tests added for buyback logic based on the real signatures

Signed-off-by: Uncle Fatso <uncle.fatso@ghostchain.io>

test/gatekeeper/Gatekeeper.t.sol

@@ -3,34 +3,76 @@ pragma solidity 0.8.20;
 import {Test} from "forge-std/Test.sol";
 
 import {Gatekeeper} from "../../src/Gatekeeper.sol";
+import {FullMath} from "../../src/libraries/FullMath.sol";
+import {RequestPacking} from "../../src/libraries/Packing.sol";
+import {IStorageHistory} from "../../src/interfaces/IStorageHistory.sol";
+
+contract MockStaking is Test {
+    Gatekeeper public gatekeeper;
+
+    mapping(address => uint256) private _materializedAmounts;
+
+    constructor(uint256 existential) {
+        gatekeeper = new Gatekeeper(existential, address(0));
+    }
+
+    function runGhost(bytes32 receiver, uint256 amount) external {
+        gatekeeper.ghost(receiver, amount);
+    }
+
+    function runMaterialize(
+        uint256 exodusSession,
+        uint256 amount,
+        uint256 packed,
+        address caller
+    ) external payable {
+        if (msg.value > 0) {
+            vm.deal(address(gatekeeper), address(gatekeeper).balance + msg.value);
+        }
+
+        vm.prank(address(gatekeeper), caller);
+        gatekeeper.materialize{value: msg.value}(exodusSession, amount, packed);
+    }
+
+    function materialize(address receiver, uint256 amount) external {
+        _materializedAmounts[receiver] += amount;
+    }
+
+    function materializedAmount(address who) external view returns (uint256) {
+        return _materializedAmounts[who];
+    }
+
+    function totalReserves() external pure returns (uint256) {
+        return type(uint256).max;
+    }
+
+    function baseSupply() external pure returns (uint256) {
+        return type(uint256).max;
+    }
+}
 
 contract GatekeeperTest is Test {
+    using RequestPacking for RequestPacking.RequestPayload;
+
     address constant ALICE       = 0x0000000000000000000000000000000000000001;
     address constant BOB         = 0x0000000000000000000000000000000000000002;
     uint256 constant EXISTENTIAL = 1337;
     uint256 constant INIT_AMOUNT = 69 * 1e18;
+
     Gatekeeper gatekeeper;
+    MockStaking staking;
 
     event Ghosted(bytes32 indexed receiver, uint256 indexed amount);
 
     function setUp() public {
         vm.prank(ALICE, ALICE);
-        gatekeeper = new Gatekeeper(EXISTENTIAL, address(0));
+        staking = new MockStaking(EXISTENTIAL);
+        gatekeeper = staking.gatekeeper();
     }
 
-    function test_correctInitialization() public {
+    function test_correctInitialization() public view {
-        assertEq(gatekeeper.staking(), ALICE);
+        assertEq(gatekeeper.staking(), address(staking));
         assertEq(gatekeeper.ghostedSupply(), 0);
-
-        bytes32 receiver = bytes32(abi.encodePacked(ALICE));
-        vm.prank(ALICE);
-        gatekeeper.ghost(receiver, INIT_AMOUNT);
-
-        vm.prank(BOB);
-        Gatekeeper anotherGatekeeper = new Gatekeeper(EXISTENTIAL, address(gatekeeper));
-        assertEq(anotherGatekeeper.staking(), ALICE);
-        assertEq(anotherGatekeeper.ghostedSupply(), INIT_AMOUNT);
-        assertEq(anotherGatekeeper.existentialDeposit(), EXISTENTIAL);
     }
 
     function test_ghostTokensWork(uint256 ghostAmount) public {
@@ -39,7 +81,7 @@ contract GatekeeperTest is Test {
         uint256 ghostedSupply = gatekeeper.ghostedSupply();
 
         vm.prank(ALICE);
-        gatekeeper.ghost(receiver, ghostAmount);
+        staking.runGhost(receiver, ghostAmount);
         assertEq(gatekeeper.ghostedSupply(), ghostedSupply + ghostAmount);
     }
 
