# Streaming Payment

The first request of a series is very similar to [payment-network-erc20-fee-proxy](https://github.com/RequestNetwork/requestNetwork/blob/7be84246d3012959739a99db6463062374f6cd91/packages/advanced-logic/specs/payment-network-erc20-fee-proxy-contract-0.1.0.md), it defines the `salt`, `paymentAddress` and `requestId` to compute the `paymentReference` used for the whole series.

Other requests must define a `previousRequestId` and cannot redefine any of the payment properties (`paymentAddress`, `feeAddress` or `salt`).

Multiple requests can be paid with the same stream, typically recurring requests of fixed amounts paid continuously. A group of requests payable with the same stream are called a request series, they must all have the same currency.

For additional details, see the [payment-network-erc777-stream-0.1.0 specification](https://github.com/RequestNetwork/requestNetwork/blob/7be84246d3012959739a99db6463062374f6cd91/packages/advanced-logic/specs/payment-network-erc777-stream-0.1.0.md)

## Create a Streaming Request

To create a streaming request, [Quickstart - Node.js](/advanced/request-network-sdk/get-started/quickstart-node.js.md#create-a-request) like normal, but set the `paymentNetwork` parameter to the `ERC777_STREAM` payment network.

### Create the first request in a series

```typescript
  // The paymentNetwork is the method of payment and related details.
  paymentNetwork: {
    id: Types.Extension.PAYMENT_NETWORK_ID.ERC777_STREAM,
    parameters: {
      expectedFlowRate: expectedFlowRate // number, Expected amount of request currency per second
      expectedStartDate: expectedStartDate // timestamp, Expected start of stream	
      paymentAddress: payeeIdentity,
    },
  },
```

### Create subsequent requests in a series

```
  // The paymentNetwork is the method of payment and related details.
  paymentNetwork: {
    id: Types.Extension.PAYMENT_NETWORK_ID.ERC777_STREAM,
    parameters: {
      originalRequestId: 'abcd', // first reqeust in the series
      previousRequestId: 'abcd', // previous request in the series
      recurrenceNumber: 1, // 1 if previous request is original, 2+ otherwise
    },
  },
```

## Tests

See Github for tests showing usage.

* <https://github.com/RequestNetwork/requestNetwork/blob/master/packages/advanced-logic/test/extensions/payment-network/erc777/stream.test.ts>
* <https://github.com/RequestNetwork/requestNetwork/tree/master/packages/payment-detection/test/erc777>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://legacy.docs.request.network/advanced/request-network-sdk/sdk-guides/payment/streaming-request.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.