Chainstack is the leading suite of services connecting developers with Web3 infrastructure

         

• Homepage • Supported protocols • Chainstack blog • Chainstack docs • Blockchain API reference • Start for free •

Smart contract watcher chainstack

This simple project uses the Ethers.js library to examine blocks using the eth_getBlockReceipts method and extract data about newly deployed smart contracts.

Read the full article on the Chainstack Developer Portal:

• Uncovering the Power of eth_getBlockReceipts

Project details

This program uses the ethers.js library to retrieve all of the transaction receipts in a block at once using the eth_getBlockReceipts method; it then looks for transactions that deployed a new smart contract by inspecting the contractAddress field of each transaction receipt.

This project is compatible with EVM-based chains and queryng a node running the Erigon client.

Quickstart

Clone this project

git clone https://github.com/soos3d/smart-contract-watcher-chainstack.git

Install Dependencies

From the root directory of the project run:

npm ci

Use npm ci to launch a clean install of the dependencies, this will install the same version as in the package.json file.

Edit .env.sample

Edit the .env.sample file, paste the node endpoint that you wish to test, and rename it to .env.

Note that an RPC running Erigon is required.

ERIGON_RPC="YOUR_ERIGON_NODE_URL"

Start

To start the program run the following:

npm run start

This will run the app giving you the following results in the console if new smart contracts are detected.

> smart-contract-watcher-chainstack@1.0.0 start
> node index.js

New smart contract detected! 
New smart contract address: 0x00e9a503b88732ee3e28a0fec3343c405f5e963d
Deployed by address: 0x984380fc12cc3bdb894e1f35111dd992fb52a231
Deployed by transaction: 0xad8d3a6647a4ad7e2f8eedef258b4c3233d54e5999a855ca59500f5df70d35de

Prerequisites

The system requires at least:

• Node.js v16.17.0— install Node
• An Erigon RPC endpoint with Chainstack

Dependecies

• dotenv: ^16.0.3
• ethers: ^5.7.2

Deploy an Erigon node with Chainstack

To use this app, you need access to a node running the Erigon client.

Chainstack supports the Erigon client on Ethereum, Polygon, and BNB smart chain archive nodes. This option is available on the Business subscription plan and higher on elastic nodes or starting from the Growth subscription plan for dedicated nodes.

Follow the steps to deploy an archive node running Erigon on elastic nodes:

1. Sign up with Chainstack
2. Create a project

After you created a project:

1. Select the project with the network.
2. Select the network.
3. Click Add node.
4. Provide a node name.
5. Under Type, select Elastic.
6. Under Mode, select Archive. With an archive node, you can query historical states for the entire chain.
7. Under Debug and trace APIs, select On.
8. Under Hosting, select Chainstack.
9. For Chainstack hosting, select a cloud provider and a region.
10. Review your changes and click Add node.

Install

To install this project:

Clone this repository:

git clone https://github.com/soos3d/smart-contract-watcher-chainstack.git

Install dependencies:

From the root directory of the project run:

npm ci

Use npm ci to launch a clean install of the dependencies, this will install the same version as in the package.json file.