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Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- NFTBridgeImplementation
- Optimization enabled
- true
- Compiler version
- v0.8.4+commit.c7e474f2
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2022-10-11T20:46:42.084713Z
Contract source code
// SPDX-License-Identifier: Apache 2
// File: @openzeppelin/contracts/proxy/beacon/IBeacon.sol
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeacon {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/StorageSlot.sol
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// File: @openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol
pragma solidity ^0.8.2;
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967Upgrade {
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallSecure(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
address oldImplementation = _getImplementation();
// Initial upgrade and setup call
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
Address.functionDelegateCall(
newImplementation,
abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
);
rollbackTesting.value = false;
// Check rollback was effective
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
// Finally reset to the new implementation and log the upgrade
_upgradeTo(newImplementation);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
Address.isContract(IBeacon(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
}
}
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: contracts/libraries/external/BytesLib.sol
/*
* @title Solidity Bytes Arrays Utils
* @author Gonçalo Sá <goncalo.sa@consensys.net>
*
* @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.
* The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.
*/
pragma solidity >=0.8.0 <0.9.0;
library BytesLib {
function concat(
bytes memory _preBytes,
bytes memory _postBytes
)
internal
pure
returns (bytes memory)
{
bytes memory tempBytes;
assembly {
// Get a location of some free memory and store it in tempBytes as
// Solidity does for memory variables.
tempBytes := mload(0x40)
// Store the length of the first bytes array at the beginning of
// the memory for tempBytes.
let length := mload(_preBytes)
mstore(tempBytes, length)
// Maintain a memory counter for the current write location in the
// temp bytes array by adding the 32 bytes for the array length to
// the starting location.
let mc := add(tempBytes, 0x20)
// Stop copying when the memory counter reaches the length of the
// first bytes array.
let end := add(mc, length)
for {
// Initialize a copy counter to the start of the _preBytes data,
// 32 bytes into its memory.
let cc := add(_preBytes, 0x20)
} lt(mc, end) {
// Increase both counters by 32 bytes each iteration.
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
// Write the _preBytes data into the tempBytes memory 32 bytes
// at a time.
mstore(mc, mload(cc))
}
// Add the length of _postBytes to the current length of tempBytes
// and store it as the new length in the first 32 bytes of the
// tempBytes memory.
length := mload(_postBytes)
mstore(tempBytes, add(length, mload(tempBytes)))
// Move the memory counter back from a multiple of 0x20 to the
// actual end of the _preBytes data.
mc := end
// Stop copying when the memory counter reaches the new combined
// length of the arrays.
end := add(mc, length)
for {
let cc := add(_postBytes, 0x20)
} lt(mc, end) {
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
mstore(mc, mload(cc))
}
// Update the free-memory pointer by padding our last write location
// to 32 bytes: add 31 bytes to the end of tempBytes to move to the
// next 32 byte block, then round down to the nearest multiple of
// 32. If the sum of the length of the two arrays is zero then add
// one before rounding down to leave a blank 32 bytes (the length block with 0).
mstore(0x40, and(
add(add(end, iszero(add(length, mload(_preBytes)))), 31),
not(31) // Round down to the nearest 32 bytes.
))
}
return tempBytes;
}
function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {
assembly {
// Read the first 32 bytes of _preBytes storage, which is the length
// of the array. (We don't need to use the offset into the slot
// because arrays use the entire slot.)
let fslot := sload(_preBytes.slot)
// Arrays of 31 bytes or less have an even value in their slot,
// while longer arrays have an odd value. The actual length is
// the slot divided by two for odd values, and the lowest order
// byte divided by two for even values.
// If the slot is even, bitwise and the slot with 255 and divide by
// two to get the length. If the slot is odd, bitwise and the slot
// with -1 and divide by two.
let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
let mlength := mload(_postBytes)
let newlength := add(slength, mlength)
// slength can contain both the length and contents of the array
// if length < 32 bytes so let's prepare for that
// v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
switch add(lt(slength, 32), lt(newlength, 32))
case 2 {
// Since the new array still fits in the slot, we just need to
// update the contents of the slot.
// uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length
sstore(
_preBytes.slot,
// all the modifications to the slot are inside this
// next block
add(
// we can just add to the slot contents because the
// bytes we want to change are the LSBs
fslot,
add(
mul(
div(
// load the bytes from memory
mload(add(_postBytes, 0x20)),
// zero all bytes to the right
exp(0x100, sub(32, mlength))
),
// and now shift left the number of bytes to
// leave space for the length in the slot
exp(0x100, sub(32, newlength))
),
// increase length by the double of the memory
// bytes length
mul(mlength, 2)
)
)
)
}
case 1 {
// The stored value fits in the slot, but the combined value
// will exceed it.
// get the keccak hash to get the contents of the array
mstore(0x0, _preBytes.slot)
let sc := add(keccak256(0x0, 0x20), div(slength, 32))
// save new length
sstore(_preBytes.slot, add(mul(newlength, 2), 1))
// The contents of the _postBytes array start 32 bytes into
// the structure. Our first read should obtain the `submod`
// bytes that can fit into the unused space in the last word
// of the stored array. To get this, we read 32 bytes starting
// from `submod`, so the data we read overlaps with the array
// contents by `submod` bytes. Masking the lowest-order
// `submod` bytes allows us to add that value directly to the
// stored value.
let submod := sub(32, slength)
let mc := add(_postBytes, submod)
let end := add(_postBytes, mlength)
let mask := sub(exp(0x100, submod), 1)
sstore(
sc,
add(
and(
fslot,
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00
),
and(mload(mc), mask)
)
)
for {
mc := add(mc, 0x20)
sc := add(sc, 1)
} lt(mc, end) {
sc := add(sc, 1)
mc := add(mc, 0x20)
} {
sstore(sc, mload(mc))
}
mask := exp(0x100, sub(mc, end))
sstore(sc, mul(div(mload(mc), mask), mask))
}
default {
// get the keccak hash to get the contents of the array
mstore(0x0, _preBytes.slot)
// Start copying to the last used word of the stored array.
