import express from 'express'
import { Mppx, algorand } from '@goplausible/algorand-mpp-sdk/server'

const mppx = Mppx.create({
  secretKey: process.env.MPP_SECRET_KEY,
  methods: [
    algorand.charge({
      recipient: 'YOUR_ALGO_ADDRESS',
      network: 'algorand:SGO1GKSzyE7IEPItTxCByw9x8FmnrCDexi9/cOUJOiI=',
      algodUrl: 'https://testnet-api.4160.nodely.dev',
    }),
  ],
})

const app = express()

app.get('/api/data', async (req, res) => {
  const webReq = toWebRequest(req) // convert Express req to Web Request
  const result = await mppx.charge({
    amount: '10000',       // 0.01 ALGO
    currency: 'ALGO',
    description: 'API data access',
  })(webReq)

  if (result.status === 402) {
    const challenge = result.challenge as Response
    res.writeHead(challenge.status, Object.fromEntries(challenge.headers))
    res.end(await challenge.text())
    return
  }

  const response = result.withReceipt(Response.json({ data: '...' })) as Response
  res.writeHead(response.status, Object.fromEntries(response.headers))
  res.end(await response.text())
})

import { Mppx, algorand } from '@goplausible/algorand-mpp-sdk/client'

// signTransactions from @txnlab/use-wallet
const method = algorand.charge({
  signer: signTransactions,
  senderAddress: activeAccount.address,
  algodUrl: 'https://testnet-api.4160.nodely.dev',
})

const mppx = Mppx.create({ methods: [method] })

// Automatically handles 402 → pay → retry
const response = await mppx.fetch('https://api.example.com/api/data')
const data = await response.json()

algorand.charge({
  recipient: 'SELLER_ADDRESS',
  network: 'algorand:SGO1GKSzyE7IEPItTxCByw9x8FmnrCDexi9/cOUJOiI=',
  algodUrl: 'https://testnet-api.4160.nodely.dev',
  // ASA payment (USDC)
  asaId: 10458941n,
  decimals: 6,
  // Fee sponsorship
  signer: feePayerSigner,
  signerAddress: 'FEE_PAYER_ADDRESS',
})