# @integraledger/lcp/a2a

> The exports of @integraledger/lcp/a2a.

Source: https://lcp.integraledger.com/reference/api/a2a

## Interfaces

### A2aAgentExtension

#### Properties

| Property       | Type      |
| -------------- | --------- |
|  `description` | `string`  |
|  `required`    | `boolean` |
|  `uri`         | `string`  |

***

### A2aTask

#### Indexable

> \[`k`: `string`]: [`Json`](https://lcp.integraledger.com/reference/api#json) | `undefined`

#### Properties

| Property     | Type     |
| ------------ | -------- |
|  `metadata?` | `object` |

## Variables

### A2A\_EXTENSION\_URIS

> `const` **A2A\_EXTENSION\_URIS**: readonly `string`\[]

The extension's URIs, in order of preference. The first is the one written when the client activated none.

***

### binding

> `const` **binding**: [`Refusal`](https://lcp.integraledger.com/reference/api#refusal)

A2A binds nothing: the refusal given wherever an A2A pairing is asked for.

***

### delivery

> `const` **delivery**: `object`

What the carrier proves.

#### Type Declaration

| Name      | Type     |
| --------- | -------- |
|  `proves` | `string` |

## Functions

### agentExtension()

> **agentExtension**(`o?`): [`A2aAgentExtension`](#a2aagentextension)\[]

One Agent Card `capabilities.extensions[]` entry per listed URI. `required` defaults to false.

#### Parameters

| Parameter     | Type                         |
| ------------- | ---------------------------- |
| `o?`          | \{ `required?`: `boolean`; } |
| `o.required?` | `boolean`                    |

#### Returns

[`A2aAgentExtension`](#a2aagentextension)\[]

***

### place()

> **place**(`task`, `h`, `link`, `a2aExtensions?`): [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | [`A2aTask`](#a2atask)

A copy of the task whose `metadata` carries `{type, value, legalContextUrl}` under the listed URI the request's
`A2A-Extensions` value activated, or the first listed URI. Other metadata is kept.

#### Parameters

| Parameter        | Type                  |
| ---------------- | --------------------- |
| `task`           | [`A2aTask`](#a2atask) |
| `h`              | `` `0x${string}` ``   |
| `link`           | `string`              |
| `a2aExtensions?` | `string`              |

#### Returns

[`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | [`A2aTask`](#a2atask)

***

### read()

> **read**(`task`): [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `h`: `` `0x${string}` ``; `link`: `string`; }

The hash and the link from the task's `metadata`, under a listed URI. No other key is read. Values under two listed
URIs must agree.

#### Parameters

| Parameter | Type                  |
| --------- | --------------------- |
| `task`    | [`A2aTask`](#a2atask) |

#### Returns

[`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `h`: `` `0x${string}` ``; `link`: `string`; }

***

### requested()

> **requested**(`a2aExtensions`): `boolean`

True when the request's `A2A-Extensions` value names a listed URI exactly: the value split on commas, each element
trimmed of SP and HTAB, compared case-sensitively.

#### Parameters

| Parameter       | Type                    |
| --------------- | ----------------------- |
| `a2aExtensions` | `string` \| `undefined` |

#### Returns

`boolean`