mirror of https://github.com/vacp2p/rfc.git
Complete rework: naming conventions, examples, polling, etc
This commit is contained in:
Hanno Cornelius
Hanno Cornelius
parent
4109a6ff76
commit
3d3f63bcaf
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@ -5,25 +5,28 @@ status: Raw
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authors: Hanno Cornelius <hanno@status.im>
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---
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## Table of Contents
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# Table of Contents
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1. [Introduction](#introduction)
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2. [Wire Protocol](#wire-protocol)
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1. [Wire Protocol](#wire-protocol)
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1. [Transport](#transport)
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1. [Types](#types)
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1. [Method naming](#method-naming)
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1. [Debug API](#debug-api)
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1. [Relay API](#relay-api)
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1. [Store API](#store-api)
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1. [Filter API](#filter-api)
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3. [Copyright](#copyright)
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1. [Example usage](#example-usage)
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1. [Changelod](#changelog)
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1. [Copyright](#copyright)
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## Introduction
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# Introduction
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This specification describes the JSON-RPC API that Waku v2 nodes MAY adhere to. Refer to the [Waku v2 specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-v2.md) for more information on Waku v2.
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## Wire Protocol
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# Wire Protocol
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### Transport
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## Transport
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Nodes SHOULD expose an accessible [JSON-RPC](https://www.jsonrpc.org/specification) API. The JSON-RPC version SHOULD be `2.0`. Below is an example request:
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@ -36,7 +39,7 @@ Nodes SHOULD expose an accessible [JSON-RPC](https://www.jsonrpc.org/specificati
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}
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```
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#### Fields
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### Fields
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| Field | Description |
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| --------- | --------------------------------------------------- |
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@ -45,19 +48,40 @@ Nodes SHOULD expose an accessible [JSON-RPC](https://www.jsonrpc.org/specificati
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| `params` | An array of parameters for the request |
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| `id` | The request ID |
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### Types
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## Types
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In this specification, the primitive types `Boolean`, `String`, `Number` and `Null`, as well as the structured types `Array` and `Object`, are to be interpreted according to the [JSON-RPC specification](https://www.jsonrpc.org/specification#conventions). It also adopts the same capitalisation conventions.
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The following structured types are defined for use throughout the document:
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#### WakuMessage
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### WakuMessage
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Refer to [`Waku Message` specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-message.md) for more information.
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`WakuMessage` is an `Object` containing the following fields:
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `payload` | `String` | mandatory | The payload being sent |
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| `payload` | `String` | mandatory | The message payload |
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| `contentTopic` | `Number` | optional | Message content topic for optional content-based filtering |
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| `version` | `Number` | optional | Message version. Used to indicate type of payload encryption. Default version is 0 (no payload encryption). |
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## Method naming
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The JSON-RPC methods in this document are designed to be mappable to HTTP REST endpoints. Method names follow the pattern `<method_type>_waku_<protocol_version>_<api>_<api_version>_<resource>`
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- `<method_type>`: prefix of the HTTP method type that most closely matches the JSON-RPC function. Supported `method_type` values are `get`, `post`, `put`, `delete` or `patch`.
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- `<protocol_version>`: Waku version. Currently **v2**.
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- `<api>`: one of the listed APIs below, e.g. `store`, `debug`, or `relay`.
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- `<api_version>`: API definition version. Currently **v1** for all APIs.
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- `<resource>`: the resource or resource path being addressed
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The method `post_waku_v2_relay_v1_message`, for example, would map to the HTTP REST endpoint `POST /waku/v2/relay/v1/message`.
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## Debug API
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### Types
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The following structured types are defined for use on the Debug API:
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#### WakuInfo
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@ -66,25 +90,110 @@ The following structured types are defined for use throughout the document:
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| ----: | :--: | :--: |----------- |
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| `listenStr` | `String` | mandatory | Address that the node is listening for |
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#### HistoryQuery
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### `get_waku_v2_debug_v1_info`
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`HistoryQuery` is an `Object` containing the following fields:
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The `get_waku_v2_debug_v1_info` method retrieves information about a Waku v2 node
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#### Parameters
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none
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#### Response
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- [**`WakuInfo`**](#WakuInfo) - information about a Waku v2 node
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## Relay API
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Refer to the [Waku Relay specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-relay.md) for more information on the relaying of messages.
