defi-protocols

name	defi-protocols
description	Master DeFi protocol development including AMMs, lending, yield, and oracles
sasmp_version	1.3.0
version	2.0.0
updated	2025-01
bonded_agent	04-defi-specialist
bond_type	PRIMARY_BOND
atomic	true
single_responsibility	defi_development
parameters	{"protocol_type":{"type":"string","required":true,"enum":["amm","lending","yield","oracle","flash_loan"]},"chain":{"type":"string","default":"ethereum"}}
retry_config	{"max_attempts":3,"backoff":"exponential","initial_delay_ms":1000}
logging	{"level":"info","include_timestamps":true,"track_usage":true}

DeFi Protocols Skill

Master DeFi protocol development including AMM mechanics, lending systems, yield optimization, and oracle integration.

Quick Start

# Invoke this skill for DeFi development
Skill("defi-protocols", protocol_type="amm", chain="ethereum")

Topics Covered

1. AMM (Automated Market Makers)

Build decentralized exchanges:

• Constant Product: x * y = k (Uniswap V2)
• Concentrated Liquidity: Tick-based (Uniswap V3)
• Stable Swaps: Curve invariant
• TWAP: Time-weighted average price

2. Lending Protocols

Create lending markets:

• Overcollateralized: Aave/Compound model
• Interest Rates: Utilization-based curves
• Liquidation: Health factor, incentives
• Isolated Markets: Risk segmentation

3. Yield Optimization

Maximize returns:

• Auto-compounding: Vault strategies
• Liquidity Mining: Reward distribution
• veTokens: Vote-escrowed governance
• Bribes: Gauge voting incentives

4. Oracle Integration

Secure price feeds:

• Chainlink: Decentralized oracles
• TWAP: Manipulation resistant
• Staleness Checks: Price freshness
• Fallbacks: Multi-oracle setups

Code Examples

AMM Swap Calculation

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

library SwapMath {
    uint256 constant FEE_NUMERATOR = 997;
    uint256 constant FEE_DENOMINATOR = 1000;

    /// @notice Calculate output amount for constant product AMM
    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256) {
        uint256 amountInWithFee = amountIn * FEE_NUMERATOR;
        uint256 numerator = amountInWithFee * reserveOut;
        uint256 denominator = reserveIn * FEE_DENOMINATOR + amountInWithFee;
        return numerator / denominator;
    }

    /// @notice Calculate price impact percentage (basis points)
    function getPriceImpact(
        uint256 amountIn,
        uint256 reserveIn
    ) internal pure returns (uint256) {
        return (amountIn * 10000) / (reserveIn + amountIn);
    }
}