Contract
Contract Overview
Balance:
0 MATIC
My Name Tag:
Not Available
| Txn Hash |
Method
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Block
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From
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To
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Value | [Txn Fee] | |||
|---|---|---|---|---|---|---|---|---|---|
| 0xc2f543cc2ab374a650e314a5d43ad8831f6f06d5b5fff43ad79420ff0a799799 | 0x60806040 | 31489662 | 247 days 21 hrs ago | 0x1de72a1935df9b4e02315bda3c3cdbdf2a640583 | IN | Contract Creation | 0 MATIC | 0.005086843601 |
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Similar Match Source Code This contract matches the deployed ByteCode of the Source Code for Contract 0x23894f3C8184F8127a2369e16284A0f7Ff2D765D The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
CCTransferRouter
Compiler Version
v0.8.2+commit.661d1103
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "../libraries/RequestHelper.sol";
import "../libraries/BitcoinHelper.sol";
import "./interfaces/ICCTransferRouter.sol";
import "../erc20/interfaces/ITeleBTC.sol";
import "../relay/interfaces/IBitcoinRelay.sol";
import "./interfaces/IInstantRouter.sol";
import "../lockers/interfaces/ILockers.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract CCTransferRouter is ICCTransferRouter, Ownable, ReentrancyGuard {
modifier nonZeroAddress(address _address) {
require(_address != address(0), "CCTransferRouter: address is zero");
_;
}
// Constants
uint constant MAX_PROTOCOL_FEE = 10000;
// Public variables
uint public override startingBlockNumber;
uint public override chainId;
uint public override appId;
uint public override protocolPercentageFee; // A number between 0 to 10000
address public override relay;
address public override lockers;
address public override teleBTC;
address public override instantRouter;
address public override treasury;
mapping(bytes32 => ccTransferRequest) public ccTransferRequests; // TxId to CCTransferRequest structure
/// @notice Gives default params to initiate cc transfer router
/// @param _startingBlockNumber Requests that are included in a block older than _startingBlockNumber cannot be executed
/// @param _protocolPercentageFee Percentage amount of protocol fee (min: %0.01)
/// @param _chainId Id of the underlying chain
/// @param _appId Id of ccTransfer dApp
/// @param _relay The Relay address to validate data from source chain
/// @param _lockers Lockers' contract address
/// @param _teleBTC TeleportDAO BTC ERC20 token address
/// @param _treasury Address of treasury that collects protocol fees
constructor(
uint _startingBlockNumber,
uint _protocolPercentageFee,
uint _chainId,
uint _appId,
address _relay,
address _lockers,
address _teleBTC,
address _treasury
) {
startingBlockNumber = _startingBlockNumber;
chainId = _chainId;
appId = _appId;
_setProtocolPercentageFee(_protocolPercentageFee);
_setRelay(_relay);
_setLockers(_lockers);
_setTeleBTC(_teleBTC);
_setTreasury(_treasury);
}
function renounceOwnership() public virtual override onlyOwner {}
/// @notice Setter for protocol percentage fee
/// @dev Only owner can call this
/// @param _protocolPercentageFee Percentage amount of protocol fee
function setProtocolPercentageFee(uint _protocolPercentageFee) external override onlyOwner {
_setProtocolPercentageFee(_protocolPercentageFee);
}
/// @notice Setter for relay
/// @dev Only owner can call this
/// @param _relay Address of the relay contract
function setRelay(address _relay) external override nonZeroAddress(_relay) onlyOwner {
_setRelay(_relay);
}
/// @notice Setter for lockers
/// @dev Only owner can call this
/// @param _lockers Address of the lockers contract
function setLockers(address _lockers) external override nonZeroAddress(_lockers) onlyOwner {
_setLockers(_lockers);
}
/// @notice Setter for instant router
/// @dev Only owner can call this
/// @param _instantRouter Address of the instant router contract
function setInstantRouter(address _instantRouter) external override nonZeroAddress(_instantRouter) onlyOwner {
_setInstantRouter(_instantRouter);
}
/// @notice Setter for teleBTC
