Yield Farming dan Imbalan Staking
Pahami cara kontrak imbalan yield farming dan staking DeFi mendistribusikan token dari waktu ke waktu, termasuk pola akuntansi imbalan per token yang digunakan protokol besar.
Yield Farming dan Imbalan Staking adalah pelajaran Blockchain Smart Contracts with Solidity gratis di CoddyKit. Ini adalah pelajaran 4 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar Blockchain Smart Contracts with Solidity, dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus Blockchain Smart Contracts with Solidity mencakup 4 pelajaran total.
Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.
What Is Yield Farming?
Yield farming means depositing tokens into a protocol to earn additional token rewards. Users stake an asset, and the protocol distributes a reward token continuously over time to incentivize participation.
The Core Challenge
The hard part is fairly splitting rewards among many stakers who deposit and withdraw at different times, without looping over every user (which would be too gas-expensive).
The solution is the reward-per-token accumulator pattern.
Reward Per Token Idea
Track a single global accumulator: the total reward earned per staked token since the contract started. Each user stores a snapshot of this accumulator at their last interaction.
Their owed reward = stake amount times (current accumulator minus their snapshot).
State Variables
Set up the bookkeeping variables that drive the accounting.
uint256 public rewardRate; // reward tokens per second
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
uint256 public totalStaked;
mapping(address => uint256) public balances;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;Computing Reward Per Token
The accumulator grows by the reward emitted since the last update, divided by the total staked.
function rewardPerToken() public view returns (uint256) {
if (totalStaked == 0) return rewardPerTokenStored;
uint256 elapsed = block.timestamp - lastUpdateTime;
return rewardPerTokenStored + (elapsed * rewardRate * 1e18) / totalStaked;
}Calculating Earned Rewards
A user's earned amount is their balance times the difference between the current accumulator and their last paid snapshot, plus anything already credited.
function earned(address account) public view returns (uint256) {
uint256 diff = rewardPerToken() - userRewardPerTokenPaid[account];
return (balances[account] * diff) / 1e18 + rewards[account];
}The Update Modifier
Before any state-changing action, settle the user's pending rewards and refresh the global accumulator. A modifier keeps this consistent.
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = block.timestamp;
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}Staking Tokens
Staking pulls tokens from the user and increases their balance and the total. The modifier settles rewards first.
function stake(uint256 amount) external updateReward(msg.sender) {
require(amount > 0, 'zero amount');
totalStaked += amount;
balances[msg.sender] += amount;
stakingToken.transferFrom(msg.sender, address(this), amount);
}Withdrawing Stake
Withdrawal mirrors staking: settle rewards, decrease balances, then return the staked tokens.
function withdraw(uint256 amount) external updateReward(msg.sender) {
require(balances[msg.sender] >= amount, 'too much');
totalStaked -= amount;
balances[msg.sender] -= amount;
stakingToken.transfer(msg.sender, amount);
}Claiming Rewards
Claiming sends accrued reward tokens to the user and resets their pending balance to zero.
function getReward() external updateReward(msg.sender) {
uint256 reward = rewards[msg.sender];
if (reward > 0) {
rewards[msg.sender] = 0;
rewardsToken.transfer(msg.sender, reward);
}
}Risks to Watch
Yield farming carries risks: impermanent loss when staking LP tokens, reward token inflation, and contract exploits. Always ensure the contract holds enough reward tokens to cover emissions and audit the math carefully.
Quick Check
Test your understanding of staking rewards.
Recap
You learned the staking rewards pattern used across DeFi:
- A global reward-per-token accumulator
- Per-user snapshots for O(1) accounting
- An
updateRewardmodifier settling state before stake, withdraw, and claim
This pattern fairly distributes continuous rewards while keeping gas costs low.
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- Kursus
- 12
- Pelajaran
- 48
Pertanyaan yang Sering Diajukan
Apakah pelajaran “Yield Farming dan Imbalan Staking” gratis?
Ya — teks lengkap “Yield Farming dan Imbalan Staking” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus Blockchain Smart Contracts with Solidity, upgrade ke CoddyKit PRO. Kursus Blockchain Smart Contracts with Solidity mencakup 4 pelajaran total.
Apa yang akan aku pelajari di “Yield Farming dan Imbalan Staking”?
Pahami cara kontrak imbalan yield farming dan staking DeFi mendistribusikan token dari waktu ke waktu, termasuk pola akuntansi imbalan per token yang digunakan protokol besar. Kamu berlatih Blockchain Smart Contracts with Solidity dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.
Apakah aku perlu pengalaman untuk memulai Blockchain Smart Contracts with Solidity?
Tidak diperlukan pengalaman sebelumnya. Blockchain Smart Contracts with Solidity di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 4 dari 4.
Berapa lama pelajaran “Yield Farming dan Imbalan Staking” memakan waktu?
Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.
Bisakah aku menulis dan menjalankan kode dalam pelajaran Blockchain Smart Contracts with Solidity ini?
Ya. Setiap pelajaran Blockchain Smart Contracts with Solidity menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.
Semua pelajaran dalam kursus ini
- AMM dan Pool Likuiditas
- Protokol Peminjaman dan Peminjaman Dana
- Flash Loan dan Arbitrase
- Yield Farming dan Imbalan Staking