This repository is no longer actively maintained, we have a new SDK for node.js at voucherifyio/voucherify-js-sdk. Check migration guide.

Official Voucherify SDK for Node.js

---

Migration to 2.x Migration to 4.x | Setup | Callback or Promise? | Error handling | Contributing | Changelog

API: Vouchers | Campaigns | Distributions | Validations | Redemptions | Customers | Consents | Orders | Products | Rewards | Loyalties | Segments | Validation Rules | Promotions | Events | Utils

---

Setup

npm install voucherify --save

Log-in to Voucherify web interface and obtain your Application Keys from Configuration:

const voucherifyClient = require('voucherify')

const client = voucherifyClient({
    applicationId: 'YOUR-APPLICATION-ID',
    clientSecretKey: 'YOUR-CLIENT-SECRET-KEY'
})

Optionally, you can add apiVersion to the client options if you want to use a specific API version.

const client = voucherifyClient({
    applicationId: 'YOUR-APPLICATION-ID',
    clientSecretKey: 'YOUR-CLIENT-SECRET-KEY',
    apiVersion: 'v2017-04-20'
})

API Endpoint

Optionally, you can add apiUrl to the client options if you want to use Voucherify running in a specific region.

const client = voucherifyClient({
    applicationId: 'YOUR-APPLICATION-ID',
    clientSecretKey: 'YOUR-CLIENT-SECRET-KEY',
    apiUrl: 'https://<region>.api.voucherify.io'
})

Callback or Promise?

All methods in the SDK provide both callback based as well as promise based interactions. If you want to use callback just pass it as a last parameter. For example:

client.vouchers.get('v1GiJYuuS', (error, result) => {
    if (error) {
        // handle error
        return
    }

    // do the work
})

If you prefer to use promises then the code goes like this:

client.vouchers.get('v1GiJYuuS')
    .then((result) => {
        console.log(result)
    })
    .catch((error) => {
        console.error("Error: %s", error)
    })

All other examples in the readme use promises but they could be as well written with callbacks.

API

This SDK is fully consistent with restful API Voucherify provides. You will find detailed description and example responses at official docs. Method headers point to more detailed descriptions of params you can use.

Vouchers API

Methods are provided within client.vouchers.* namespace.

• Create Voucher
• Get Voucher
• Update Voucher
• Delete Voucher
• Add Gift Voucher Balance
• List Vouchers
• Enable Voucher
• Disable Voucher
• Import Vouchers
• Examine Vouchers Qualification

Create Voucher

client.vouchers.create(voucher)

Check voucher object.

Get Voucher

client.vouchers.get(code)

Update Voucher

client.vouchers.update(voucher)

Delete Voucher

client.vouchers.delete(code)
client.vouchers.delete(code, {force: true})

List Vouchers

client.vouchers.list()
client.vouchers.list(params)

Enable Voucher

client.vouchers.enable()
client.vouchers.enable(code)

Disable Voucher

client.vouchers.disable()
client.vouchers.disable(code)

Import Vouchers

client.vouchers.import(vouchers)

Add Gift Voucher Balance

client.vouchers.balance.create(code, {amount})

Examine Vouchers Qualification

client.vouchers.qualifications.examine(bodyParams)
client.vouchers.qualifications.examine(bodyParams, queryParams)
// Example
client.vouchers.qualifications.examine({}, {audienceRulesOnly: true, limit: 10})

---

Campaigns API

Methods are provided within client.campaigns.* namespace.

• Create Campaign
• Update Campaign
• Get Campaign
• Add Voucher to Campaign
• Import Vouchers to Campaign
• List Campaigns
• Examine Campaigns Qualification

Create Campaign

client.campaigns.create(campaign)

Update Campaign

Method will update only fields passed to campaign argument.

client.campaigns.update(campaignId, campaign)
client.campaigns.update(campaignName, campaign)

[Delete Campaign]

client.campaigns.delete(campaignName)
client.campaigns.delete(campaignName, {force: true})

Get Campaign

client.campaigns.get(name)

Add Voucher to Campaign

client.campaigns.addVoucher(campaignName)
client.campaigns.addVoucher(campaignName, params)

Import Vouchers to Campaign

client.campaigns.importVouchers(campaignName, vouchers, callback)

List Campaigns

Since API version: v2017-04-20.

client.campaigns.list()
client.campaigns.list(params)

Examine Campaigns Qualification

client.campaigns.qualifications.examine(bodyParams)
client.campaigns.qualifications.examine(bodyParams, queryParams)
// Example
client.campaigns.qualifications.examine({}, {audienceRulesOnly: true, limit: 10})

---

Distributions API

Methods are provided within client.distributions.* namespace.

