feat: merge new token managers

contracts/InterchainTokenService.sol

@@ -262,7 +262,7 @@ contract InterchainTokenService is
      * part of a multicall involving multiple functions that could make remote contract calls.
      * @param salt The salt to be used during deployment.
      * @param destinationChain The name of the chain to deploy the TokenManager and standardized token to.
-     * @param tokenManagerType The type of TokenManager to be deployed.
+     * @param tokenManagerType The type of token manager to be deployed. Cannot be NATIVE_INTERCHAIN_TOKEN.
      * @param params The params that will be used to initialize the TokenManager.
      * @param gasValue The amount of native tokens to be used to pay for gas for the remote deployment.
      * @return tokenId The tokenId corresponding to the deployed TokenManager.
@@ -274,9 +274,14 @@ contract InterchainTokenService is
         bytes calldata params,
         uint256 gasValue
     ) external payable whenNotPaused returns (bytes32 tokenId) {
+        // Custom token managers can't be deployed with Interchain token mint burn type, which is reserved for interchain tokens
+        if (tokenManagerType == TokenManagerType.NATIVE_INTERCHAIN_TOKEN) revert CannotDeploy(tokenManagerType);
+
         address deployer = msg.sender;
 
-        if (deployer == interchainTokenFactory) deployer = TOKEN_FACTORY_DEPLOYER;
+        if (deployer == interchainTokenFactory) {
+            deployer = TOKEN_FACTORY_DEPLOYER;
+        }
 
         tokenId = interchainTokenId(deployer, salt);
 
@@ -321,7 +326,7 @@ contract InterchainTokenService is
         if (bytes(destinationChain).length == 0) {
             address tokenAddress = _deployInterchainToken(tokenId, minter, name, symbol, decimals);
 
-            _deployTokenManager(tokenId, TokenManagerType.MINT_BURN, abi.encode(minter, tokenAddress));
+            _deployTokenManager(tokenId, TokenManagerType.NATIVE_INTERCHAIN_TOKEN, abi.encode(minter, tokenAddress));
         } else {
             _deployRemoteInterchainToken(tokenId, name, symbol, decimals, minter, destinationChain, gasValue);
         }
@@ -756,14 +761,15 @@ contract InterchainTokenService is
 
     /**
      * @notice Processes a deploy token manager payload.
-     * @param payload The encoded data payload to be processed
      */
     function _processDeployTokenManagerPayload(bytes calldata payload) internal {
         (, bytes32 tokenId, TokenManagerType tokenManagerType, bytes memory params) = abi.decode(
             payload,
             (uint256, bytes32, TokenManagerType, bytes)
         );
 
+        if (tokenManagerType == TokenManagerType.NATIVE_INTERCHAIN_TOKEN) revert CannotDeploy(tokenManagerType);
+
         _deployTokenManager(tokenId, tokenManagerType, params);
     }
 
@@ -780,7 +786,7 @@ contract InterchainTokenService is
 
         tokenAddress = _deployInterchainToken(tokenId, minterBytes, name, symbol, decimals);
 
-        _deployTokenManager(tokenId, TokenManagerType.MINT_BURN, abi.encode(minterBytes, tokenAddress));
+        _deployTokenManager(tokenId, TokenManagerType.NATIVE_INTERCHAIN_TOKEN, abi.encode(minterBytes, tokenAddress));
     }
 
     /**

contracts/TokenHandler.sol

@@ -50,8 +50,13 @@ contract TokenHandler is ITokenHandler, ITokenManagerType, ReentrancyGuard, Crea
         /// @dev Track the flow amount being received via the message
         ITokenManager(tokenManager).addFlowIn(amount);
 
+        if (tokenManagerType == uint256(TokenManagerType.NATIVE_INTERCHAIN_TOKEN)) {
+            _giveInterchainToken(tokenAddress, to, amount);
+            return (amount, tokenAddress);
+        }
+
         if (tokenManagerType == uint256(TokenManagerType.MINT_BURN) || tokenManagerType == uint256(TokenManagerType.MINT_BURN_FROM)) {
-            _giveTokenMintBurn(tokenAddress, to, amount);
+            _mintToken(tokenManager, tokenAddress, to, amount);
             return (amount, tokenAddress);
         }
 
@@ -90,15 +95,16 @@ contract TokenHandler is ITokenHandler, ITokenManagerType, ReentrancyGuard, Crea
         uint256 amount
     ) external payable returns (uint256, string memory symbol) {
         address tokenManager = _create3Address(tokenId);
-
         (uint256 tokenManagerType, address tokenAddress) = ITokenManagerProxy(tokenManager).getImplementationTypeAndTokenAddress();
 
         if (tokenOnly && msg.sender != tokenAddress) revert NotToken(msg.sender, tokenAddress);
 