let sc := add(keccak256(0x0, 0x20), div(slength, 32))
// save new length
sstore(_preBytes.slot, add(mul(newlength, 2), 1))
// Copy over the first `submod` bytes of the new data as in
// case 1 above.
let slengthmod := mod(slength, 32)
let mlengthmod := mod(mlength, 32)
let submod := sub(32, slengthmod)
let mc := add(_postBytes, submod)
let end := add(_postBytes, mlength)
let mask := sub(exp(0x100, submod), 1)
sstore(sc, add(sload(sc), and(mload(mc), mask)))
for {
sc := add(sc, 1)
mc := add(mc, 0x20)
} lt(mc, end) {
sc := add(sc, 1)
mc := add(mc, 0x20)
} {
sstore(sc, mload(mc))
}
mask := exp(0x100, sub(mc, end))
sstore(sc, mul(div(mload(mc), mask), mask))
}
}
}
function slice(
bytes memory _bytes,
uint256 _start,
uint256 _length
)
internal
pure
returns (bytes memory)
{
require(_length + 31 >= _length, "slice_overflow");
require(_bytes.length >= _start + _length, "slice_outOfBounds");
bytes memory tempBytes;
assembly {
switch iszero(_length)
case 0 {
// Get a location of some free memory and store it in tempBytes as
// Solidity does for memory variables.
tempBytes := mload(0x40)
// The first word of the slice result is potentially a partial
// word read from the original array. To read it, we calculate
// the length of that partial word and start copying that many
// bytes into the array. The first word we copy will start with
// data we don't care about, but the last `lengthmod` bytes will
// land at the beginning of the contents of the new array. When
// we're done copying, we overwrite the full first word with
// the actual length of the slice.
let lengthmod := and(_length, 31)
// The multiplication in the next line is necessary
// because when slicing multiples of 32 bytes (lengthmod == 0)
// the following copy loop was copying the origin's length
// and then ending prematurely not copying everything it should.
let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
let end := add(mc, _length)
for {
// The multiplication in the next line has the same exact purpose
// as the one above.
let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
} lt(mc, end) {
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
mstore(mc, mload(cc))
}
mstore(tempBytes, _length)
//update free-memory pointer
//allocating the array padded to 32 bytes like the compiler does now
mstore(0x40, and(add(mc, 31), not(31)))
}
//if we want a zero-length slice let's just return a zero-length array
default {
tempBytes := mload(0x40)
//zero out the 32 bytes slice we are about to return
//we need to do it because Solidity does not garbage collect
mstore(tempBytes, 0)
mstore(0x40, add(tempBytes, 0x20))
}
}
return tempBytes;
}
function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {
require(_bytes.length >= _start + 20, "toAddress_outOfBounds");
address tempAddress;
assembly {
tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
}
return tempAddress;
}
function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {
require(_bytes.length >= _start + 1 , "toUint8_outOfBounds");
uint8 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x1), _start))
}
return tempUint;
}
function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) {
require(_bytes.length >= _start + 2, "toUint16_outOfBounds");
uint16 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x2), _start))
}
return tempUint;
}
function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) {
require(_bytes.length >= _start + 4, "toUint32_outOfBounds");
uint32 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x4), _start))
}
return tempUint;
}
function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) {
require(_bytes.length >= _start + 8, "toUint64_outOfBounds");
uint64 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x8), _start))
}
return tempUint;
}
function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) {
require(_bytes.length >= _start + 12, "toUint96_outOfBounds");
uint96 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0xc), _start))
}
return tempUint;
}
function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) {
require(_bytes.length >= _start + 16, "toUint128_outOfBounds");
uint128 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x10), _start))
}
return tempUint;
}
function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {
require(_bytes.length >= _start + 32, "toUint256_outOfBounds");
uint256 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x20), _start))
}
return tempUint;
}
function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {
require(_bytes.length >= _start + 32, "toBytes32_outOfBounds");
bytes32 tempBytes32;
assembly {
tempBytes32 := mload(add(add(_bytes, 0x20), _start))
}
return tempBytes32;
}
function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {
bool success = true;
assembly {
let length := mload(_preBytes)
// if lengths don't match the arrays are not equal
switch eq(length, mload(_postBytes))
case 1 {
// cb is a circuit breaker in the for loop since there's
// no said feature for inline assembly loops
// cb = 1 - don't breaker
// cb = 0 - break
let cb := 1
let mc := add(_preBytes, 0x20)
let end := add(mc, length)
for {
let cc := add(_postBytes, 0x20)
// the next line is the loop condition:
// while(uint256(mc < end) + cb == 2)
} eq(add(lt(mc, end), cb), 2) {
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
// if any of these checks fails then arrays are not equal
if iszero(eq(mload(mc), mload(cc))) {
// unsuccess:
success := 0
cb := 0
}
}
}
default {
// unsuccess:
success := 0
}
}
return success;
}
function equalStorage(
bytes storage _preBytes,
bytes memory _postBytes
)
internal
view
returns (bool)
{
bool success = true;
assembly {
// we know _preBytes_offset is 0
let fslot := sload(_preBytes.slot)
// Decode the length of the stored array like in concatStorage().
