💱 Create Pool

Create a Pool 💱

To create a new Pool we need to introduce some new Helper functions from the @saros-finance/sdk :

CreatePool.tsx

TypeScript

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import {
  convertBalanceToWei,
  createPool,
  genConnectionSolana,
} from "@saros - finance / sdk";

import { PublicKey, clusterApiUrl, Connection } from "@solana / web3.js";

BigNumber Support

Also we will be needing BN Module which is installed by the command :

Terminal

$ npm install bn.js

After Successfully adding BN Module, then we can now use it on our Code like :

CreatePool.tsx

TypeScript

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import BN from "bn.js";

Connection

Then we need a Connection to the Solana Cluster(network). we can use the saros-finanace genConnectionSolana helper function or use the solana Connection Class

CreatePool.tsx

TypeScript

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//using @saros-finance genConnectionSolana function
const connection = genConnectionSolana();

//using @solana/web3.js Connection
const connection = new Connection(clusterApiUrl.mainnet, "confirmed");

Create Pool Configs

So now that we are almost ready lets configure some of the configurations we are going to use.

CreatePool.tsx

TypeScript

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//Token Program ID
const TOKEN_PROGRAM_ID = new PublicKey(
  "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
);

//SAROS SWAP PROGRAM
const SAROS_SWAP_PROGRAM_ADDRESS_V1 = new PublicKey(
  "SSwapUtytfBdBn1b9NUGG6foMVPtcWgpRU32HToDUZr"
);

const userAccount = "5UrM9csUEDBeBqMZTuuZyHRNhbRW4vQ1MgKJDrKU1U2v"; // owner address

const FEE_OWNER = "FDbLZ5DRo61queVRH9LL1mQnsiAoubQEnoCRuPEmH9M8";

const mintAddressUsdt = "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB";
const mintAddressUsdc = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v";

POOLS

SPL Tokens and Pool Params in this example we will use the tokens C98 and USDC

CreatePool.tsx

TypeScript

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// Pool example on saros C98 to USDC
const USDC_TOKEN = {
  id: "usd - coin",
  mintAddress: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
  symbol: "usdc",
  name: "USD Coin",
  icon: "https://raw.githubusercontent.com / solana - labs / token - list / main / assets / mainnet / EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v / logo.png",
  decimals: "6",
  addressSPL: "FXRiEosEvHnpc3XZY1NS7an2PB1SunnYW1f5zppYhXb3",
};

const C98_TOKEN = {
  id: "coin98",
  mintAddress: "C98A4nkJXhpVZNAZdHUA95RpTF3T4whtQubL3YobiUX9",
  symbol: "C98",
  name: "Coin98",
  icon: "https://coin98.s3.ap - southeast - 1.amazonaws.com / Coin / c98 - 512.svg",
  decimals: "6",
  addressSPL: "EKCdCBjfQ6t5FBfDC2zvmr27PgfVVZU37C8LUE4UenKb",
};

//PoolParams
const poolParams = {
  address: "2wUvdZA8ZsY714Y5wUL9fkFmupJGGwzui2N74zqJWgty",
  tokens: {
    C98A4nkJXhpVZNAZdHUA95RpTF3T4whtQubL3YobiUX9: {
      ...C98_TOKEN,
    },
    EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v: {
      ...USDC_TOKEN,
    },
  },
  tokenIds: [
    "C98A4nkJXhpVZNAZdHUA95RpTF3T4whtQubL3YobiUX9",
    "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
  ],
};

CreatePool Parameters

createPool helper function from @saros-finance/sdk need some args to pass to it when calling which are as follows:

• connection: a solana network(cluster) instance or RPC connection.
• userAccount: user solana address(string)
• fee Account: address of the fee receiver(PublicKey)
• token0Mint: the mint address of the first token(PublicKey)
• token1Mint: the mint address of the Second token(PublicKey)
• token0Account: the user token account of the first token(PublicKey)
• token1Account: the user token account of the Second token(PublicKey)
• token0convertedAmount: the converted amount of the first token using the helper function convertBalanceToWei() from @saros-finance/sdk
• token1convertedAmount: the converted amount of the second token using the helper function convertBalanceToWei() from @saros-finance/sdk
• curveType: the type of the pool, is it a stablecoin pool or normal SPLS(non-stable)
• curveParameter: same as CurveType (is it a stablecoin pool type?)(BN) in bigNumber here.
• TOKEN_PROGRAM_ID: the program id of token
• SAROSWAP_PROGRAM_ID: the program address of Saros Swap Program

Now that we are more than ready, lets start implementing our handleCreatePool function.

Usage

CreatePool.tsx

TypeScript

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const handleCreatePool = async () => {
  try {
    const token0Mint = USDC_TOKEN.mintAddress;
    const token1Mint = C98_TOKEN.mintAddress;
    const token0Account = USDC_TOKEN.addressSPL;
    const token1Account = C98_TOKEN.addressSPL;

    const isStableCoin = 
    (token0Mint === mintAddressUsdt && token1Mint === mintAddressUsdc) || 
    (token0Mint === mintAddressUsdc && token1Mint === mintAddressUsdt);

    const curveType = isStableCoin ? 1: 0;
    const curveParameter = isStableCoin ? 1: 0;
    const convertFromAmount = convertBalanceToWei(1, USDC_TOKEN.decimals);
    const convertToAmount = convertBalanceToWei(1, C98_TOKEN.decimals);

    const createPoolResponse = await createPool(
      connection,
      accountSol,
      new PublicKey(FEE_OWNER),
      new PublicKey(token0Mint),
      new PublicKey(token1Mint),
      new PublicKey(token0Account),
      new PublicKey(token1Account),
      convertFromAmount,
      convertToAmount,
      curveType,
      new BN(curveParameter),
      TOKEN_PROGRAM_ID,
      SAROS_SWAP_PROGRAM_ADDRESS_V1
    );
    const { isError } = createPoolResponse;

    if (isError) {
      throw new Error();
    }

    return createPoolResponse.hash;

  } catch (error) {
    if (error instanceOf Error) {
      console.error(error.message)
    }
  }
};