Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- CallistoBridge
- Optimization enabled
- true
- Compiler version
- v0.8.7+commit.e28d00a7
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2024-09-26T08:16:40.702009Z
Contract source code
// SPDX-License-Identifier: No License (None)
pragma solidity ^0.8.0;
interface IERC223TokenCloned {
// initialize cloned token just for ERC223TokenCloned
function initialize(address newOwner, string calldata name, string calldata symbol, uint8 decimals) external;
function mint(address user, uint256 amount) external;
function burnFrom(address account, uint256 amount) external returns(bool);
function burn(uint256 amount) external returns(bool);
function balanceOf(address account) external view returns (uint256);
function allowance(address _owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
}
interface IContractCaller {
function callContract(address user, address token, uint256 value, address toContract, bytes memory data) external payable;
}
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library Clones {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address implementation) internal returns (address instance) {
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `implementation` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(
address implementation,
bytes32 salt,
address deployer
) internal pure returns (address predicted) {
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt)
internal
view
returns (address predicted)
{
return predictDeterministicAddress(implementation, salt, address(this));
}
}
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
struct AddressSet {
// Storage of set values
address[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (address => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
if (!contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
address lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns 1-based index of value in the set. O(1).
*/
function indexOf(AddressSet storage set, address value) internal view returns (uint256) {
return set._indexes[value];
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
}
abstract contract Ownable {
address internal _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
/* will use initialize instead
constructor () {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
*/
/**
* @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() == msg.sender, "Ownable: caller is not the owner");
_;
}
}
contract CallistoBridge is Ownable {
using TransferHelper for address;
using EnumerableSet for EnumerableSet.AddressSet;
EnumerableSet.AddressSet authorities; // authority has to sign claim transaction (message)
address constant MAX_NATIVE_COINS = address(31); // addresses from address(1) to MAX_NATIVE_COINS are considered as native coins
// CLO = address(1)
struct Token {
address token; // foreign token address
bool isWrapped; // is native token wrapped of foreign
}
struct Upgrade {
address newContract;
uint64 validFrom;
}
uint256 public threshold; // minimum number of signatures required to approve swap
address public tokenImplementation; // implementation of wrapped token
address public feeTo; // send fee to this address
bool public frozen; // if frozen - swap will not work
uint256 public wrapNonce; // the last nonce used to create wrapped token address begin with 0xCC....
mapping(uint256 => mapping(bytes32 => bool)) public isTxProcessed; // chainID => txID => isProcessed
mapping(uint256 => mapping(address => Token)) public tokenPair; // chainID => native token address => Token struct
mapping(uint256 => mapping(address => address)) public tokenForeign; // chainID => foreign token address => native token
mapping(address => uint256) public tokenDeposits; // amount of tokens were deposited by users
mapping(address => bool) public isFreezer; // addresses that have right to freeze contract
uint256 public setupMode; // time when setup mode will start, 0 if disable
Upgrade public upgradeData;
address public founders;
address public requiredAuthority; // authority address that MUST sign swap transaction
mapping(address => address) public migration; // migration oldToken => newToken
bool public migrationSetupForbidden; // forbid adding migration tokens
address public contractCaller; // intermediate contract that calls third-party contract functions (toContract)
uint256 public functionMapping; // bitmap of locked functions (one bit per function)
event SetAuthority(address authority, bool isEnable);
event SetFeeTo(address previousFeeTo, address newFeeTo);
event SetThreshold(uint256 threshold);
event SetContractCaller(address newContractCaller);
event Deposit(address indexed token, address indexed sender, uint256 value, uint256 toChainId, address toToken);
event Claim(address indexed token, address indexed to, uint256 value, bytes32 txId, uint256 fromChainId, address fromToken);
event Fee(address indexed sender, uint256 fee);
event CreatePair(address toToken, bool isWrapped, address fromToken, uint256 fromChainId);
event Frozen(bool status);
