defi-protocol-templates

Name: defi-protocol-templates
Author: wshobson

8.1kinstalls4.1kforks

How to install defi-protocol-templates?

wshobson/agents/defi-protocol-templates

$npx -y skills add wshobson/agents --skill defi-protocol-templates

Installs into the current project.

Summary

Implement DeFi protocols with production-ready templates for staking, AMMs, governance, and flash loans. Use when building decentralized finance applications or smart contract protocols.

Files · 1

View on GitHub

SKILL.md

1	# DeFi Protocol Templates
2
3	Production-ready templates for common DeFi protocols including staking, AMMs, governance, and flash loans.
4
5	## When to Use This Skill
6
7	- Building staking platforms with reward distribution
8	- Implementing AMM (Automated Market Maker) protocols
9	- Creating governance token systems
10	- Integrating flash loan functionality
11
12	## Staking Contract
13
14	```solidity
15	// SPDX-License-Identifier: MIT
16	pragma solidity ^0.8.0;
17
18	import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
19	import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
20	import "@openzeppelin/contracts/access/Ownable.sol";
21
22	contract StakingRewards is ReentrancyGuard, Ownable {
23	IERC20 public stakingToken;
24	IERC20 public rewardsToken;
25
26	uint256 public rewardRate = 100; // Rewards per second
27	uint256 public lastUpdateTime;
28	uint256 public rewardPerTokenStored;
29
30	mapping(address => uint256) public userRewardPerTokenPaid;
31	mapping(address => uint256) public rewards;
32	mapping(address => uint256) public balances;
33
34	uint256 private _totalSupply;
35
36	event Staked(address indexed user, uint256 amount);
37	event Withdrawn(address indexed user, uint256 amount);
38	event RewardPaid(address indexed user, uint256 reward);
39
40	constructor(address _stakingToken, address _rewardsToken) {
41	stakingToken = IERC20(_stakingToken);
42	rewardsToken = IERC20(_rewardsToken);
43	}
44
45	modifier updateReward(address account) {
46	rewardPerTokenStored = rewardPerToken();
47	lastUpdateTime = block.timestamp;
48
49	if (account != address(0)) {
50	rewards[account] = earned(account);
51	userRewardPerTokenPaid[account] = rewardPerTokenStored;
52	}
53	_;
54	}
55
56	function rewardPerToken() public view returns (uint256) {
57	if (_totalSupply == 0) {
58	return rewardPerTokenStored;
59	}
60	return rewardPerTokenStored +
61	((block.timestamp - lastUpdateTime) * rewardRate * 1e18) / _totalSupply;
62	}
63
64	function earned(address account) public view returns (uint256) {
65	return (balances[account] *
66	(rewardPerToken() - userRewardPerTokenPaid[account])) / 1e18 +
67	rewards[account];
68	}
69
70	function stake(uint256 amount) external nonReentrant updateReward(msg.sender) {
71	require(amount > 0, "Cannot stake 0");
72	_totalSupply += amount;
73	balances[msg.sender] += amount;
74	stakingToken.transferFrom(msg.sender, address(this), amount);
75	emit Staked(msg.sender, amount);
76	}
77
78	function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) {
79	require(amount > 0, "Cannot withdraw 0");
80	_totalSupply -= amount;
81	balances[msg.sender] -= amount;
82	stakingToken.transfer(msg.sender, amount);
83	emit Withdrawn(msg.sender, amount);
84	}
85
86	function getReward() public nonReentrant updateReward(msg.sender) {
87	uint256 reward = rewards[msg.sender];
88	if (reward > 0) {
89	rewards[msg.sender] = 0;
90	rewardsToken.transfer(msg.sender, reward);
91	emit RewardPaid(msg.sender, reward);
92	}
93	}
94
95	function exit() external {
96	withdraw(balances[msg.sender]);
97	getReward();
98	}
99	}
100	```
101
102	## AMM (Automated Market Maker)
103
104	```solidity
105	// SPDX-License-Identifier: MIT
106	pragma solidity ^0.8.0;
107
108	import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
109
110	contract SimpleAMM {
111	IERC20 public token0;
112	IERC20 public token1;
113
114	uint256 public reserve0;
115	uint256 public reserve1;
116
117	uint256 public totalSupply;
118	mapping(address => uint256) public balanceOf;
119
120	event Mint(address indexed to, uint256 amount);
121	event Burn(address indexed from, uint256 amount);
122	event Swap(address indexed trader, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out);
123
124	constructor(address _token0, address _token1) {
125	token0 = IERC20(_token0);
126	token1 = IERC20(_token1);
127	}
128
129	function addLiquidity(uint256 amount0, uint256 amount1) external returns (uint256 shares) {
130	token0.transferFrom(msg.sender, address(this), amount0);
131	token1.transferFrom(msg.sender, address(this), amount1);
132
133	if (totalSupply == 0) {
134	shares = sqrt(amount0 * amount1);
135	} else {
136	shares = min(
137	(amount0 * totalSupply) / reserve0,
138	(amount1 * totalSupply) / reserve1
139	);
140	}
141
142	require(shares > 0, "Shares = 0");
143	_mint(msg.sender, shares);
144	_update(
145	token0.balanceOf(address(this)),
146	token1.balanceOf(address(this))
147	);
148
149	emit Mint(msg.sender, shares);
150	}
151
152	function removeLiquidity(uint256 shares) external returns (uin

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defi-protocol-templates

8.1kinstalls4.1kforks

View on GitHub

How to install defi-protocol-templates?

wshobson/agents/defi-protocol-templates

$npx -y skills add wshobson/agents --skill defi-protocol-templates

Installs into the current project.