let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
let mlength := mload(_postBytes)
// if lengths don't match the arrays are not equal
switch eq(slength, mlength)
case 1 {
// slength can contain both the length and contents of the array
// if length < 32 bytes so let's prepare for that
// v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
if iszero(iszero(slength)) {
switch lt(slength, 32)
case 1 {
// blank the last byte which is the length
fslot := mul(div(fslot, 0x100), 0x100)
if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
// unsuccess:
success := 0
}
}
default {
// cb is a circuit breaker in the for loop since there's
// no said feature for inline assembly loops
// cb = 1 - don't breaker
// cb = 0 - break
let cb := 1
// get the keccak hash to get the contents of the array
mstore(0x0, _preBytes.slot)
let sc := keccak256(0x0, 0x20)
let mc := add(_postBytes, 0x20)
let end := add(mc, mlength)
// the next line is the loop condition:
// while(uint256(mc < end) + cb == 2)
for {} eq(add(lt(mc, end), cb), 2) {
sc := add(sc, 1)
mc := add(mc, 0x20)
} {
if iszero(eq(sload(sc), mload(mc))) {
// unsuccess:
success := 0
cb := 0
}
}
}
}
}
default {
// unsuccess:
success := 0
}
}
return success;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/Structs.sol
// contracts/Structs.sol
pragma solidity ^0.8.0;
interface Structs {
struct Provider {
uint16 chainId;
uint16 governanceChainId;
bytes32 governanceContract;
}
struct GuardianSet {
address[] keys;
uint32 expirationTime;
}
struct Signature {
bytes32 r;
bytes32 s;
uint8 v;
uint8 guardianIndex;
}
struct VM {
uint8 version;
uint32 timestamp;
uint32 nonce;
uint16 emitterChainId;
bytes32 emitterAddress;
uint64 sequence;
uint8 consistencyLevel;
bytes payload;
uint32 guardianSetIndex;
Signature[] signatures;
bytes32 hash;
}
}
// File: contracts/interfaces/IWormhole.sol
// contracts/Messages.sol
pragma solidity ^0.8.0;
interface IWormhole is Structs {
event LogMessagePublished(address indexed sender, uint64 sequence, uint32 nonce, bytes payload, uint8 consistencyLevel);
function publishMessage(
uint32 nonce,
bytes memory payload,
uint8 consistencyLevel
) external payable returns (uint64 sequence);
function parseAndVerifyVM(bytes calldata encodedVM) external view returns (Structs.VM memory vm, bool valid, string memory reason);
function verifyVM(Structs.VM memory vm) external view returns (bool valid, string memory reason);
function verifySignatures(bytes32 hash, Structs.Signature[] memory signatures, Structs.GuardianSet memory guardianSet) external pure returns (bool valid, string memory reason) ;
function parseVM(bytes memory encodedVM) external pure returns (Structs.VM memory vm);
function getGuardianSet(uint32 index) external view returns (Structs.GuardianSet memory) ;
function getCurrentGuardianSetIndex() external view returns (uint32) ;
function getGuardianSetExpiry() external view returns (uint32) ;
function governanceActionIsConsumed(bytes32 hash) external view returns (bool) ;
function isInitialized(address impl) external view returns (bool) ;
function chainId() external view returns (uint16) ;
function governanceChainId() external view returns (uint16);
function governanceContract() external view returns (bytes32);
function messageFee() external view returns (uint256) ;
}
// File: contracts/nft/NFTBridgeStructs.sol
// contracts/Structs.sol
pragma solidity ^0.8.0;
contract NFTBridgeStructs {
struct Transfer {
// PayloadID uint8 = 1
// Address of the token. Left-zero-padded if shorter than 32 bytes
bytes32 tokenAddress;
// Chain ID of the token
uint16 tokenChain;
// Symbol of the token
bytes32 symbol;
// Name of the token
bytes32 name;
// TokenID of the token
uint256 tokenID;
// URI of the token metadata (UTF-8)
string uri;
// Address of the recipient. Left-zero-padded if shorter than 32 bytes
bytes32 to;
// Chain ID of the recipient
uint16 toChain;
}
struct RegisterChain {
// Governance Header
// module: "NFTBridge" left-padded
bytes32 module;
// governance action: 1
uint8 action;
// governance paket chain id: this or 0
uint16 chainId;
// Chain ID
uint16 emitterChainID;
// Emitter address. Left-zero-padded if shorter than 32 bytes
bytes32 emitterAddress;
}
struct UpgradeContract {
// Governance Header
// module: "NFTBridge" left-padded
bytes32 module;
// governance action: 2
uint8 action;
// governance paket chain id
uint16 chainId;
// Address of the new contract
bytes32 newContract;
}
struct RecoverChainId {
// Governance Header
// module: "NFTBridge" left-padded
bytes32 module;
// governance action: 3
uint8 action;
// EIP-155 Chain ID
uint256 evmChainId;
// Chain ID
uint16 newChainId;
}
}
// File: contracts/nft/NFTBridgeState.sol
// contracts/State.sol
pragma solidity ^0.8.0;
contract NFTBridgeStorage {
struct Provider {
uint16 chainId;
uint16 governanceChainId;
// Required number of block confirmations to assume finality
uint8 finality;
bytes32 governanceContract;
}
struct Asset {
uint16 chainId;
bytes32 assetAddress;
}
struct SPLCache {
bytes32 name;
bytes32 symbol;
}
struct State {
address payable wormhole;
address tokenImplementation;
Provider provider;
// Mapping of consumed governance actions
mapping(bytes32 => bool) consumedGovernanceActions;
// Mapping of consumed token transfers
mapping(bytes32 => bool) completedTransfers;
// Mapping of initialized implementations
mapping(address => bool) initializedImplementations;
// Mapping of wrapped assets (chainID => nativeAddress => wrappedAddress)
mapping(uint16 => mapping(bytes32 => address)) wrappedAssets;