• Publish Voucher
• Create Export
• Get Export
• Delete Export
• List publications
• Create publication

Publish Voucher

client.distributions.publish(params)

Create Export

client.distributions.exports.create(exportObject)

Check the export object.

Get Export

client.distributions.exports.get(exportId)

Delete Export

client.distributions.exports.delete(exportId)

List publications

client.distributions.publications.list()
client.distributions.publications.list(params)

[Create publication]

client.distributions.publications.create(params)

---

Validations API

Methods are provided within client.validations.* namespace.

• Validate Voucher
• Validate Promotion Campaign

Validate Voucher

client.validations.validateVoucher(code)
client.validations.validateVoucher(code, params)

// or

client.validations.validate(code)
client.validations.validate(code, params)

Validate Promotion Campaign

client.validations.validate(params)

---

Redemptions API

Methods are provided within client.redemptions.* namespace.

• Redeem Voucher
• Redeem Promotion's Tier
• Redeem Loyalty Card
• List Redemptions
• Get Voucher's Redemptions
• Rollback Redemption

Redeem Voucher

client.redemptions.redeem(code)
client.redemptions.redeem(code, params)

// Deprecated!
client.redemptions.redeem({code, ...params})
client.redemptions.redeem({code, ...params}, tracking_id)
client.redemptions.redeem(code, tracking_id) // use: client.redemptions.redeem(code, {customer: {source_id}})

Redeem Loyalty Card

client.redemptions.redeem(loyaltyCardId, params)

List Redemptions

client.redemptions.list()
client.redemptions.list(params)

Get Voucher's Redemptions

client.redemptions.getForVoucher(code)

Rollback Redemption

client.redemptions.rollback(redemptionId)
client.redemptions.rollback(redemptionId, params)
client.redemptions.rollback(redemptionId, reason)

Check redemption rollback object.

---

Promotions API

Methods are provided within client.promotions.* namespace.

• Create Promotion Campaign
• Validate Promotion Campaign
• List Promotion's Tiers
• List All Promotion Tiers
• Create Promotion's Tier
• Redeem Promotion's Tier
• Update Promotion's Tier
• Delete Promotion's Tier

Check promotion campaign object.

Create Promotion Campaign

client.promotions.create(promotionCampaign)

Validate Promotion Campaign

client.promotions.validate(validationContext)

List Promotion's Tiers

client.promotions.tiers.list(promotionCampaignId)

Check promotion's tier object

List All Promotion Tiers

client.promotions.tiers.listAll()
client.promotions.tiers.listAll({ is_available: true })
client.promotions.tiers.listAll({ page: 2, limit: 10 })

You can list all currently available promotions by specifying is_available flag.

Create Promotion's Tier

client.promotions.tiers.create(promotionId, promotionsTier)

Redeem Promotion's Tier

client.promotions.tiers.redeem(promotionsTierId, redemptionContext)

Update Promotion's Tier

client.promotions.tiers.update(promotionsTier)

Delete Promotion's Tier

client.promotions.tiers.delete(promotionsTierId)

---

Customers API

Methods are provided within client.customers.* namespace.

• Create Customer
• Get Customer
• Update Customer
• Delete Customer
• List Customers
• Update Customer's Consents

Create Customer

client.customers.create(customer)

Check customer object.

Get Customer

client.customers.get(customerId)

Update Customer

customer object must contain id or source_id.

client.customers.update(customer)

Delete Customer

client.customers.delete(customerId)

List Customers

client.customers.list()
client.customers.list(params)

[Scroll through customers]

Standard list customers API has limitation of available pages to be shown equal to 100. To cover cases when you would like to fetch more, you must use scroll capabilities.

async function () {
  for await (const customer of client.customers.scroll(params)) {
    console.log('Customer', customer)
  }
}

params argument is consistent with list method. Keep in mind scroll doesn't support callback version.

