Skip to content

Latest commit

 

History

History
47 lines (36 loc) · 3.42 KB

using-smart-contract.md

File metadata and controls

47 lines (36 loc) · 3.42 KB

Using Smart Contract

Push contracts are designed to act as a communication middleware for your smart contracts which ensures that even smart contracts can communicate with the wallet addresses (ie: web3 users).

How to send notification from smart contract?

Ensure that you know the contract address of Push Communication smart contract based on the blockchain and network from which you are sending the communication out.

For example: Staging Ethereum contract address is 0x87da9Af1899ad477C67FeA31ce89c1d2435c77DC while Staging Polygon contract address is 0xb3971BCef2D791bc4027BbfedFb47319A4AAaaAa. List of all smart contract and their environment is available here 👉 push-smart-contracts

Start by importing the Push Comm Contract Interface 👇

// PUSH Comm Contract Interface
interface IPUSHCommInterface {
    function sendNotification(address _channel, address _recipient, bytes calldata _identity) external;
}

Ensure your channel is up and running by following this guide create-your-notif-channel. Note down your channel address which you need to put in the code below as YOUR_CHANNEL_ADDRESS.

Next call the function sendNotification(address _channel, address _recipient, bytes calldata _identity) and pass the address of the channel, recipient and the identity based on your needs.

IPUSHCommInterface(EPNS_COMM_CONTRACT_ADDRESS_FOR_SPECIFIC_BLOCKCHAIN).sendNotification(
    YOUR_CHANNEL_ADDRESS, // from channel - recommended to set channel via dApp and put it's value -> then once contract is deployed, go back and add the contract address as delegate for your channel
    to, // to recipient, put address(this) in case you want Broadcast or Subset. For Targetted put the address to which you want to send
    bytes(
        string(
            // We are passing identity here: https://docs.epns.io/developers/developer-guides/sending-notifications/advanced/notification-payload-types/identity/payload-identity-implementations
            abi.encodePacked(
                "0", // this is notification identity: https://docs.epns.io/developers/developer-guides/sending-notifications/advanced/notification-payload-types/identity/payload-identity-implementations
                "+", // segregator
                "3", // this is payload type: https://docs.epns.io/developers/developer-guides/sending-notifications/advanced/notification-payload-types/payload (1, 3 or 4) = (Broadcast, targetted or subset)
                "+", // segregator
                "Title", // this is notificaiton title
                "+", // segregator
                "Body" // notification body
            )
        )
    )
);

The last step is to go back to your channel and add the smart contract address as a delegate ensuring notifications sent by your smart contract are routed through your channel and presented to your users. Learn about adding-delegates-for-channel.md.

{% hint style="info" %} Example of Token Transfer Notification can be found here 👉 token-transfer-notification-via-smart-contract-example.md {% endhint %}