/// @dev Only owner can call this
/// @param _teleBTC TeleportDAO BTC ERC20 token address
function setTeleBTC(address _teleBTC) external override nonZeroAddress(_teleBTC) onlyOwner {
_setTeleBTC(_teleBTC);
}
/// @notice Setter for treasury
/// @dev Only owner can call this
/// @param _treasury Treasury address
function setTreasury(address _treasury) external override nonZeroAddress(_treasury) onlyOwner {
_setTreasury(_treasury);
}
/// @notice Internal setter for protocol percentage fee
/// @param _protocolPercentageFee Percentage amount of protocol fee
function _setProtocolPercentageFee(uint _protocolPercentageFee) private {
require(
MAX_PROTOCOL_FEE >= _protocolPercentageFee,
"CCTransferRouter: protocol fee is out of range"
);
emit NewProtocolPercentageFee(protocolPercentageFee, _protocolPercentageFee);
protocolPercentageFee = _protocolPercentageFee;
}
/// @notice Internal setter for relay
/// @param _relay Address of the relay contract
function _setRelay(address _relay) private nonZeroAddress(_relay) {
emit NewRelay(relay, _relay);
relay = _relay;
}
/// @notice Internal setter for relay
/// @param _lockers Address of the lockers contract
function _setLockers(address _lockers) private nonZeroAddress(_lockers) {
emit NewLockers(lockers, _lockers);
lockers = _lockers;
}
/// @notice Internal setter for instant router
/// @param _instantRouter Address of the instant router contract
function _setInstantRouter(address _instantRouter) private nonZeroAddress(_instantRouter) {
emit NewInstantRouter(instantRouter, _instantRouter);
instantRouter = _instantRouter;
}
/// @notice Internal setter for teleBTC
/// @param _teleBTC TeleportDAO BTC ERC20 token address
function _setTeleBTC(address _teleBTC) private nonZeroAddress(_teleBTC) {
emit NewTeleBTC(teleBTC, _teleBTC);
teleBTC = _teleBTC;
}
/// @notice Internal setter for treasury
/// @param _treasury Treasury address
function _setTreasury(address _treasury) private nonZeroAddress(_treasury) {
emit NewTreasury(treasury, _treasury);
treasury = _treasury;
}
/// @notice Check if the request has been executed before
/// @dev This is to avoid re-submitting a used request
/// @param _txId The txId of request on the source chain
/// @return True if the request has been executed
function isRequestUsed(bytes32 _txId) external view override returns (bool) {
return ccTransferRequests[_txId].isUsed ? true : false;
}
/// @notice Executes the cross chain transfer request
/// @dev Validates the transfer request, then,
/// if speed is 1, the request is instant
/// which pays back the loan,
/// if the speed is 0, it is a normal transfer
/// @param _version Version of the Bitcoin transaction
/// @param _vin Transaction inputs
/// @param _vout Transaction outputs
/// @param _locktime Bitcoin transaction locktime
/// @param _blockNumber The block number of the request tx
/// @param _intermediateNodes Merkle proof for tx
/// @param _index Index of tx in the block
/// @param _lockerLockingScript Locking script of locker that user has sent BTC to it
/// @return True if the transfer is successful
function ccTransfer(
// Bitcoin tx
bytes4 _version,
bytes memory _vin,
bytes calldata _vout,
bytes4 _locktime,
// Bitcoin block number
uint256 _blockNumber,
// Merkle proof
bytes calldata _intermediateNodes,
uint _index,
bytes calldata _lockerLockingScript
) external payable nonReentrant override returns (bool) {
require(_blockNumber >= startingBlockNumber, "CCTransferRouter: request is too old");
// Finds txId on the source chain
bytes32 txId = BitcoinHelper.calculateTxId(_version, _vin, _vout, _locktime);
require(
!ccTransferRequests[txId].isUsed,
"CCTransferRouter: request has been used before"
);
require(_locktime == bytes4(0), "CCTransferRouter: lock time is non -zero");
// Extracts information from the request
_saveCCTransferRequest(_lockerLockingScript, _vout, txId);
// Checks if tx has been confirmed on source chain
require(
_isConfirmed(
txId,
_blockNumber,
_intermediateNodes,
_index
),
"CCTransferRouter: transaction has not been finalized yet"
);
// Normal cc transfer request
if (ccTransferRequests[txId].speed == 0) {