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### Types
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The following structured types are defined for use on the Relay API:
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#### WakuRelayMessage
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`WakuRelayMessage` is an `Object` containing the following fields:
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `topics` | `Array`[`Number`] | mandatory | Array of content topics to query for historical messages |
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| `pagingInfo` | [`PagingInfo`](#PagingInfo) | optional | Pagination information |
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| `payload` | `String` | mandatory | The payload being relayed |
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| `contentTopic` | `Number` | optional | Message content topic for optional content-based filtering |
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#### HistoryResponse
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### `post_waku_v2_relay_v1_message`
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`HistoryResponse` is an `Object` containing the following fields:
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The `post_waku_v2_relay_v1_message` method publishes a message to be relayed on a [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor)
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#### Parameters
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `topic` | `String` | mandatory | The [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor) being published on |
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| `message` | [`WakuRelayMessage`](#WakuRelayMessage) | mandatory | The `message` being relayed |
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#### Response
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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### `post_waku_v2_relay_v1_subscriptions`
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The `post_waku_v2_relay_v1_subscriptions` method subscribes a node to an array of [PubSub `topics`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor).
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#### Parameters
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `topics` | `Array`[`String`] | mandatory | The [PubSub `topics`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor) being subscribed to |
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#### Response
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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### `delete_waku_v2_relay_v1_subscriptions`
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The `delete_waku_v2_relay_v1_subscriptions` method unsubscribes a node from an array of [PubSub `topics`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor).
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#### Parameters
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `topics` | `Array`[`String`] | mandatory | The [PubSub `topics`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor) being unsubscribed from |
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#### Response
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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### `get_waku_v2_relay_v1_messages_head`
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The `get_waku_v2_relay_v1_messages_head` method returns the latest message on a subscribed [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor). The server MUST respond with an [error](https://www.jsonrpc.org/specification#error_object) if no subscription exists for the polled `topic`. If no message has yet been received on the polled `topic`, the server MUST block until a message is received or a timeout is reached. This method can be used to long poll a `topic` for new messages.
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#### Parameters
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `topic` | `String` | mandatory | The [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor) to poll for the latest message |
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#### Response
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- [**`WakuMessage`**](#WakuMessage) - the latest `message` on the polled `topic` or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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## Store API
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Refer to the [Waku Store specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-store.md) for more information on message history retrieval.
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### Types
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The following structured types are defined for use on the Store API:
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#### StoreResponse
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`StoreResponse` is an `Object` containing the following fields:
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `messages` | `Array`[[`WakuMessage`](#WakuMessage)] | mandatory | Array of retrieved historical messages |
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| `pagingInfo` | [`PagingInfo`](#PagingInfo) | [conditional](#store-api) | Paging information from which to resume further historical queries |
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| `pagingOptions` | [`PagingOptions`](#PagingOptions) | [conditional](#`get_waku_v2_store_v1_messages`) | Paging information from which to resume further historical queries |
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#### PagingInfo
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`PagingInfo` is an `Object` containing the following fields:
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#### PagingOptions
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`PagingOptions` is an `Object` containing the following fields:
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `pageSize` | `Number` | mandatory | Number of messages to retrieve per page |
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| `digest` | `String` | mandatory | A hash for the message at this [`Index`](#Index) |
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| `receivedTime` | `Number` | mandatory | UNIX timestamp at which the message at this [`Index`](#Index) was received |
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#### FilterRequest
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### `get_waku_v2_store_v1_messages`
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The `get_waku_v2_store_v1_messages` method retrieves historical messages on specific content topics. This method MAY be called with [`PagingOptions`](#PagingOptions), to retrieve historical messages on a per-page basis. If the request included [`PagingOptions`](#PagingOptions), the node MUST return messages on a per-page basis and include [`PagingOptions`](#PagingOptions) in the response. These [`PagingOptions`](#PagingOptions) MUST contain a `cursor` pointing to the [`Index`](#Index) from which a new page can be requested.
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#### Parameters
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`FilterRequest` is an `Object` containing the following fields:
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `contentFilters` | `Array`[[`ContentFilter`](#ContentFilter)] | mandatory | Array of content filters applying to the request |
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| `topic` | `String` | optional | Message topic |
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| `topics` | `Array`[`Number`] | mandatory | Array of content topics to query for historical messages |
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| `pagingOptions` | [`PagingOptions`](#PagingOptions) | optional | Pagination information |
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#### Response
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- [**`StoreResponse`**](#StoreResponse) - the response to a `query` for historical messages.
