Code Examples

Practical code examples for interacting with Dollar Infinite via JavaScript (ethers.js recommended).

Common prerequisites for all examples:

javascript

const ethers = require('ethers');

// Basic configuration
const provider = new ethers.providers.JsonRpcProvider('https://bsc-dataseed.binance.org/');
const wallet = new ethers.Wallet(process.env.PRIVATE_KEY, provider); // use .env or hardware wallet

const VAULT_ADDRESS = '0x...'; // real Vault address (get from official site or BSCScan)
const USDT_ADDRESS = '0x55d398326f99059fF775485246999027B3197955';

// Minimal ABI (get complete from BSCScan)
const VAULT_ABI = [
  'function deposit(uint256 amount, uint8 lockDays) external',
  'function withdraw(uint256 positionId) external',
  'function getUserPositions(address user) external view returns (tuple(uint256 id, uint256 amount, uint8 lockDays, uint256 startTime, uint256 endTime, uint256 rewards)[])',
  'function getPendingRewards(uint256 positionId) external view returns (uint256)'
];

const vault = new ethers.Contract(VAULT_ADDRESS, VAULT_ABI, wallet);

Example 1: Approve USDT and Deposit (100 USDT, 10 days)

javascript

async function makeDeposit() {
  const usdt = new ethers.Contract(USDT_ADDRESS, [
    'function approve(address spender, uint256 amount) external returns (bool)'
  ], wallet);

  const amount = ethers.utils.parseUnits('100', 18); // 100 USDT
  const lockDays = 10;

  // Approve
  console.log('Approving USDT...');
  const approveTx = await usdt.approve(VAULT_ADDRESS, amount);
  await approveTx.wait();
  console.log('Approve completed:', approveTx.hash);

  // Deposit
  console.log('Making deposit...');
  const depositTx = await vault.deposit(amount, lockDays);
  await depositTx.wait();
  console.log('Deposit completed! Tx hash:', depositTx.hash);
}

makeDeposit().catch(console.error);

Example 2: Check Positions and Pending Rewards

javascript

async function checkPositionsAndRewards() {
  const userAddress = wallet.address;
  console.log('Querying user positions:', userAddress);

  const positions = await vault.getUserPositions(userAddress);
  
  if (positions.length === 0) {
    console.log('No active positions.');
    return;
  }

  for (const pos of positions) {
    const id = pos.id.toString();
    const amount = ethers.utils.formatUnits(pos.amount, 18);
    const lockDays = pos.lockDays;
    const rewards = ethers.utils.formatUnits(await vault.getPendingRewards(pos.id), 18);

    console.log(`Position #${id}:`);
    console.log(`  - Amount: ${amount} USDT`);
    console.log(`  - Lock: ${lockDays} days`);
    console.log(`  - Pending rewards: ${rewards} USDT`);
  }
}

checkPositionsAndRewards().catch(console.error);

Example 3: Withdraw (Withdraw matured position)

javascript

async function withdrawPosition(positionId) {
  console.log(`Withdrawing position #${positionId}...`);

  const tx = await vault.withdraw(positionId);
  await tx.wait();
  
  console.log('Withdraw completed! Tx hash:', tx.hash);
  console.log('Check on BSCScan: https://bscscan.com/tx/' + tx.hash);
}

withdrawPosition(123).catch(console.error); // replace 123 with real ID

Example 4: Claim Affiliate Commissions (if available)

javascript

const AFFILIATE_ADDRESS = '0x...'; // real address
const AFFILIATE_ABI = [
  'function claimCommissions() external',
  'function getPendingCommissions(address user) external view returns (uint256)'
];

const affiliate = new ethers.Contract(AFFILIATE_ADDRESS, AFFILIATE_ABI, wallet);

async function claimAffiliate() {
  const pending = await affiliate.getPendingCommissions(wallet.address);
  console.log('Pending commissions:', ethers.utils.formatUnits(pending, 18), 'USDT');

  if (pending.gt(0)) {
    const tx = await affiliate.claimCommissions();
    await tx.wait();
    console.log('Claim completed! Tx hash:', tx.hash);
  } else {
    console.log('No pending commissions.');
  }
}

claimAffiliate().catch(console.error);

Usage Tips

• Security: Never expose PRIVATE_KEY in frontend code or GitHub

• Error Handling: Always use try/catch and parse revert reasons

• Events: Monitor events like 'Deposited', 'Withdrawn' with provider.on()

• Testing: Use small amounts ($10-50) to validate integration

• Complete ABI: Always get from BSCScan to avoid errors

Warning: These are educational examples. Adapt to your case and verify official addresses/ABIs.

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