event RescuedERC20(address token, address to, uint256 value);
event SetFreezer(address freezer, bool isActive);
event SetupMode(uint time);
event UpgradeRequest(address newContract, uint256 validFrom);
event AddTokenMigration(address tokenFrom, address tokenTo);
event BridgeToContract(address indexed token, address indexed sender, uint256 value, uint256 toChainId, address toToken, address toContract, bytes data);
event ClaimToContract(address indexed token, address indexed to, uint256 value, bytes32 txId, uint256 fromChainId, address fromToken, address toContract);
// run only once from proxy
function initialize(address newOwner, address newFounders, address _tokenImplementation) external {
require(newOwner != address(0) && newFounders != address(0) && founders == address(0)); // run only once
_owner = newOwner;
founders = newFounders;
emit OwnershipTransferred(address(0), msg.sender);
require(_tokenImplementation != address(0), "Wrong tokenImplementation");
tokenImplementation = _tokenImplementation;
feeTo = msg.sender;
threshold = 1;
setupMode = 1; // allow setup after deployment
}
/*
constructor (address _tokenImplementation) {
require(_tokenImplementation != address(0), "Wrong tokenImplementation");
tokenImplementation = _tokenImplementation;
feeTo = msg.sender;
threshold = 1;
}
*/
modifier notFrozen() {
require(!frozen, "Bridge is frozen");
_;
}
// allowed only in setup mode
modifier onlySetup() {
uint256 mode = setupMode; //use local variable to save gas
require(mode != 0 && mode < block.timestamp, "Not in setup mode");
_;
}
function upgradeTo() external view returns(address newContract) {
Upgrade memory upg = upgradeData;
require(upg.validFrom < block.timestamp && upg.newContract != address(0), "Upgrade not allowed");
newContract = upg.newContract;
}
function requestUpgrade(address newContract) external onlyOwner {
require(newContract != address(0), "Zero address");
uint256 validFrom = block.timestamp + 3 days;
upgradeData = Upgrade(newContract, uint64(validFrom));
emit UpgradeRequest(newContract, validFrom);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public {
require(founders == msg.sender, "Ownable: caller is not the founders");
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function ChangeFounder(address newFounders) public {
require(founders == msg.sender, "caller is not the founders");
require(newFounders != address(0), "new owner is the zero address");
emit OwnershipTransferred(founders, newFounders);
founders = newFounders;
}
// get number of authorities
function getAuthoritiesNumber() external view returns(uint256) {
return authorities.length();
}
// returns list of authorities addresses
function getAuthorities() external view returns(address[] memory) {
return authorities._values;
}
// Owner or Authority may freeze bridge in case of anomaly detection
function freeze() external {
require(msg.sender == owner() || authorities.contains(msg.sender) || isFreezer[msg.sender]);
frozen = true;
emit Frozen(true);
}
// Only owner can manually unfreeze contract
function unfreeze() external onlyOwner onlySetup {
frozen = false;
emit Frozen(false);
}
function lockFunctions(uint256 _functionMapping) external onlyOwner {
functionMapping = _functionMapping;
}
// add authority
function setFreezer(address freezer, bool isActive) external onlyOwner {
require(freezer != address(0), "Zero address");
isFreezer[freezer] = isActive;
emit SetFreezer(freezer, isActive);
}
// add authority
function addAuthority(address authority) external onlyOwner onlySetup {
require(authority != address(0), "Zero address");
require(authorities.length() < 255, "Too many authorities");
require(authorities.add(authority), "Authority already added");
emit SetAuthority(authority, true);
}
// remove authority
function removeAuthority(address authority) external onlyOwner {
require(authorities.remove(authority), "Authority does not exist");
emit SetAuthority(authority, false);
}
// set authority address that MUST sign claim request
function setRequiredAuthority(address authority) external onlyOwner onlySetup {
requiredAuthority = authority;
}
// set fee receiver address
function setFeeTo(address newFeeTo) external onlyOwner onlySetup {
require(newFeeTo != address(0), "Zero address");
address previousFeeTo = feeTo;
feeTo = newFeeTo;
emit SetFeeTo(previousFeeTo, newFeeTo);
}
// set threshold - minimum number of signatures required to approve swap
function setThreshold(uint256 _threshold) external onlyOwner onlySetup {
require(threshold != 0 && threshold <= authorities.length(), "Wrong threshold");
threshold = _threshold;
emit SetThreshold(threshold);
}
// set contractCaller address
function setContractCaller(address newContractCaller) external onlyOwner onlySetup {
contractCaller = newContractCaller;
emit SetContractCaller(newContractCaller);
}
function disableSetupMode() external onlyOwner {
setupMode = 0;
emit SetupMode(0);
}
function enableSetupMode() external onlyOwner {
setupMode = block.timestamp + 1 days;
emit SetupMode(setupMode);
}
// returns `nonce` to use in `createWrappedToken()` to create address starting with 0xCC.....