Summary

Implement DeFi protocols with production-ready templates for staking, AMMs, governance, and flash loans. Use when building decentralized finance applications or smart contract protocols.

Files · 1

View on GitHub

SKILL.md

1	# DeFi Protocol Templates
2
3	Production-ready templates for common DeFi protocols including staking, AMMs, governance, and flash loans.
4
5	## When to Use This Skill
6
7	- Building staking platforms with reward distribution
8	- Implementing AMM (Automated Market Maker) protocols
9	- Creating governance token systems
10	- Integrating flash loan functionality
11
12	## Staking Contract
13
14	```solidity
15	// SPDX-License-Identifier: MIT
16	pragma solidity ^0.8.0;
17
18	import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
19	import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
20	import "@openzeppelin/contracts/access/Ownable.sol";
21
22	contract StakingRewards is ReentrancyGuard, Ownable {
23	IERC20 public stakingToken;
24	IERC20 public rewardsToken;
25
26	uint256 public rewardRate = 100; // Rewards per second
27	uint256 public lastUpdateTime;
28	uint256 public rewardPerTokenStored;
29
30	mapping(address => uint256) public userRewardPerTokenPaid;
31	mapping(address => uint256) public rewards;
32	mapping(address => uint256) public balances;
33
34	uint256 private _totalSupply;
35
36	event Staked(address indexed user, uint256 amount);
37	event Withdrawn(address indexed user, uint256 amount);
38	event RewardPaid(address indexed user, uint256 reward);
39
40	constructor(address _stakingToken, address _rewardsToken) {
41	stakingToken = IERC20(_stakingToken);
42	rewardsToken = IERC20(_rewardsToken);
43	}
44
45	modifier updateReward(address account) {
46	rewardPerTokenStored = rewardPerToken();
47	lastUpdateTime = block.timestamp;
48
49	if (account != address(0)) {
50	rewards[account] = earned(account);
51	userRewardPerTokenPaid[account] = rewardPerTokenStored;
52	}
53	_;
54	}
55
56	function rewardPerToken() public view returns (uint256) {
57	if (_totalSupply == 0) {
58	return rewardPerTokenStored;
59	}
60	return rewardPerTokenStored +
61	((block.timestamp - lastUpdateTime) * rewardRate * 1e18) / _totalSupply;
62	}
63
64	function earned(address account) public view returns (uint256) {
65	return (balances[account] *
66	(rewardPerToken() - userRewardPerTokenPaid[account])) / 1e18 +
67	rewards[account];
68	}
69
70	function stake(uint256 amount) external nonReentrant updateReward(msg.sender) {
71	require(amount > 0, "Cannot stake 0");
72	_totalSupply += amount;
73	balances[msg.sender] += amount;
74	stakingToken.transferFrom(msg.sender, address(this), amount);
75	emit Staked(msg.sender, amount);
76	}
77
78	function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) {
79	require(amount > 0, "Cannot withdraw 0");
80	_totalSupply -= amount;
81	balances[msg.sender] -= amount;
82	stakingToken.transfer(msg.sender, amount);
83	emit Withdrawn(msg.sender, amount);
84	}
85
86	function getReward() public nonReentrant updateReward(msg.sender) {
87	uint256 reward = rewards[msg.sender];
88	if (reward > 0) {
89	rewards[msg.sender] = 0;
90	rewardsToken.transfer(msg.sender, reward);
91	emit RewardPaid(msg.sender, reward);
92	}
93	}
94
95	function exit() external {
96	withdraw(balances[msg.sender]);
97	getReward();
98	}
99	}
100	```
101
102	## AMM (Automated Market Maker)
103
104	```solidity
105	// SPDX-License-Identifier: MIT
106	pragma solidity ^0.8.0;
107
108	import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
109
110	contract SimpleAMM {
111	IERC20 public token0;
112	IERC20 public token1;
113
114	uint256 public reserve0;
115	uint256 public reserve1;
116
117	uint256 public totalSupply;
118	mapping(address => uint256) public balanceOf;
119
120	event Mint(address indexed to, uint256 amount);
121	event Burn(address indexed from, uint256 amount);
122	event Swap(address indexed trader, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out);
123
124	constructor(address _token0, address _token1) {
125	token0 = IERC20(_token0);
126	token1 = IERC20(_token1);
127	}
128
129	function addLiquidity(uint256 amount0, uint256 amount1) external returns (uint256 shares) {
130	token0.transferFrom(msg.sender, address(this), amount0);
131	token1.transferFrom(msg.sender, address(this), amount1);
132
133	if (totalSupply == 0) {
134	shares = sqrt(amount0 * amount1);
135	} else {
136	shares = min(
137	(amount0 * totalSupply) / reserve0,
138	(amount1 * totalSupply) / reserve1
139	);
140	}
141
142	require(shares > 0, "Shares = 0");
143	_mint(msg.sender, shares);
144	_update(
145	token0.balanceOf(address(this)),
146	token1.balanceOf(address(this))
147	);
148
149	emit Mint(msg.sender, shares);
150	}
151
152	function removeLiquidity(uint256 shares) external returns (uin

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