DEX Integration Test Scenario Builder

WHAT IT DOES

This tool builds comprehensive test scenarios for DEX integration testing by generating realistic function calls for all common DEX operations. It analyzes the specified router contract and token pairs to produce ready-to-use test scenarios covering swaps (ETH for tokens, tokens for ETH, token-to-token), liquidity management (add/remove liquidity, with and without ETH), and routing paths. Each scenario includes the function signature, parameter names, and realistic mock values derived from on-chain state—including amounts, deadlines, paths, and slippage parameters. Results are presented as structured test cases that can be directly integrated into test suites, CI/CD pipelines, or development environments. This is essential for developers building on Uniswap V2, V3, or similar DEXes, auditors testing integration correctness, and teams ensuring robust error handling across different DEX operations.

HOW TO USE

Connect your wallet (read-only, no transaction required) and select the target network. Enter the DEX name, router contract address, and the addresses of the two tokens you want to test with. Click "build test scenarios" and the tool will verify the router contract, fetch token metadata, and generate a suite of test scenarios. Results display a summary of the DEX and token configuration, a series of scenario cards showing each test case with its function signature and parameters, and a detailed table of all generated scenarios. Use the generated scenarios to populate your test harness, validate function signatures against your application's expectations, or simulate DEX interactions in a local test environment.

TECHNICAL MECHANISM

The generator uses ethers.js v5.7.2 to perform a multi-stage scenario building process. First, it calls eth_getCode to verify the router contract is deployed at the provided address. It then attempts to fetch token metadata—including decimals and symbols—via standard ERC20 view functions. Using a comprehensive mapping of common DEX interfaces, the tool generates scenarios for each supported operation: swapExactETHForTokens, swapTokensForExactETH, swapExactTokensForTokens, swapTokensForExactTokens, addLiquidity, addLiquidityETH, removeLiquidity, and removeLiquidityETH. For each scenario, the tool constructs realistic parameter values based on the token decimals and typical test values—for example, amountIn is set to 1e18 for 18-decimal tokens, and slippage parameters are calculated with a standard tolerance (e.g., 5%). The generated scenarios include full parameter lists with descriptions, making them immediately usable in integration test suites without additional configuration.

WHAT IT CANNOT SEE

This tool cannot execute actual swap transactions or simulate state changes that depend on external conditions such as slippage, price impact, or MEV without forking the chain. It cannot test scenario paths that require specific transaction ordering or front-running conditions, as these depend on real-time market conditions. The tool is limited by the RPC provider's rate limits and block range availability for historical log queries, which may affect token metadata lookup. It cannot validate integration against DEXes that are not verified or have custom router implementations that deviate from standard interfaces—the tool relies on common interface patterns. It cannot test scenarios that depend on cross-chain DEX state or off-chain order books. The generated scenarios are simplified representations and may not capture all possible edge cases, market conditions, or complex routing paths involving multiple pools.

PLEASE NOTE

This is a read‑only analytics tool—it never submits transactions or signs anything. It is designed for EVM‑compatible chains and works best with standard DEX router interfaces (Uniswap V2/V3, SushiSwap, PancakeSwap, etc.). The generated scenarios are for development and testing purposes only and should not be used in production environments. Always verify function signatures and parameter types against the actual router ABI before using in your test suite.