Node.js Example: Creating a Static Wallet

Run this code on a trusted server. Static-wallet creation has no request idempotency contract, so do not automatically retry an unknown outcome.

const crypto = require('node:crypto')

function canonicalJson(payload) {
  return JSON.stringify(payload)
    .replace(/\//g, '\\/')
    .replace(/[\u0080-\uFFFF]/g, character =>
      `\\u${character.charCodeAt(0).toString(16).padStart(4, '0')}`
    )
}

function legacySign(body, apiKey) {
  const payloadBase64 = Buffer.from(body, 'utf8').toString('base64')
  return crypto.createHash('md5').update(payloadBase64 + apiKey).digest('hex')
}

async function createStaticWallet({ merchantId, apiKey, network, coin }) {
  const payload = {
    network,
    coin,
    type: 'static',
    label: 'Checkout deposits',
    webhook_url: 'https://merchant.example/coinssend/webhook'
  }
  const body = canonicalJson(payload)

  const response = await fetch('https://api.coinssend.com/v1/wallet-address', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Merchant: merchantId,
      Sign: legacySign(body, apiKey)
    },
    body
  })

  const result = await response.json()
  if (!response.ok) {
    throw new Error(result.error || result.message || `HTTP ${response.status}`)
  }

  return result.data
}

const wallet = await createStaticWallet({
  merchantId: process.env.COINSSEND_MERCHANT_ID,
  apiKey: process.env.COINSSEND_API_KEY,
  network: 'tron',
  coin: 'usdt'
})

console.log(wallet.address, wallet.qr_code_url)

Discover the current pair catalog at GET /v1/coins-and-fee; do not treat the example pair as a permanent availability guarantee.