@@ -49,7 +91,7 @@ contract GatekeeperTest is Test {
 
         vm.expectRevert();
         vm.prank(someone);
-        gatekeeper.ghost(receiver, 69);
+        staking.runGhost(receiver, 69);
         assertEq(gatekeeper.ghostedSupply(), 0);
     }
 
@@ -60,14 +102,40 @@ contract GatekeeperTest is Test {
         vm.expectEmit(true, true, true, false, address(gatekeeper));
         emit Ghosted(receiver, ghostAmount);
         vm.prank(ALICE);
-        gatekeeper.ghost(receiver, ghostAmount);
+        staking.runGhost(receiver, ghostAmount);
     }
 
-    // TODO: revisit with actual signatures from the cargo test
+    function test_materializeWork(uint256 exodusSession, uint256 bobAmount, uint32 bobCommission) public {
-    // function test_materializeWork(uint256 ghostAmount) public {
+        vm.assume(bobAmount > 1337 && bobAmount < 1_000 ether);
-    //     vm.prank(ALICE);
+        vm.assume(bobCommission > 0 && bobCommission <= type(uint32).max);
-    //     gatekeeper.materialize(0, ghostAmount, 0, ALICE);
+
-    // }
+        address storageHistory = gatekeeper.storageHistory();
+        uint256 commissionAmount = FullMath.mulDiv(bobAmount, uint256(bobCommission), type(uint32).max);
+        uint256 bobPacked = RequestPacking.pack(uint32(bobCommission), uint64(block.chainid), BOB);
+
+        vm.prank(ALICE);
+        staking.runGhost(bytes32(abi.encodePacked(ALICE)), bobAmount);
+
+        uint256 nativeNeeded = FullMath.mulDiv(commissionAmount, staking.totalReserves(), staking.baseSupply());
+
+        vm.deal(ALICE, nativeNeeded + 1 ether);
+        assertEq(BOB.balance, 0 ether);
+        uint256 aliceStartingNative = ALICE.balance;
+
+        uint256 previousAliceAmount = staking.materializedAmount(ALICE);
+        uint256 previousBobAmount = staking.materializedAmount(BOB);
+
+        vm.prank(ALICE);
+        staking.runMaterialize{value: nativeNeeded}(exodusSession, bobAmount, bobPacked, ALICE);
+
+        assertApproxEqAbs(previousAliceAmount + commissionAmount, staking.materializedAmount(ALICE), 1000);
+        assertApproxEqAbs(previousBobAmount + (bobAmount - commissionAmount), staking.materializedAmount(BOB), 1000);
+
+        assertEq(BOB.balance, nativeNeeded);
+        assertEq(ALICE.balance, aliceStartingNative - nativeNeeded);
+
+        assert(IStorageHistory(storageHistory).isTransactionExecuted(exodusSession));
+    }
 
     function test_rotateWork(bytes32 aggregatedPublicKey) public {
         vm.warp(block.timestamp + 1);
@@ -81,18 +149,24 @@ contract GatekeeperTest is Test {
 
         vm.expectRevert();
         vm.prank(ALICE);
-        gatekeeper.ghost(receiver, amount);
+        staking.runGhost(receiver, amount);
 
         assertEq(gatekeeper.ghostedSupply(), 0);
     }
 
     function test_signatureVerificationsWorks() public {
         assertEq(gatekeeper.deployer(), ALICE);
+
+        vm.prank(ALICE);
+        staking.runGhost(bytes32(abi.encodePacked(ALICE)), type(uint104).max);
+
         vm.prank(ALICE);
         gatekeeper.updatePublicKeyMetadata(0, 0x875cdcba4ae5494518fa2602791e667ca0998402b6a69e5b7cb4c72dba4e4669, 0);
 
-        (bytes32 prevPublicKey, uint8 prevParity, uint64 prevSession) = gatekeeper.latestPublicKeyInfo();
+        (bytes32 prevPublicKey, uint8 prevParity,) = gatekeeper.latestPublicKeyInfo();
 
