@jup-ag/core

@jup-ag/core

Jupiter core typescript library

Installation

Yarn

yarn add @jup-ag/core

NPM

npm install @jup-ag/core

Usage

import bs58 from 'bs58'
import fetch from 'node-fetch'
import { Connection, PublicKey, Keypair } from '@solana/web3.js'
import { Jupiter, TOKEN_LIST_URL } from '@jup-ag/core'
const SOLANA_RPC_ENDPOINT = "https://solana-api.projectserum.com"
/* *******************
** Wallet/Keypair of Swapper
* *******************/
const WALLET_PRIVATE_KEY = process.env.WALLET_PRIVATE_KEY || "Paste private key here with funds to swap"
const USER_PRIVATE_KEY = bs58.decode(WALLET_PRIVATE_KEY)
const USER_KEYPAIR = Keypair.fromSecretKey(USER_PRIVATE_KEY)
const main = async () => {
    /* *******************
    ** Setup Solana RPC connection
    * *******************/
    const connection = new Connection(SOLANA_RPC_ENDPOINT)
    /* *******************
    ** Fetch token list from from Jupiter API
    ** tokens format
      {
        chainId: 101,
        address: '8f9s1sUmzUbVZMoMh6bufMueYH1u4BJSM57RCEvuVmFp',
        symbol: 'TRUE',
        name: 'TrueSight',
        decimals: 9,
        logoURI: 'https://i.ibb.co/pKTWrwP/true.jpg',
        tags: [ 'utility-token', 'capital-token' ]
      },
    * *******************/
    const tokens = await (await fetch(TOKEN_LIST_URL['mainnet-beta'])).json()
    // console.log(tokens)
    /* *******************
    ** Load Jupiter
    * *******************/
    const jupiter = await Jupiter.load({
        connection,
        cluster: 'mainnet-beta',
        user: USER_KEYPAIR // or public key
    })
    /* *******************
    ** Get routeMap, which maps each tokenMint and their respective tokenMints that are swappable
    * *******************/
    const routeMap = jupiter.getRouteMap()
    // console.log(routeMap)
    /* *******************
    ** Input token: USDC
    * *******************/
    const inputToken = tokens.find(t => t.address == 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v')
    console.log(inputToken)
    /* *******************
    ** Get possible pairs
    * *******************/
    const possiblePairs = routeMap.get(inputToken.address); // return an array of token mints that can be swapped with SOL
    const possiblePairsTokenInfo = {}
    possiblePairs.forEach( (address) => {
      possiblePairsTokenInfo[address] = tokens.find((t) => {
        return t.address == address
      })
    })
    // console.log(possiblePairsTokenInfo)
    /* *******************
    ** Output token: USDT
    * *******************/
    const outputToken = possiblePairsTokenInfo['Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB']
    console.log(outputToken)
    /* *******************
    ** Calculate routes for swapping USDC to USDT with 1% slippage
    ** routes are sorted based on outputAmount, so ideally the first route is the best.
    * *******************/
    const inputAmount = parseInt(0.01 * (10**inputToken.decimals))
    const slippagePercentage = 1
    const routes = await jupiter.computeRoutes(new PublicKey(inputToken.address), new PublicKey(outputToken.address), inputAmount, slippagePercentage);
    console.log('Quoted out amount: ', routes[0].outAmount)
    
    /* *******************
    ** Route Data
    {
      marketInfos: [
        {
          marketMeta: [Object],
          inputMint: [PublicKey],
          outputMint: [PublicKey],
          notEnoughLiquidity: false,
          minInAmount: undefined,
          inAmount: 10000,
          outAmount: 9993,
          outAmountWithSlippage: 9893,
          minOutAmount: undefined,
          priceImpactPct: 0,
          feeAmount: 4,
          feeMint: 'Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB',
          feePct: 0.0004
        }
      ],
      getDepositAndFee: [Function: getDepositAndFee],
      inAmount: 10000,
      outAmount: 9993,
      outAmountWithSlippage: 9893,
      priceImpactPct: 0
    }
    * *******************/
    // console.log(routes[0])
    /* *******************
    ** Prepare execute exchange
    * *******************/
    const { execute } = await jupiter.exchange({
        route: routes[0]
    })
    /* *******************
    ** Swap for keypair
    * *******************/
    const swapResult = await execute()
    if (swapResult.error) {
        console.log(swapResult.error)
    } else {
        console.log(`https://explorer.solana.com/tx/${swapResult.txid}`)
        console.log(`inputAddress=${swapResult.inputAddress.toString()} outputAddress=${swapResult.outputAddress.toString()}`)
        console.log(`inputAmount=${swapResult.inputAmount} outputAmount=${swapResult.outputAmount}`)
    }
}

main()