錢包整合

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;
// 這是一個 Raydium CLMM 部位 — 解碼。

// 對於使用者的每個潛在農場互動，嘗試所有三個農場版本。
// 最便宜的方法：先詢問 API，它已索引所有使用者部位。

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, ...
}

// AMM v4
const { poolInfo, poolRpcData } = await raydium.liquidity.getPoolInfoFromRpc({ poolId: POOL_ID });
// CPMM
// const { poolInfo, rpcData } = await raydium.cpmm.getPoolInfoFromRpc(POOL_ID);

// `poolInfo.lpMint` 是一個 ApiV3Token，沒有 `supply` 欄位。從鏈上讀取 LP mint 的
// 供應量，或使用池自己的鏡像：
const lpSupply = BigInt(poolRpcData.lpAmount.toString());

const tokensA = BigInt(poolInfo.mintAmountA) * BigInt(userLpBalance) / lpSupply;
const tokensB = BigInt(poolInfo.mintAmountB) * BigInt(userLpBalance) / lpSupply;

const pool      = await raydium.clmm.getPoolInfoFromRpc(POOL_ID);   // base58 字串
const positions = await raydium.clmm.getOwnerPositionInfo({
  programId: pool.poolInfo.programId,
});
const position  = positions.find((p) => p.poolId.toBase58() === pool.poolInfo.id)!;

// getAmountsFromLiquidity 是非同步的，接受 epochInfo + poolInfo + add，
// 並傳回費用包裝的金額。
const { amountA, amountB } = await PoolUtils.getAmountsFromLiquidity({
  epochInfo:  await raydium.fetchEpochInfo(),
  poolInfo:   pool.poolInfo,
  tickLower:  position.tickLower,
  tickUpper:  position.tickUpper,
  liquidity:  position.liquidity,
  slippage:   0,      // 用於顯示，無滑點
  add:        false,
});
// amountA.amount / amountB.amount 是 BN；.fee 是 Token-2022 轉帳費用。

// 待領費用 — 單獨顯示為「未收取」
const fees = {
  A: position.tokenFeesOwedA,
  B: position.tokenFeesOwedB,
};

// 待領獎勵 — CLMM 池有 0–3 個獎勵流。部位的
// rewardInfos 條目只有 { growthInsideLastX64, rewardAmountOwed }，所以
// mint 必須來自同一索引處的池的 rewardInfos。
const rewards = position.rewardInfos.map((r, i) => ({
  mint:         pool.poolInfo.rewardDefaultInfos[i]?.mint,
  rewardAmount: r.rewardAmountOwed,
}));

// API 回應已包含待領獎勵；直接使用它。
const apr       = stakingFarm.apr;               // %，年化
const staked    = stakingFarm.stakedAmount;      // 質押 mint 的最小單位
const rewards   = stakingFarm.pendingRewards;    // { mint, amount } 的陣列

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()),
  },
});

// 解碼每個傳回帳戶的餘額，並與交易前餘額進行比較。
for (const [i, acctData] of sim.value.accounts!.entries()) {
  const newBalance = decodeTokenAccount(acctData!.data[0]).amount;
  // 與交易前餘額比較，顯示 Δ
}

let apr = 0;
for (const r of farm.rewardInfos) {
  if (r.rewardState !== 1) continue;   // 跳過未執行的
  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;
}