function calculateNonce() external view returns(uint256 nonce, address addr) {
nonce = wrapNonce;
address implementation = tokenImplementation;
while (true) {
nonce++;
addr = Clones.predictDeterministicAddress(implementation, bytes32(nonce));
if (uint160(addr) & uint160(0xfF00000000000000000000000000000000000000) == uint160(0xCc00000000000000000000000000000000000000))
break;
}
}
function rescueERC20(address token, address to) external onlyOwner {
uint256 value = IERC223TokenCloned(token).balanceOf(address(this)) - tokenDeposits[token];
token.safeTransfer(to, value);
emit RescuedERC20(token, to, value);
}
// Create wrapped token for foreign token
function createWrappedToken(
address fromToken, // foreign token address
uint256 fromChainId, // foreign chain ID where token deployed
string memory name, // wrapped token name
string memory symbol, // wrapped token symbol
uint8 decimals, // wrapped token decimals (should be the same as in original token)
uint256 nonce // nonce to create wrapped token address begin with 0xCC....
)
external
onlyOwner
onlySetup
{
require(fromToken != address(0), "Wrong token address");
require(tokenForeign[fromChainId][fromToken] == address(0), "This token already wrapped");
require(nonce > wrapNonce, "Nonce must be higher then wrapNonce");
wrapNonce = nonce;
address wrappedToken = Clones.cloneDeterministic(tokenImplementation, bytes32(nonce));
IERC223TokenCloned(wrappedToken).initialize(owner(), name, symbol, decimals);
tokenPair[fromChainId][wrappedToken] = Token(fromToken, true);
tokenForeign[fromChainId][fromToken] = wrappedToken;
emit CreatePair(wrappedToken, true, fromToken, fromChainId); //wrappedToken - wrapped token contract address
}
/**
* @dev Create pair between existing tokens on native and foreign chains
* @param toToken token address on native chain
* @param fromToken token address on foreign chain
* @param fromChainId foreign chain ID
* @param isWrapped `true` if `toToken` is our wrapped token otherwise `false`
*/
function createPair(address toToken, address fromToken, uint256 fromChainId, bool isWrapped) external onlyOwner onlySetup {
require(tokenPair[fromChainId][toToken].token == address(0), "Pair already exist");
tokenPair[fromChainId][toToken] = Token(fromToken, isWrapped);
tokenForeign[fromChainId][fromToken] = toToken;
emit CreatePair(toToken, isWrapped, fromToken, fromChainId);
}
/**
* @dev Delete unused pair
* @param toToken token address on native chain
* @param fromChainId foreign chain ID
*/
function deletePair(address toToken, uint256 fromChainId) external onlyOwner onlySetup {
delete tokenPair[fromChainId][toToken];
}
// Move tokens through the bridge and call the contract with 'data' parameters on the destination chain
function bridgeToContract(
address receiver, // address of token receiver on destination chain
address token, // token that user send (if token address < 32, then send native coin)
uint256 value, // tokens value
uint256 toChainId, // destination chain Id where will be claimed tokens
address toContract, // this contract will be called on destination chain
bytes memory data // this data will be passed to contract call (ABI encoded parameters)
)
external
payable
notFrozen
{
require(functionMapping & 2 == 0, "locked"); // check bit 1
require(receiver != address(0), "Incorrect receiver address");
address pair_token = _deposit(token, value, toChainId);
if (token == address(0xbf6c50889d3a620eb42C0F188b65aDe90De958c4) && // BUSDT token on the Callisto chain
pair_token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7) && // USDT token on the ETH chain
toChainId == 1 ) // destination is ETH chain
{
// Since USDT token on ETH chain has 6 decimals we have to convert 18 decimals of BUSDT to 6 decimals
value = value / 10**12;
}
emit BridgeToContract(token, receiver, value, toChainId, pair_token, toContract, data);
}
// Claim tokens from the bridge and call the contract with 'data' parameters
function claimToContract(
address token, // token to receive
bytes32 txId, // deposit transaction hash on fromChain
address to, // user address
uint256 value, // value of tokens
uint256 fromChainId, // chain ID where user deposited
address toContract, // this contract will be called on destination chain
bytes memory data, // this data will be passed to contract call (ABI encoded parameters)
bytes[] memory sig // authority signatures
)
external
payable
notFrozen
{
require(functionMapping & 4 == 0, "locked"); // check bit 2
require(!isTxProcessed[fromChainId][txId], "Transaction already processed");
Token memory pair = tokenPair[fromChainId][token];
require(pair.token != address(0), "There is no pair");
{
isTxProcessed[fromChainId][txId] = true;
// Check signature
address must = requiredAuthority;
bytes32 messageHash = keccak256(abi.encodePacked(token, to, value, txId, fromChainId, block.chainid, toContract, data));
messageHash = prefixed(messageHash);
uint256 uniqSig;
uint256 set; // maximum number of authorities is 255
for (uint i = 0; i < sig.length; i++) {
address authority = recoverSigner(messageHash, sig[i]);
if (authority == must) must = address(0);
