Mercurial Amm Dynamic SDK

Getting started

NPM: https://www.npmjs.com/package/@mercurial-finance/dynamic-amm-sdk

SDK: https://github.com/mercurial-finance/mercurial-dynamic-amm-sdk

Discord: https://discord.com/channels/841152225564950528/864859354335412224

Install

1. Install deps

npm i @mercurial-finance/dynamic-amm-sdk @project-serum/anchor @solana/web3.js @solana/spl-token @solana/spl-token-registry

2. Initialize AmmImpl instance

import AmmImpl, { MAINNET_POOL } from '@mercurial-finance/dynamic-amm-sdk';
import { PublicKey } from '@solana/web3.js';
import { Wallet, AnchorProvider } from '@project-serum/anchor';

// Connection, Wallet, and AnchorProvider to interact with the network
const mainnetConnection = new Connection('https://api.mainnet-beta.solana.com');
const mockWallet = new Wallet(new Keypair());
const provider = new AnchorProvider(mainnetConnection, mockWallet, {
  commitment: 'confirmed',
});
// Alternatively, to use Solana Wallet Adapter

// https://station.jup.ag/blog/jupiter-token-list-api#endpoints
const tokenList = await fetch('https://token.jup.ag/all').then(res => res.json());
const USDC = tokenList.find(token => token.address === <USDC_ADDRESS>);
const USDT = tokenList.find(token => token.address === <USDT_ADDRESS>);
const SOL = tokenList.find(token => token.address === <SOL_ADDRESS>);
const constantProductPool = await AmmImpl.create(connection, MAINNET_POOL.USDC_SOL, USDC, SOL);
const stablePool = await AmmImpl.create(connection, MAINNET_POOL.USDT_USDC, USDT, USDC);

// If you need to create multiple, can consider using `createMultiple`
const pools = [
  {
    pool: MAINNET_POOL.USDC_SOL,
    tokenInfoA: USDC,
    tokenInfoB: SOL
  },
  {
    pool: MAINNET_POOL.USDT_USDC,
    tokenInfoA: USDT,
    tokenInfoB: USDC
  }
]
const [constantProductPool, stablePool] = await AmmImpl.createMultiple(connection, pools)

3. To interact with the AmmImpl

• Get Lp Supply

// To refetch the pool's latest supply
// Alternatively, use `AmmImpl.poolState.lpSupply`
const lpSupply = await constantProductPool.getLpSupply();

• Check pool balance

// Get the user's ATA LP balance
const userLpBalance = await constantProductPool.getUserBalance(mockWallet.publicKey);

• Update pool state (It's recommended to update the deposit before perform any quotation)

await constantProduct.updateState();

• Deposit to constant product

const inAmountALamport = new BN(1 * 10 ** constantProductPool.tokenA.decimals); // 1.0 SOL

// Get deposit quote for constant product
const { poolTokenAmountOut, tokenAInAmount, tokenBInAmount } = constantProductPool.getDepositQuote(
  inAmountALamport,
  new BN(0),
);

const depositTx = await constantProductPool.deposit(
  mockWallet.publicKey,
  tokenAInAmount,
  tokenBInAmount,
  poolTokenAmountOut,
); // Web3 Transaction Object
const depositResult = await provider.sendAndConfirm(depositTx); // Transaction hash

• Balance deposit to stable pool

const inAmountALamport = new BN(0.1 * 10 ** stablePool.tokenA.decimals);

const { poolTokenAmountOut, tokenAInAmount, tokenBInAmount } = stablePool.getDepositQuote(inAmountALamport, new BN(0));

const depositTx = await stablePool.deposit(mockWallet.publicKey, tokenAInAmount, tokenBInAmount, poolTokenAmountOut); // Web3 Transaction Object
const depositResult = await provider.sendAndConfirm(depositTx); // Transaction hash

• Double side imbalance deposit to stable pool

const inAmountALamport = new BN(0.1 * 10 ** stablePool.tokenA.decimals);
const inAmountBLamport = new BN(0.1 * 10 ** stablePool.tokenB.decimals);

const { poolTokenAmountOut, tokenAInAmount, tokenBInAmount } = stablePool.getDepositQuote(
  inAmountALamport,
  inAmountBLamport,
  false, // pass in false for imbalance deposit quote
); // Web3 Transaction Object
const depositTx = await stablePool.deposit(mockWallet.publicKey, tokenAInAmount, tokenBInAmount, poolTokenAmountOut);
const depositResult = await provider.sendAndConfirm(depositTx); // Transaction hash

• Single side imbalance deposit to stable pool

const inAmountALamport = new BN(0.1 * 10 ** stablePool.tokenA.decimals);

const { poolTokenAmountOut, tokenAInAmount, tokenBInAmount } = stablePool.getDepositQuote(
  inAmountALamport,
  new BN(0),
  false, // pass in false for imbalance deposit quote
); // Web3 Transaction Object
const depositTx = await stablePool.deposit(mockWallet.publicKey, tokenAInAmount, tokenBInAmount, poolTokenAmountOut);
const depositResult = await provider.sendAndConfirm(depositTx); // Transaction hash

• Balance withdraw from constant product

const outTokenAmountLamport = new BN(0.1 * 10 ** cpPool.decimals);

const { poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount } = cpPool.getWithdrawQuote(outTokenAmountLamport); // use lp balance for full withdrawal
const withdrawTx = await cpPool.withdraw(mockWallet.publicKey, poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount); // Web3 Transaction Object
const withdrawResult = await provider.sendAndConfirm(withdrawTx); // Transaction hash

• Balance withdraw from stable pool

const outTokenAmountLamport = new BN(0.1 * 10 ** stablePool.decimals);

const { poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount } = stablePool.getWithdrawQuote(outTokenAmountLamport); // use lp balance for full withdrawal
const withdrawTx = await stablePool.withdraw(mockWallet.publicKey, poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount); // Web3 Transaction Object
const withdrawResult = await provider.sendAndConfirm(withdrawTx);

• Imbalance withdraw from stable pool

const outTokenAmountLamport = new BN(0.1 * 10 ** stablePool.decimals);

const { poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount } = stablePool.getWithdrawQuote(
  outTokenAmountLamport,
  new PublicKey(stablePool.tokenA.address), // Pass in token A/B mint to perform imbalance withdraw
);
const withdrawTx = await stablePool.withdraw(mockWallet.publicKey, poolTokenAmountIn, tokenAOutAmount, tokenBOutAmount); // Web3 Transaction Object
const withdrawResult = await provider.sendAndConfirm(withdrawTx);

• Swap

const inAmountLamport = new BN(0.1 * 10 ** constantProductPool.tokenB.decimals);

// Swap SOL → USDT
const { minSwapOutAmount } = constantProductPool.getSwapQuote(
  new PublicKey(constantProductPool.tokenB.address),
  inAmountLamport,
);

const swapTx = await constantProductPool.swap(
  mockWallet.publicKey,
  new PublicKey(constantProductPool.tokenB.address),
  inAmountLamport,
  minSwapOutAmount,
);
const swapResult = await provider.sendAndConfirm(swapTx);

• Update pool state

constantProductPool.updateState();