LaunchLab PlatformConfig

const [platformConfigPda] = PublicKey.findProgramAddressSync(
  [
    Buffer.from("platform_config"),
    platformAdmin.toBuffer(),       // platform's owning pubkey
  ],
  LAUNCHLAB_PROGRAM_ID,
);

// states/platform_config.rs
pub const PLATFORM_CONFIG_SEED: &str = "platform_config";
pub const NAME_SIZE: usize = 64;
pub const WEB_SIZE:  usize = 256;
pub const IMG_SIZE:  usize = 256;
pub const MAX_CREATOR_FEE_RATE: u64 = 5000;       // 50 bps (denominator 1_000_000)
pub const MAX_TRANSFER_FEE_RATE: u16 = 500;       // 5%   (denominator 10_000)
pub const MAX_CURVE_PARAMS: usize = 10;

#[account]
pub struct PlatformConfig {
    pub epoch:                       u64,
    pub platform_fee_wallet:         Pubkey,            // signs ClaimPlatformFee
    pub platform_nft_wallet:         Pubkey,            // receives the platform NFT slice at CPMM graduation
    pub platform_scale:              u64,               // share of LP minted to platform NFT
    pub creator_scale:               u64,               // creator share before upgrade; added to platform share afterward
    pub burn_scale:                  u64,               // share of LP burned permanently
    pub fee_rate:                    u64,               // platform's trade fee (1/1_000_000)
    pub name:                        [u8; 64],          // utf-8 padded with zeros
    pub web:                         [u8; 256],
    pub img:                         [u8; 256],
    pub cpswap_config:               Pubkey,            // CPMM AmmConfig that the post-grad pool will bind to
    pub creator_fee_rate:            u64,               // creator-side fee taken pre-graduation
    pub transfer_fee_extension_auth: Pubkey,            // for Token-2022 launches: who inherits transfer-fee authorities post-graduation
    pub platform_vesting_wallet:     Pubkey,
    pub platform_vesting_scale:      u64,               // platform's slice of total_locked_amount
    pub platform_cp_creator:         Pubkey,            // optional creator-of-record on the post-graduation CPMM pool
    pub restrict_global_config:      u8,                // 0 = unrestricted, 1 = require allow PDA
    pub padding:                     [u8; 107],
    pub curve_params:                Vec<PlatformCurveParam>, // whitelist of permitted curve shapes
}

function readString(bytes: Uint8Array): string {
  const end = bytes.indexOf(0);
  return Buffer.from(end === -1 ? bytes : bytes.subarray(0, end)).toString("utf-8");
}

trade_fee     = amount_in × global_config.trade_fee_rate    / 1_000_000
platform_fee  = amount_in × platform_config.fee_rate        / 1_000_000
creator_fee   = amount_in × platform_config.creator_fee_rate / 1_000_000

amount_after_fee = amount_in − trade_fee − platform_fee − creator_fee

lp_to_platform = floor(lp_total × (platform_scale + creator_scale) / 1_000_000)
lp_to_burn     = lp_total − lp_to_platform

#[derive(AnchorSerialize, AnchorDeserialize, Clone)]
pub struct PlatformCurveParam {
    pub epoch:                u64,
    pub index:                u8,           // ordinal within this platform's whitelist
    pub global_config:        Pubkey,       // which GlobalConfig this entry applies to
    pub bonding_curve_param:  BondingCurveParam,
    pub padding:              [u64; 50],
}

#[derive(AnchorSerialize, AnchorDeserialize, Clone)]
pub struct BondingCurveParam {
    pub migrate_type:               u8,    // new launches require 1 = CPMM; u8::MAX = wildcard
    pub migrate_cpmm_fee_on:        u8,    // 0 = quote-only, 1 = both. u8::MAX = wildcard
    pub supply:                     u64,   // 0 = wildcard
    pub total_base_sell:            u64,   // 0 = wildcard
    pub total_quote_fund_raising:   u64,   // 0 = wildcard
    pub total_locked_amount:        u64,   // u64::MAX = wildcard
    pub cliff_period:               u64,   // u64::MAX = wildcard
    pub unlock_period:              u64,   // u64::MAX = wildcard
}

pub const PLATFORM_ALLOW_CONFIG_SEED: &str = "platform_allow_config";

#[account]
pub struct PlatformAllowConfig {
    pub bump:            u8,
    pub platform_config: Pubkey,
    pub global_config:   Pubkey,
    pub padding:         [u64; 8],
}

const platformConfig = await raydium.launchpad.getPlatformConfig(platformConfigPda);

console.log("Platform:", readString(platformConfig.name));
console.log("Fee rate:", platformConfig.feeRate, "(/1M)");
console.log("NFT split:",
  platformConfig.platformScale,
  platformConfig.creatorScale,
  platformConfig.burnScale,
);
console.log("Curve whitelist size:", platformConfig.curveParams.length);