taikoxyz · dantaik · Sep 6, 2023 · Sep 6, 2023 · Sep 6, 2023 · Sep 6, 2023
diff --git a/packages/protocol/contracts/L1/TaikoData.sol b/packages/protocol/contracts/L1/TaikoData.sol
@@ -128,17 +128,18 @@ library TaikoData {
     }
 
     /// @dev Struct representing state transition data.
-    /// 4 slots.
+    /// 10 slots reserved for upgradability, 4 slots used.
     struct Transition {
         bytes32 key; //only written/read for the 1st state transition.
         bytes32 blockHash;
         bytes32 signalRoot;
         address prover;
         uint64 provenAt;
+        bytes32[6] __reserved;
     }
 
     /// @dev Struct containing data required for verifying a block.
-    /// 3 slots.
+    /// 10 slots reserved for upgradability, 3 slots used.
     struct Block {
         bytes32 metaHash; // slot 1
         address prover; // slot 2
@@ -147,15 +148,18 @@ library TaikoData {
         uint64 proposedAt;
         uint32 nextTransitionId;
         uint32 verifiedTransitionId;
+        bytes32[7] __reserved;
     }
 
     /// @dev Struct representing information about a transaction list.
+    /// 1 slot used.
     struct TxListInfo {
         uint64 validSince;
         uint24 size;
     }
 
     /// @dev Struct representing an Ethereum deposit.
+    /// 1 slot used.
     struct EthDeposit {
         address recipient;
         uint96 amount;
@@ -203,6 +207,6 @@ library TaikoData {
         mapping(address account => uint256 balance) taikoTokenBalances;
         SlotA slotA; // slot 7
         SlotB slotB; // slot 8
-        uint256[42] __gap;
+        uint256[142] __gap;
     }
 }
diff --git a/packages/protocol/contracts/L1/TaikoEvents.sol b/packages/protocol/contracts/L1/TaikoEvents.sol
@@ -55,4 +55,12 @@ abstract contract TaikoEvents {
     /// @param deposit The Ethereum deposit information including recipient,
     /// amount, and ID.
     event EthDeposited(TaikoData.EthDeposit deposit);
+
+    /// @dev The following events are emitted when bonds are received, returned,
+    /// or rewarded. Note that no event is emitted when a bond is kept/burnt as
+    /// for a single block, multiple bonds may get burned or retained by the
+    /// protocol, emitting events will consume more gas.
+    event BondReceived(address indexed from, uint64 blockId, uint256 bond);
+    event BondReturned(address indexed to, uint64 blockId, uint256 bond);
+    event BondRewarded(address indexed to, uint64 blockId, uint256 bond);
 }
diff --git a/packages/protocol/contracts/L1/libs/LibDepositing.sol b/packages/protocol/contracts/L1/libs/LibDepositing.sol
@@ -9,16 +9,13 @@ pragma solidity ^0.8.20;
 import { AddressResolver } from "../../common/AddressResolver.sol";
 import { LibAddress } from "../../libs/LibAddress.sol";
 import { LibMath } from "../../libs/LibMath.sol";
-import { SafeCastUpgradeable } from
-    "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import { TaikoData } from "../TaikoData.sol";
 
 /// @title LibDepositing
 /// @notice A library for handling Ether deposits in the Taiko protocol.
 library LibDepositing {
     using LibAddress for address;
     using LibMath for uint256;
-    using SafeCastUpgradeable for uint256;
 
     event EthDeposited(TaikoData.EthDeposit deposit);
 
@@ -51,12 +48,14 @@ library LibDepositing {
         address _recipient = recipient == address(0) ? msg.sender : recipient;
         uint256 slot =
             state.slotA.numEthDeposits % config.ethDepositRingBufferSize;
+
+        // range of msg.value is checked by next line.
         state.ethDeposits[slot] = _encodeEthDeposit(_recipient, msg.value);
 
         emit EthDeposited(
             TaikoData.EthDeposit({
                 recipient: _recipient,
-                amount: msg.value.toUint96(),
+                amount: uint96(msg.value),
                 id: state.slotA.numEthDeposits
             })
         );

diff --git a/packages/protocol/contracts/L1/libs/LibProposing.sol b/packages/protocol/contracts/L1/libs/LibProposing.sol
@@ -36,6 +36,7 @@ library LibProposing {
         uint256 reward,
         TaikoData.BlockMetadata meta
     );
+    event BondReceived(address indexed from, uint64 blockId, uint256 bond);
 
     error L1_INVALID_ASSIGNMENT();
     error L1_INVALID_BLOCK_ID();
@@ -89,6 +90,8 @@ library LibProposing {
             amount: config.proofBond
         });
 
+        emit BondReceived(assignment.prover, b.numBlocks, config.proofBond);
+
         // Pay prover after verifying assignment
         if (config.skipProverAssignmentVerificaiton) {
             // For testing only

diff --git a/packages/protocol/contracts/L1/libs/LibProving.sol b/packages/protocol/contracts/L1/libs/LibProving.sol
@@ -73,8 +73,7 @@ library LibProving {
             // A block can be proven by a regular prover in the following cases:
             // 1. The actual prover is the assigned prover
             // 2. The block has at least one state transition (which must be
-            // from the
-            // assigned prover)
+            // from the assigned prover)
             // 3. The block has become open
             if (
                 evidence.prover != blk.prover && blk.nextTransitionId == 1

diff --git a/packages/protocol/contracts/L1/libs/LibVerifying.sol b/packages/protocol/contracts/L1/libs/LibVerifying.sol
@@ -26,6 +26,8 @@ library LibVerifying {
     event CrossChainSynced(
         uint64 indexed srcHeight, bytes32 blockHash, bytes32 signalRoot
     );
+    event BondReturned(address indexed to, uint64 blockId, uint256 bond);
+    event BondRewarded(address indexed to, uint64 blockId, uint256 bond);
 