-        if (tokenManagerType == uint256(TokenManagerType.MINT_BURN)) {
-            _takeTokenMintBurn(tokenAddress, from, amount);
+        if (tokenManagerType == uint256(TokenManagerType.NATIVE_INTERCHAIN_TOKEN)) {
+            _takeInterchainToken(tokenAddress, from, amount);
+        } else if (tokenManagerType == uint256(TokenManagerType.MINT_BURN)) {
+            _burnToken(tokenManager, tokenAddress, from, amount);
         } else if (tokenManagerType == uint256(TokenManagerType.MINT_BURN_FROM)) {
-            _takeTokenMintBurnFrom(tokenAddress, from, amount);
+            _burnTokenFrom(tokenAddress, from, amount);
         } else if (tokenManagerType == uint256(TokenManagerType.LOCK_UNLOCK)) {
             _transferTokenFrom(tokenAddress, from, tokenManager, amount);
         } else if (tokenManagerType == uint256(TokenManagerType.LOCK_UNLOCK_FEE)) {
@@ -128,10 +134,10 @@ contract TokenHandler is ITokenHandler, ITokenManagerType, ReentrancyGuard, Crea
     // slither-disable-next-line locked-ether
     function transferTokenFrom(bytes32 tokenId, address from, address to, uint256 amount) external payable returns (uint256, address) {
         address tokenManager = _create3Address(tokenId);
-
         (uint256 tokenManagerType, address tokenAddress) = ITokenManagerProxy(tokenManager).getImplementationTypeAndTokenAddress();
 
         if (
+            tokenManagerType == uint256(TokenManagerType.NATIVE_INTERCHAIN_TOKEN) ||
             tokenManagerType == uint256(TokenManagerType.LOCK_UNLOCK) ||
             tokenManagerType == uint256(TokenManagerType.MINT_BURN) ||
             tokenManagerType == uint256(TokenManagerType.MINT_BURN_FROM) ||
@@ -195,15 +201,23 @@ contract TokenHandler is ITokenHandler, ITokenManagerType, ReentrancyGuard, Crea
         return amount;
     }
 
-    function _giveTokenMintBurn(address tokenAddress, address to, uint256 amount) internal {
+    function _giveInterchainToken(address tokenAddress, address to, uint256 amount) internal {
         IERC20(tokenAddress).safeCall(abi.encodeWithSelector(IERC20MintableBurnable.mint.selector, to, amount));
     }
 
-    function _takeTokenMintBurn(address tokenAddress, address from, uint256 amount) internal {
+    function _takeInterchainToken(address tokenAddress, address from, uint256 amount) internal {
         IERC20(tokenAddress).safeCall(abi.encodeWithSelector(IERC20MintableBurnable.burn.selector, from, amount));
     }
 
-    function _takeTokenMintBurnFrom(address tokenAddress, address from, uint256 amount) internal {
+    function _mintToken(address tokenManager, address tokenAddress, address to, uint256 amount) internal {
+        ITokenManager(tokenManager).mintToken(tokenAddress, to, amount);
+    }
+
+    function _burnToken(address tokenManager, address tokenAddress, address from, uint256 amount) internal {
+        ITokenManager(tokenManager).burnToken(tokenAddress, from, amount);
+    }
+
+    function _burnTokenFrom(address tokenAddress, address from, uint256 amount) internal {
         IERC20(tokenAddress).safeCall(abi.encodeWithSelector(IERC20BurnableFrom.burnFrom.selector, from, amount));
     }
 

contracts/interfaces/IInterchainTokenService.sol

@@ -47,6 +47,7 @@ interface IInterchainTokenService is
     error EmptyData();
     error PostDeployFailed(bytes data);
     error ZeroAmount();
+    error CannotDeploy(TokenManagerType);
     error InvalidGatewayTokenTransfer(bytes32 tokenId, bytes payload, string tokenSymbol, uint256 amount);
 
     event InterchainTransfer(
@@ -167,7 +168,7 @@ interface IInterchainTokenService is
      * @notice Deploys a custom token manager contract on a remote chain.
      * @param salt The salt used for token manager deployment.
      * @param destinationChain The name of the destination chain.
-     * @param tokenManagerType The type of token manager.
+     * @param tokenManagerType The type of token manager. Cannot be NATIVE_INTERCHAIN_TOKEN.
      * @param params The deployment parameters.
      * @param gasValue The gas value for deployment.
      * @return tokenId The tokenId associated with the token manager.