// Mapping to safely identify wrapped assets
mapping(address => bool) isWrappedAsset;
// Mapping of bridge contracts on other chains
mapping(uint16 => bytes32) bridgeImplementations;
// Mapping of spl token info caches (chainID => nativeAddress => SPLCache)
mapping(uint256 => SPLCache) splCache;
// EIP-155 Chain ID
uint256 evmChainId;
}
}
contract NFTBridgeState {
NFTBridgeStorage.State _state;
}
// File: contracts/nft/NFTBridgeGetters.sol
// contracts/Getters.sol
pragma solidity ^0.8.0;
contract NFTBridgeGetters is NFTBridgeState {
function governanceActionIsConsumed(bytes32 hash) public view returns (bool) {
return _state.consumedGovernanceActions[hash];
}
function isInitialized(address impl) public view returns (bool) {
return _state.initializedImplementations[impl];
}
function isTransferCompleted(bytes32 hash) public view returns (bool) {
return _state.completedTransfers[hash];
}
function wormhole() public view returns (IWormhole) {
return IWormhole(_state.wormhole);
}
function chainId() public view returns (uint16){
return _state.provider.chainId;
}
function evmChainId() public view returns (uint256) {
return _state.evmChainId;
}
function isFork() public view returns (bool) {
return evmChainId() != block.chainid;
}
function governanceChainId() public view returns (uint16){
return _state.provider.governanceChainId;
}
function governanceContract() public view returns (bytes32){
return _state.provider.governanceContract;
}
function wrappedAsset(uint16 tokenChainId, bytes32 tokenAddress) public view returns (address){
return _state.wrappedAssets[tokenChainId][tokenAddress];
}
function bridgeContracts(uint16 chainId_) public view returns (bytes32){
return _state.bridgeImplementations[chainId_];
}
function tokenImplementation() public view returns (address){
return _state.tokenImplementation;
}
function isWrappedAsset(address token) public view returns (bool){
return _state.isWrappedAsset[token];
}
function splCache(uint256 tokenId) public view returns (NFTBridgeStorage.SPLCache memory) {
return _state.splCache[tokenId];
}
function finality() public view returns (uint8) {
return _state.provider.finality;
}
}
// File: contracts/nft/NFTBridgeSetters.sol
// contracts/Setters.sol
pragma solidity ^0.8.0;
contract NFTBridgeSetters is NFTBridgeState {
function setInitialized(address implementatiom) internal {
_state.initializedImplementations[implementatiom] = true;
}
function setGovernanceActionConsumed(bytes32 hash) internal {
_state.consumedGovernanceActions[hash] = true;
}
function setTransferCompleted(bytes32 hash) internal {
_state.completedTransfers[hash] = true;
}
function setChainId(uint16 chainId) internal {
_state.provider.chainId = chainId;
}
function setGovernanceChainId(uint16 chainId) internal {
_state.provider.governanceChainId = chainId;
}
function setGovernanceContract(bytes32 governanceContract) internal {
_state.provider.governanceContract = governanceContract;
}
function setBridgeImplementation(uint16 chainId, bytes32 bridgeContract) internal {
_state.bridgeImplementations[chainId] = bridgeContract;
}
function setTokenImplementation(address impl) internal {
_state.tokenImplementation = impl;
}
function setWormhole(address wh) internal {
_state.wormhole = payable(wh);
}
function setWrappedAsset(uint16 tokenChainId, bytes32 tokenAddress, address wrapper) internal {
_state.wrappedAssets[tokenChainId][tokenAddress] = wrapper;
_state.isWrappedAsset[wrapper] = true;
}
function setSplCache(uint256 tokenId, NFTBridgeStorage.SPLCache memory cache) internal {
_state.splCache[tokenId] = cache;
}
function clearSplCache(uint256 tokenId) internal {
delete _state.splCache[tokenId];
}
function setFinality(uint8 finality) internal {
_state.provider.finality = finality;
}
function setEvmChainId(uint256 evmChainId) internal {
require(evmChainId == block.chainid, "invalid evmChainId");
_state.evmChainId = evmChainId;
}
}
// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/proxy/Proxy.sol
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// File: @openzeppelin/contracts/proxy/beacon/BeaconProxy.sol
pragma solidity ^0.8.0;
/**
* @dev This contract implements a proxy that gets the implementation address for each call from a {UpgradeableBeacon}.
*
* The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
* conflict with the storage layout of the implementation behind the proxy.
*
* _Available since v3.4._
*/
contract BeaconProxy is Proxy, ERC1967Upgrade {
/**
* @dev Initializes the proxy with `beacon`.
*
* If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
* will typically be an encoded function call, and allows initializating the storage of the proxy like a Solidity
* constructor.
*
* Requirements:
*
* - `beacon` must be a contract with the interface {IBeacon}.
*/
constructor(address beacon, bytes memory data) payable {
assert(_BEACON_SLOT == bytes32(uint256(keccak256("eip1967.proxy.beacon")) - 1));
_upgradeBeaconToAndCall(beacon, data, false);
}
/**
* @dev Returns the current beacon address.
*/
function _beacon() internal view virtual returns (address) {
return _getBeacon();
}
/**
* @dev Returns the current implementation address of the associated beacon.
*/
function _implementation() internal view virtual override returns (address) {
return IBeacon(_getBeacon()).implementation();
}
/**
* @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
*
* If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
*
* Requirements:
*
* - `beacon` must be a contract.
* - The implementation returned by `beacon` must be a contract.