+        // genesis validators 4 validators, DKG #0
+        // exodus session #0
         gatekeeper.verify(
             hex"49f03a670000000000000000000000000000000000000000000000000000000000000000875cdcba4ae5494518fa2602791e667ca0998402b6a69e5b7cb4c72dba4e46690000000000000000000000000000000000000000000000000000000000000000",
             hex"044d9fa18df9da04381ed256981570a6ef6a0893496ded966fc994662df931ed423b29e2737394b31d8498594caad7b77e36ab31ac79df3796a1b6f26baa5552ae",
@@ -102,41 +176,46 @@ contract GatekeeperTest is Test {
         (bytes32 publicKey, uint8 parity, uint64 session) = gatekeeper.latestPublicKeyInfo();
         assertEq(publicKey, prevPublicKey);
         assertEq(parity, prevParity);
-        assertEq(session, prevSession);
+        assertEq(session, 0);
 
+        // could not apply signature from DKG #2
         vm.expectRevert();
         gatekeeper.verify(
-            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000023492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
+            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000043492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
-            hex"042b45a8909a137e7bab5caf4b2870ece0469c6a4149c10074cfdaf2c114a65daefe14179830c95d07fea439ce78d2ad11898578e5e678dbcb98a7576da9e57c77",
+            hex"0496bacdcc4260a610c9ef465cc1d9f973dda7d4794a65c1d1ea8ea2bb8aa3ddb08d171f5aa267c1ddc64343b4f054424af0c61b57e1f359cd4e23876a0fa4a704",
-            0x5a61b59cededac4010b89bc6935e0cb7d975f5e2db457227ee473203de5247ed
+            0x34383aacbe014a6fed8b5976ccfcdcbb93cef7e41a6634f934432d9ede912c14
         );
 
+        // genesis validators 7 validators, DKG #1
+        // exodus session #2
         gatekeeper.verify(
-            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000014e8c1fe96d6737cdabbcc96501d6656b9d0b659b3a528ef507f2d52bef29e1570000000000000000000000000000000000000000000000000000000000000000",
+            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000024e8c1fe96d6737cdabbcc96501d6656b9d0b659b3a528ef507f2d52bef29e1570000000000000000000000000000000000000000000000000000000000000000",
-            hex"04d4c4daeb68bf8e40db4b516ddf3be9dd0f56a81809945e30bf06b7e5b26d1b27c83367de842f00c915f06ab1755dc511a3a3fe213308b5e65c6832d9d9bb3b38",
+            hex"04460e7dce1ebd4cc7527ba80852b6fcdbf8810da3b2173c2f3b3da63206a44407f79d5b5b4c3adcdcce2404c7488240873babb856f065fa551caa6dddea68ca06",
-            0xd93d1b1613277ddb27df66bdea16d7b91adf975eb150e27a872ce035655ec13d
+            0x7f6ac70e1e3f3ddd7101a439e7da6f8622a0c8cc38ce42ce81d911d8ad23af90
         );
 
         (publicKey, parity, session) = gatekeeper.latestPublicKeyInfo();
         assert(publicKey != prevPublicKey);
         assertEq(parity, prevParity);
-        assertEq(session, prevSession + 1);
+        assertEq(session, 2);
 
         prevPublicKey = publicKey;
         prevParity = parity;
-        prevSession = session;
 
+        // genesis validators 5 validators, DKG #2
+        // exodus session #4
         gatekeeper.verify(
-            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000023492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
+            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000043492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
-            hex"042b45a8909a137e7bab5caf4b2870ece0469c6a4149c10074cfdaf2c114a65daefe14179830c95d07fea439ce78d2ad11898578e5e678dbcb98a7576da9e57c77",
+            hex"0496bacdcc4260a610c9ef465cc1d9f973dda7d4794a65c1d1ea8ea2bb8aa3ddb08d171f5aa267c1ddc64343b4f054424af0c61b57e1f359cd4e23876a0fa4a704",
-            0x5a61b59cededac4010b89bc6935e0cb7d975f5e2db457227ee473203de5247ed
+            0x34383aacbe014a6fed8b5976ccfcdcbb93cef7e41a6634f934432d9ede912c14
         );
 
         (publicKey, parity, session) = gatekeeper.latestPublicKeyInfo();
         assert(publicKey != prevPublicKey);
         assertEq(parity, prevParity);
-        assertEq(session, prevSession + 1);
+        assertEq(session, 4);
 
