Contract Address Details

0x3b53D2C7B44d40BE05Fa5E2309FFeB6eB2492d88

Contract Name
PeggedTokenBridgeV2
Creator
0x00778c–ec1c1f at 0x529ccf–25281b
Balance
0 ROSE
Tokens
Fetching tokens...
Transactions
243 Transactions
Transfers
0 Transfers
Gas Used
29,908,009
Last Balance Update
3014416
Contract name:
PeggedTokenBridgeV2




Optimization enabled
true
Compiler version
v0.8.9+commit.e5eed63a




Optimization runs
800
Verified at
2022-08-11 14:13:23.231221Z

Constructor Arguments

000000000000000000000000841ce48f9446c8e281d3f1444cb859b4a6d0738c

Arg [0] (address) : 0x841ce48f9446c8e281d3f1444cb859b4a6d0738c

              

./contracts/pegged-bridge/PeggedTokenBridgeV2.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import "../interfaces/ISigsVerifier.sol";
import "../interfaces/IPeggedToken.sol";
import "../interfaces/IPeggedTokenBurnFrom.sol";
import "../libraries/PbPegged.sol";
import "../safeguard/Pauser.sol";
import "../safeguard/VolumeControl.sol";
import "../safeguard/DelayedTransfer.sol";
/**
* @title The bridge contract to mint and burn pegged tokens
* @dev Work together with OriginalTokenVault deployed at remote chains.
*/
contract PeggedTokenBridgeV2 is Pauser, VolumeControl, DelayedTransfer {
ISigsVerifier public immutable sigsVerifier;
mapping(bytes32 => bool) public records;
mapping(address => uint256) public supplies;
mapping(address => uint256) public minBurn;
mapping(address => uint256) public maxBurn;
event Mint(
bytes32 mintId,
address token,
address account,
uint256 amount,
// ref_chain_id defines the reference chain ID, taking values of:
// 1. The common case: the chain ID on which the remote corresponding deposit or burn happened;
// 2. Refund for wrong burn: this chain ID on which the burn happened
uint64 refChainId,
// ref_id defines a unique reference ID, taking values of:
// 1. The common case of deposit/burn-mint: the deposit or burn ID on the remote chain;
// 2. Refund for wrong burn: the burn ID on this chain
bytes32 refId,
address depositor
);
event Burn(
bytes32 burnId,
address token,
address account,
uint256 amount,
uint64 toChainId,
address toAccount,
uint64 nonce
);
event MinBurnUpdated(address token, uint256 amount);
event MaxBurnUpdated(address token, uint256 amount);
event SupplyUpdated(address token, uint256 supply);
constructor(ISigsVerifier _sigsVerifier) {
sigsVerifier = _sigsVerifier;
}
/**
* @notice Mint tokens triggered by deposit at a remote chain's OriginalTokenVault.
* @param _request The serialized Mint protobuf.
* @param _sigs The list of signatures sorted by signing addresses in ascending order. A relay must be signed-off by
* +2/3 of the sigsVerifier's current signing power to be delivered.
* @param _signers The sorted list of signers.
* @param _powers The signing powers of the signers.
*/
function mint(
bytes calldata _request,
bytes[] calldata _sigs,
address[] calldata _signers,
uint256[] calldata _powers
) external whenNotPaused returns (bytes32) {
bytes32 domain = keccak256(abi.encodePacked(block.chainid, address(this), "Mint"));
sigsVerifier.verifySigs(abi.encodePacked(domain, _request), _sigs, _signers, _powers);
PbPegged.Mint memory request = PbPegged.decMint(_request);
bytes32 mintId = keccak256(
// len = 20 + 20 + 32 + 20 + 8 + 32 + 20 = 152
abi.encodePacked(
request.account,
request.token,
request.amount,
request.depositor,
request.refChainId,
request.refId,
address(this)
)
);
require(records[mintId] == false, "record exists");
records[mintId] = true;
_updateVolume(request.token, request.amount);
uint256 delayThreshold = delayThresholds[request.token];
