/**
* MEV Protection Module Tests
* Tests for MEV protection and analysis tools
* @author nich
* @github github.com/nirholas
* @license Apache-2.0
*/
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest"
import type { Address, Hash, Hex } from "viem"
// Mock fetch for Flashbots API calls
const mockFetch = vi.fn()
global.fetch = mockFetch
// Mock the clients module
vi.mock("@/evm/services/clients.js", () => ({
getPublicClient: vi.fn(() => mockPublicClient),
getWalletClient: vi.fn(() => mockWalletClient)
}))
// Mock viem
vi.mock("viem", async () => {
const actual = await vi.importActual("viem")
return {
...actual,
createPublicClient: vi.fn(() => mockPublicClient),
http: vi.fn()
}
})
// Mock public client
const mockPublicClient = {
getChainId: vi.fn().mockResolvedValue(1),
getBlock: vi.fn(),
getBlockNumber: vi.fn(),
getTransaction: vi.fn(),
getTransactionReceipt: vi.fn(),
estimateGas: vi.fn(),
getGasPrice: vi.fn(),
call: vi.fn(),
readContract: vi.fn(),
simulateContract: vi.fn()
}
// Mock wallet client
const mockWalletClient = {
account: { address: "0x1234567890123456789012345678901234567890" as Address },
sendTransaction: vi.fn(),
signTransaction: vi.fn()
}
describe("MEV Module", () => {
beforeEach(() => {
vi.clearAllMocks()
mockFetch.mockReset()
})
afterEach(() => {
vi.restoreAllMocks()
})
// Test data
const mockTxHash = "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef" as Hash
const mockAddress = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" as Address
describe("Flashbots RPC Endpoints", () => {
it("should have Flashbots RPC for Ethereum mainnet", () => {
const FLASHBOTS_RPC: Record<number, string> = {
1: "https://rpc.flashbots.net",
5: "https://rpc-goerli.flashbots.net",
11155111: "https://rpc-sepolia.flashbots.net"
}
expect(FLASHBOTS_RPC[1]).toBe("https://rpc.flashbots.net")
expect(FLASHBOTS_RPC[11155111]).toBe("https://rpc-sepolia.flashbots.net")
})
})
describe("MEV Protection via Private Transaction", () => {
it("should send transaction to Flashbots Protect RPC", async () => {
mockFetch.mockResolvedValueOnce({
ok: true,
json: () => Promise.resolve({
jsonrpc: "2.0",
id: 1,
result: mockTxHash
})
})
const response = await fetch("https://rpc.flashbots.net", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
jsonrpc: "2.0",
id: 1,
method: "eth_sendRawTransaction",
params: ["0x...signedTx"]
})
})
const result = await response.json()
expect(result.result).toBe(mockTxHash)
})
it("should handle Flashbots RPC errors", async () => {
mockFetch.mockResolvedValueOnce({
ok: false,
status: 500,
json: () => Promise.resolve({ error: "Internal server error" })
})
const response = await fetch("https://rpc.flashbots.net", {
method: "POST",
body: JSON.stringify({})
})
expect(response.ok).toBe(false)
})
})
describe("MEV Bundle Submission", () => {
it("should submit bundle to Flashbots", async () => {
const mockBundle = {
signedTransactions: ["0x...tx1", "0x...tx2"],
blockNumber: "0x1234567"
}
mockFetch.mockResolvedValueOnce({
ok: true,
json: () => Promise.resolve({
jsonrpc: "2.0",
id: 1,
result: {
bundleHash: "0xbundle123"
}
})
})
const response = await fetch("https://relay.flashbots.net", {
method: "POST",
headers: {
"Content-Type": "application/json",
"X-Flashbots-Signature": "signature"
},
body: JSON.stringify({
jsonrpc: "2.0",
id: 1,
method: "eth_sendBundle",
params: [mockBundle]
})
})
const result = await response.json()
expect(result.result.bundleHash).toBeDefined()
})
})
describe("Transaction Simulation", () => {
it("should simulate transaction for MEV analysis", async () => {