You can optionally define scrolling cursor based on customer creation date using property starting_after. By default returned customers are in descending order, if you want to change it to ascending define order equal to create_at.

async function () {
  for await (const customer of client.customers.scroll({
    starting_after: "2020-01-01", // optional
    order: "create_at" // optional (by default order is "-create_at" which corresponds to descending).
    ...params})
  ) {
    console.log('Customer', customer)
  }
}

Keep in mind this operation may drain your API call limits fairly quickly. In the hood it fetches customers in max possible batches of 100. So in example if you have 100'000 customers scroll over all of them, you will use 1000 API calls.

Update Customer's Consents

client.customers.updateConsents(customer, consents)

---

Consents API

Methods are provided within client.consents.* namespace.

• List Customers

You can update Customer's consents in Customer namespace.

List Consents

client.consents.list()

---

Orders API

Methods are provided within client.orders.* namespace.

• Create Order
• Get Order
• Update Order
• List Orders

Create Order

client.orders.create(order)

Check the order object.

Get Order

client.orders.get(orderId)

Update Order

client.orders.update(order)

List Orders

client.orders.list()
client.orders.list(params)

---

Products API

Methods are provided within client.products.* namespace.

• Create Product
• Get Product
• Update Product
• Bulk Update Products
• Delete Product
• List Products
• Create SKU
• Get SKU
• Update SKU
• Delete SKU
• List all product SKUs

Create Product

client.products.create(product)

Check product object.

Get Product

client.products.get(productId)

Update Product

client.products.update(product)

Bulk Update Products

client.products.bulkUpdate(products)

Delete Product

client.products.delete(productId)
client.products.delete(productId, {force: true})

List Products

client.products.list()
client.products.list(params)

Create SKU

client.products.createSku(productId, sku)

Check SKU object.

Get SKU

client.products.getSku(productId, skuId)

Update SKU

client.products.updateSku(productId, sku)

Delete SKU

client.products.deleteSku(productId, skuId)
client.products.deleteSku(productId, skuId, {force: true})

List all product SKUs

client.products.listSkus(productId)

---

Rewards API

Methods are provided within client.rewards.* namespace.

• Create Reward
• Get Reward
• Update Reward
• Delete Reward
• List Rewards
• Create Reward Assignment
• Update Reward Assignment
• Delete Reward Assignment
• List Reward Assignments

Create Reward

client.rewards.create(reward)

Check reward object.

Get Reward

client.rewards.get(rewardId)

Update Reward

client.rewards.update(reward)

Delete Reward

client.rewards.delete(rewardId)

List Rewards

client.rewards.list()
client.rewards.list(params)

Create Reward Assignment

client.rewards.createAssignment(rewardId, assignment)

Check reward assignment object.

Update Reward Assignment

client.rewards.updateAssignment(rewardId, assignment)

[Delete Reward Assignment]

client.rewards.deleteAssignment(rewardId, assignmentId)

List Reward Assignments

client.rewards.listAssignments(rewardId)
client.rewards.listAssignments(rewardId, params)

---

Loyalties API

Methods are provided within client.loyalties.* namespace.

• Create Loyalty
• Get Loyalty
• Update Loyalty
• Delete Loyalty
• List Loyalties
• Create Loyalty Reward Assignment
• Update Loyalty Reward Assignment
• Delete Loyalty Reward Assignment
• List Loyalty Reward Assignments
• Create Loyalty Earning Rules
• Update Loyalty Earning Rule
• Delete Loyalty Earning Rule
• List Loyalty Earning Rules
• Create Loyalty Member
• Get Loyalty Member
• List Loyalty Members
• Get Member Activites
• Add Points
• Redeem reward

[Create Loyalty]

client.loyalties.create(campaign)

[Get Loyalty]

client.loyalties.get(campaignId)

[Update Loyalty]

client.loyalties.update(campaign)

[Delete Loyalty]

client.loyalties.delete(campaignId)

[List Loyalties]

client.loyalties.list()
client.loyalties.list(params)

Create Loyalty Reward Assignment

client.loyalties.createRewardAssignments(campaignId, assignment)

Update Loyalty Reward Assignment

client.loyalties.updateRewardAssignment(campaignId, assignment)

Delete Loyalty Reward Assignment

client.loyalties.deleteRewardAssignment(campaignId, assignmentId)

