ウォレット統合

token_a_owned = user_lp_balance * poolReserves.A / lpMint.supply
token_b_owned = user_lp_balance * poolReserves.B / lpMint.supply
usd_value     = token_a_owned * priceA_usd + token_b_owned * priceB_usd

import { CLMM_PROGRAM_ID } from "@raydium-io/raydium-sdk-v2";

const [positionPda] = PublicKey.findProgramAddressSync(
  [Buffer.from("position"), nftMint.toBuffer()],
  CLMM_PROGRAM_ID,
);

const accountInfo = await connection.getAccountInfo(positionPda);
if (!accountInfo || !accountInfo.owner.equals(CLMM_PROGRAM_ID)) return null;
// It's a Raydium CLMM position — decode.

// Try all three farm versions for each of the user's potential farm interactions.
// Cheapest approach: ask the API first, which has indexed all user positions.

const r = await fetch(
  `https://api-v3.raydium.io/positions/staking?wallet=${user.toBase58()}`
).then(r => r.json());

for (const s of r.data.stakings) {
  // s.farmId, s.stakedAmount, s.pendingRewards[], s.poolApr, ...
}

const poolInfo = await raydium.<type>.getPoolInfoFromRpc({ poolId });
const myShare  = userLpBalance / poolInfo.lpMint.supply;
const tokensA  = BigInt(poolInfo.mintAmountA) * BigInt(userLpBalance)
                / BigInt(poolInfo.lpMint.supply);
const tokensB  = BigInt(poolInfo.mintAmountB) * BigInt(userLpBalance)
                / BigInt(poolInfo.lpMint.supply);

const position = await raydium.clmm.getPositionInfo({ positionPda });
const pool     = await raydium.clmm.getPoolInfoFromRpc({ poolId: position.poolId });

const { amountA, amountB } = PoolUtils.getAmountsFromLiquidity({
  sqrtPriceX64:  pool.sqrtPriceX64,
  tickLower:     position.tickLower,
  tickUpper:     position.tickUpper,
  liquidity:     position.liquidity,
  slippage:      0,  // for display, no slippage
});

// Pending fees — display separately as "uncollected"
const fees = {
  A: position.tokenFeesOwedA,
  B: position.tokenFeesOwedB,
};

// Pending rewards — a CLMM pool has 0–3 reward streams.
const rewards = position.rewardInfos.map(r => ({
  mint:          r.rewardMint,
  rewardAmount:  r.rewardAmountOwed,
}));

// The API response already includes pending rewards; use it directly.
const apr       = stakingFarm.apr;               // %, annualized
const staked    = stakingFarm.stakedAmount;      // smallest units of staking mint
const rewards   = stakingFarm.pendingRewards;    // array of { mint, amount }

pending_reward_i = user.deposited
                 * farm.reward_per_share_x64[i] / 2^64
                 - user.reward_debts[i]

const sim = await connection.simulateTransaction(tx, {
  sigVerify: false,
  commitment: "confirmed",
  accounts: {
    encoding: "base64",
    addresses: [userTokenAtaA, userTokenAtaB, userLpAta].map(a => a.toBase58()),
  },
});

// Decode each returned account's balance and diff against pre-tx balances.
for (const [i, acctData] of sim.value.accounts!.entries()) {
  const newBalance = decodeTokenAccount(acctData!.data[0]).amount;
  // compare to pre-tx balance, show Δ
}

let apr = 0;
for (const r of farm.rewardInfos) {
  if (r.rewardState !== 1) continue;   // skip not-running
  const annualRewardTokens = Number(r.emissionPerSecond) * 86400 * 365 / 1e<decimals>;
  const annualRewardValue  = annualRewardTokens * priceUsd(r.rewardMint);
  const tvlValue           = Number(farm.totalStaked) * priceUsd(farm.stakingMint) / 1e<decimals>;
  apr += annualRewardValue / tvlValue;
}