contracts/interfaces/ITokenManager.sol

@@ -74,4 +74,22 @@ interface ITokenManager is IBaseTokenManager, IOperator, IFlowLimit, IImplementa
      * @return params_ The resulting params to be passed to custom TokenManager deployments.
      */
     function params(bytes calldata operator_, address tokenAddress_) external pure returns (bytes memory params_);
+
+    /**
+     * @notice External function to allow the service to mint tokens through the tokenManager
+     * @dev This function should revert if called by anyone but the service.
+     * @param tokenAddress_ The address of the token, since its cheaper to pass it in instead of reading it as the token manager.
+     * @param to The recipient.
+     * @param amount The amount to mint.
+     */
+    function mintToken(address tokenAddress_, address to, uint256 amount) external;
+
+    /**
+     * @notice External function to allow the service to burn tokens through the tokenManager
+     * @dev This function should revert if called by anyone but the service.
+     * @param tokenAddress_ The address of the token, since its cheaper to pass it in instead of reading it as the token manager.
+     * @param from The address to burn the token from.
+     * @param amount The amount to burn.
+     */
+    function burnToken(address tokenAddress_, address from, uint256 amount) external;
 }

contracts/interfaces/ITokenManagerType.sol

@@ -8,10 +8,11 @@ pragma solidity ^0.8.0;
  */
 interface ITokenManagerType {
     enum TokenManagerType {
-        MINT_BURN,
-        MINT_BURN_FROM,
-        LOCK_UNLOCK,
-        LOCK_UNLOCK_FEE,
-        GATEWAY
+        NATIVE_INTERCHAIN_TOKEN, // This type is reserved for interchain tokens deployed by ITS, and can't be used by custom token managers.
+        MINT_BURN_FROM, // The token will be minted/burned on transfers. The token needs to give mint permission to the token manager, but burning happens via an approval.
+        LOCK_UNLOCK, // The token will be locked/unlocked at the token manager.
+        LOCK_UNLOCK_FEE, // The token will be locked/unlocked at the token manager, which will account for any fee-on-transfer behaviour.
+        MINT_BURN, // The token will be minted/burned on transfers. The token needs to give mint and burn permission to the token manager.
+        GATEWAY // The token will be sent throught the gateway via callContractWithToken
     }
 }

contracts/test/TestInterchainTokenStandard.sol

@@ -73,7 +73,7 @@ contract TestInterchainTokenStandard is InterchainTokenStandard, Minter, ERC20,
         _burn(account, amount);
     }
 
-    function burnFrom(address account, uint256 amount) external onlyRole(uint8(Roles.MINTER)) {
+    function burnFrom(address account, uint256 amount) external {
         uint256 currentAllowance = allowance[account][msg.sender];
         if (currentAllowance < amount) revert AllowanceExceeded();
         _approve(account, msg.sender, currentAllowance - amount);

contracts/token-manager/TokenManager.sol

@@ -10,6 +10,7 @@ import { SafeTokenCall } from '@axelar-network/axelar-gmp-sdk-solidity/contracts
 import { Multicall } from '@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/Multicall.sol';
 
 import { ITokenManager } from '../interfaces/ITokenManager.sol';
+import { IERC20MintableBurnable } from '../interfaces/IERC20MintableBurnable.sol';
 
 import { Operator } from '../utils/Operator.sol';
 import { FlowLimit } from '../utils/FlowLimit.sol';
@@ -190,4 +191,26 @@ contract TokenManager is ITokenManager, Operator, FlowLimit, Implementation, Mul
     function params(bytes calldata operator_, address tokenAddress_) external pure returns (bytes memory params_) {
         params_ = abi.encode(operator_, tokenAddress_);
     }
+
+    /**
+     * @notice External function to allow the service to mint tokens through the tokenManager
+     * @dev This function should revert if called by anyone but the service.
+     * @param tokenAddress_ The address of the token, since its cheaper to pass it in instead of reading it as the token manager.
+     * @param to The recipient.
+     * @param amount The amount to mint.
+     */
+    function mintToken(address tokenAddress_, address to, uint256 amount) external onlyService {
+        IERC20(tokenAddress_).safeCall(abi.encodeWithSelector(IERC20MintableBurnable.mint.selector, to, amount));
+    }
+
+    /**
+     * @notice External function to allow the service to burn tokens through the tokenManager
+     * @dev This function should revert if called by anyone but the service.
+     * @param tokenAddress_ The address of the token, since its cheaper to pass it in instead of reading it as the token manager.
+     * @param from The address to burn the token from.
+     * @param amount The amount to burn.
+     */
+    function burnToken(address tokenAddress_, address from, uint256 amount) external onlyService {
+        IERC20(tokenAddress_).safeCall(abi.encodeWithSelector(IERC20MintableBurnable.burn.selector, from, amount));
+    }
 }