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How to get transaction signatures from block to block

Prerequisites​

Before getting started, make sure you have the following ready:

  • Node v.14+
  • NPM

Step 1: Setup Blocklens​

First register your Blocklens account and get your Blocklens API Key.

Once you have your Blocklens API Key, install the Blocklens SDK in your project.

npm i blocklens-sdk

Step 2: Get transaction signatures from block to block​

In order to get transaction signatures from block to block, Blocklens provides you a getTransactionSignaturesFromBlockToBlock endpoint to do so.

Here you'll need parameters: from_block, to_block.

Once you've obtained all the from_block, to_block, you can copy the following code:

import Blocklens from "blocklens-sdk";

const blocklens = new Blocklens();
blocklens.init({ apiKey: "YOUR_API_KEY" });

const runApis = async () => {
  const response = await blocklens.APTOS_MAINNET.getTransactionSignaturesFromBlockToBlock({"from_block":18246150,"to_block":18246151});
  console.log(response);
};

runApis();

Step 3: Run the script​

ts-node index.ts

In your terminal, you should see the following JSON response with the data: In your terminal, you should see the following JSON response with the data blocks:

[
  {
    "cursor": "string",
    "page": 0,
    "limit": 0,
    "total_items": 0,
    "data": [
      {
        "block_height": 1,
        "transaction_version": 1,
        "transaction_hash": "0xbf3d139d0bbe68f1db6d393b135c2ed12ab5ec1635f08b26994180d1e6434dd1",
        "transaction_type": "block_metadata_transaction",
        "type": "ed25519_signature",
        "public_key": "key",
        "signature": "0x5f93f5019c612b6cb59d1649b7f363f108ab37b3ebfdc76ed59c841b1451e3f1b22d502f2c4e597b1bbd39396ab9e42e0dc68463971465c3c45bf880c08f5007",
        "timestamp": 1
      }
    ]
  }
]

Congratulations 🥳 you just found the get transaction signatures from block to block on multiple chains with only a few lines of code using the Blocklens Wallet API!

API Reference​

If you want to know more details on the endpoint and optional parameters, check out:

Support​

If you face any trouble following the tutorial, feel free to reach out to our community engineers in our Discord or Forum to get 24/7 developer support.