uint256 index = authorities.indexOf(authority);
uint256 mask = 1 << index;
if (index != 0 && (set & mask) == 0 ) {
set |= mask;
uniqSig++;
}
}
require(threshold <= uniqSig, "Require more signatures");
require(must == address(0), "The required authority does not sign");
}
// fix decimals for USDT on ETH
if (token == address(0xbf6c50889d3a620eb42C0F188b65aDe90De958c4) && // BUSDT token on the Callisto chain
pair.token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7) && // USDT token on the ETH chain
fromChainId == 1 ) // from ETH chain
{
// Since USDT token on ETH chain has 6 decimals we have to convert 6 decimals to 18 decimals of BUSDT
value = value * 10**12;
}
if (msg.value != 0) to.safeTransferETH(msg.value); // send CLO to user as bonus
// Call toContract
if(isContract(toContract) && toContract != address(this)) {
if (token <= MAX_NATIVE_COINS) {
IContractCaller(contractCaller).callContract{value: value}(to, token, value, toContract, data);
} else {
if(pair.isWrapped) {
IERC223TokenCloned(token).mint(contractCaller, value);
} else {
tokenDeposits[token] -= value;
token.safeTransfer(contractCaller, value);
}
IContractCaller(contractCaller).callContract(to, token, value, toContract, data);
}
} else { // if not contract
if (token <= MAX_NATIVE_COINS) {
to.safeTransferETH(value);
} else {
if(pair.isWrapped) {
IERC223TokenCloned(token).mint(to, value);
} else {
tokenDeposits[token] -= value;
token.safeTransfer(to, value);
}
}
}
emit ClaimToContract(token, to, value, txId, fromChainId, pair.token, toContract);
}
// Due to issue in Callisto Explorer when createPair with isWrapped = 0 it sends transaction with isWrapped = 1
// It makes this pair unusable without chance to fix it.
// function reversIsWrapped allow to reverse isWrapped value
function reversIsWrapped(address toToken, uint256 fromChainId) external onlyOwner onlySetup {
bool isWrapped = tokenPair[fromChainId][toToken].isWrapped;
tokenPair[fromChainId][toToken].isWrapped = !isWrapped;
}
function depositTokens(
address receiver, // address of token receiver on destination chain
address token, // token that user send (if token address < 32, then send native coin)
uint256 value, // tokens value
uint256 toChainId // destination chain Id where will be claimed tokens
)
external
payable
notFrozen
{
require(functionMapping & 1 == 0, "locked"); // check bit 0
require(receiver != address(0), "Incorrect receiver address");
address pair_token = _deposit(token, value, toChainId);
if (token == address(0xbf6c50889d3a620eb42C0F188b65aDe90De958c4) && // BUSDT token on the Callisto chain
pair_token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7) && // USDT token on the ETH chain
toChainId == 1 ) // destination is ETH chain
{
// Since USDT token on ETH chain has 6 decimals we have to convert 18 decimals of BUSDT to 6 decimals
value = value / 10**12;
}
emit Deposit(token, receiver, value, toChainId, pair_token);
}
function depositTokens(
address token, // token that user send (if token address < 32, then send native coin)
uint256 value, // tokens value
uint256 toChainId // destination chain Id where will be claimed tokens
)
external
payable
notFrozen
{
address pair_token = _deposit(token, value, toChainId);
if (token == address(0xbf6c50889d3a620eb42C0F188b65aDe90De958c4) && // BUSDT token on the Callisto chain
pair_token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7) && // USDT token on the ETH chain
toChainId == 1 ) // destination is ETH chain
{
// Since USDT token on ETH chain has 6 decimals we have to convert 18 decimals of BUSDT to 6 decimals
value = value / 10**12;
}
emit Deposit(token, msg.sender, value, toChainId, pair_token);
}
// ERC223 token transfer callback
// bytes _data = abi.encode(address receiver, uint256 toChainId)
function tokenReceived(address _from, uint _value, bytes calldata _data) external {
require(_data.length == 64, "Incorrect _data");
(
address receiver, // address of token receiver on destination chain
uint256 toChainId // destination chain Id where will be claimed tokens
) = abi.decode(_data, (address, uint256));
require(receiver != address(0), "Incorrect receiver address");
address token = msg.sender;
Token memory pair = tokenPair[toChainId][token];
require(pair.token != address(0), "There is no pair");
if(pair.isWrapped) {
IERC223TokenCloned(token).burn(_value);
} else {
tokenDeposits[token] += _value;
}
emit Deposit(token, receiver, _value, toChainId, pair.token);
}
// migrate from ERC20 to ERC223
function migrate(address token, uint value) external {
address newToken = migration[token];
require(newToken != address(0), "No migration token");
IERC223TokenCloned(token).burnFrom(msg.sender, value);
IERC223TokenCloned(newToken).mint(msg.sender, value);
}
/*
// setup token migration
function setupTokenMigration(address tokenFrom, address tokenTo) external onlyOwner onlySetup {
require(!migrationSetupForbidden);
// assign tokenImplementation here to avoid creation unnecessary function
tokenImplementation = address(0x4320e2310274dF1C1A46319044286389C6D16987); // ERC223 token implementation.
