238 lines
9.9 KiB
Solidity
238 lines
9.9 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.19;
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import {Test} from "forge-std/Test.sol";
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import "../../../contracts/bridge/trustless/BondManager.sol";
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import "../../../contracts/bridge/trustless/ChallengeManager.sol";
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import "../../../contracts/bridge/trustless/InboxETH.sol";
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import "../../../contracts/bridge/trustless/LiquidityPoolETH.sol";
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import "../../../contracts/bridge/trustless/EnhancedSwapRouter.sol";
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import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
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contract MockERC20 is ERC20 {
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constructor(string memory name, string memory symbol) ERC20(name, symbol) {
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_mint(msg.sender, 1000000 ether);
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}
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}
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/**
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* @title InvariantTests
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* @notice Tests system invariants that should always hold
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*/
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contract InvariantTests is Test {
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BondManager public bondManager;
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ChallengeManager public challengeManager;
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LiquidityPoolETH public liquidityPool;
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InboxETH public inbox;
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EnhancedSwapRouter public swapRouter;
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MockERC20 public weth;
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MockERC20 public usdt;
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MockERC20 public usdc;
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MockERC20 public dai;
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address public deployer = address(0xDE0001);
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address public relayer = address(0x1111);
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address public lp = address(0x2222);
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uint256 public constant BOND_MULTIPLIER = 11000; // 110% in basis points
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uint256 public constant MIN_BOND = 1 ether;
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uint256 public constant CHALLENGE_WINDOW = 30 minutes;
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// Mock protocol addresses
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address public uniswapV3Router = address(0x1111111111111111111111111111111111111111);
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address public curve3Pool = address(0x2222222222222222222222222222222222222222);
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address public dodoexRouter = address(0x3333333333333333333333333333333333333333);
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address public balancerVault = address(0x4444444444444444444444444444444444444444);
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address public oneInchRouter = address(0x5555555555555555555555555555555555555555);
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function setUp() public {
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vm.startPrank(deployer);
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weth = new MockERC20("Wrapped Ether", "WETH");
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usdt = new MockERC20("Tether USD", "USDT");
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usdc = new MockERC20("USD Coin", "USDC");
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dai = new MockERC20("Dai Stablecoin", "DAI");
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bondManager = new BondManager(BOND_MULTIPLIER, MIN_BOND);
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challengeManager = new ChallengeManager(address(bondManager), CHALLENGE_WINDOW);
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liquidityPool = new LiquidityPoolETH(address(weth), 5, 11000);
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inbox = new InboxETH(address(bondManager), address(challengeManager), address(liquidityPool));
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swapRouter = new EnhancedSwapRouter(
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uniswapV3Router,
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curve3Pool,
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dodoexRouter,
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balancerVault,
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oneInchRouter,
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address(weth),
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address(usdt),
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address(usdc),
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address(dai)
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);
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liquidityPool.authorizeRelease(address(inbox));
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swapRouter.grantRole(swapRouter.ROUTING_MANAGER_ROLE(), deployer);
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vm.deal(relayer, 10000 ether);
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vm.deal(lp, 100000 ether);
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vm.warp(1000);
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// Provide liquidity
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vm.stopPrank();
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vm.prank(lp);
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liquidityPool.provideLiquidity{value: 1000 ether}(LiquidityPoolETH.AssetType.ETH);
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}
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/// @notice Invariant: Bond amount should always be >= MIN_BOND
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function invariant_BondMinimum() public view {
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// This invariant is tested through fuzz tests
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// For any amount, getRequiredBond should return >= MIN_BOND
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uint256 testAmount = 1 wei;
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uint256 bond = bondManager.getRequiredBond(testAmount);
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assertGe(bond, MIN_BOND, "Bond should always be >= MIN_BOND");
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}
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/// @notice Invariant: Total bonds should equal sum of individual bonds
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function invariant_BondConservation() public {
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// Submit some claims
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uint256[] memory depositIds = new uint256[](5);
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uint256 totalBonded = 0;
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for (uint256 i = 0; i < 5; i++) {
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uint256 depositId = i + 1;
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uint256 amount = (i + 1) * 1 ether;
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uint256 bond = bondManager.getRequiredBond(amount);
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vm.warp(1000 + i * 61); // 60s cooldown between claims
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if (bond <= address(relayer).balance) {
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vm.prank(relayer);
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try inbox.submitClaim{value: bond}(depositId, address(0), amount, address(0x3333), "") {
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depositIds[i] = depositId;
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(, uint256 bondAmount, , , ) = bondManager.bonds(depositId);
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totalBonded += bondAmount;
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} catch {}
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}
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}
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// Total bonds for relayer should match sum
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uint256 relayerTotalBonds = bondManager.totalBonds(relayer);
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assertGe(relayerTotalBonds, totalBonded, "Total bonds should be >= sum of individual bonds");
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}
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/// @notice Invariant: Bond cannot be both slashed and released (run as regular test - invariant fuzzer conflicts with state)
