market/plugins/gatsby-source-ocean/gatsby-node.js

const axios = require('axios')

exports.sourceNodes = async ({
  actions,
  createNodeId,
  createContentDigest
}) => {
  const { createNode } = actions

  // Query for all assets to use in creating pages.
  const result = await axios(
    `https://aquarius.marketplace.oceanprotocol.com/api/v1/aquarius/assets`
  )

  for (let i = 0; i < result.data.ids.length; i++) {
    const did = result.data.ids[i]

    const metadataResult = await axios(
      `https://aquarius.marketplace.oceanprotocol.com/api/v1/aquarius/assets/metadata/${did}`
    )

    const metadata = {
      did,
      ...metadataResult.data.attributes
    }

    const nodeMeta = {
      id: createNodeId(did),
      parent: null,
      children: [],
      internal: {
        type: 'Asset',
        mediaType: 'application/json',
        content: JSON.stringify(metadata),
        contentDigest: createContentDigest(metadata)
      }
    }

    const node = {
      ...metadata,
      ...nodeMeta
    }

    await createNode(node)
  }
}