migration[tokenFrom] = tokenTo;
emit AddTokenMigration(tokenFrom, tokenTo);
}
// forbid setup token migration
function forbidMigrationSetup() external onlyOwner onlySetup {
migrationSetupForbidden = true;
}
*/
function _deposit(
address token, // token that user send (if token address < 32, then send native coin)
uint256 value, // tokens value
uint256 toChainId // destination chain Id where will be claimed tokens
)
internal
returns (address pair_token)
{
Token memory pair = tokenPair[toChainId][token];
require(pair.token != address(0), "There is no pair");
pair_token = pair.token;
uint256 fee = msg.value;
if (token <= MAX_NATIVE_COINS) {
require(value <= msg.value, "Wrong value");
fee -= value;
} else {
if(pair.isWrapped) {
IERC223TokenCloned(token).burnFrom(msg.sender, value);
} else {
tokenDeposits[token] += value;
token.safeTransferFrom(msg.sender, address(this), value);
}
}
if (fee != 0) {
feeTo.safeTransferETH(fee);
emit Fee(msg.sender, fee);
}
}
// claim
function claim(
address token, // token to receive
bytes32 txId, // deposit transaction hash on fromChain
address to, // user address
uint256 value, // value of tokens
uint256 fromChainId, // chain ID where user deposited
bytes[] memory sig // authority signatures
)
external
notFrozen
{
require(!isTxProcessed[fromChainId][txId], "Transaction already processed");
Token memory pair = tokenPair[fromChainId][token];
require(pair.token != address(0), "There is no pair");
isTxProcessed[fromChainId][txId] = true;
address must = requiredAuthority;
bytes32 messageHash = keccak256(abi.encodePacked(token, to, value, txId, fromChainId, block.chainid));
messageHash = prefixed(messageHash);
uint256 uniqSig;
uint256 set; // maximum number of authorities is 255
for (uint i = 0; i < sig.length; i++) {
address authority = recoverSigner(messageHash, sig[i]);
if (authority == must) must = address(0);
uint256 index = authorities.indexOf(authority);
uint256 mask = 1 << index;
if (index != 0 && (set & mask) == 0 ) {
set |= mask;
uniqSig++;
}
}
require(threshold <= uniqSig, "Require more signatures");
require(must == address(0), "The required authority does not sign");
if (token == address(0xbf6c50889d3a620eb42C0F188b65aDe90De958c4) && // BUSDT token on the Callisto chain
pair.token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7) && // USDT token on the ETH chain
fromChainId == 1 ) // from ETH chain
{
// Since USDT token on ETH chain has 6 decimals we have to convert 6 decimals to 18 decimals of BUSDT
value = value * 10**12;
}
if (token <= MAX_NATIVE_COINS) {
to.safeTransferETH(value);
} else {
if(pair.isWrapped) {
IERC223TokenCloned(token).mint(to, value);
} else {
tokenDeposits[token] -= value;
token.safeTransfer(to, value);
}
}
emit Claim(token, to, value, txId, fromChainId, pair.token);
}
// Signature methods
function splitSignature(bytes memory sig)
internal
pure
returns (uint8 v, bytes32 r, bytes32 s)
{
require(sig.length == 65);
assembly {
// first 32 bytes, after the length prefix
r := mload(add(sig, 32))
// second 32 bytes
s := mload(add(sig, 64))
// final byte (first byte of the next 32 bytes)
v := byte(0, mload(add(sig, 96)))
}
}
function recoverSigner(bytes32 message, bytes memory sig)
internal
pure
returns (address)
{
uint8 v;
bytes32 r;
bytes32 s;
(v, r, s) = splitSignature(sig);
return ecrecover(message, v, r, s);
}
// Builds a prefixed hash to mimic the behavior of eth_sign.