     error L1_BLOCK_ID_MISMATCH();
     error L1_INVALID_CONFIG();
@@ -146,8 +148,11 @@ library LibVerifying {
                         || tran.provenAt <= blk.proposedAt + config.proofWindow
                 ) {
                     state.taikoTokenBalances[blk.prover] += blk.proofBond;
+                    emit BondReturned(blk.prover, blockId, blk.proofBond);
                 } else {
-                    state.taikoTokenBalances[tran.prover] += blk.proofBond / 4;
+                    uint256 rewardAmount = blk.proofBond / 4;
+                    state.taikoTokenBalances[tran.prover] += rewardAmount;
+                    emit BondRewarded(tran.prover, blockId, rewardAmount);
                 }
 
                 emit BlockVerified(blockId, tran.prover, tran.blockHash);

diff --git a/packages/protocol/contracts/L2/TaikoL2.sol b/packages/protocol/contracts/L2/TaikoL2.sol
@@ -11,8 +11,6 @@ import { ICrossChainSync } from "../common/ICrossChainSync.sol";
 import { Lib1559Math } from "../libs/Lib1559Math.sol";
 import { LibMath } from "../libs/LibMath.sol";
 import { Proxied } from "../common/Proxied.sol";
-import { SafeCastUpgradeable } from
-    "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import { TaikoL2Signer } from "./TaikoL2Signer.sol";
 
 /// @title TaikoL2
@@ -22,7 +20,6 @@ import { TaikoL2Signer } from "./TaikoL2Signer.sol";
 /// communication, manage EIP-1559 parameters for gas pricing, and store
 /// verified L1 block information.
 contract TaikoL2 is EssentialContract, TaikoL2Signer, ICrossChainSync {
-    using SafeCastUpgradeable for uint256;
     using LibMath for uint256;
 
     struct VerifiedBlock {
@@ -59,7 +56,7 @@ contract TaikoL2 is EssentialContract, TaikoL2Signer, ICrossChainSync {
     uint64 public gasExcess;
     uint64 private __reserved1;
 
-    uint256[45] private __gap;
+    uint256[145] private __gap;
 
     // Captures all block variables mentioned in
     // https://docs.soliditylang.org/en/v0.8.20/units-and-global-variables.html

diff --git a/packages/protocol/script/DeployOnL1.s.sol b/packages/protocol/script/DeployOnL1.s.sol
@@ -10,7 +10,6 @@ import "forge-std/Script.sol";
 import "forge-std/console2.sol";
 import
     "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../contracts/L1/TaikoToken.sol";
 import "../contracts/L1/TaikoL1.sol";
 import "../contracts/L1/ProofVerifier.sol";
@@ -24,8 +23,6 @@ import "../contracts/test/erc20/FreeMintERC20.sol";
 import "../contracts/test/erc20/MayFailFreeMintERC20.sol";
 
 contract DeployOnL1 is Script {
-    using SafeCastUpgradeable for uint256;
-
     bytes32 public genesisHash = vm.envBytes32("L2_GENESIS_HASH");
 
     uint256 public deployerPrivateKey = vm.envUint("PRIVATE_KEY");

diff --git a/packages/protocol/script/upgrade/SetAddressManager.s.sol b/packages/protocol/script/upgrade/SetAddressManager.s.sol
@@ -8,7 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "./UpgradeScript.s.sol";
 
 interface IEssentialContract {

diff --git a/packages/protocol/script/upgrade/TransferOwnership.s.sol b/packages/protocol/script/upgrade/TransferOwnership.s.sol
@@ -8,7 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "./UpgradeScript.s.sol";
 
 interface IOwnable {

diff --git a/packages/protocol/script/upgrade/UpgradeAddressManager.s.sol b/packages/protocol/script/upgrade/UpgradeAddressManager.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/common/AddressManager.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeBridge.s.sol b/packages/protocol/script/upgrade/UpgradeBridge.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/bridge/Bridge.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeERC1155Vault.s.sol b/packages/protocol/script/upgrade/UpgradeERC1155Vault.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/tokenvault/ERC1155Vault.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeERC20Vault.s.sol b/packages/protocol/script/upgrade/UpgradeERC20Vault.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/tokenvault/ERC20Vault.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeERC721Vault.s.sol b/packages/protocol/script/upgrade/UpgradeERC721Vault.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/tokenvault/ERC721Vault.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeScript.s.sol b/packages/protocol/script/upgrade/UpgradeScript.s.sol
@@ -10,7 +10,6 @@ import "forge-std/Script.sol";
 import "forge-std/console2.sol";
 import
     "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 
 contract UpgradeScript is Script {
     uint256 public deployerPrivateKey = vm.envUint("PRIVATE_KEY");

diff --git a/packages/protocol/script/upgrade/UpgradeSignalService.sol b/packages/protocol/script/upgrade/UpgradeSignalService.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/signal/SignalService.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeTaikoL1.s.sol b/packages/protocol/script/upgrade/UpgradeTaikoL1.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/L1/TaikoL1.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeTaikoL2.s.sol b/packages/protocol/script/upgrade/UpgradeTaikoL2.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/L2/TaikoL2.sol";
 import "./UpgradeScript.s.sol";
 

diff --git a/packages/protocol/script/upgrade/UpgradeTaikoToken.s.sol b/packages/protocol/script/upgrade/UpgradeTaikoToken.s.sol
@@ -8,9 +8,6 @@ pragma solidity ^0.8.20;
 
 import "forge-std/Script.sol";
 import "forge-std/console2.sol";
-import
-    "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
-import "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol";
 import "../../contracts/L1/TaikoToken.sol";
 import "./UpgradeScript.s.sol";