if (delayThreshold > 0 && request.amount > delayThreshold) {
_addDelayedTransfer(mintId, request.account, request.token, request.amount);
} else {
IPeggedToken(request.token).mint(request.account, request.amount);
}
supplies[request.token] += request.amount;
emit Mint(
mintId,
request.token,
request.account,
request.amount,
request.refChainId,
request.refId,
request.depositor
);
return mintId;
}
/**
* @notice Burn pegged tokens to trigger a cross-chain withdrawal of the original tokens at a remote chain's
* OriginalTokenVault, or mint at another remote chain
* NOTE: This function DOES NOT SUPPORT fee-on-transfer / rebasing tokens.
* @param _token The pegged token address.
* @param _amount The amount to burn.
* @param _toChainId If zero, withdraw from original vault; otherwise, the remote chain to mint tokens.
* @param _toAccount The account to receive tokens on the remote chain
* @param _nonce A number to guarantee unique depositId. Can be timestamp in practice.
*/
function burn(
address _token,
uint256 _amount,
uint64 _toChainId,
address _toAccount,
uint64 _nonce
) external whenNotPaused returns (bytes32) {
bytes32 burnId = _burn(_token, _amount, _toChainId, _toAccount, _nonce);
IPeggedToken(_token).burn(msg.sender, _amount);
return burnId;
}
// same with `burn` above, use openzeppelin ERC20Burnable interface
function burnFrom(
address _token,
uint256 _amount,
uint64 _toChainId,
address _toAccount,
uint64 _nonce
) external whenNotPaused returns (bytes32) {
bytes32 burnId = _burn(_token, _amount, _toChainId, _toAccount, _nonce);
IPeggedTokenBurnFrom(_token).burnFrom(msg.sender, _amount);
return burnId;
}
function _burn(
address _token,
uint256 _amount,
uint64 _toChainId,
address _toAccount,
uint64 _nonce
) private returns (bytes32) {
require(_amount > minBurn[_token], "amount too small");
require(maxBurn[_token] == 0 || _amount <= maxBurn[_token], "amount too large");
supplies[_token] -= _amount;
bytes32 burnId = keccak256(
// len = 20 + 20 + 32 + 8 + 20 + 8 + 8 + 20 = 136
abi.encodePacked(
msg.sender,
_token,
_amount,
_toChainId,
_toAccount,
_nonce,
uint64(block.chainid),
address(this)
)
);
require(records[burnId] == false, "record exists");
records[burnId] = true;
emit Burn(burnId, _token, msg.sender, _amount, _toChainId, _toAccount, _nonce);
return burnId;
}
function executeDelayedTransfer(bytes32 id) external whenNotPaused {
delayedTransfer memory transfer = _executeDelayedTransfer(id);
IPeggedToken(transfer.token).mint(transfer.receiver, transfer.amount);
}
function setMinBurn(address[] calldata _tokens, uint256[] calldata _amounts) external onlyGovernor {
require(_tokens.length == _amounts.length, "length mismatch");
for (uint256 i = 0; i < _tokens.length; i++) {
minBurn[_tokens[i]] = _amounts[i];
emit MinBurnUpdated(_tokens[i], _amounts[i]);
}
}
function setMaxBurn(address[] calldata _tokens, uint256[] calldata _amounts) external onlyGovernor {
require(_tokens.length == _amounts.length, "length mismatch");
for (uint256 i = 0; i < _tokens.length; i++) {
maxBurn[_tokens[i]] = _amounts[i];
emit MaxBurnUpdated(_tokens[i], _amounts[i]);
}
}
function setSupply(address _token, uint256 _supply) external onlyOwner {
supplies[_token] = _supply;
emit SupplyUpdated(_token, _supply);
}
function increaseSupply(address _token, uint256 _delta) external onlyOwner {
supplies[_token] += _delta;
emit SupplyUpdated(_token, supplies[_token]);
}
function decreaseSupply(address _token, uint256 _delta) external onlyOwner {
supplies[_token] -= _delta;
emit SupplyUpdated(_token, supplies[_token]);
}
}