*/
function _setBeacon(address beacon, bytes memory data) internal virtual {
_upgradeBeaconToAndCall(beacon, data, false);
}
}
// File: contracts/nft/token/NFT.sol
// contracts/Structs.sol
pragma solidity ^0.8.0;
contract BridgeNFT is BeaconProxy {
constructor(address beacon, bytes memory data) BeaconProxy(beacon, data) {
}
}
// File: contracts/nft/token/NFTState.sol
// contracts/State.sol
pragma solidity ^0.8.0;
contract NFTStorage {
struct State {
// Token name
string name;
// Token symbol
string symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) owners;
// Mapping owner address to token count
mapping(address => uint256) balances;
// Mapping from token ID to approved address
mapping(uint256 => address) tokenApprovals;
// Mapping from token ID to URI
mapping(uint256 => string) tokenURIs;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) operatorApprovals;
address owner;
bool initialized;
uint16 chainId;
bytes32 nativeContract;
}
}
contract NFTState {
NFTStorage.State _state;
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: contracts/nft/token/NFTImplementation.sol
// contracts/TokenImplementation.sol
pragma solidity ^0.8.0;
// Based on the OpenZepplin ERC721 implementation, licensed under MIT
contract NFTImplementation is NFTState, Context, IERC721, IERC721Metadata, ERC165 {
using Address for address;
using Strings for uint256;
function initialize(
string memory name_,
string memory symbol_,
address owner_,
uint16 chainId_,
bytes32 nativeContract_
) initializer public {
_state.name = name_;
_state.symbol = symbol_;
_state.owner = owner_;
_state.chainId = chainId_;
_state.nativeContract = nativeContract_;
}
function supportsInterface(bytes4 interfaceId) public view override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner_) public view override returns (uint256) {
require(owner_ != address(0), "ERC721: balance query for the zero address");
return _state.balances[owner_];
}
function ownerOf(uint256 tokenId) public view override returns (address) {
address owner_ = _state.owners[tokenId];
require(owner_ != address(0), "ERC721: owner query for nonexistent token");
return owner_;
}
function name() public view override returns (string memory) {
return _state.name;
}
function symbol() public view override returns (string memory) {
return _state.symbol;
}
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
return _state.tokenURIs[tokenId];
}
function chainId() public view returns (uint16) {
return _state.chainId;
}
function nativeContract() public view returns (bytes32) {
return _state.nativeContract;
}
function owner() public view returns (address) {
return _state.owner;
}
function approve(address to, uint256 tokenId) public override {
address owner_ = NFTImplementation.ownerOf(tokenId);
require(to != owner_, "ERC721: approval to current owner");
require(
_msgSender() == owner_ || isApprovedForAll(owner_, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _state.tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "ERC721: approve to caller");
_state.operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner_, address operator) public view override returns (bool) {
return _state.operatorApprovals[owner_][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _exists(uint256 tokenId) internal view returns (bool) {
return _state.owners[tokenId] != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner_ = NFTImplementation.ownerOf(tokenId);
return (spender == owner_ || getApproved(tokenId) == spender || isApprovedForAll(owner_, spender));
}
function mint(address to, uint256 tokenId, string memory uri) public onlyOwner {
_mint(to, tokenId, uri);
}
function _mint(address to, uint256 tokenId, string memory uri) internal {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_state.balances[to] += 1;
_state.owners[tokenId] = to;
_state.tokenURIs[tokenId] = uri;
emit Transfer(address(0), to, tokenId);
}
function burn(uint256 tokenId) public onlyOwner {
_burn(tokenId);
}
function _burn(uint256 tokenId) internal {
address owner_ = NFTImplementation.ownerOf(tokenId);
// Clear approvals
_approve(address(0), tokenId);
_state.balances[owner_] -= 1;
delete _state.owners[tokenId];
emit Transfer(owner_, address(0), tokenId);
}
function _transfer(
address from,
address to,
uint256 tokenId
) internal {
require(NFTImplementation.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_state.balances[from] -= 1;
_state.balances[to] += 1;
_state.owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal {
_state.tokenApprovals[tokenId] = to;
emit Approval(NFTImplementation.ownerOf(tokenId), to, tokenId);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
modifier onlyOwner() {
require(owner() == _msgSender(), "caller is not the owner");
_;
}
modifier initializer() {
require(
!_state.initialized,
"Already initialized"
);
_state.initialized = true;
_;
}
}
// File: contracts/nft/NFTBridgeGovernance.sol
// contracts/Bridge.sol
pragma solidity ^0.8.0;
contract NFTBridgeGovernance is NFTBridgeGetters, NFTBridgeSetters, ERC1967Upgrade {
using BytesLib for bytes;
// "NFTBridge" (left padded)
bytes32 constant module = 0x00000000000000000000000000000000000000000000004e4654427269646765;
// Execute a RegisterChain governance message
function registerChain(bytes memory encodedVM) public {
(IWormhole.VM memory vm, bool valid, string memory reason) = verifyGovernanceVM(encodedVM);
require(valid, reason);
setGovernanceActionConsumed(vm.hash);
NFTBridgeStructs.RegisterChain memory chain = parseRegisterChain(vm.payload);
require((chain.chainId == chainId() && !isFork()) || chain.chainId == 0, "invalid chain id");
setBridgeImplementation(chain.emitterChainID, chain.emitterAddress);
}
// Execute a UpgradeContract governance message
function upgrade(bytes memory encodedVM) public {
require(!isFork(), "invalid fork");
(IWormhole.VM memory vm, bool valid, string memory reason) = verifyGovernanceVM(encodedVM);
require(valid, reason);
setGovernanceActionConsumed(vm.hash);
NFTBridgeStructs.UpgradeContract memory implementation = parseUpgrade(vm.payload);
require(implementation.chainId == chainId(), "wrong chain id");
upgradeImplementation(address(uint160(uint256(implementation.newContract))));
}
/**
* @dev Updates the `chainId` and `evmChainId` on a forked chain via Governance VAA/VM
