快速开始

mkdir powfi-quickstart && cd powfi-quickstart
npm init -y && npm pkg set type=module

import { Powfi } from '@alephium/powfi-sdk'

const powfi = Powfi.load({ networkId: 'testnet' })

import { ALPH_TOKEN_ID } from '@alephium/web3'
import { CpmmModule, NumericUtils } from '@alephium/powfi-sdk'

const alph = ALPH_TOKEN_ID
const baal = (await powfi.token.getTokenBySymbol('BAAL')).id // ALPH/BAAL has a CPMM pool on testnet

const pool = await powfi.cpmm.getPoolState(alph, baal)

const quote = CpmmModule.computeSwapAmount({
  state: pool,
  tokenInId: alph,
  tokenOutId: baal,
  amountIn: 10n * 10n ** 18n, // 10 ALPH (18 decimals)
  slippageBps: 50n // 0.5%
})

console.log({
  out: NumericUtils.scaleToString(quote.tokenOutAmount, quote.tokenOutInfo.decimals),
  minOut: NumericUtils.scaleToString(quote.minimalTokenOutAmount!, quote.tokenOutInfo.decimals),
  priceImpactPct: quote.priceImpact
})

import { PrivateKeyWallet } from '@alephium/web3-wallet'

const signer = new PrivateKeyWallet({
  privateKey: process.env.PRIVATE_KEY!,
  keyType: 'gl-secp256k1'
})
powfi.signer = signer
const { address } = await signer.getSelectedAccount()

const result = await powfi.cpmm.swap({
  tokenInId: alph,
  tokenOutId: baal,
  amountIn: 10n * 10n ** 18n,
  slippageBps: 50n,
  sender: address
})

console.log('txId', result.txId)

async function waitForTx(txId: string) {
  for (;;) {
    const status = await powfi.nodeProvider.transactions.getTransactionsStatus({ txId })
    if (status.type === 'Confirmed') return status
    await new Promise((r) => setTimeout(r, 2000))
  }
}

await waitForTx(result.txId)