GatewayEVM
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Inherits: Initializable, AccessControlUpgradeable, UUPSUpgradeable, IGatewayEVM, ReentrancyGuardUpgradeable, PausableUpgradeable
The GatewayEVM contract is the endpoint to call smart contracts on external chains.
The contract doesn't hold any funds and should never have active allowances.
State Variables
custody
The address of the custody contract.
address public custody;tssAddress
The address of the TSS (Threshold Signature Scheme) contract.
address public tssAddress;zetaConnector
The address of the ZetaConnector contract.
address public zetaConnector;zetaToken
The address of the Zeta token contract.
address public zetaToken;TSS_ROLE
New role identifier for tss role.
bytes32 public constant TSS_ROLE = keccak256("TSS_ROLE");ASSET_HANDLER_ROLE
New role identifier for asset handler role.
bytes32 public constant ASSET_HANDLER_ROLE = keccak256("ASSET_HANDLER_ROLE");PAUSER_ROLE
New role identifier for pauser role.
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");Functions
constructor
constructor();initialize
Initialize with tss address. address of zeta token and admin account set as DEFAULT_ADMIN_ROLE.
Using admin to authorize upgrades and pause, and tss for tss role.
function initialize(address tssAddress_, address zetaToken_, address admin_) public initializer;_authorizeUpgrade
Authorizes the upgrade of the contract, sender must be owner.
function _authorizeUpgrade(address newImplementation) internal override onlyRole(DEFAULT_ADMIN_ROLE);Parameters
| Name | Type | Description |
|---|---|---|
newImplementation | address | Address of the new implementation. |
_execute
Internal function to execute a call to a destination address.
function _execute(address destination, bytes calldata data) internal returns (bytes memory);Parameters
| Name | Type | Description |
|---|---|---|
destination | address | Address to call. |
data | bytes | Calldata to pass to the call. |
Returns
| Name | Type | Description |
|---|---|---|
<none> | bytes | The result of the call. |
pause
Pause contract.
function pause() external onlyRole(PAUSER_ROLE);unpause
Unpause contract.
function unpause() external onlyRole(PAUSER_ROLE);executeRevert
Transfers msg.value to destination contract and executes it's onRevert function.
This function can only be called by the TSS address and it is payable.
function executeRevert(
address destination,
bytes calldata data,
RevertContext calldata revertContext
)
public
payable
onlyRole(TSS_ROLE)
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
destination | address | Address to call. |
data | bytes | Calldata to pass to the call. |
revertContext | RevertContext |
execute
Executes a call to a destination address without ERC20 tokens.
This function can only be called by the TSS address and it is payable.
function execute(
address destination,
bytes calldata data
)
external
payable
onlyRole(TSS_ROLE)
whenNotPaused
nonReentrant
returns (bytes memory);Parameters
| Name | Type | Description |
|---|---|---|
destination | address | Address to call. |
data | bytes | Calldata to pass to the call. |
Returns
| Name | Type | Description |
|---|---|---|
<none> | bytes | The result of the call. |
executeWithERC20
Executes a call to a destination contract using ERC20 tokens.
This function can only be called by the custody or connector address. It uses the ERC20 allowance system, resetting gateway allowance at the end.
function executeWithERC20(
address token,
address to,
uint256 amount,
bytes calldata data
)
public
onlyRole(ASSET_HANDLER_ROLE)
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
token | address | Address of the ERC20 token. |
to | address | Address of the contract to call. |
amount | uint256 | Amount of tokens to transfer. |
data | bytes | Calldata to pass to the call. |
revertWithERC20
Directly transfers ERC20 tokens and calls onRevert.
This function can only be called by the custody or connector address.
function revertWithERC20(
address token,
address to,
uint256 amount,
bytes calldata data,
RevertContext calldata revertContext
)
external
onlyRole(ASSET_HANDLER_ROLE)
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
token | address | Address of the ERC20 token. |
to | address | Address of the contract to call. |
amount | uint256 | Amount of tokens to transfer. |
data | bytes | Calldata to pass to the call. |
revertContext | RevertContext | Revert context to pass to onRevert. |
deposit
Deposits ETH to the TSS address.
function deposit(address receiver, RevertOptions calldata revertOptions) external payable whenNotPaused nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
receiver | address | Address of the receiver. |
revertOptions | RevertOptions | Revert options. |
deposit
Deposits ERC20 tokens to the custody or connector contract.
function deposit(
address receiver,
uint256 amount,
address asset,
RevertOptions calldata revertOptions
)
external
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
receiver | address | Address of the receiver. |
amount | uint256 | Amount of tokens to deposit. |
asset | address | Address of the ERC20 token. |
revertOptions | RevertOptions | Revert options. |
depositAndCall
Deposits ETH to the TSS address and calls an omnichain smart contract.
function depositAndCall(
address receiver,
bytes calldata payload,
RevertOptions calldata revertOptions
)
external
payable
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
receiver | address | Address of the receiver. |
payload | bytes | Calldata to pass to the call. |
revertOptions | RevertOptions | Revert options. |
depositAndCall
Deposits ERC20 tokens to the custody or connector contract and calls an omnichain smart contract.
function depositAndCall(
address receiver,
uint256 amount,
address asset,
bytes calldata payload,
RevertOptions calldata revertOptions
)
external
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
receiver | address | Address of the receiver. |
amount | uint256 | Amount of tokens to deposit. |
asset | address | Address of the ERC20 token. |
payload | bytes | Calldata to pass to the call. |
revertOptions | RevertOptions | Revert options. |
call
Calls an omnichain smart contract without asset transfer.
function call(
address receiver,
bytes calldata payload,
RevertOptions calldata revertOptions
)
external
whenNotPaused
nonReentrant;Parameters
| Name | Type | Description |
|---|---|---|
receiver | address | Address of the receiver. |
payload | bytes | Calldata to pass to the call. |
revertOptions | RevertOptions | Revert options. |
setCustody
Sets the custody contract address.
function setCustody(address custody_) external onlyRole(DEFAULT_ADMIN_ROLE);Parameters
| Name | Type | Description |
|---|---|---|
custody_ | address | Address of the custody contract. |
setConnector
Sets the connector contract address.
function setConnector(address zetaConnector_) external onlyRole(DEFAULT_ADMIN_ROLE);Parameters
| Name | Type | Description |
|---|---|---|
zetaConnector_ | address | Address of the connector contract. |
resetApproval
Resets the approval of a token for a specified address. This is used to ensure that the approval is set to zero before setting it to a new value.
function resetApproval(address token, address to) private returns (bool);Parameters
| Name | Type | Description |
|---|---|---|
token | address | Address of the ERC20 token. |
to | address | Address to reset the approval for. |
Returns
| Name | Type | Description |
|---|---|---|
<none> | bool | True if the approval reset was successful, false otherwise. |
transferFromToAssetHandler
Transfers tokens from the sender to the asset handler. This function handles the transfer of tokens to either the connector or custody contract based on the asset type.
function transferFromToAssetHandler(address from, address token, uint256 amount) private;Parameters
| Name | Type | Description |
|---|---|---|
from | address | Address of the sender. |
token | address | Address of the ERC20 token. |
amount | uint256 | Amount of tokens to transfer. |
transferToAssetHandler
Transfers tokens to the asset handler. This function handles the transfer of tokens to either the connector or custody contract based on the asset type.
function transferToAssetHandler(address token, uint256 amount) private;Parameters
| Name | Type | Description |
|---|---|---|
token | address | Address of the ERC20 token. |
amount | uint256 | Amount of tokens to transfer. |