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## Filter API
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Refer to the [Waku Filter specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-filter.md) for more information on content filtering.
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### Types
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The following structured types are defined for use on the Filter API:
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#### ContentFilter
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| ----: | :--: | :--: |----------- |
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| `topics` | `Array`[`Number`] | mandatory | Array of message content topics |
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### Debug API
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### `post_waku_v2_filter_v1_subscription`
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#### `get_waku_v2_debug_info`
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The `post_waku_v2_filter_v1_subscription` method creates a subscription in a [light node](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-filter.md#rationale) for messages that matches a content filter and, optionally, a [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor).
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The `get_waku_v2_debug_info` method retrieves information about a Waku v2 node
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#### Parameters
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##### Parameters
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `contentFilters` | `Array`[[`ContentFilter`](#ContentFilter)] | mandatory | Array of content filters being subscribed to |
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| `topic` | `String` | optional | Message topic |
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none
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##### Response
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- [**`WakuInfo`**](#WakuInfo) - information about a Waku v2 node
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### Relay API
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Refer to the [Waku Relay specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-relay.md) for more information on the relaying of messages.
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#### `post_waku_v2_relay_publish`
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The `post_waku_v2_relay_publish` method publishes a message on a [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor)
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##### Parameters
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- **`String`** - the [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor) being published on
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- [**`WakuMessage`**](#WakuMessage) - the `message` to publish
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##### Response
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#### Response
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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### Store API
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### `delete_waku_v2_filter_v1_subscription`
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Refer to the [Waku Store specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-store.md) for more information on message history retrieval.
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The `delete_waku_v2_filter_v1_subscription` method removes subscriptions in a [light node](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-filter.md#rationale) matching a content filter and, optionally, a [PubSub `topic`](https://github.com/libp2p/specs/blob/master/pubsub/README.md#the-topic-descriptor).
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#### `get_waku_v2_store_query`
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#### Parameters
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The `get_waku_v2_store_query` method retrieves historical messages on specific content topics.
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| Field | Type | Inclusion | Description |
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| ----: | :--: | :--: |----------- |
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| `contentFilters` | `Array`[[`ContentFilter`](#ContentFilter)] | mandatory | Array of content filters being unsubscribed from |
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| `topic` | `String` | optional | Message topic |
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##### Parameters
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- [**`HistoryQuery`**](#HistoryQuery) - the history `query` to perform. This query MAY be called with [`PagingInfo`](#PagingInfo), to retrieve historical messages on a per-page basis.
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##### Response
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- [**`HistoryResponse`**](#HistoryResponse) - the response to a history `query`. If the `query` included [`PagingInfo`](#PagingInfo), the node MUST return messages on a per-page basis and include [`PagingInfo`](#PagingInfo) in the response. This [`PagingInfo`](#PagingInfo) MUST contain a `cursor` pointing to the [`Index`](#Index) from which a new page can be requested.
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### Filter API
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Refer to the [Waku Filter specification](https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-filter.md) for more information on content filtering.
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#### `post_waku_v2_filter_subscribe`
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The `post_waku_v2_filter_subscribe` method subscribes to receive notifications for any inbound [`WakuMessage`](#WakuMessage) that matches a content filter.
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##### Parameters
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- [**`FilterRequest`**](#FilterRequest) - filter criteria being subscribed to.
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##### Response
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#### Response
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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#### `post_waku_v2_filter_unsubscribe`
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# Example usage
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The `post_waku_v2_filter_unsubscribe` method unsubscribes from notifications for inbound [`WakuMessages`](#WakuMessage) matching a content filter.
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## Store API
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##### Parameters
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### `get_waku_v2_store_v1_messages`
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- [**`FilterRequest`**](#FilterRequest) - filter criteria being unsubscribed from.
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This method is part of the `store` API and the specific resources to retrieve are (historical) `messages`. The protocol (`waku`) is on `v2`, whereas the Store API definition is on `v1`.
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##### Response
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1. `get` *all* the historical messages for content topic **1**; no paging required
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- **`Bool`** - `true` on success or an [error](https://www.jsonrpc.org/specification#error_object) on failure.
