb', line 44

def self.merchant_email
  Heatwave::Configuration.fetch(:paypal, :email)
end

.parse_response(response) ⇒ Hash

Parse a PayPal HTTP response into a hash that always carries
_http_status and _http_success so callers can branch without
holding the raw HTTP::Response.

Parameters:

  • response (HTTP::Response)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 474

def self.parse_response(response)
  body = response.body.to_s
  parsed = body.present? ? JSON.parse(body) : {}
  parsed['_http_status'] = response.status.code
  parsed['_http_success'] = response.status.success?
  parsed
rescue JSON::ParserError
  { '_http_status' => response.status.code, '_http_success' => response.status.success?, '_raw_body' => body }
end

.post_json(path, payload, idempotent: false, headers: {}) ⇒ Hash

POST payload as JSON. Adds a PayPal-Request-Id header on
idempotent endpoints so retries don't double-charge.

Parameters:

  • path (String) —

    PayPal API path beginning with /

  • payload (Hash)
  • idempotent (Boolean) (defaults to: false)
  • headers (Hash{String=>String}) (defaults to: {})

Returns:



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# File 'app/services/payment/apis/paypal.rb', line 452

def self.post_json(path, payload, idempotent: false, headers: {})
  extra_headers = headers.dup
  extra_headers['PayPal-Request-Id'] = SecureRandom.uuid if idempotent
  response = authed_client(headers: extra_headers).post("#{hostname}#{path}", json: payload)
  parse_response(response)
end

.reauthorize_authorization(authorization_id, amount: nil, currency: nil) ⇒ Hash

Reauthorize an expiring PayPal authorization for a new amount.

Parameters:

  • authorization_id (String)
  • amount (BigDecimal, Numeric, nil) (defaults to: nil)
  • currency (String, nil) (defaults to: nil)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 205

def self.reauthorize_authorization(authorization_id, amount: nil, currency: nil)
  payload = {}
  if amount.present? && currency.present?
    payload[:amount] = { currency_code: currency, value: format('%.2f', amount) }
  end
  post_json("/v2/payments/authorizations/#{authorization_id}/reauthorize", payload,
            idempotent: true, headers: { 'Prefer' => 'return=representation' })
end

.refund_capture(capture_id, amount: nil, currency: nil, invoice_id: nil, note_to_payer: nil) ⇒ Hash

Refund (full or partial) a captured PayPal payment.

Parameters:

  • capture_id (String)
  • amount (BigDecimal, Numeric, nil) (defaults to: nil) —

    omit for full refund

  • currency (String, nil) (defaults to: nil)
  • invoice_id (String, nil) (defaults to: nil)
  • note_to_payer (String, nil) (defaults to: nil)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 229

def self.refund_capture(capture_id, amount: nil, currency: nil, invoice_id: nil, note_to_payer: nil)
  payload = {}
  if amount.present? && currency.present?
    payload[:amount] = { currency_code: currency, value: format('%.2f', amount) }
  end
  payload[:invoice_id] = invoice_id.to_s.truncate(127) if invoice_id.present?
  payload[:note_to_payer] = note_to_payer.to_s.truncate(255) if note_to_payer.present?
  post_json("/v2/payments/captures/#{capture_id}/refund", payload,
            idempotent: true, headers: { 'Prefer' => 'return=representation' })
end

.remind_invoice(invoice_id) ⇒ Hash

Send a "please pay" reminder for an open hosted invoice.

Parameters:

  • invoice_id (String)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 275

def self.remind_invoice(invoice_id)
  post_json("/v2/invoicing/invoices/#{invoice_id}/remind", {
    send_to_invoicer: true
  })
end

.send_invoice(invoice_id, send_to_invoicer: true, send_to_recipient: true) ⇒ Hash

Send a draft hosted invoice to the customer.

Parameters:

  • invoice_id (String)
  • send_to_invoicer (Boolean) (defaults to: true)
  • send_to_recipient (Boolean) (defaults to: true)

Returns:

  • (Hash) 


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# File 'app/services/payment/apis/paypal.rb', line 253

def self.send_invoice(invoice_id, send_to_invoicer: true, send_to_recipient: true)
  post_json("/v2/invoicing/invoices/#{invoice_id}/send", {
    send_to_invoicer: send_to_invoicer,
    send_to_recipient: send_to_recipient
  })
end

.void_authorization(authorization_id) ⇒ Hash{Symbol=>Object}

Void a PayPal authorization. Returns a slim status hash because
the void endpoint responds with no body.

Parameters:

  • authorization_id (String)

Returns:

  • (Hash{Symbol=>Object}) —

    { success: Boolean, status: Integer }



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# File 'app/services/payment/apis/paypal.rb', line 193

def self.void_authorization(authorization_id)
  response = authed_client(headers: { 'PayPal-Request-Id' => SecureRandom.uuid })
               .post("#{hostname}/v2/payments/authorizations/#{authorization_id}/void")
  { success: response.status.success?, status: response.status.code }
end

Instance Method Details

#token_mutex ⇒ Mutex

Returns singleton-scoped mutex used to serialize OAuth refresh.

Returns:

  • (Mutex) —

    singleton-scoped mutex used to serialize OAuth refresh



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# File 'app/services/payment/apis/paypal.rb', line 27

def token_mutex
  @token_mutex
end

#token_valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/payment/apis/paypal.rb', line 384

def token_valid?
  @token.present? && @token_expires_at.present? && Time.current < @token_expires_at
end