(uint receivedAmount, uint _protocolFee, uint _teleporterFee) = _sendTeleBTC(_lockerLockingScript, txId);
emit CCTransfer(
_lockerLockingScript,
0,
ILockers(lockers).getLockerTargetAddress(_lockerLockingScript),
ccTransferRequests[txId].recipientAddress,
ccTransferRequests[txId].inputAmount,
receivedAmount,
ccTransferRequests[txId].speed,
_msgSender(),
_teleporterFee,
0,
_protocolFee,
txId
);
return true;
} else {
// Pays back instant loan (ccTransferRequests[txId].speed == 1)
(uint receivedAmount, uint _protocolFee, uint _teleporterFee) = _payBackInstantLoan(_lockerLockingScript, txId);
emit CCTransfer(
_lockerLockingScript,
0,
ILockers(lockers).getLockerTargetAddress(_lockerLockingScript),
ccTransferRequests[txId].recipientAddress,
ccTransferRequests[txId].inputAmount,
receivedAmount,
ccTransferRequests[txId].speed,
_msgSender(),
_teleporterFee,
0,
_protocolFee,
txId
);
return true;
}
}
/// @notice Sends minted teleBTC to the user
/// @param _lockerLockingScript Locker's locking script
/// @param _txId The transaction ID of the request
/// @return _remainedAmount Amount of teleBTC that user receives after reducing fees
function _sendTeleBTC(bytes memory _lockerLockingScript, bytes32 _txId) private returns (
uint _remainedAmount,
uint _protocolFee,
uint _teleporterFee
) {
// Gets remained amount after reducing fees
(_remainedAmount, _protocolFee, _teleporterFee) = _mintAndReduceFees(_lockerLockingScript, _txId);
// Transfers rest of tokens to recipient
ITeleBTC(teleBTC).transfer(
ccTransferRequests[_txId].recipientAddress,
_remainedAmount
);
}
/// @notice Executes the paying back instant loan request
/// @param _lockerLockingScript Locker's locking script
/// @param _txId The transaction ID of the request
/// @return _remainedAmount Amount of teleBTC that user receives after reducing fees
function _payBackInstantLoan(
bytes memory _lockerLockingScript,
bytes32 _txId
) private returns (uint _remainedAmount, uint _protocolFee, uint _teleporterFee) {
// Gets remained amount after reducing fees
(_remainedAmount, _protocolFee, _teleporterFee) = _mintAndReduceFees(_lockerLockingScript, _txId);
// Gives allowance to instant router to transfer remained teleBTC
ITeleBTC(teleBTC).approve(
instantRouter,
_remainedAmount
);
// Pays back instant loan
IInstantRouter(instantRouter).payBackLoan(
ccTransferRequests[_txId].recipientAddress,
_remainedAmount
);
}
/// @notice Parses and saves the request
/// @dev Checks that user has sent BTC to a valid locker
/// @param _lockerLockingScript Locker's locking script
/// @param _vout The outputs of the tx
/// @param _txId The txID of the request
function _saveCCTransferRequest(
bytes memory _lockerLockingScript,
bytes memory _vout,
bytes32 _txId
) private {
require(
ILockers(lockers).isLocker(_lockerLockingScript),
"CCTransferRouter: no locker with the given locking script exists"
);
// Extracts value and opreturn data from request
ccTransferRequest memory request; // Defines it to save gas
bytes memory arbitraryData;
(request.inputAmount, arbitraryData) = BitcoinHelper.parseValueAndDataHavingLockingScriptSmallPayload(
_vout,
_lockerLockingScript
);
// Checks that input amount is not zero
require(request.inputAmount > 0, "CCTransferRouter: input amount is zero");
// Checks chain id and app id
require(RequestHelper.parseChainId(arbitraryData) == chainId, "CCTransferRouter: chain id is not correct");
require(RequestHelper.parseAppId(arbitraryData) == appId, "CCTransferRouter: app id is not correct");
// Calculates fee
uint percentageFee = RequestHelper.parsePercentageFee(arbitraryData);
require(percentageFee <= MAX_PROTOCOL_FEE, "CCTransferRouter: percentage fee is out of range");
request.fee = percentageFee*request.inputAmount/MAX_PROTOCOL_FEE;
// Parses recipient address and request speed
request.recipientAddress = RequestHelper.parseRecipientAddress(arbitraryData);
request.speed = RequestHelper.parseSpeed(arbitraryData);
require(request.speed == 0 || request.speed == 1, "CCTransferRouter: speed is out of range");
// Marks the request as used
request.isUsed = true;
// Saves the request data
ccTransferRequests[_txId] = request;
}
/// @notice Checks if tx has been finalized on source chain