*/
function submitRecoverChainId(bytes memory encodedVM) public {
require(isFork(), "not a fork");
(IWormhole.VM memory vm, bool valid, string memory reason) = verifyGovernanceVM(encodedVM);
require(valid, reason);
setGovernanceActionConsumed(vm.hash);
NFTBridgeStructs.RecoverChainId memory rci = parseRecoverChainId(vm.payload);
// Verify the VAA is for this chain
require(rci.evmChainId == block.chainid, "invalid EVM Chain");
// Update the chainIds
setEvmChainId(rci.evmChainId);
setChainId(rci.newChainId);
}
function verifyGovernanceVM(bytes memory encodedVM) internal view returns (IWormhole.VM memory parsedVM, bool isValid, string memory invalidReason){
(IWormhole.VM memory vm, bool valid, string memory reason) = wormhole().parseAndVerifyVM(encodedVM);
if(!valid){
return (vm, valid, reason);
}
if (vm.emitterChainId != governanceChainId()) {
return (vm, false, "wrong governance chain");
}
if (vm.emitterAddress != governanceContract()) {
return (vm, false, "wrong governance contract");
}
if(governanceActionIsConsumed(vm.hash)){
return (vm, false, "governance action already consumed");
}
return (vm, true, "");
}
event ContractUpgraded(address indexed oldContract, address indexed newContract);
function upgradeImplementation(address newImplementation) internal {
address currentImplementation = _getImplementation();
_upgradeTo(newImplementation);
// Call initialize function of the new implementation
(bool success, bytes memory reason) = newImplementation.delegatecall(abi.encodeWithSignature("initialize()"));
require(success, string(reason));
emit ContractUpgraded(currentImplementation, newImplementation);
}
function parseRegisterChain(bytes memory encoded) public pure returns(NFTBridgeStructs.RegisterChain memory chain) {
uint index = 0;
// governance header
chain.module = encoded.toBytes32(index);
index += 32;
require(chain.module == module, "invalid RegisterChain: wrong module");
chain.action = encoded.toUint8(index);
index += 1;
require(chain.action == 1, "invalid RegisterChain: wrong action");
chain.chainId = encoded.toUint16(index);
index += 2;
// payload
chain.emitterChainID = encoded.toUint16(index);
index += 2;
chain.emitterAddress = encoded.toBytes32(index);
index += 32;
require(encoded.length == index, "invalid RegisterChain: wrong length");
}
function parseUpgrade(bytes memory encoded) public pure returns(NFTBridgeStructs.UpgradeContract memory chain) {
uint index = 0;
// governance header
chain.module = encoded.toBytes32(index);
index += 32;
require(chain.module == module, "invalid UpgradeContract: wrong module");
chain.action = encoded.toUint8(index);
index += 1;
require(chain.action == 2, "invalid UpgradeContract: wrong action");
chain.chainId = encoded.toUint16(index);
index += 2;
// payload
chain.newContract = encoded.toBytes32(index);
index += 32;
require(encoded.length == index, "invalid UpgradeContract: wrong length");
}
/// @dev Parse a recoverChainId (action 3) with minimal validation
function parseRecoverChainId(bytes memory encodedRecoverChainId) public pure returns (NFTBridgeStructs.RecoverChainId memory rci) {
uint index = 0;
rci.module = encodedRecoverChainId.toBytes32(index);
index += 32;
require(rci.module == module, "invalid RecoverChainId: wrong module");
rci.action = encodedRecoverChainId.toUint8(index);
index += 1;
require(rci.action == 3, "invalid RecoverChainId: wrong action");
rci.evmChainId = encodedRecoverChainId.toUint256(index);
index += 32;
rci.newChainId = encodedRecoverChainId.toUint16(index);
index += 2;
require(encodedRecoverChainId.length == index, "invalid RecoverChainId");
}
}
// File: contracts/nft/NFTBridge.sol
// contracts/Bridge.sol
pragma solidity ^0.8.0;
contract NFTBridge is NFTBridgeGovernance {
using BytesLib for bytes;
// Initiate a Transfer
function transferNFT(address token, uint256 tokenID, uint16 recipientChain, bytes32 recipient, uint32 nonce) public payable returns (uint64 sequence) {
// determine token parameters
uint16 tokenChain;
bytes32 tokenAddress;
if (isWrappedAsset(token)) {
tokenChain = NFTImplementation(token).chainId();
tokenAddress = NFTImplementation(token).nativeContract();
} else {
tokenChain = chainId();
tokenAddress = bytes32(uint256(uint160(token)));
// Verify that the correct interfaces are implemented
require(ERC165(token).supportsInterface(type(IERC721).interfaceId), "must support the ERC721 interface");
require(ERC165(token).supportsInterface(type(IERC721Metadata).interfaceId), "must support the ERC721-Metadata extension");
}
string memory symbolString;
string memory nameString;
string memory uriString;
{
if (tokenChain != 1) { // SPL tokens use cache
(,bytes memory queriedSymbol) = token.staticcall(abi.encodeWithSignature("symbol()"));
(,bytes memory queriedName) = token.staticcall(abi.encodeWithSignature("name()"));
symbolString = abi.decode(queriedSymbol, (string));
nameString = abi.decode(queriedName, (string));
}
(,bytes memory queriedURI) = token.staticcall(abi.encodeWithSignature("tokenURI(uint256)", tokenID));
uriString = abi.decode(queriedURI, (string));
}
bytes32 symbol;
bytes32 name;
if (tokenChain == 1) {
// use cached SPL token info, as the contracts uses unified values
NFTBridgeStorage.SPLCache memory cache = splCache(tokenID);
symbol = cache.symbol;
name = cache.name;
clearSplCache(tokenID);
} else {
assembly {
// first 32 bytes hold string length
// mload then loads the next word, i.e. the first 32 bytes of the strings
// NOTE: this means that we might end up with an
// invalid utf8 string (e.g. if we slice an emoji in half). The VAA
// payload specification doesn't require that these are valid utf8
// strings, and it's cheaper to do any validation off-chain for
// presentation purposes
symbol := mload(add(symbolString, 32))
name := mload(add(nameString, 32))
}
}
IERC721(token).safeTransferFrom(msg.sender, address(this), tokenID);
if (tokenChain != chainId()) {
NFTImplementation(token).burn(tokenID);
}
sequence = logTransfer(NFTBridgeStructs.Transfer({
tokenAddress : tokenAddress,
tokenChain : tokenChain,
name : name,
symbol : symbol,
tokenID : tokenID,
uri : uriString,
to : recipient,
toChain : recipientChain
}), msg.value, nonce);
}
function logTransfer(NFTBridgeStructs.Transfer memory transfer, uint256 callValue, uint32 nonce) internal returns (uint64 sequence) {
