Initialize Pool

Creates a new liquidity pool on the CoolDEX.

Instruction

InitializeInstruction2 {
    nonce: u8,
    open_time: u64,
    init_pc_amount: u64,
    init_coin_amount: u64,
    fee_numerator: u16,
    burn_bp: u16,
}

Parameters

Parameter	Type	Description
nonce	u8	Nonce for PDAs
open_time	u64	Timestamp when the pool opens for trading
init_pc_amount	u64	Initial amount of quote token (typically SOL)
init_coin_amount	u64	Initial amount of base token
fee_numerator	u16	Fee numerator for the pool
burn_bp	u16	Portion of fees allocated to burning (in basis points)

Account Setup

#	Account	Description	Derivation
1	Token program	SPL Token program	TOKEN_PROGRAM_ID
2	Associated token account program	ATA program	ASSOCIATED_TOKEN_PROGRAM_ID
3	System program	System program	SystemProgram.programId
4	Rent sysvar	Rent program	SYSVAR_RENT_PUBKEY
5	AMM info	AMM account	coolDexSeed("amm_associated_seed")
6	AMM authority	AMM authority PDA	[Buffer.from("amm authority")]
7	AMM LP mint	LP token mint	coolDexSeed("lp_mint_associated_seed")
8	AMM coin mint	Coin token mint	Provided by user
9	AMM PC mint	Quote token mint (SOL)	NATIVE_MINT
10	AMM coin vault	Coin token vault	coolDexSeed("coin_vault_associated_seed")
11	AMM PC vault	Quote token (SOL) vault	coolDexSeed("pc_vault_associated_seed")
12	AMM config	AMM configuration account	[Buffer.from("amm_config_account_seed")]
13	Create fee destination	Platform fee account	Fixed address
14	Market info	Market account	Provided by user
15	User wallet	Transaction signer	User's wallet
16	User token coin	User's coin token account	getAssociatedTokenAddress(coinMint, userWallet, false)
17	User token PC	User's quote token (SOL) account	getAssociatedTokenAddress(NATIVE_MINT, userWallet, false)
18	User token LP	User's LP token account	getAssociatedTokenAddress(lpMint, userWallet, false)

Function Logic

1. Verifies the AMM config account is valid

2. Verifies the signer is the SC Bonding Curve deployer

3. Checks that the coin mint is not SOL (native mint)

4. Checks that the PC mint is SOL (native mint)

5. Creates target orders account

6. Creates LP mint account with the same decimals as the coin token

7. Creates coin vault and PC vault accounts

8. Creates AMM account

9. Creates user's associated token account for LP tokens

10. Transfers initial coin and PC amounts from user to the vaults

11. Calculates initial liquidity based on the geometric mean of both deposits

12. Mints LP tokens to the user

13. Initializes the AMM with specified parameters

14. Sets the initial pool state and parameters

Notes

• Only the SC Bonding Curve deployer can initialize pools

• The PC (quote) token must be the native SOL token

• The coin (base) token cannot be the native SOL token

• Initial LP tokens are minted to the user wallet minus a minimum amount kept in the pool

• The pool status is determined by the open_time parameter:

  • If open_time > current time: WaitingTrade status

  • Otherwise: SwapOnly status

Helper Function for Computing CoolDEX Addresses

function computeCoolDexAddresses(marketId) {
  const coolDexSeed = (suffix) =>
    PublicKey.findProgramAddressSync(
      [COOLDEX_PROGRAM_ID.toBuffer(), marketId.toBuffer(), Buffer.from(suffix)],
      COOLDEX_PROGRAM_ID
    )[0]
  return {
    ammId: coolDexSeed("amm_associated_seed"),
    poolCoinAccount: coolDexSeed("coin_vault_associated_seed"),
    poolQuoteAccount: coolDexSeed("pc_vault_associated_seed"),
    lpMint: coolDexSeed("lp_mint_associated_seed"),
  }
}

Example Usage

// Generate a new market ID
const marketId = Keypair.generate().publicKey

// Derive all AMM accounts using the helper function
const {
  ammId,
  poolCoinAccount,
  poolQuoteAccount,
  lpMint,
  targetOrdersAccount,
  ammOpenOrders,
} = computeCoolDexAddresses(marketId)

// Derive AMM authority
const [ammAuthority] = PublicKey.findProgramAddressSync(
  [Buffer.from("amm authority")],
  COOLDEX_PROGRAM_ID
)

// Derive AMM config
const [ammConfig] = PublicKey.findProgramAddressSync(
  [Buffer.from("amm_config_account_seed")],
  COOLDEX_PROGRAM_ID
)

// User token accounts
const userCoinAccount = getAssociatedTokenAddressSync(coinMint, wallet.publicKey, false)

const userWsolAccount = getAssociatedTokenAddressSync(
  NATIVE_MINT,
  wallet.publicKey,
  false
)

const userLpAccount = getAssociatedTokenAddressSync(lpMint, wallet.publicKey, false)

// Create instruction data
const data = Buffer.alloc(30)
data.writeUInt8(16, 0) // Initialize2 instruction
data.writeUInt8(nonce, 1) // Nonce
data.writeBigUInt64LE(BigInt(openTime), 2) // Open time
data.writeBigUInt64LE(BigInt(initPcAmount), 10) // Initial PC amount
data.writeBigUInt64LE(BigInt(initCoinAmount), 18) // Initial coin amount
data.writeUInt16LE(feeNumerator, 26) // Fee numerator
data.writeUInt16LE(burnBp, 28) // Burn basis points

// Create transaction instruction with all accounts
const initialize2Ix = new TransactionInstruction({
  programId: COOLDEX_PROGRAM_ID,
  keys: [
    { pubkey: TOKEN_PROGRAM_ID, isSigner: false, isWritable: false },
    { pubkey: ASSOCIATED_TOKEN_PROGRAM_ID, isSigner: false, isWritable: false },
    { pubkey: SystemProgram.programId, isSigner: false, isWritable: false },
    { pubkey: SYSVAR_RENT_PUBKEY, isSigner: false, isWritable: false },
    { pubkey: ammId, isSigner: false, isWritable: true },
    { pubkey: ammAuthority, isSigner: false, isWritable: false },
    { pubkey: lpMint, isSigner: false, isWritable: true },
    { pubkey: coinMint, isSigner: false, isWritable: false },
    { pubkey: NATIVE_MINT, isSigner: false, isWritable: false },
    { pubkey: poolCoinAccount, isSigner: false, isWritable: true },
    { pubkey: poolQuoteAccount, isSigner: false, isWritable: true },
    { pubkey: ammConfig, isSigner: false, isWritable: false },
    { pubkey: AMM_FEE_DESTINATION, isSigner: false, isWritable: true },
    { pubkey: marketId, isSigner: false, isWritable: true },
    { pubkey: wallet.publicKey, isSigner: true, isWritable: true },
    { pubkey: userCoinAccount, isSigner: false, isWritable: true },
    { pubkey: userWsolAccount, isSigner: false, isWritable: true },
    { pubkey: userLpAccount, isSigner: false, isWritable: true },
  ],
  data: data,
})