./contracts/interfaces/IPeggedToken.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.0;
interface IPeggedToken {
function mint(address _to, uint256 _amount) external;
function burn(address _from, uint256 _amount) external;
}

./contracts/interfaces/IPeggedTokenBurnFrom.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.0;
// used for pegged token with openzeppelin ERC20Burnable interface
// only compatible with PeggedTokenBridgeV2
interface IPeggedTokenBurnFrom {
function mint(address _to, uint256 _amount) external;
function burnFrom(address _from, uint256 _amount) external;
}

./contracts/interfaces/ISigsVerifier.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.0;
interface ISigsVerifier {
/**
* @notice Verifies that a message is signed by a quorum among the signers.
* @param _msg signed message
* @param _sigs list of signatures sorted by signer addresses in ascending order
* @param _signers sorted list of current signers
* @param _powers powers of current signers
*/
function verifySigs(
bytes memory _msg,
bytes[] calldata _sigs,
address[] calldata _signers,
uint256[] calldata _powers
) external view;
}

./contracts/libraries/Pb.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
// runtime proto sol library
library Pb {
enum WireType {
Varint,
Fixed64,
LengthDelim,
StartGroup,
EndGroup,
Fixed32
}
struct Buffer {
uint256 idx; // the start index of next read. when idx=b.length, we're done
bytes b; // hold serialized proto msg, readonly
}
// create a new in-memory Buffer object from raw msg bytes
function fromBytes(bytes memory raw) internal pure returns (Buffer memory buf) {
buf.b = raw;
buf.idx = 0;
}
// whether there are unread bytes
function hasMore(Buffer memory buf) internal pure returns (bool) {
return buf.idx < buf.b.length;
}
// decode current field number and wiretype
function decKey(Buffer memory buf) internal pure returns (uint256 tag, WireType wiretype) {
uint256 v = decVarint(buf);
tag = v / 8;
wiretype = WireType(v & 7);
}
// count tag occurrences, return an array due to no memory map support
// have to create array for (maxtag+1) size. cnts[tag] = occurrences
// should keep buf.idx unchanged because this is only a count function
function cntTags(Buffer memory buf, uint256 maxtag) internal pure returns (uint256[] memory cnts) {
uint256 originalIdx = buf.idx;
cnts = new uint256[](maxtag + 1); // protobuf's tags are from 1 rather than 0
uint256 tag;
WireType wire;
while (hasMore(buf)) {
(tag, wire) = decKey(buf);
cnts[tag] += 1;
skipValue(buf, wire);
}
buf.idx = originalIdx;
}
// read varint from current buf idx, move buf.idx to next read, return the int value
function decVarint(Buffer memory buf) internal pure returns (uint256 v) {
bytes10 tmp; // proto int is at most 10 bytes (7 bits can be used per byte)
bytes memory bb = buf.b; // get buf.b mem addr to use in assembly
v = buf.idx; // use v to save one additional uint variable
assembly {
tmp := mload(add(add(bb, 32), v)) // load 10 bytes from buf.b[buf.idx] to tmp
}
uint256 b; // store current byte content
v = 0; // reset to 0 for return value
for (uint256 i = 0; i < 10; i++) {
assembly {
b := byte(i, tmp) // don't use tmp[i] because it does bound check and costs extra
}
v |= (b & 0x7F) << (i * 7);
