Create Pool

1. Default Fee Options

The SDK provides predefined fee configurations for different types of trading pairs. These configurations are optimized based on asset volatility and market characteristics:

• binStep: The step size between bins, determining the price granularity of the pool. Smaller values provide finer price resolution but require more computational resources.

• baseFactor: A multiplier used in fee calculations, affecting the overall fee structure of the pool.

• fee: The trading fee rate as a decimal (e.g., '0.0001' = 0.01%). This is the fee charged for each swap transaction.

Fee Tier Recommendations:

• Low fees (0.01% - 0.05%): Best for stable pairs or low-volatility mainstream assets

• Medium fees (0.1% - 0.3%): Suitable for medium-volatility assets or mainstream trading pairs

• High fees (0.4% - 4%): Recommended for high-volatility assets, altcoins, or small market cap pairs

Base fee	Bin Step	Base factor
0.01%	1	10,000
0.02%	1	20,000
0.03%	2	15,000
0.04%	2	20,000
0.05%	5	10,000
0.10%	10	10,000
0.15%	15	10,000
0.20%	20	10,000
0.25%	25	10,000
0.30%	30	10,000
0.40%	50	8,000
0.60%	80	7,500
0.80%	100	8,000
1.00%	100	10,000
2.00%	200	10,000
4.00%	400	10,000

When creating a new pool, choose the fee configuration that best matches your trading pair's characteristics:

// Example: Create a pool for a stable pair (USDC/USDT)
const stablePairConfig = { binStep: 1, baseFactor: 10000, fee: '0.0001' }

// Example: Create a pool for a volatile altcoin pair
const altcoinConfig = { binStep: 100, baseFactor: 10000, fee: '0.01' }

2. Create Pool

There are two ways to create a pool:

Method 1: Create Pool Only

// Create a new pool without adding liquidity
const bin_step = 2
const base_factor = 10000
const price = '1.1'
const active_id = BinUtils.getBinIdFromPrice(price, bin_step, true, 6, 6)

const tx = new Transaction()
await sdk.Pool.createPoolPayload({
  active_id,
  bin_step,
  coin_type_a: '0x...::usdc::USDC',
  coin_type_b: '0x...::usdt::USDT',
  base_factor,
}, tx)

Method 2: Create Pool and Add Liquidity in One Transaction

// Create pool and add liquidity in one transaction
const bin_step = 2
const base_factor = 10000
const price = '1.1'
const active_id = BinUtils.getBinIdFromPrice(price, bin_step, true, 6, 6)

// Calculate liquidity distribution
const bin_infos = sdk.Position.calculateAddLiquidityInfo({
  active_id,
  bin_step,
  lower_bin_id: active_id - 10,
  upper_bin_id: active_id + 10,
  amount_a_in_active_bin: '0',
  amount_b_in_active_bin: '0',
  strategy_type: StrategyType.Spot,
  coin_amount: '10000000',
  fix_amount_a: true,
})

const createAndAddTx = await sdk.Pool.createPoolAndAddLiquidityPayload({
  active_id,
  lower_bin_id: active_id - 10,
  upper_bin_id: active_id + 10,
  bin_step,
  bin_infos,
  coin_type_a: '0x14a71d857b34677a7d57e0feb303df1adb515a37780645ab763d42ce8d1a5e48::usdc::USDC',
  coin_type_b: '0x14a71d857b34677a7d57e0feb303df1adb515a37780645ab763d42ce8d1a5e48::eth::ETH',
  strategy_type: StrategyType.Spot,
  use_bin_infos: false,
  base_factor,
})