List Loyalty Reward Assignments

client.loyalties.listRewardAssignments(campaignId)
client.loyalties.listRewardAssignments(campaignId, params)

Create Loyalty Earning Rules

client.loyalties.createEarningRule(campaignId, earningRules)

Update Loyalty Earning Rule

client.loyalties.updateEarningRule(campaignId, earningRule)

Delete Loyalty Earning Rule

client.loyalties.deleteEarningRule(campaignId, earningRuleId)

List Loyalty Earning Rules

client.loyalties.listEarningRules(campaignId)
client.loyalties.listEarningRules(campaignId, params)

Create Loyalty Member

client.loyalties.createMember(campaignId, member)

Get Loyalty Member

client.loyalties.getMember(campaignId, memberId)

List Loyalty Members

client.loyalties.listMembers(campaignId)
client.loyalties.listMembers(campaignId, params)

Get Member Activities

client.loyalties.getMemberActivities(campaignId, memberId)

Add Loyalty Card Balance

client.loyalties.addPoints(campaignId, memberId, balance)

Redeem Loyalty Card

client.loyalties.redeemReward(campaignId, memberId, reward)

---

Segments API

Methods are provided within client.segments.* namespace.

• Create Segment
• Get Segment
• Delete Segment

Create Segment

client.segments.create(segment)

Check the segment object.

Get Segment

client.segments.get(segmentId)

Delete Segment

client.segments.delete(segmentId)

---

Validation Rules API

Methods are provided within client.validationRules.* namespace.

• Create Rule
• Get Rule
• Update Rule
• Delete Rule
• Create Rule Assignment
• Delete Rule Assignment
• List Rules
• List Rule Assignments
• Validate Validation Rule

Create Validation Rule

client.validationRules.create(validationRule)

Check validation rule object.

Get Validation Rule

client.validationRules.get(validationRuleId)

Update Validation Rule

client.validationRules.update(validationRule)

Delete Validation Rule

client.validationRules.delete(validationRuleId)

Create Rule Assignment

client.validationRules.createAssignment(validationRuleId, assignment)

Delete Rule Assignment

client.validationRules.deleteAssignment(validationRuleId, assignmentId)

List Rules

client.validationRules.list()
client.validationRules.list(params)

List Rule Assignments

client.validationRules.listAssignments(validationRuleId)
client.validationRules.listAssignments(validationRuleId, params)

[Validate Validation Rule]

client.validationRules.validate(validationRuleId)
client.validationRules.validate(validationRuleId, params)

---

Events API

Methods are provided within client.events.* namespace.

• Create Event

[Create event]

Check customer object.

client.events.create(eventName, { customer })
client.events.create(eventName, { customer, metadata })
client.events.create(eventName, { customer, referral, metadata })
client.events.create(eventName, { customer, referral, loyalty, metadata })

---

Migration to 2.x

Version 2.x of the SDK is fully backward compatible with version 1.x. Changes made in version 2.x mostly relate to grouping methods within namespaces. So all you need to do is to follow the list bellow and just replace deprecated methods with their namespaced equivalent.

We also recommend to adopt voucher redemption method, and don't use deprecated invocation.

Migration to 4.x

This version introduces few major changes:

• drops support for node.js v4 and v6
• drops methods previously marked as deprecated, to make transition easier please check table below. All those methods were already available in v3.x.

Previously	Currently
client.events.track(eventName, metadata, customer)	client.events.create(eventName, { customer, metadata })
client.list(params)	client.vouchers.list(query)
client.get(voucherCode)	client.vouchers.get(code)
client.create(voucher)	client.vouchers.create(voucher)
client.update(voucher)	client.vouchers.update(voucher)
client.delete(voucherCode, [params])	client.vouchers.delete(code, params)
client.disable(voucherCode)	client.vouchers.disable(code)
client.enable(voucherCode)	client.vouchers.enable(code)
client.campaign.voucher.create(campaignName)	client.campaigns.addVoucher(campaignName, voucher)
`client.publish(campaign_name	params)`
client.validate(voucherCode, params)	client.validations.validateVoucher(code, params)
client.redemption(voucherCode)	client.redemptions.getForVoucher(code)
`client.redeem(voucherCode, tracking_id	params)`
client.redemptions(query)	client.redemptions.list(query)
client.rollback(redemptionId, params)	client.redemptions.rollback(redemptionId, data)
client.customer.*	changed namespace to client.customers.*
client.product.*	changed namespace to client.products.*
client.product.sku.*	changed namespace to client.products.*

---

Utils

const utils = require('voucherify/utils')

Utils don't need callbacks nor promises. They return results immediately.