if (b & 0x80 == 0) {
buf.idx += i + 1;
return v;
}
}
revert(); // i=10, invalid varint stream
}
// read length delimited field and return bytes
function decBytes(Buffer memory buf) internal pure returns (bytes memory b) {
uint256 len = decVarint(buf);
uint256 end = buf.idx + len;
require(end <= buf.b.length); // avoid overflow
b = new bytes(len);
bytes memory bufB = buf.b; // get buf.b mem addr to use in assembly
uint256 bStart;
uint256 bufBStart = buf.idx;
assembly {
bStart := add(b, 32)
bufBStart := add(add(bufB, 32), bufBStart)
}
for (uint256 i = 0; i < len; i += 32) {
assembly {
mstore(add(bStart, i), mload(add(bufBStart, i)))
}
}
buf.idx = end;
}
// return packed ints
function decPacked(Buffer memory buf) internal pure returns (uint256[] memory t) {
uint256 len = decVarint(buf);
uint256 end = buf.idx + len;
require(end <= buf.b.length); // avoid overflow
// array in memory must be init w/ known length
// so we have to create a tmp array w/ max possible len first
uint256[] memory tmp = new uint256[](len);
uint256 i = 0; // count how many ints are there
while (buf.idx < end) {
tmp[i] = decVarint(buf);
i++;
}
t = new uint256[](i); // init t with correct length
for (uint256 j = 0; j < i; j++) {
t[j] = tmp[j];
}
return t;
}
// move idx pass current value field, to beginning of next tag or msg end
function skipValue(Buffer memory buf, WireType wire) internal pure {
if (wire == WireType.Varint) {
decVarint(buf);
} else if (wire == WireType.LengthDelim) {
uint256 len = decVarint(buf);
buf.idx += len; // skip len bytes value data
require(buf.idx <= buf.b.length); // avoid overflow
} else {
revert();
} // unsupported wiretype
}
// type conversion help utils
function _bool(uint256 x) internal pure returns (bool v) {
return x != 0;
}
function _uint256(bytes memory b) internal pure returns (uint256 v) {
require(b.length <= 32); // b's length must be smaller than or equal to 32
assembly {
v := mload(add(b, 32))
} // load all 32bytes to v
v = v >> (8 * (32 - b.length)); // only first b.length is valid
}
function _address(bytes memory b) internal pure returns (address v) {
v = _addressPayable(b);
}
function _addressPayable(bytes memory b) internal pure returns (address payable v) {
require(b.length == 20);
//load 32bytes then shift right 12 bytes
assembly {
v := div(mload(add(b, 32)), 0x1000000000000000000000000)
}
}
function _bytes32(bytes memory b) internal pure returns (bytes32 v) {
require(b.length == 32);
assembly {
v := mload(add(b, 32))
}
}
// uint[] to uint8[]
function uint8s(uint256[] memory arr) internal pure returns (uint8[] memory t) {
t = new uint8[](arr.length);
for (uint256 i = 0; i < t.length; i++) {
t[i] = uint8(arr[i]);
}
}
function uint32s(uint256[] memory arr) internal pure returns (uint32[] memory t) {
t = new uint32[](arr.length);
for (uint256 i = 0; i < t.length; i++) {
t[i] = uint32(arr[i]);
}
}
function uint64s(uint256[] memory arr) internal pure returns (uint64[] memory t) {
t = new uint64[](arr.length);
for (uint256 i = 0; i < t.length; i++) {
t[i] = uint64(arr[i]);
}
}
function bools(uint256[] memory arr) internal pure returns (bool[] memory t) {
t = new bool[](arr.length);
for (uint256 i = 0; i < t.length; i++) {
t[i] = arr[i] != 0;
}
}
}