bytes memory encoded = encodeTransfer(transfer);
sequence = wormhole().publishMessage{
value : callValue
}(nonce, encoded, finality());
}
function completeTransfer(bytes memory encodedVm) public {
_completeTransfer(encodedVm);
}
// Execute a Transfer message
function _completeTransfer(bytes memory encodedVm) internal {
(IWormhole.VM memory vm, bool valid, string memory reason) = wormhole().parseAndVerifyVM(encodedVm);
require(valid, reason);
require(verifyBridgeVM(vm), "invalid emitter");
NFTBridgeStructs.Transfer memory transfer = parseTransfer(vm.payload);
require(!isTransferCompleted(vm.hash), "transfer already completed");
setTransferCompleted(vm.hash);
require(transfer.toChain == chainId(), "invalid target chain");
IERC721 transferToken;
if (transfer.tokenChain == chainId()) {
transferToken = IERC721(address(uint160(uint256(transfer.tokenAddress))));
} else {
address wrapped = wrappedAsset(transfer.tokenChain, transfer.tokenAddress);
// If the wrapped asset does not exist yet, create it
if (wrapped == address(0)) {
wrapped = _createWrapped(transfer.tokenChain, transfer.tokenAddress, transfer.name, transfer.symbol);
}
transferToken = IERC721(wrapped);
}
// transfer bridged NFT to recipient
address transferRecipient = address(uint160(uint256(transfer.to)));
if (transfer.tokenChain != chainId()) {
if (transfer.tokenChain == 1) {
// Cache SPL token info which otherwise would get lost
setSplCache(transfer.tokenID, NFTBridgeStorage.SPLCache({
name : transfer.name,
symbol : transfer.symbol
}));
}
// mint wrapped asset
NFTImplementation(address(transferToken)).mint(transferRecipient, transfer.tokenID, transfer.uri);
} else {
transferToken.safeTransferFrom(address(this), transferRecipient, transfer.tokenID);
}
}
// Creates a wrapped asset using AssetMeta
function _createWrapped(uint16 tokenChain, bytes32 tokenAddress, bytes32 name, bytes32 symbol) internal returns (address token) {
require(tokenChain != chainId(), "can only wrap tokens from foreign chains");
require(wrappedAsset(tokenChain, tokenAddress) == address(0), "wrapped asset already exists");
// SPL NFTs all use the same NFT contract, so unify the name
if (tokenChain == 1) {
// "Wormhole Bridged Solana-NFT" - right-padded
name = 0x576f726d686f6c65204272696467656420536f6c616e612d4e46540000000000;
// "WORMSPLNFT" - right-padded
symbol = 0x574f524d53504c4e465400000000000000000000000000000000000000000000;
}
// initialize the NFTImplementation
bytes memory initialisationArgs = abi.encodeWithSelector(
NFTImplementation.initialize.selector,
bytes32ToString(name),
bytes32ToString(symbol),
address(this),
tokenChain,
tokenAddress
);
// initialize the BeaconProxy
bytes memory constructorArgs = abi.encode(address(this), initialisationArgs);
// deployment code
bytes memory bytecode = abi.encodePacked(type(BridgeNFT).creationCode, constructorArgs);
bytes32 salt = keccak256(abi.encodePacked(tokenChain, tokenAddress));
assembly {
token := create2(0, add(bytecode, 0x20), mload(bytecode), salt)
if iszero(extcodesize(token)) {
revert(0, 0)
}
}
setWrappedAsset(tokenChain, tokenAddress, token);
}
function verifyBridgeVM(IWormhole.VM memory vm) internal view returns (bool){
require(!isFork(), "invalid fork");
if (bridgeContracts(vm.emitterChainId) == vm.emitterAddress) {
return true;
}
return false;
}
function encodeTransfer(NFTBridgeStructs.Transfer memory transfer) public pure returns (bytes memory encoded) {
// There is a global limit on 200 bytes of tokenURI in Wormhole due to Solana
require(bytes(transfer.uri).length <= 200, "tokenURI must not exceed 200 bytes");
encoded = abi.encodePacked(
uint8(1),
transfer.tokenAddress,
transfer.tokenChain,
transfer.symbol,
transfer.name,
transfer.tokenID,
uint8(bytes(transfer.uri).length),
transfer.uri,
transfer.to,
transfer.toChain
);
}
function parseTransfer(bytes memory encoded) public pure returns (NFTBridgeStructs.Transfer memory transfer) {
uint index = 0;
uint8 payloadID = encoded.toUint8(index);
index += 1;
require(payloadID == 1, "invalid Transfer");
transfer.tokenAddress = encoded.toBytes32(index);
index += 32;
transfer.tokenChain = encoded.toUint16(index);
index += 2;
transfer.symbol = encoded.toBytes32(index);
index += 32;
transfer.name = encoded.toBytes32(index);
index += 32;
transfer.tokenID = encoded.toUint256(index);
index += 32;
// Ignore length due to malformatted payload
index += 1;
transfer.uri = string(encoded.slice(index, encoded.length - index - 34));
// From here we read backwards due malformatted package
index = encoded.length;
index -= 2;
transfer.toChain = encoded.toUint16(index);
index -= 32;
transfer.to = encoded.toBytes32(index);
//require(encoded.length == index, "invalid Transfer");
}
function onERC721Received(
address operator,
address,
uint256,
bytes calldata
) external view returns (bytes4){
require(operator == address(this), "can only bridge tokens via transferNFT method");
return type(IERC721Receiver).interfaceId;
}
function bytes32ToString(bytes32 input) internal pure returns (string memory) {
uint256 i;
while (i < 32 && input[i] != 0) {
i++;
}
bytes memory array = new bytes(i);
for (uint c = 0; c < i; c++) {
array[c] = input[c];
}
return string(array);
}
}
// File: contracts/nft/NFTBridgeImplementation.sol
// contracts/Implementation.sol
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
contract NFTBridgeImplementation is NFTBridge {
// Beacon getter for the token contracts
function implementation() public view returns (address) {
return tokenImplementation();
}
function initialize() initializer public virtual {
// this function needs to be exposed for an upgrade to pass
uint256 evmChainId;
uint16 chain = chainId();
// Wormhole chain ids explicitly enumerated
if (chain == 2) { evmChainId = 1; // ethereum
} else if (chain == 4) { evmChainId = 56; // bsc
} else if (chain == 5) { evmChainId = 137; // polygon
} else if (chain == 6) { evmChainId = 43114; // avalanche
} else if (chain == 7) { evmChainId = 42262; // oasis
} else if (chain == 9) { evmChainId = 1313161554; // aurora
} else if (chain == 10) { evmChainId = 250; // fantom
} else if (chain == 11) { evmChainId = 686; // karura
} else if (chain == 12) { // acala
evmChainId = 787;
setFinality(1); // Is currently set to 15.