Available methods

• utils.calculatePrice(basePrice, voucher)
• utils.calculateDiscount(basePrice, voucher)
• utils.webhooks.verifySignature(signature, message, secretKey)

Error handling

Depending what you have choose error object of rejected Promise or first argument of provided callback has consistent structure, described in details in our API reference.

Contributing

Bug reports and pull requests are welcome through GitHub Issues.

Changelog

• 2020-09-17 - 5.2.0
  • Add support Get Member Activities in Loyality API
  • enhancement: throw error objects instead of object literals (@AbdelrahmanHafez)
  • dependency update
  • Add support for listing all promotion tiers
  • Add support for listing consents
• 2020-05-28 - 5.1.0
  • adopted API changes in customer scrolling, dropping support for ending_before property. This is technically breaking change but we didn't officially released this feature in API so exceptionally we will increase minor version to not confuse SDK users.
• 2020-05-25 - 5.0.0
  • [breaking change] Drop support for Node v8
  • Add a way to scroll over customers
  • Add support for bulk update of products
• 2020-04-06 - 4.2.0 - Add support for Updating Customer's consents
• 2020-02-03 - 4.1.0 - expose campaigns and vouchers Qualification API methods
• 2019-11-22 - 4.0.0
  • Added support for new method
    • Distributions
      • Publications
        • Create
  • [breaking change] - dropped support for node.js v4 and v6
• 2019-06-19 - 3.0.0 - Added support for custom API endpoint, that allows to connect to projects created in specific Voucherify region.
• 2019-05-27 - 2.23.0 - Added support for the methods related to the Loyalty Programs
  • Rewards
    • List
    • Create
    • Get
    • Update
    • Delete
    • Assignments
      • List
      • Create
      • Update
      • Delete
  • Loyalties
    • List
    • Create
    • Get
    • Update
    • Delete
    • Reward Assignments
      • List
      • Create
      • Update
      • Delete
    • Earning Rules
      • List
      • Create
      • Update
      • Delete
    • Members
      • List
      • Create
      • Get
      • Add points
      • Redeem reward
  • Events.create method in Events namespace
  • Add methods to delete campaign
• 2019-03-27 - 2.22.0 - Added Validation Rules validate method client.validationRules.validate(ruleId, params)
• 2018-12-28 - 2.21.0
  • Switch Validation Rules to new model: Business Validation Rules:
    • Validation Rule Object - structure reorganized to handle advanced rules
    • Validation Rule Assignment Object - added object describing a relation between rules and linked promotions
    • Validation Rules - modified​ data model
• 2018-11-19 - 2.20.0 - Allow updating products and SKUs with given source id
• 2018-11-07 - 2.19.0 - Allow to update order with source id client.orders.update({source_id, ...rest})
• 2018-10-26 - 2.18.0 - Add Update Campaign method client.campaigns.update(campaignId, campaign)
• 2018-10-22 - 2.17.0
  • Add example of using the filters parameter in the method for listing campaigns
  • Allow zero discount in calc utils
• 2018-08-01 - 2.16.0 - Fix reported vulnerabilities (#77)
• 2018-06-14 - 2.15.0 - Fixed the way string errors are handled
• 2018-03-14 - 2.14.0 - Added util method to Verify Webhooks signature
• 2018-01-21 - 2.13.1 - Remove outdated client.distributions.publish(campaignName) method interface
• 2017-12-06 - 2.13.0
  • Fix voucher validation vulnerability
  • Allow to force delete Products and SKUs
  • Add Clients listing
• 2017-11-16 - 2.12.0
  • Expose Promotions API
  • Update Redemptions and Validations namespace
• 2017-10-24 - 2.11.0 - Expose Events API - track events done by the customers
• 2017-09-14 - 2.10.0
  • Expose Segments API
  • Expose Orders API
  • Expose Exports API
