Venster Examples

This repo contains example implementations of the DAT Metadata Standard. They are all minted on the mainnet and preprod networks under policy ID 3333acb55ed79731ea6658abb74f453cbb87e15aee01a7aab484b2a6.

Block data JSON endpoint

Browser-based DATs have an endpoint available to query data from the latest block at runtime. This is done using the postMessage API. Here's an example:

// Request the data from venster periodically (every 10 seconds)
setInterval(() => window.parent.postMessage('@current_block', '*'), 10000)

// Receive the data from venster
window.addEventListener('message', (event) => {
  // Handle the requested data
  console.log(event.data.current_block)
})

For now, there's only the @current_block endpoint, but more endpoints will be available in the future.

Note: since Cardano produces a block every 20 seconds, there's no need to use a higher frequency than 10 seconds. If too many requests are sent to the endpoint, your token may be rate limited or even blocked.