+        // could not apply DKG #0 no more
         vm.expectRevert();
         gatekeeper.verify(
             hex"49f03a670000000000000000000000000000000000000000000000000000000000000000875cdcba4ae5494518fa2602791e667ca0998402b6a69e5b7cb4c72dba4e46690000000000000000000000000000000000000000000000000000000000000000",
@@ -144,18 +223,63 @@ contract GatekeeperTest is Test {
             0x24029a571fcaeadd14f4afe8be62afe3d07876ae270c3caf446ecb6cfc7c08f2
         );
 
+        // could not apply DKG #1 no more
         vm.expectRevert();
         gatekeeper.verify(
-            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000014e8c1fe96d6737cdabbcc96501d6656b9d0b659b3a528ef507f2d52bef29e1570000000000000000000000000000000000000000000000000000000000000000",
+            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000024e8c1fe96d6737cdabbcc96501d6656b9d0b659b3a528ef507f2d52bef29e1570000000000000000000000000000000000000000000000000000000000000000",
-            hex"04d4c4daeb68bf8e40db4b516ddf3be9dd0f56a81809945e30bf06b7e5b26d1b27c83367de842f00c915f06ab1755dc511a3a3fe213308b5e65c6832d9d9bb3b38",
+            hex"04460e7dce1ebd4cc7527ba80852b6fcdbf8810da3b2173c2f3b3da63206a44407f79d5b5b4c3adcdcce2404c7488240873babb856f065fa551caa6dddea68ca06",
-            0xd93d1b1613277ddb27df66bdea16d7b91adf975eb150e27a872ce035655ec13d
+            0x7f6ac70e1e3f3ddd7101a439e7da6f8622a0c8cc38ce42ce81d911d8ad23af90
         );
 
+        // could not apply DKG #2 no more
         vm.expectRevert();
         gatekeeper.verify(
-            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000023492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
+            hex"49f03a6700000000000000000000000000000000000000000000000000000000000000043492bc8bb10848f1f788496ccadde7d458eac4ac2c1eca2dd2c7a506d8fa2c5b0000000000000000000000000000000000000000000000000000000000000000",
-            hex"042b45a8909a137e7bab5caf4b2870ece0469c6a4149c10074cfdaf2c114a65daefe14179830c95d07fea439ce78d2ad11898578e5e678dbcb98a7576da9e57c77",
+            hex"0496bacdcc4260a610c9ef465cc1d9f973dda7d4794a65c1d1ea8ea2bb8aa3ddb08d171f5aa267c1ddc64343b4f054424af0c61b57e1f359cd4e23876a0fa4a704",
-            0x5a61b59cededac4010b89bc6935e0cb7d975f5e2db457227ee473203de5247ed
+            0x34383aacbe014a6fed8b5976ccfcdcbb93cef7e41a6634f934432d9ede912c14
         );
+
+        uint256 aliceAmountBefore = staking.materializedAmount(ALICE);
+        uint256 bobAmountBefore = staking.materializedAmount(BOB);
+        uint256 aliceBalanceBefore = ALICE.balance;
+        uint256 bobBalanceBefore = BOB.balance;
+
+        // execute bridge out, happened on DKG #0
+        // amount: 69; commission: 0%; ALICE
+        // exodus session #1
+        gatekeeper.verify(
+            hex"39cd99050000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000004500000000000000000000000000000000000000010000000000007a6900000000",
+            hex"04bf0bcb3d42d8187c543a82ee201a221525047020ff0ac03e4d60e322d3eb6d8ab5bfdae43ea0fbf59128d201b8076727c3c63fe8a5c2b890fdb3c97a7da5f207",
+            0x08f121a1615782c83cce41d7fc2064be57fdeeae8b45f716211b3c8c873f3e4c
+        );
+
+        assertEq(aliceAmountBefore + 69, staking.materializedAmount(ALICE));
+        assertEq(bobAmountBefore, staking.materializedAmount(BOB));
+        assertEq(aliceBalanceBefore, ALICE.balance);
+        assertEq(bobBalanceBefore, BOB.balance);
+
+        vm.deal(ALICE, 220);
+
+        aliceAmountBefore = staking.materializedAmount(ALICE);
+        bobAmountBefore = staking.materializedAmount(BOB);
+        aliceBalanceBefore = ALICE.balance;
+        bobBalanceBefore = BOB.balance;
+
+        uint256 buyback = 220;
+
+        // execute bridge out, happened on DKG #1
+        // amount: 420; commission: 50%; BOB
+        // exodus session #3
+        vm.prank(ALICE, ALICE);
+        gatekeeper.verify{value: buyback}(
+            hex"39cd9905000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000000000001a400000000000000000000000000000000000000020000000000007a6980000000",
+            hex"04089940ed9bb8d7f3a77adfafb0d5ebc45af558ade46844856c049aa912b9d8401826e17f24c0aa625524ff4a65b430a19422b4f9754cec3b862641f17f99b1a9",
+            0x9d2cf40ab0b1820858fe6f8950e2f511b4acb57b00b37bb93760978e2add4243
+        );
+
+        assertEq(aliceAmountBefore + 210, staking.materializedAmount(ALICE));
+        assertEq(bobAmountBefore + 210, staking.materializedAmount(BOB));
+        assertEq(aliceBalanceBefore - buyback, ALICE.balance);
+        assertEq(bobBalanceBefore + buyback, BOB.balance);
     }
 }

