VeBetter: Build X2Earn Apps

Integration (JavaScript)

Use the VeBetter JavaScript SDK to securely send B3TR rewards with verifiable proofs and metadata from your backend or smart contract.

Prerequisites

JavaScript Version: Distribute B3TR

JavaScript (Backend) is ideal for mobile or web apps with centralized components. It allows you to verify proofs server-side, such as checking timestamps, validating GPS locations, or scoring input data, before triggering onchain distribution.

import {
  ProviderInternalHDWallet,
  ThorClient,
  VeChainProvider
} from "@vechain/sdk-network";
import { X2EarnRewardsPool } from "@vechain/vebetterdao-contracts";
import dotenv from 'dotenv';
dotenv.config();
const thor = ThorClient.at('https://testnet.vechain.org');
const provider = new VeChainProvider(
  thor,
  new ProviderInternalHDWallet(process.env.MNEMONIC?.split(" "))
);
const signer = await provider.getSigner();
const x2EarnRewardsPoolContract = thor.contracts.load(
  X2EarnRewardsPool.address.testnet,
  X2EarnRewardsPool.abi,
  signer
);
const tx = await x2EarnRewardsPoolContract.transact.distributeRewardWithProof(
  process.env.VEBETTERDAO_APP_ID,
  rewardAmount, // set the reward amount
  account, // user's wallet address
  proofTypes, // e.g. ['image', 'link']
  proofValues, // e.g. ['https://...', 'https://...']
  impactCodes, // e.g. ['waste_mass']
  impactValues, // e.g. [100]
  description  // e.g. "User recycled 1kg of plastic"
);
await tx.wait();

import {
  ProviderInternalHDWallet,
  ThorClient,
  VeChainProvider
} from "@vechain/sdk-network";
import { X2EarnRewardsPool } from "@vechain/vebetterdao-contracts";
import dotenv from 'dotenv';
dotenv.config();
const thor = ThorClient.at('https://testnet.vechain.org');
const provider = new VeChainProvider(
  thor,
  new ProviderInternalHDWallet(process.env.MNEMONIC?.split(" "))
);
const signer = await provider.getSigner();
const x2EarnRewardsPoolContract = thor.contracts.load(
  X2EarnRewardsPool.address.testnet,
  X2EarnRewardsPool.abi,
  signer
);
const tx = await x2EarnRewardsPoolContract.transact.distributeRewardWithProof(
  process.env.VEBETTERDAO_APP_ID,
  rewardAmount, // set the reward amount
  account, // user's wallet address
  proofTypes, // e.g. ['image', 'link']
  proofValues, // e.g. ['https://...', 'https://...']
  impactCodes, // e.g. ['waste_mass']
  impactValues, // e.g. [100]
  description  // e.g. "User recycled 1kg of plastic"
);
await tx.wait();

import {
  ProviderInternalHDWallet,
  ThorClient,
  VeChainProvider
} from "@vechain/sdk-network";
import { X2EarnRewardsPool } from "@vechain/vebetterdao-contracts";
import dotenv from 'dotenv';
dotenv.config();
const thor = ThorClient.at('https://testnet.vechain.org');
const provider = new VeChainProvider(
  thor,
  new ProviderInternalHDWallet(process.env.MNEMONIC?.split(" "))
);
const signer = await provider.getSigner();
const x2EarnRewardsPoolContract = thor.contracts.load(
  X2EarnRewardsPool.address.testnet,
  X2EarnRewardsPool.abi,
  signer
);
const tx = await x2EarnRewardsPoolContract.transact.distributeRewardWithProof(
  process.env.VEBETTERDAO_APP_ID,
  rewardAmount, // set the reward amount
  account, // user's wallet address
  proofTypes, // e.g. ['image', 'link']
  proofValues, // e.g. ['https://...', 'https://...']
  impactCodes, // e.g. ['waste_mass']
  impactValues, // e.g. [100]
  description  // e.g. "User recycled 1kg of plastic"
);
await tx.wait();

Your .env file should contain:

MNEMONIC=your twelve word phrase

VEBETTERDAO_APP_ID=your registered app ID

MNEMONIC=your twelve word phrase

VEBETTERDAO_APP_ID=your registered app ID

MNEMONIC=your twelve word phrase

VEBETTERDAO_APP_ID=your registered app ID

You can check the transaction onchain via: https://explore-testnet.vechain.org/

Set Up Your App on the Testnet

Integration (Solidity)

1. Meet VeChain

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