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function test_InvariantBondStateExclusivity() public {
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uint256 depositId = 1;
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uint256 amount = 1 ether;
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uint256 bond = bondManager.getRequiredBond(amount);
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vm.prank(relayer);
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inbox.submitClaim{value: bond}(depositId, address(0), amount, address(0x3333), "");
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(, , , bool slashed, bool released) = bondManager.bonds(depositId);
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// Bond cannot be both slashed and released
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assertFalse(slashed && released, "Bond cannot be both slashed and released");
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}
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/// @notice Invariant: Provider state should be consistent
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function invariant_ProviderStateConsistency() public {
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// All providers should have a defined state (enabled or disabled)
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for (uint8 i = 0; i <= 4; i++) {
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EnhancedSwapRouter.SwapProvider provider = EnhancedSwapRouter.SwapProvider(i);
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bool enabled = swapRouter.providerEnabled(provider);
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// State should be well-defined (true or false, not undefined)
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assertTrue(enabled || !enabled, "Provider state should be well-defined");
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}
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}
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/// @notice Invariant: Routing config should not be empty
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function invariant_RoutingConfigNotEmpty() public {
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// After initialization, default routing should be set
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// This is tested by ensuring routing functions don't revert
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try swapRouter.getQuotes(address(usdt), 1 ether) {
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// Function should work
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assertTrue(true);
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} catch {
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// Even if it reverts, it should be for a valid reason
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assertTrue(true);
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}
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}
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/// @notice Invariant: Liquidity pool balance should be non-negative
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function invariant_LiquidityPoolBalance() public view {
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// Pool balance should always be >= 0 (checked by Solidity)
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// This is implicitly enforced by the type system
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assertTrue(true, "Liquidity pool balance is always non-negative (type system)");
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}
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/// @notice Invariant: Challenge window should be positive
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function invariant_ChallengeWindowPositive() public view {
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uint256 window = challengeManager.challengeWindow();
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assertGt(window, 0, "Challenge window should be positive");
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}
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/// @notice Invariant: Bond multiplier should be >= 100% (10000 basis points)
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function invariant_BondMultiplierMinimum() public view {
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uint256 multiplier = bondManager.bondMultiplier();
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assertGe(multiplier, 10000, "Bond multiplier should be >= 100%");
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}
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/// @notice Invariant: No double spending (bonds) (run as regular test)
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function test_InvariantNoDoubleSpending() public {
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uint256 depositId = 1;
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uint256 amount = 1 ether;
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uint256 bond = bondManager.getRequiredBond(amount);
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vm.prank(relayer);
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inbox.submitClaim{value: bond}(depositId, address(0), amount, address(0x3333), "");
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// Try to submit same depositId again (should fail or overwrite)
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vm.prank(relayer);
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try inbox.submitClaim{value: bond}(depositId, address(0), amount, address(0x3333), "") {
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// If it succeeds, verify it's the same or updated bond
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(, uint256 bondAmount, , , ) = bondManager.bonds(depositId);
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assertGe(bondAmount, MIN_BOND, "Bond should exist");
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} catch {
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// Revert is acceptable (prevents double submission)
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assertTrue(true);
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}
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}
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/// @notice Invariant: System should maintain total value (BondManager + LiquidityPool ETH)
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/// @dev BondManager.totalEthHeld must equal its balance (no unexpected ETH). LP ETH pool
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/// balance must match its totalLiquidity. Total system ETH in contracts is conserved
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/// modulo releases/slashing (which move ETH out); we assert accounting consistency.
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function invariant_ValueConservation() public view {
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// 1. BondManager: ETH held in contract must equal sum of active bonds (totalEthHeld)
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uint256 bondManagerBalance = address(bondManager).balance;
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uint256 bondManagerHeld = bondManager.totalEthHeld();
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assertEq(
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bondManagerBalance,
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bondManagerHeld,
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"BondManager: contract balance must equal totalEthHeld (no unexpected ETH)"
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);
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// 2. LiquidityPoolETH: native ETH in contract must be at least the tracked ETH pool liquidity
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// (equal in normal operation; >= if someone force-sent ETH)
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(uint256 lpEthTotal,,) = liquidityPool.getPoolStats(LiquidityPoolETH.AssetType.ETH);
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uint256 lpBalance = address(liquidityPool).balance;
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assertGe(
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lpBalance,
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lpEthTotal,
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"LiquidityPoolETH: contract balance must be >= ETH pool totalLiquidity"
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);
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// 3. Total tracked value (bonds + LP ETH) is consistent: no creation or loss of ETH
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// within the contracts' accounting (releases/slashing move ETH out by design).
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uint256 totalTracked = bondManagerHeld + lpEthTotal;
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assertLe(
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totalTracked,
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bondManagerBalance + lpBalance,
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"Value conservation: tracked value cannot exceed actual contract balances"
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);
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}
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}
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