mockPublicClient.call.mockResolvedValue({ data: "0x" })
mockPublicClient.estimateGas.mockResolvedValue(BigInt(21000))
const gasEstimate = await mockPublicClient.estimateGas({
to: mockAddress,
value: BigInt("1000000000000000000")
})
expect(gasEstimate).toBe(BigInt(21000))
})
it("should detect potential sandwich attack risk", async () => {
// Simulate a large swap that could be sandwiched
const swapAmount = BigInt("10000000000000000000") // 10 ETH
// In production, this would analyze mempool and liquidity
const riskFactors = {
largeSwap: swapAmount > BigInt("1000000000000000000"),
lowLiquidity: false,
highSlippage: false
}
expect(riskFactors.largeSwap).toBe(true)
})
})
describe("MEV Bot Pattern Detection", () => {
it("should identify known MEV bot patterns", () => {
const MEV_BOT_PATTERNS = {
sandwichAttack: "Multiple transactions bracketing a user swap",
frontrun: "Transaction with same method ahead of user in block",
backrun: "Transaction immediately following user transaction",
jitLiquidity: "Just-in-time liquidity provision/removal"
}
expect(MEV_BOT_PATTERNS.sandwichAttack).toContain("swap")
expect(Object.keys(MEV_BOT_PATTERNS)).toHaveLength(4)
})
it("should detect swap function selectors", () => {
const SWAP_SELECTORS: Record<string, string> = {
"0x38ed1739": "swapExactTokensForTokens",
"0x7ff36ab5": "swapExactETHForTokens",
"0x18cbafe5": "swapExactTokensForETH"
}
expect(SWAP_SELECTORS["0x38ed1739"]).toBe("swapExactTokensForTokens")
})
})
describe("Private Transaction Status", () => {
it("should check private transaction status", async () => {
mockFetch.mockResolvedValueOnce({
ok: true,
json: () => Promise.resolve({
status: "PENDING",
hash: mockTxHash,
maxBlockNumber: 18000000
})
})
const response = await fetch(`https://protect.flashbots.net/tx/${mockTxHash}`)
const status = await response.json()
expect(status.status).toBe("PENDING")
expect(status.hash).toBe(mockTxHash)
})
it("should handle transaction included status", async () => {
mockFetch.mockResolvedValueOnce({
ok: true,
json: () => Promise.resolve({
status: "INCLUDED",
hash: mockTxHash,
blockNumber: 18000001
})
})
const response = await fetch(`https://protect.flashbots.net/tx/${mockTxHash}`)
const status = await response.json()
expect(status.status).toBe("INCLUDED")
})
it("should handle transaction failed/cancelled status", async () => {
mockFetch.mockResolvedValueOnce({
ok: true,
json: () => Promise.resolve({
status: "FAILED",
reason: "Bundle not included within target blocks"
})
})
const response = await fetch(`https://protect.flashbots.net/tx/${mockTxHash}`)
const status = await response.json()
expect(status.status).toBe("FAILED")
})
})
describe("Edge Cases", () => {
it("should handle network timeout", async () => {
mockFetch.mockRejectedValue(new Error("Network timeout"))
await expect(
fetch("https://rpc.flashbots.net")
).rejects.toThrow("Network timeout")
})
it("should handle unsupported networks", () => {
const FLASHBOTS_RPC: Record<number, string> = {
1: "https://rpc.flashbots.net"
}
// BSC doesn't have Flashbots
expect(FLASHBOTS_RPC[56]).toBeUndefined()
})
it("should handle empty bundle submission", async () => {
mockFetch.mockResolvedValueOnce({
ok: false,
json: () => Promise.resolve({
error: { code: -32000, message: "Bundle must contain at least one transaction" }
})
})
const response = await fetch("https://relay.flashbots.net", {
method: "POST",
body: JSON.stringify({
method: "eth_sendBundle",
params: [{ signedTransactions: [] }]
})
})
const result = await response.json()
expect(result.error).toBeDefined()
})
})
})
