# Interface: CompactDecryptGetKey()\<KeyType\>

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Interface for Compact JWE Decryption dynamic key resolution. No token components have been
verified at the time of this function call.

## Type Parameters

| Type Parameter | Default type | Description |
| ------ | ------ | ------ |
| `KeyType` *extends* [`CryptoKey`](../../../../types/type-aliases/CryptoKey.md) \| [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) | [`CryptoKey`](../../../../types/type-aliases/CryptoKey.md) \| [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) | Type definition of the keys the function resolves. Narrowing it is what lets [ResolvedKey.key](../../../../types/interfaces/ResolvedKey.md#key) be inferred at the call site. |

▸ **CompactDecryptGetKey**(`protectedHeader`, `token`): [`JWK`](../../../../types/type-aliases/JWK.md) \| [`KeyObject`](../../../../types/interfaces/KeyObject.md) \| `KeyType` \| [`Promise`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)\<[`JWK`](../../../../types/type-aliases/JWK.md) \| [`KeyObject`](../../../../types/interfaces/KeyObject.md) \| `KeyType`\>

Dynamic key resolution function. No token components have been verified at the time of this
function call. If a suitable key for the token cannot be matched, throw an error instead.

## Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `protectedHeader` | [`CompactJWEHeaderParameters`](../../../../types/interfaces/CompactJWEHeaderParameters.md) | JWE or JWS Protected Header. |
| `token` | [`FlattenedJWE`](../../../../types/interfaces/FlattenedJWE.md) | The consumed JWE or JWS token. |

## Returns

[`JWK`](../../../../types/type-aliases/JWK.md) \| [`KeyObject`](../../../../types/interfaces/KeyObject.md) \| `KeyType` \| [`Promise`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)\<[`JWK`](../../../../types/type-aliases/JWK.md) \| [`KeyObject`](../../../../types/interfaces/KeyObject.md) \| `KeyType`\>