./contracts/libraries/PbPegged.sol

// SPDX-License-Identifier: GPL-3.0-only
// Code generated by protoc-gen-sol. DO NOT EDIT.
// source: contracts/libraries/proto/pegged.proto
pragma solidity 0.8.9;
import "./Pb.sol";
library PbPegged {
using Pb for Pb.Buffer; // so we can call Pb funcs on Buffer obj
struct Mint {
address token; // tag: 1
address account; // tag: 2
uint256 amount; // tag: 3
address depositor; // tag: 4
uint64 refChainId; // tag: 5
bytes32 refId; // tag: 6
} // end struct Mint
function decMint(bytes memory raw) internal pure returns (Mint memory m) {
Pb.Buffer memory buf = Pb.fromBytes(raw);
uint256 tag;
Pb.WireType wire;
while (buf.hasMore()) {
(tag, wire) = buf.decKey();
if (false) {}
// solidity has no switch/case
else if (tag == 1) {
m.token = Pb._address(buf.decBytes());
} else if (tag == 2) {
m.account = Pb._address(buf.decBytes());
} else if (tag == 3) {
m.amount = Pb._uint256(buf.decBytes());
} else if (tag == 4) {
m.depositor = Pb._address(buf.decBytes());
} else if (tag == 5) {
m.refChainId = uint64(buf.decVarint());
} else if (tag == 6) {
m.refId = Pb._bytes32(buf.decBytes());
} else {
buf.skipValue(wire);
} // skip value of unknown tag
}
} // end decoder Mint
struct Withdraw {
address token; // tag: 1
address receiver; // tag: 2
uint256 amount; // tag: 3
address burnAccount; // tag: 4
uint64 refChainId; // tag: 5
bytes32 refId; // tag: 6
} // end struct Withdraw
function decWithdraw(bytes memory raw) internal pure returns (Withdraw memory m) {
Pb.Buffer memory buf = Pb.fromBytes(raw);
uint256 tag;
Pb.WireType wire;
while (buf.hasMore()) {
(tag, wire) = buf.decKey();
if (false) {}
// solidity has no switch/case
else if (tag == 1) {
m.token = Pb._address(buf.decBytes());
} else if (tag == 2) {
m.receiver = Pb._address(buf.decBytes());
} else if (tag == 3) {
m.amount = Pb._uint256(buf.decBytes());
} else if (tag == 4) {
m.burnAccount = Pb._address(buf.decBytes());
} else if (tag == 5) {
m.refChainId = uint64(buf.decVarint());
} else if (tag == 6) {
m.refId = Pb._bytes32(buf.decBytes());
} else {
buf.skipValue(wire);
} // skip value of unknown tag
}
} // end decoder Withdraw
}

./contracts/safeguard/DelayedTransfer.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import "./Governor.sol";
abstract contract DelayedTransfer is Governor {
struct delayedTransfer {
address receiver;
address token;
uint256 amount;
uint256 timestamp;
}
mapping(bytes32 => delayedTransfer) public delayedTransfers;
mapping(address => uint256) public delayThresholds;
uint256 public delayPeriod; // in seconds
event DelayedTransferAdded(bytes32 id);
event DelayedTransferExecuted(bytes32 id, address receiver, address token, uint256 amount);
event DelayPeriodUpdated(uint256 period);
event DelayThresholdUpdated(address token, uint256 threshold);
function setDelayThresholds(address[] calldata _tokens, uint256[] calldata _thresholds) external onlyGovernor {
require(_tokens.length == _thresholds.length, "length mismatch");
for (uint256 i = 0; i < _tokens.length; i++) {
delayThresholds[_tokens[i]] = _thresholds[i];
emit DelayThresholdUpdated(_tokens[i], _thresholds[i]);
}
}
function setDelayPeriod(uint256 _period) external onlyGovernor {
delayPeriod = _period;
emit DelayPeriodUpdated(_period);
}
function _addDelayedTransfer(
bytes32 id,
address receiver,
address token,
uint256 amount
) internal {
require(delayedTransfers[id].timestamp == 0, "delayed transfer already exists");
delayedTransfers[id] = delayedTransfer({
receiver: receiver,
token: token,
amount: amount,
timestamp: block.timestamp
});
emit DelayedTransferAdded(id);
}
// caller needs to do the actual token transfer
function _executeDelayedTransfer(bytes32 id) internal returns (delayedTransfer memory) {
delayedTransfer memory transfer = delayedTransfers[id];
require(transfer.timestamp > 0, "delayed transfer not exist");
require(block.timestamp > transfer.timestamp + delayPeriod, "delayed transfer still locked");
delete delayedTransfers[id];
emit DelayedTransferExecuted(id, transfer.receiver, transfer.token, transfer.amount);
return transfer;
}
}

