@mercurial-finance/dynamic-amm-sdk

Mercurial Vault 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

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Install

1. Install deps

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

1. Initialize AmmImpl instance

import AmmImpl, { MAIN_POOL_USDT_SOL, MAIN_POOL_USDT_USDC } from '@mercurial-finance/mercurial-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

const constantProductPool = await AmmImpl.create(connection, MAIN_POOL_USDT_SOL);
const stablePool = await AmmImpl.create(connection, MAIN_POOL_USDT_USDC);

1. 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);

• 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 } = await 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 } = await 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 } = await 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 } = await 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 } = await 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 } = await 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 } = await stablePool.getWithdrawQuote(
  outTokenAmountLamport,
  new PublicKey(stablePool.tokenA.address),
);
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 swapQuote = await constantProductPool.getSwapQuote(
  new PublicKey(constantProductPool.tokenB.address),
  inAmountLamport,
);

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