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medusa-store/docs/content/references/services/classes/IdempotencyKeyService.md
2022-06-01 18:33:08 +02:00

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# Class: IdempotencyKeyService
## Hierarchy
- `"medusa-interfaces"`
**`IdempotencyKeyService`**
## Constructors
### constructor
**new IdempotencyKeyService**(`__namedParameters`)
#### Parameters
| Name | Type |
| :------ | :------ |
| `__namedParameters` | `Object` |
#### Overrides
BaseService.constructor
#### Defined in
[services/idempotency-key.js:8](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L8)
## Methods
### create
**create**(`payload`): `Promise`<`IdempotencyKeyModel`\>
Creates an idempotency key for a request.
If no idempotency key is provided in request, we will create a unique
identifier.
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `payload` | `any` | payload of request to create idempotency key for |
#### Returns
`Promise`<`IdempotencyKeyModel`\>
the created idempotency key
#### Defined in
[services/idempotency-key.js:55](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L55)
___
### initializeRequest
**initializeRequest**(`headerKey`, `reqMethod`, `reqParams`, `reqPath`): `Promise`<`IdempotencyKeyModel`\>
Execute the initial steps in a idempotent request.
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `headerKey` | `string` | potential idempotency key from header |
| `reqMethod` | `string` | method of request |
| `reqParams` | `string` | params of request |
| `reqPath` | `string` | path of request |
#### Returns
`Promise`<`IdempotencyKeyModel`\>
the existing or created idempotency key
#### Defined in
[services/idempotency-key.js:29](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L29)
___
### lock
**lock**(`idempotencyKey`): `Promise`<`any`\>
Locks an idempotency.
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `idempotencyKey` | `string` | key to lock |
#### Returns
`Promise`<`any`\>
result of the update operation
#### Defined in
[services/idempotency-key.js:94](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L94)
___
### retrieve
**retrieve**(`idempotencyKey`): `Promise`<`IdempotencyKeyModel`\>
Retrieves an idempotency key
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `idempotencyKey` | `string` | key to retrieve |
#### Returns
`Promise`<`IdempotencyKeyModel`\>
idempotency key
#### Defined in
[services/idempotency-key.js:76](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L76)
___
### update
**update**(`idempotencyKey`, `update`): `Promise`<`any`\>
Locks an idempotency.
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `idempotencyKey` | `string` | key to update |
| `update` | `any` | update object |
#### Returns
`Promise`<`any`\>
result of the update operation
#### Defined in
[services/idempotency-key.js:121](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L121)
___
### workStage
**workStage**(`idempotencyKey`, `func`): `IdempotencyKeyModel`
Performs an atomic work stage.
An atomic work stage contains some related functionality, that needs to be
transactionally executed in isolation. An idempotent request will
always consist of 2 or more of these phases. The required phases are
"started" and "finished".
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `idempotencyKey` | `string` | current idempotency key |
| `func` | `Function` | functionality to execute within the phase |
#### Returns
`IdempotencyKeyModel`
new updated idempotency key
#### Defined in
[services/idempotency-key.js:148](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/idempotency-key.js#L148)