./contracts/safeguard/Governor.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import "./Ownable.sol";
abstract contract Governor is Ownable {
mapping(address => bool) public governors;
event GovernorAdded(address account);
event GovernorRemoved(address account);
modifier onlyGovernor() {
require(isGovernor(msg.sender), "Caller is not governor");
_;
}
constructor() {
_addGovernor(msg.sender);
}
function isGovernor(address _account) public view returns (bool) {
return governors[_account];
}
function addGovernor(address _account) public onlyOwner {
_addGovernor(_account);
}
function removeGovernor(address _account) public onlyOwner {
_removeGovernor(_account);
}
function renounceGovernor() public {
_removeGovernor(msg.sender);
}
function _addGovernor(address _account) private {
require(!isGovernor(_account), "Account is already governor");
governors[_account] = true;
emit GovernorAdded(_account);
}
function _removeGovernor(address _account) private {
require(isGovernor(_account), "Account is not governor");
governors[_account] = false;
emit GovernorRemoved(_account);
}
}

./contracts/safeguard/Ownable.sol

// SPDX-License-Identifier: GPL-3.0-only
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.
*
* This adds a normal func that setOwner if _owner is address(0). So we can't allow
* renounceOwnership. So we can support Proxy based upgradable contract
*/
abstract contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(msg.sender);
}
/**
* @dev Only to be called by inherit contracts, in their init func called by Proxy
* we require _owner == address(0), which is only possible when it's a delegateCall
* because constructor sets _owner in contract state.
*/
function initOwner() internal {
require(_owner == address(0), "owner already set");
_setOwner(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");
_;
}
/**
* @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);
}
}

./contracts/safeguard/Pauser.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import "@openzeppelin/contracts/security/Pausable.sol";
import "./Ownable.sol";
abstract contract Pauser is Ownable, Pausable {
mapping(address => bool) public pausers;
event PauserAdded(address account);
event PauserRemoved(address account);
constructor() {
_addPauser(msg.sender);
}
modifier onlyPauser() {
require(isPauser(msg.sender), "Caller is not pauser");
_;
}
function pause() public onlyPauser {
_pause();
}
function unpause() public onlyPauser {
_unpause();
}
function isPauser(address account) public view returns (bool) {
return pausers[account];
}
function addPauser(address account) public onlyOwner {
_addPauser(account);
}
function removePauser(address account) public onlyOwner {
_removePauser(account);
}
function renouncePauser() public {
_removePauser(msg.sender);
}
function _addPauser(address account) private {
require(!isPauser(account), "Account is already pauser");
pausers[account] = true;
emit PauserAdded(account);
}
function _removePauser(address account) private {
require(isPauser(account), "Account is not pauser");
pausers[account] = false;
emit PauserRemoved(account);
}
}

./contracts/safeguard/VolumeControl.sol

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import "./Governor.sol";
abstract contract VolumeControl is Governor {
uint256 public epochLength; // seconds
mapping(address => uint256) public epochVolumes; // key is token
mapping(address => uint256) public epochVolumeCaps; // key is token
mapping(address => uint256) public lastOpTimestamps; // key is token
event EpochLengthUpdated(uint256 length);
event EpochVolumeUpdated(address token, uint256 cap);
function setEpochLength(uint256 _length) external onlyGovernor {
epochLength = _length;
emit EpochLengthUpdated(_length);
}
function setEpochVolumeCaps(address[] calldata _tokens, uint256[] calldata _caps) external onlyGovernor {
require(_tokens.length == _caps.length, "length mismatch");
for (uint256 i = 0; i < _tokens.length; i++) {
epochVolumeCaps[_tokens[i]] = _caps[i];
emit EpochVolumeUpdated(_tokens[i], _caps[i]);
}
}
function _updateVolume(address _token, uint256 _amount) internal {
if (epochLength == 0) {
return;
}
uint256 cap = epochVolumeCaps[_token];
if (cap == 0) {
return;
}
uint256 volume = epochVolumes[_token];
uint256 timestamp = block.timestamp;
uint256 epochStartTime = (timestamp / epochLength) * epochLength;
if (lastOpTimestamps[_token] < epochStartTime) {
volume = _amount;
} else {
volume += _amount;
}
require(volume <= cap, "volume exceeds cap");
epochVolumes[_token] = volume;
lastOpTimestamps[_token] = timestamp;
}
}

