Batch Sign DataItem

Wander Injected API batchSignDataItem() function

The batchSignDataItem() function allows you to create and sign an array of data item objects, compatible with arbundles. These data items can then be submitted to an ANS-104 compatible bundler.

Argument	Type	Description
dataItems	DataItem[]	An array of data items to sign
options?	SignatureOptions	Arweave transaction signature options

Note: This function requires the SIGN_TRANSACTION permission.

Note: The options argument is optional, if it is not provided, the extension will use the default signature options (default salt length) to sign the transaction.

Warning: This function is designed to sign multiple small data items. There is a limit of 200kb total for the function. Please ensure that the combined size of all data items does not exceed this limit.

Warning: The function returns an array of buffers of the signed data items. You'll need to manually load them into an arbundles DataItem instance as seen in the example usage.

Data item

This function requires valid data item objects, like so:

export interface DataItem[] {
  data: string | Uint8Array;
  target?: string;
  anchor?: string;
  tags?: {
    name: string;
    value: string;
  }[];
}

Example usage

import { DataItem } from "@dha-team/arbundles";

// connect to the extension
await window.arweaveWallet.connect(["SIGN_TRANSACTION"]);

// sign the data item
const signed = await window.arweaveWallet.batchSignDataItem([
  {
    data: "This is an example transaction 1",
    tags: [
      {
        name: "Content-Type",
        value: "text/plain",
      },
    ],
  },
  {
    data: "This is an example transaction 2",
    tags: [
      {
        name: "Content-Type",
        value: "text/plain",
      },
    ],
  },
]);

// load the result into a DataItem instance
const dataItems = signed.map((buffer) => new DataItem(buffer));

// now you can submit them to a bundler
for (const dataItem of dataItems) {
  await fetch(`https://upload.ardrive.io/v1/tx`, {
    method: "POST",
    headers: {
      "Content-Type": "application/octet-stream",
    },
    body: dataItem.getRaw(),
  });
}