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#### Request
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## Copyright
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```curl -d '{"jsonrpc":"2.0","id":"id","method":"get_waku_v2_store_v1_messages", "params":[[1]]}' --header "Content-Type: application/json" http://localhost:8545```
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```jsonrpc
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{
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"jsonrpc": "2.0",
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"id": "id",
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"method": "get_waku_v2_store_v1_messages",
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"params": [
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[
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1
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]
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]
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}
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```
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#### Response
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```jsonrpc
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{
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"jsonrpc": "2.0",
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"id": "id",
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"result": {
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"messages": [
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{
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"payload": [
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1
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],
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"contentTopic": 1,
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"version": 0
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},
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{
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"payload": [
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2
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],
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"contentTopic": 1,
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"version": 0
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},
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{
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"payload": [
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3
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],
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"contentTopic": 1,
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"version": 0
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}
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],
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"pagingInfo": null
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},
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"error": null
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}
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```
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---
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2. `get` a single page of historical messages for content topic **1**; 2 messages per page, backward direction. Since this is the initial query, no `cursor` is provided, so paging will be performed from the end of the list.
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#### Request
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||||
|
||||
```curl -d '{"jsonrpc":"2.0","id":"id","method":"get_waku_v2_store_v1_messages", "params":[[1],{"pageSize":2,"forward":false}]}' --header "Content-Type: application/json" http://localhost:8545```
|
||||
|
||||
```jsonrpc
|
||||
{
|
||||
"jsonrpc": "2.0",
|
||||
"id": "id",
|
||||
"method": "get_waku_v2_store_v1_messages",
|
||||
"params": [
|
||||
[
|
||||
1
|
||||
],
|
||||
{
|
||||
"pageSize": 2,
|
||||
"forward": false
|
||||
}
|
||||
]
|
||||
}
|
||||
```
|
||||
|
||||
#### Response
|
||||
|
||||
```jsonrpc
|
||||
{
|
||||
"jsonrpc": "2.0",
|
||||
"id": "id",
|
||||
"result": {
|
||||
"messages": [
|
||||
{
|
||||
"payload": [
|
||||
2
|
||||
],
|
||||
"contentTopic": 1,
|
||||
"version": 0
|
||||
},
|
||||
{
|
||||
"payload": [
|
||||
3
|
||||
],
|
||||
"contentTopic": 1,
|
||||
"version": 0
|
||||
}
|
||||
],
|
||||
"pagingInfo": {
|
||||
"pageSize": 2,
|
||||
"cursor": {
|
||||
"digest": "abcdef",
|
||||
"receivedTime": 1605887187
|
||||
},
|
||||
"forward": false
|
||||
}
|
||||
},
|
||||
"error": null
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
3. `get` the next page of historical messages for content topic **1**, using the cursor received above; 2 messages per page, backward direction.
|
||||
|
||||
#### Request
|
||||
|
||||
```curl -d '{"jsonrpc":"2.0","id":"id","method":"get_waku_v2_store_v1_messages", "params":[[1],{"pageSize":2,"cursor":{"digest":"abcdef","receivedTime":1605887187.00},"forward":false}]}' --header "Content-Type: application/json" http://localhost:8545```
|
||||
|
||||
```jsonrpc
|
||||
{
|
||||
"jsonrpc": "2.0",
|
||||
"id": "id",
|
||||
"method": "get_waku_v2_store_v1_messages",
|
||||
"params": [
|
||||
[
|
||||
1
|
||||
],
|
||||
{
|
||||
"pageSize": 2,
|
||||
"cursor": {
|
||||
"digest": "abcdef",
|
||||
"receivedTime": 1605887187
|
||||
},
|
||||
"forward": false
|
||||
}
|
||||
]
|
||||
}
|
||||
```
|
||||
|
||||
#### Response
|
||||
|
||||
```jsonrpc
|
||||
{
|
||||
"jsonrpc": "2.0",
|
||||
"id": "id",
|
||||
"result": {
|
||||
"messages": [
|
||||
{
|
||||
"payload": [
|
||||
1
|
||||
],
|
||||
"contentTopic": 1,
|
||||
"version": 0
|
||||
}
|
||||
],
|
||||
"pagingInfo": {
|
||||
"pageSize": 2,
|
||||
"cursor": {
|
||||
"digest": "123abc",
|
||||
"receivedTime": 1605866187
|
||||
},
|
||||
"forward": false
|
||||
}
|
||||
},
|
||||
"error": null
|
||||
}
|
||||
```
|
||||
|
||||
# Changelog
|
||||
|
||||
TBD
|
||||
|
||||
# Copyright
|
||||
|
||||
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
|
||||
|
|
|
|||
Loading…
Reference in New Issue