api/docs/api-provider/classes/_http_index_.httpprovider.md

The HTTP Provider allows sending requests using HTTP. it does not support subscriptions so you won´t be able to listen to events such as new blocks or balance changes. It is usually preferrable using the WsProvider. example: import createApi from '@polkadot/api'; import WsProvider from '@polkadot/api-provider/ws';

const provider = new WsProvider('http://127.0.0.1:9933')); const api = createApi(provider);

see: WsProvider

Hierarchy

HttpProvider

Implements

• ProviderInterface

Constructors

constructor

⊕ new HttpProvider(endpoint: string): HttpProvider

Defined in http/index.ts:35

Parameters:

Param	Type
endpoint	string

Returns: HttpProvider

---

Methods

isConnected

▸ isConnected(): boolean

Implementation of ProviderInterface.isConnected

Defined in http/index.ts:49

Whether the node is connected or not.

Returns: boolean true if connected

---

on

▸ on(type: ProviderInterface$Emitted, sub: ProviderInterface$EmitCb): void

Implementation of ProviderInterface.on

Defined in http/index.ts:56

Events are not supported with the HttpProvider, see WsProvider.

Parameters:

Param	Type
type	ProviderInterface$Emitted
sub	ProviderInterface$EmitCb

Returns: void

---

send

▸ send(method: string, params: Array<any>): Promise<any>

Implementation of ProviderInterface.send

Defined in http/index.ts:60

Parameters:

Param	Type
method	string
params	Array<any>

Returns: Promise<any>

---

subscribe

▸ subscribe(types: string, method: string, params: Array<any>, cb: ProviderInterface$Callback): Promise<number>

Implementation of ProviderInterface.subscribe

Defined in http/index.ts:82

Subscriptions are not supported with the HttpProvider, see WsProvider.

Parameters:

Param	Type
types	string
method	string
params	Array<any>
cb	ProviderInterface$Callback

Returns: Promise<number>

---

unsubscribe

▸ unsubscribe(type: string, method: string, id: number): Promise<boolean>

Implementation of ProviderInterface.unsubscribe

Defined in http/index.ts:91

Subscriptions are not supported with the HttpProvider, see WsProvider.

Parameters:

Param	Type
type	string
method	string
id	number

Returns: Promise<boolean>

---