  • Expose Publications list
• 2017-08-29 - 2.8.0
  • Expose Campaigns listing
• 2017-08-29 - 2.7.0
  • Allow to update Customer by source ID when ID not provided
• 2017-08-09 - 2.6.0
  • Add Validation Rules namespace with CRUD methods
  • Add Balance namespace with support of Add Gift Voucher Balance method
• 2017-04-21 - 2.5.0 - Add option to override channel.
• 2017-04-21 - 2.4.0 - Add option to select specific API version.
• 2017-02-20 - 2.3.0 - Add support for node-v0.10
• 2017-02-10 - 2.1.1 - Bugfix missing Object.assign implementation (touched node-v0.12)
• 2017-02-01 - 2.1.0 - Added support for bulk enable/disable vouchers
• 2016-12-02 - 2.0.0 - Rewritten SDK, added missing API methods, updated README. Backward capability is provided but we strongly recommend to follow the migration from version 1.x
• 2016-12-01 - 1.23.2 - Support gift vouchers in utils
• 2016-11-15 - 1.23.1 - Validate init options
• 2016-10-26 - 1.23.0 - Error handling improved - passing error object in response to rejected request
• 2016-10-03 - 1.22.0 - Added customer parameter to the rollback method
• 2016-10-03 - 1.21.1 - Updated documentation according to changes in Publish API method
• 2016-09-16 - 1.21.0 - Added method for adding new vouchers to existing campaign
• 2016-09-15 - 1.20.0 - Added method for deleting vouchers by code
• 2016-09-01 - 1.19.0 - Documentation for evaluating validation rules based on order details
• 2016-08-03 - 1.18.1 - Improvements in documentation of SKU API
• 2016-08-02 - 1.18.0 - Implemented new API methods
  • SKU
    • Create
    • Get
    • Update
    • Delete
• 2016-08-02 - 1.17.0 - Validate voucher
• 2016-07-29 - 1.16.0 - Implemented new API methods
  • Product
    • Create
    • Get
    • Update
    • Delete
• 2016-07-18 - 1.15.0 - Voucher update method.
• 2016-06-22 - 1.14.1 - Gift vouchers.
• 2016-06-16 - 1.14.0 - Unified naming convention
• 2016-06-08 - 1.13.0 - Implemented new API methods
  • Customer
    • Create
    • Get
    • Update
    • Delete
• 2016-06-01 - 1.12.0 - tracking_id param removed from redemption rollback method.
• 2016-05-24 - 1.11.0 - New publish structure.
• 2016-04-26 - 1.10.0 - Rollback redemption.
• 2016-04-19 - 1.9.1 - Filter vouchers and redemptions by customer.
• 2016-04-08 - 1.9.0 - Added methods to create, disable and enable a voucher.
• 2016-04-07 - 1.8.0 - List redemptions with filtering.
• 2016-04-04 - 1.7.1 - Updated API URL.
• 2016-03-08 - 1.7.0 - List vouchers with filtering.
• 2016-01-22 - 1.6.0 - Added publish voucher method.
• 2015-12-10 - 1.5.0 - New discount model. Added UNIT - a new discount type.
• 2015-11-23 - 1.4.1 - Added X-Voucherify-Channel header.
• 2015-11-10 - 1.4.0 - Add VoucherifyUtils which includes calculatePrice for computing product/cart price after discount and calculateDiscount.
• 2015-11-05 - 1.3.2 - Updated Readme to snake case naming convention
• 2015-10-13 - 1.3.1 - Fixed Readme
• 2015-10-12 - 1.3.0 - Changed API after Voucherify's API change
  • use --> redeem
  • usage --> redemption
• 2015-09-25 - 1.2.0 - Ability to track a detailed customer profile that uses a voucher.
• 2015-09-24 - 1.1.2 - Small fixes in logging.
• 2015-09-11 - 1.1.1 - Updated backend URL.
• 2015-08-13 - 1.1.0 - Ability to track use voucher operation.
  • Properly handling voucher codes with not URL-friendly characters.
• 2015-07-09 - 1.0.1 - Returning to old API URL.
• 2015-07-03 - 1.0.0 - Switching API URL.
• 2015-07-03 - 0.2.0 - Adding promises support.
  • You can either:
    • Pass a callback in order to use old-school API style.
    • Or you can skip the callback and use returned promise.
• 2015-07-03 - 0.1.1 - Publishing package in the npm repository.
• 2015-07-02 - 0.1.0 - First version:
  • Authentication
  • Voucher informations: get, usage
  • Voucher operations: use