Block Delivery Network

block-dn is a simple web server that connects to your existing Bitcoin full node to serve data from the time chain to fetch over HTTP(S).
The goal is to serve the following data to Light Clients (e.g. mobile wallets):

• Block headers
• Blocks
• Compact Filter headers
• Compact Filters
• Raw Transactions
• Block Transaction Inclusion Proofs (TxOutProofs)
• Silent Payments Block Tweak Data

There are two ways to use block-dn:

Connect to your own node

Install and run block-dn on your own device and configure that HTTP endpoint in your compatible wallet. Your own node's chain information is then used to sync the wallet state.

Use the Cloud Flare CDN cached instance

If you have a way to find out the current most recent block hash from your peers or your own node, the rest of the chain data (e.g. block headers, blocks, compact filters) can be downloaded from an untrusted source. Such an untrusted source can be found at block-dn.org. Both these sites run an instance of block-dn and are behind Cloud Flare's caching proxy service, effectively caching the data in geographically distributed sites around the world for maximum access speed and very low latency.

    {
      "start_height": <start_block>,
      "num_blocks": 2000,
      "blocks": [
        {
          "<tx_index 1>": "02a1633f5b1c4e8...",
          "<tx_index x>": "03cdefa84923dc8..."
        },
        {
          ...
        }
      ]
    }