} else if (chain == 13) { evmChainId = 8217; // klaytn
} else if (chain == 14) { evmChainId = 42220; // celo
} else if (chain == 16) { evmChainId = 1284; // moonbeam
} else if (chain == 17) { evmChainId = 245022934; // neon
} else if (chain == 23) { evmChainId = 42161; // arbitrum
} else if (chain == 24) { evmChainId = 10; // optimism
} else if (chain == 25) { evmChainId = 100; // gnosis
} else {
revert("Unknown chain id.");
}
setEvmChainId(evmChainId);
}
modifier initializer() {
address impl = ERC1967Upgrade._getImplementation();
require(
!isInitialized(impl),
"already initialized"
);
setInitialized(impl);
_;
}
}
Contract ABI
[{"type":"event","name":"AdminChanged","inputs":[{"type":"address","name":"previousAdmin","internalType":"address","indexed":false},{"type":"address","name":"newAdmin","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"BeaconUpgraded","inputs":[{"type":"address","name":"beacon","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"ContractUpgraded","inputs":[{"type":"address","name":"oldContract","internalType":"address","indexed":true},{"type":"address","name":"newContract","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Upgraded","inputs":[{"type":"address","name":"implementation","internalType":"address","indexed":true}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"bridgeContracts","inputs":[{"type":"uint16","name":"chainId_","internalType":"uint16"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint16","name":"","internalType":"uint16"}],"name":"chainId","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"completeTransfer","inputs":[{"type":"bytes","name":"encodedVm","internalType":"bytes"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"bytes","name":"encoded","internalType":"bytes"}],"name":"encodeTransfer","inputs":[{"type":"tuple","name":"transfer","internalType":"struct NFTBridgeStructs.Transfer","components":[{"type":"bytes32","name":"tokenAddress","internalType":"bytes32"},{"type":"uint16","name":"tokenChain","internalType":"uint16"},{"type":"bytes32","name":"symbol","internalType":"bytes32"},{"type":"bytes32","name":"name","internalType":"bytes32"},{"type":"uint256","name":"tokenID","internalType":"uint256"},{"type":"string","name":"uri","internalType":"string"},{"type":"bytes32","name":"to","internalType":"bytes32"},{"type":"uint16","name":"toChain","internalType":"uint16"}]}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"evmChainId","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"finality","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"governanceActionIsConsumed","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint16","name":"","internalType":"uint16"}],"name":"governanceChainId","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"governanceContract","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"implementation","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isFork","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isInitialized","inputs":[{"type":"address","name":"impl","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isTransferCompleted","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isWrappedAsset","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes4","name":"","internalType":"bytes4"}],"name":"onERC721Received","inputs":[{"type":"address","name":"operator","internalType":"address"},{"type":"address","name":"","internalType":"address"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"bytes","name":"","internalType":"bytes"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"tuple","name":"rci","internalType":"struct NFTBridgeStructs.RecoverChainId","components":[{"type":"bytes32","name":"module","internalType":"bytes32"},{"type":"uint8","name":"action","internalType":"uint8"},{"type":"uint256","name":"evmChainId","internalType":"uint256"},{"type":"uint16","name":"newChainId","internalType":"uint16"}]}],"name":"parseRecoverChainId","inputs":[{"type":"bytes","name":"encodedRecoverChainId","internalType":"bytes"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"tuple","name":"chain","internalType":"struct NFTBridgeStructs.RegisterChain","components":[{"type":"bytes32","name":"module","internalType":"bytes32"},{"type":"uint8","name":"action","internalType":"uint8"},{"type":"uint16","name":"chainId","internalType":"uint16"},{"type":"uint16","name":"emitterChainID","internalType":"uint16"},{"type":"bytes32","name":"emitterAddress","internalType":"bytes32"}]}],"name":"parseRegisterChain","inputs":[{"type":"bytes","name":"encoded","internalType":"bytes"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"tuple","name":"transfer","internalType":"struct NFTBridgeStructs.Transfer","components":[{"type":"bytes32","name":"tokenAddress","internalType":"bytes32"},{"type":"uint16","name":"tokenChain","internalType":"uint16"},{"type":"bytes32","name":"symbol","internalType":"bytes32"},{"type":"bytes32","name":"name","internalType":"bytes32"},{"type":"uint256","name":"tokenID","internalType":"uint256"},{"type":"string","name":"uri","internalType":"string"},{"type":"bytes32","name":"to","internalType":"bytes32"},{"type":"uint16","name":"toChain","internalType":"uint16"}]}],"name":"parseTransfer","inputs":[{"type":"bytes","name":"encoded","internalType":"bytes"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"tuple","name":"chain","internalType":"struct NFTBridgeStructs.UpgradeContract","components":[{"type":"bytes32","name":"module","internalType":"bytes32"},{"type":"uint8","name":"action","internalType":"uint8"},{"type":"uint16","name":"chainId","internalType":"uint16"},{"type":"bytes32","name":"newContract","internalType":"bytes32"}]}],"name":"parseUpgrade","inputs":[{"type":"bytes","name":"encoded","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"registerChain","inputs":[{"type":"bytes","name":"encodedVM","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple","name":"","internalType":"struct NFTBridgeStorage.SPLCache","components":[{"type":"bytes32","name":"name","internalType":"bytes32"},{"type":"bytes32","name":"symbol","internalType":"bytes32"}]}],"name":"splCache","inputs":[{"type":"uint256","name":"tokenId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"submitRecoverChainId","inputs":[{"type":"bytes","name":"encodedVM","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"tokenImplementation","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[{"type":"uint64","name":"sequence","internalType":"uint64"}],"name":"transferNFT","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"tokenID","internalType":"uint256"},{"type":"uint16","name":"recipientChain","internalType":"uint16"},{"type":"bytes32","name":"recipient","internalType":"bytes32"},{"type":"uint32","name":"nonce","internalType":"uint32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"upgrade","inputs":[{"type":"bytes","name":"encodedVM","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IWormhole"}],"name":"wormhole","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"wrappedAsset","inputs":[{"type":"uint16","name":"tokenChainId","internalType":"uint16"},{"type":"bytes32","name":"tokenAddress","internalType":"bytes32"}]}]
Contract Creation Code
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