test/gatekeeper/GatekeeperHistory.t.sol

@@ -4,19 +4,56 @@ import {Test} from "forge-std/Test.sol";
 
 import {Gatekeeper} from "../../src/Gatekeeper.sol";
 import {IStorageHistory} from "../../src/interfaces/IStorageHistory.sol";
+import {RequestPacking} from "../../src/libraries/Packing.sol";
+
+contract MockStaking is Test {
+    Gatekeeper public gatekeeper;
+
+    mapping(address => uint256) private _materializedAmounts;
+
+    constructor(uint256 existential) {
+        gatekeeper = new Gatekeeper(existential, address(0));
+    }
+
+    function redoGatekeeper(uint256 existential) external {
+        gatekeeper = new Gatekeeper(existential, address(gatekeeper));
+    }
+
+    function runGhost(bytes32 receiver, uint256 amount) external {
+        gatekeeper.ghost(receiver, amount);
+    }
+
+    function runMaterialize(uint256 exodusSession, uint256 amount, uint256 packed) external {
+        vm.prank(address(gatekeeper));
+        gatekeeper.materialize(exodusSession, amount, packed);
+    }
+
+    function materialize(address receiver, uint256 amount) external {
+        _materializedAmounts[receiver] += amount;
+    }
+
+    function materializedAmount(address who) external view returns (uint256) {
+        return _materializedAmounts[who];
+    }
+}
 
 contract GatekeeperStorageHistoryTest is Test {
+    using RequestPacking for RequestPacking.RequestPayload;
+
     address constant ALICE        = 0x0000000000000000000000000000000000000001;
     address constant BOB          = 0x0000000000000000000000000000000000000002;
-    uint256 constant INIT_AMOUNT  = 69 * 1e18;
+    uint256 constant INIT_AMOUNT  = 1337 * 1e18;
-    uint256 constant INIT_GHOSTED = type(uint104).max / 2;
     uint256 constant EXISTENTIAL  = 0;
 
     Gatekeeper gatekeeper;
+    MockStaking staking;
 
     function setUp() public {
         vm.prank(ALICE);
-        gatekeeper = new Gatekeeper(EXISTENTIAL, address(0));
+        staking = new MockStaking(EXISTENTIAL);
+
+        staking.runGhost(bytes32(abi.encodePacked(ALICE)), INIT_AMOUNT);
+        gatekeeper = staking.gatekeeper();
     }
 
     function test_correctStorageHistoryInitialization() public view {
@@ -24,13 +61,16 @@ contract GatekeeperStorageHistoryTest is Test {
         IStorageHistory.DeploymentSnapshot memory snapshot = IStorageHistory(storageHistory).deploymentSnapshot();
 
         assertEq(snapshot.deployedAt, 0);
-        assertEq(snapshot.amountIn, 0);
+        assertEq(snapshot.amountIn, INIT_AMOUNT);
         assertEq(snapshot.amountOut, 0);
-        assertEq(gatekeeper.ghostedSupply(), 0);
+        assertEq(gatekeeper.ghostedSupply(), INIT_AMOUNT);
     }
 