function prefixed(bytes32 hash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
Contract ABI
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ility":"nonpayable","outputs":[],"name":"ChangeFounder","inputs":[{"type":"address","name":"newFounders","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addAuthority","inputs":[{"type":"address","name":"authority","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"bridgeToContract","inputs":[{"type":"address","name":"receiver","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"toChainId","internalType":"uint256"},{"type":"address","name":"toContract","internalType":"address"},{"type":"bytes","name":"data","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"nonce","internalType":"uint256"},{"type":"address","name":"addr","internalType":"address"}],"name":"calculateNonce","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"claim","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"bytes32","name":"txId","internalType":"bytes32"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"fromChainId","internalType":"uint256"},{"type":"bytes[]","name":"sig","internalType":"bytes[]"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"claimToContract","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"bytes32","name":"txId","internalType":"bytes32"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"fromChainId","internalType":"uint256"},{"type":"address","name":"toContract","internalType":"address"},{"type":"bytes","name":"data","internalType":"bytes"},{"type":"bytes[]","name":"sig","internalType":"bytes[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"contractCaller","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"createPair","inputs":[{"type":"address","name":"toToken","internalType":"address"},{"type":"address","name":"fromToken","internalType":"address"},{"type":"uint256","name":"fromChainId","internalType":"uint256"},{"type":"bool","name":"isWrapped","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"createWrappedToken","inputs":[{"type":"address","name":"fromToken","internalType":"address"},{"type":"uint256","name":"fromChainId","internalType":"uint256"},{"type":"string","name":"name","internalType":"string"},{"type":"string","name":"symbol","internalType":"string"},{"type":"uint8","name":"decimals","internalType":"uint8"},{"type":"uint256","name":"nonce","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"deletePair","inputs":[{"type":"address","name":"toToken","internalType":"address"},{"type":"uint256","name":"fromChainId","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"depositTokens","inputs":[{"type":"address","name":"receiver","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"toChainId","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"depositTokens","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"toChainId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"disableSetupMode","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"enableSetupMode","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"feeTo","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"founders","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"freeze","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"frozen","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"functionMapping","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address[]","name":"","internalType":"address[]"}],"name":"getAuthorities","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getAuthoritiesNumber","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[{"type":"address","name":"newOwner","internalType":"address"},{"type":"address","name":"newFounders","internalType":"address"},{"type":"address","name":"_tokenImplementation","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isFreezer","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isTxProcessed","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"lockFunctions","inputs":[{"type":"uint256","name":"_functionMapping","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"migrate","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"migration","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"migrationSetupForbidden","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeAuthority","inputs":[{"type":"address","name":"authority","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"requestUpgrade","inputs":[{"type":"address","name":"newContract","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"requiredAuthority","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"rescueERC20","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"address","name":"to","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"reversIsWrapped","inputs":[{"type":"address","name":"toToken","internalType":"address"},{"type":"uint256","name":"fromChainId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setContractCaller","inputs":[{"type":"address","name":"newContractCaller","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setFeeTo","inputs":[{"type":"address","name":"newFeeTo","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setFreezer","inputs":[{"type":"address","name":"freezer","internalType":"address"},{"type":"bool","name":"isActive","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setRequiredAuthority","inputs":[{"type":"address","name":"authority","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setThreshold","inputs":[{"type":"uint256","name":"_threshold","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"setupMode","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"threshold","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"tokenDeposits","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"tokenForeign","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"tokenImplementation","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"token","internalType":"address"},{"type":"bool","name":"isWrapped","internalType":"bool"}],"name":"tokenPair","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"tokenReceived","inputs":[{"type":"address","name":"_from","internalType":"address"},{"type":"uint256","name":"_value","internalType":"uint256"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unfreeze","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"newContract","internalType":"address"},{"type":"uint64","name":"validFrom","internalType":"uint64"}],"name":"upgradeData","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"newContract","internalType":"address"}],"name":"upgradeTo","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"wrapNonce","inputs":[]}]
Contract Creation Code
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