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How to get transaction changes from time to time

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 changes from time to time​

In order to get transaction changes from time to time, Blocklens provides you a getTransactionChangesFromTimeToTime endpoint to do so.

Here you'll need parameters: from_time, to_time.

Once you've obtained all the from_time, to_time, 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.getTransactionChangesFromTimeToTime({"from_time":"1696048259","to_time":"1696048260"});
  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": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6Mjc5OTgyMjcwMDAwMDAzLCJwYWdlIjoxLCJmcm9tX3RpbWUiOiIxNjk2MDQ4MjU5IiwidG9fdGltZSI6IjE2OTYwNDgyNTkiLCJpYXQiOjE2OTcwNjA0ODR9.BFKhFZsqz4mg18L0fa9UeATUBLPAorDCkpEX_vGuSmM",
  "page": 1,
  "limit": 20,
  "total_items": 1,
  "data": [
    {
      "block_height": 97922847,
      "timestamp": 1696048259,
      "transaction_version": 279982271,
      "transaction_type": "user_transaction",
      "transaction_hash": "0xee852ea50aaaa3a05faa59544cf132ce9537cb107e7212748eb3a8bd003ac60b",
      "type": "write_table_item",
      "address": "null",
      "state_key_hash": "0xc322dfcd449816cf5b7e212d7f359b5dc13ef190658a0e57b2081574fa4a2b7f",
      "block_hash": "0x5cbc98d7ca9a0493bf14606b1adfc4f2e60b995dddafb372b93ba1b330dfa73f",
      "change_index": "11",
      "data": "null",
      "data_type": "null",
      "handle": "0xd1321c17eebcaceee2d54d5f6ea0f78dae846689935ef53d1f0c3cff9e2d6c49",
      "key": "0x20ff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace",
      "resource": "null",
      "success": true,
      "value": "0x83a417650000000083a417650000000020ff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace00f164c9e526000000e9b53c040000000001080000000000000080a417650000000000f05fbfe2260000005122c3030000000001080000000000000080a4176500000000",
      "vm_status": "Executed successfully"
    }
  ]
}

Congratulations 🥳 you just found the get transaction changes from time to time 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.