-    function test_historicalAmountsOnlyIncrease(uint256 ghostAmount) public {
+    function test_historicalAmountsOnlyIncrease(uint256 ghostAmount, uint64 exodusSession) public {
-        vm.assume(ghostAmount > 0 && ghostAmount < INIT_GHOSTED / 2);
+        vm.assume(ghostAmount > 0 && ghostAmount < INIT_AMOUNT);
+
+        uint256 amountToGhost = ghostAmount;
+        uint256 amountToMaterialize = ghostAmount / 2;
 
         bytes32 receiver = bytes32(abi.encodePacked(ALICE));
         address storageHistory = gatekeeper.storageHistory();
@@ -40,17 +80,19 @@ contract GatekeeperStorageHistoryTest is Test {
         uint104 amountOut = snapshot.amountOut;
 
         if (ghostAmount % 2 == 0) {
-            vm.prank(ALICE);
+            staking.runGhost(receiver, amountToGhost);
-            gatekeeper.ghost(receiver, ghostAmount);
             // forge-lint: disable-next-line(unsafe-typecast)
-            amountIn += uint104(ghostAmount);
+            amountIn += uint104(amountToGhost);
         } else {
-            if (IStorageHistory(storageHistory).bridgeImbalance() >= ghostAmount) {
-                vm.prank(ALICE);
-                gatekeeper.materialize(0, ghostAmount, 0, BOB);
             // forge-lint: disable-next-line(unsafe-typecast)
-                amountOut += uint104(ghostAmount);
+            uint256 packed = RequestPacking.pack(0, uint64(block.chainid), BOB);
-            }
+            uint256 previousAmount = staking.materializedAmount(BOB);
+
+            staking.runMaterialize(exodusSession, amountToMaterialize, packed);
+            assertEq(previousAmount + amountToMaterialize, staking.materializedAmount(BOB));
+
+            // forge-lint: disable-next-line(unsafe-typecast)
+            amountOut += uint104(amountToMaterialize);
         }
 
         IStorageHistory.DeploymentSnapshot memory newSnapshot = IStorageHistory(storageHistory).deploymentSnapshot();
@@ -59,4 +101,29 @@ contract GatekeeperStorageHistoryTest is Test {
         assertEq(gatekeeper.ghostedSupply(), amountIn - amountOut);
     }
 
+    function test_inheritanceWorksForHistoricalStorge() public {
+        uint256 exodusSession = 69;
+        uint256 packed = RequestPacking.pack(0, uint64(block.chainid), BOB);
+        staking.runMaterialize(exodusSession, INIT_AMOUNT, packed);
+        staking.runGhost(bytes32(abi.encodePacked(ALICE)), INIT_AMOUNT);
+
+        address prevStorageHistory = gatekeeper.storageHistory();
+        IStorageHistory.DeploymentSnapshot memory prevSnapshot = IStorageHistory(prevStorageHistory).deploymentSnapshot();
+
+        staking.redoGatekeeper(EXISTENTIAL + 1);
+        assert(gatekeeper != staking.gatekeeper());
+
+        address currStorageHistory = gatekeeper.storageHistory();
+        IStorageHistory.DeploymentSnapshot memory currSnapshot = IStorageHistory(currStorageHistory).deploymentSnapshot();
+
+        assertEq(prevSnapshot.amountIn, currSnapshot.amountIn);
+        assertEq(prevSnapshot.amountOut, currSnapshot.amountOut);
+        assertEq(prevSnapshot.deployedAt, currSnapshot.deployedAt);
+
+        assert(IStorageHistory(prevStorageHistory).isTransactionExecuted(exodusSession));
+        assert(IStorageHistory(currStorageHistory).isTransactionExecuted(exodusSession));
+
+        assertEq(gatekeeper.existentialDeposit(), EXISTENTIAL);
+        assertEq(staking.gatekeeper().existentialDeposit(), EXISTENTIAL + 1);
+    }
 }