Open DeFi Notification Protocol

An open always-free notification protocol for DeFi on-chain events.

Goals

1. Always free for users - no subscription fees or ads

   We believe that mobile alerts for DeFi positions should be a free core blockchain service accessible to anyone, much like MetaMask or Etherscan.

2. Never miss anything - mobile app with persistent alarms and even phone calls

   When money is involved and you're about to be liquidated, you can't afford to miss a notification. We will wake you up if needed in the middle of the night.

3. Multi network support - Ethereum, BSC, Polygon and more

   The DeFi ecosystem is constantly expanding to new networks like Polygon and Arbitrum. The protocol is chain agnostic and designed to integrate with any ecosystem.

4. Community-led open protocol with public and decentralized alert nodes

   Core blockchain services should be as decentralized as possible. Allow any developer to contribute code, any project to integrate and any validator to help run nodes.

How to integrate a new project

Integrating notifications for a new project requires implementing a small web3-compatible JavaScript class and creating a new PR to add the class to this repo.

Example - low health notification for Aave

This notification aims to protect Aave users from liquidation by notifying them when their position health factor drops below 1.1:

const BigNumber = require("bignumber.js");

class LowHealth {

  static displayName = "Low Health";
  static description = "Get notified when health factor is getting low (below 1.1)";

  async onInit(args) {
    const abi = [{/* ... */}];
    this.contract = new args.web3.eth.Contract(abi, "0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9");
  }

  async onBlocks(args) {
    const position = await this.contract.methods.getPositionData(args.address).call();
    if (new BigNumber(position.healthFactor).dividedBy("1e18").toNumber() < 1.1) return {
      notification: "Health factor dropped below 1.1"
    };
  }

}

module.exports = LowHealth;

Documentation and more examples

Formal TypeScript type definitions for the class interface are available here. Explore example integrations to different projects by browsing the different directories in this repo.

Testing your integration

Before submitting the PR, you should test your integration manually. Let's assume that you're integrating a new lending project called "SuperLend". You've git cloned this repo locally, created your new integration in the new directory superlend and created the following new files:

/superlend/project.json

/superlend/near-liquidation.js

To test your integration for the near liquidation notification do the following:

1. Make sure you're in the repo root

2. Run npm install

3. Create /_test/dev-keys.json (see example in that directory) containing your API key for a web3 service like Infura or Alchemy

4. Create /_test/test-superlend.js for your test, you can copy one of the other example test files

5. Run node ./_test/test-superlend.js

Execution environment

These JavaScript classes are constantly executed by protocol alert nodes in order to analyze new blocks of on-chain data for notifying protocol subscribers. Alert nodes are currently supported on the Orbs Network and executed by the public validators of the network.