stake.md

GMX Staking and Governance Exercises

In this exercise, you'll implement a contract that interacts with GMX's staking and governance systems.

By completing this exercise, you'll learn how to:

• Stake GMX tokens to earn rewards
• Unstake GMX tokens
• Claim staking rewards
• Check your staked position
• Delegate your voting power for governance

The exercise starter code is provided in Stake.sol.

Task 1: Implement staking functionality

Implement the stake function.

function stake(uint256 gmxAmount) external {
    // Your implementation here
}

This function should:

1. Transfer GMX tokens from the caller to the contract
2. Approve the REWARD_TRACKER to spend these tokens
3. Stake the tokens through rewardRouter

Task 2: Implement unstaking functionality

Implement the unstake function.

function unstake(uint256 gmxAmount) external {
    // Your implementation here
}

This function should call rewardRouter to unstake the specified amount of GMX tokens.

Task 3: Implement rewards claiming

Implement the claimRewards function.

function claimRewards() external {
    // Your implementation here
}

This function should:

1. Approve the REWARD_TRACKER to spend the contract's GMX tokens
2. Call rewardRouter.handleRewards function with appropriate parameters to:
   • Claim GMX rewards and stake them
   • Stake multiplier points
   • Claim WETH rewards
   • (Optional) Choose whether to convert WETH to ETH

Task 4: Implement staked amount checking

Implement the getStakedAmount function:

function getStakedAmount() external view returns (uint256) {
    // Your implementation here
}

This function should query rewardTracker to get the amount of GMX tokens staked by the contract.

Task 5: Implement governance delegation

Implement the delegate function:

function delegate(address delegatee) external {
    // Your implementation here
}

This function should delegate the contract's governance voting power to the specified address.

Call gmxDao.delegate.

Test

forge test --fork-url $FORK_URL --fork-block-number $FORK_BLOCK_NUM --match-path test/Stake.test.sol -vvv