Add function to get raw transaction data (the core image, video, file, etc)

[ropats16]

Description

Create a getData function that returns the core data associated with a transaction id for mainnet, bundled and arlocal transactions.

Steps for usage

Here's how the function will be used:

import { getData } from 'arweavekit/transaction'

const data = await getData({
   transactionId: string,
   environment: string,
});

Compatible Environments

• NodeJS
• Browser

Additional Context

• The arweave-js implementation can be used for some reference, however, this does not support bundled transaction ids (the ArweaveKit' getData function should fetch the core data for bundled transaction ids as well).
• Make sure to update types and tests accordingly.
• The getTransaction function will be deprecated after this implementation as it returns the transaction metadata associated with a transaction id (docs for function) however this can be fetched with our GraphQL utilities as well.

[HAPPYS1NGH]

I would like to take it up

[ropats16]

Assigned it to you @HAPPYS1NGH!

cc: @7i7o @t8

[HAPPYS1NGH]

The data fetched could be JSON or an image, pdf, or basically anything. What should be the focus?
Only JSON specific or not? @ropats16
Maybe we can read for headers for all data types and return accordingly

[ropats16]

Hey @HAPPYS1NGH it should be able to get the data irrespective of the data type. The basic arweave-js implementation either returns a base64URL encoded string, a decoded Uint8Array or a decoded string.

While it would be nice to be able to have support for the various data types, as any type of data can be stored on Arweave, the function could become too bulky and not be scalable.

[ropats16]

Hey @HAPPYS1NGH an update on this. The arweave-js implementation linked earlier is a legacy leftover from the old code. The data will have to be fetched with a fetch request itself and you can refer here for sample implementation. It takes in a response type and checks the header "Content-Type" to return the appropriate format.

[HAPPYS1NGH]

Submitted the PR #90
@ropats16