@openzeppelin/contracts/security/Pausable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}

@openzeppelin/contracts/utils/Context.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
}
}

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_sigsVerifier","internalType":"contract ISigsVerifier"}]},{"type":"event","name":"Burn","inputs":[{"type":"bytes32","name":"burnId","internalType":"bytes32","indexed":false},{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"address","name":"account","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint64","name":"toChainId","internalType":"uint64","indexed":false},{"type":"address","name":"toAccount","internalType":"address","indexed":false},{"type":"uint64","name":"nonce","internalType":"uint64","indexed":false}],"anonymous":false},{"type":"event","name":"DelayPeriodUpdated","inputs":[{"type":"uint256","name":"period","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"DelayThresholdUpdated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"threshold","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"DelayedTransferAdded","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"DelayedTransferExecuted","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32","indexed":false},{"type":"address","name":"receiver","internalType":"address","indexed":false},{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"EpochLengthUpdated","inputs":[{"type":"uint256","name":"length","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"EpochVolumeUpdated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"cap","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"GovernorAdded","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"GovernorRemoved","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"MaxBurnUpdated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"MinBurnUpdated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Mint","inputs":[{"type":"bytes32","name":"mintId","internalType":"bytes32","indexed":false},{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"address","name":"account","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint64","name":"refChainId","internalType":"uint64","indexed":false},{"type":"bytes32","name":"refId","internalType":"bytes32","indexed":false},{"type":"address","name":"depositor","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Paused","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"PauserAdded","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"PauserRemoved","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"SupplyUpdated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"supply","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Unpaused","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addGovernor","inputs":[{"type":"address","name":"_account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addPauser","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"burn","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"uint64","name":"_toChainId","internalType":"uint64"},{"type":"address","name":"_toAccount","internalType":"address"},{"type":"uint64","name":"_nonce","internalType":"uint64"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"burnFrom","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"uint64","name":"_toChainId","internalType":"uint64"},{"type":"address","name":"_toAccount","internalType":"address"},{"type":"uint64","name":"_nonce","internalType":"uint64"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"decreaseSupply","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_delta","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"delayPeriod","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"delayThresholds","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"receiver","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"timestamp","internalType":"uint256"}],"name":"delayedTransfers","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"epochLength","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"epochVolumeCaps","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"epochVolumes","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"executeDelayedTransfer","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"governors","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"increaseSupply","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_delta","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isGovernor","inputs":[{"type":"address","name":"_account","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isPauser","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastOpTimestamps","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"maxBurn","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"minBurn","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"mint","inputs":[{"type":"bytes","name":"_request","internalType":"bytes"},{"type":"bytes[]","name":"_sigs","internalType":"bytes[]"},{"type":"address[]","name":"_signers","internalType":"address[]"},{"type":"uint256[]","name":"_powers","internalType":"uint256[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"pause","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"paused","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"pausers","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"records","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeGovernor","inputs":[{"type":"address","name":"_account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removePauser","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceGovernor","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renouncePauser","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setDelayPeriod","inputs":[{"type":"uint256","name":"_period","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setDelayThresholds","inputs":[{"type":"address[]","name":"_tokens","internalType":"address[]"},{"type":"uint256[]","name":"_thresholds","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setEpochLength","inputs":[{"type":"uint256","name":"_length","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setEpochVolumeCaps","inputs":[{"type":"address[]","name":"_tokens","internalType":"address[]"},{"type":"uint256[]","name":"_caps","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setMaxBurn","inputs":[{"type":"address[]","name":"_tokens","internalType":"address[]"},{"type":"uint256[]","name":"_amounts","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setMinBurn","inputs":[{"type":"address[]","name":"_tokens","internalType":"address[]"},{"type":"uint256[]","name":"_amounts","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setSupply","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_supply","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract ISigsVerifier"}],"name":"sigsVerifier","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"supplies","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unpause","inputs":[]}]
            

Contract Creation Code

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