/// @dev Pays relay fee using included ETH in the transaction
/// @param _txId The request tx
/// @param _blockNumber The block number of the tx
/// @param _intermediateNodes Merkle proof for tx
/// @param _index Index of tx in the block
/// @return True if the tx is finalized on the source chain
function _isConfirmed(
bytes32 _txId,
uint256 _blockNumber,
bytes memory _intermediateNodes,
uint _index
) private returns (bool) {
// Calculates fee amount
uint feeAmount = IBitcoinRelay(relay).getBlockHeaderFee(_blockNumber, 0); // Index 0 is for finalized blocks
require(msg.value >= feeAmount, "CCTransferRouter: paid fee is not sufficient");
// Calls relay contract (transfers all msg.value to it)
bytes memory data = Address.functionCallWithValue(
relay,
abi.encodeWithSignature(
"checkTxProof(bytes32,uint256,bytes,uint256)",
_txId,
_blockNumber,
_intermediateNodes,
_index
),
feeAmount
);
// Sends extra ETH back to _msgSender()
Address.sendValue(payable(_msgSender()), msg.value - feeAmount);
return abi.decode(data, (bool));
}
/// @notice Mints teleBTC by calling lockers contract
/// @param _lockerLockingScript Locker's locking script
/// @param _txId The transaction ID of the request
/// @return _remainedAmount Amount of teleBTC that user receives after reducing all fees (protocol, locker, teleporter)
function _mintAndReduceFees(
bytes memory _lockerLockingScript,
bytes32 _txId
) private returns (uint _remainedAmount, uint _protocolFee, uint _teleporterFee) {
// Mints teleBTC for cc transfer router
// Lockers contract gets locker's fee
uint mintedAmount = ILockers(lockers).mint(
_lockerLockingScript,
address(this),
ccTransferRequests[_txId].inputAmount
);
// Calculates fees
_protocolFee = ccTransferRequests[_txId].inputAmount*protocolPercentageFee/MAX_PROTOCOL_FEE;
_teleporterFee = ccTransferRequests[_txId].fee;
// Pays Teleporter fee
if (_teleporterFee > 0) {
ITeleBTC(teleBTC).transfer(_msgSender(), _teleporterFee);
}
// Pays protocol fee
if (_protocolFee > 0) {
ITeleBTC(teleBTC).transfer(treasury, _protocolFee);
}
_remainedAmount = mintedAmount - _protocolFee - _teleporterFee;
}
receive() external payable {}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
// A library for parsing cc transfer and cc exchange requests
library RequestHelper {
/// @notice Returns chain id of the request
/// @dev Determines the chain that request belongs to
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of chain id
function parseChainId(bytes memory _arbitraryData) internal pure returns (uint8 parsedValue) {
bytes memory slicedBytes = sliceBytes(_arbitraryData, 0, 0);
assembly {
parsedValue := mload(add(slicedBytes, 1))
}
}
/// @notice Returns app id of the request
/// @dev Determines the app that request belongs to (e.g. cross-chain transfer app id is 0)
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of app id
function parseAppId(bytes memory _arbitraryData) internal pure returns (uint16 parsedValue) {
bytes memory slicedBytes = sliceBytes(_arbitraryData, 1, 2);
assembly {
parsedValue := mload(add(slicedBytes, 2))
}
}
/// @notice Returns recipient address
/// @dev Minted TeleBTC or exchanged tokens will be sent to this address
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of recipient address
function parseRecipientAddress(bytes memory _arbitraryData) internal pure returns (address parsedValue) {
bytes memory slicedBytes = sliceBytes(_arbitraryData, 3, 22);
assembly {
parsedValue := mload(add(slicedBytes, 20))
}
}
/// @notice Returns percentage fee (from total minted TeleBTC)
/// @dev This fee goes to Teleporter who submitted the request
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of percentage fee
function parsePercentageFee(bytes memory _arbitraryData) internal pure returns (uint16 parsedValue) {
bytes memory slicedBytes = sliceBytes(_arbitraryData, 23, 24);
assembly {
parsedValue := mload(add(slicedBytes, 2))
}
}
/// @notice Returns speed of request
/// @dev 0 for normal requests, 1 for instant requests
/// Instant requests are used to pay back an instant loan
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of speed parameter
function parseSpeed(bytes memory _arbitraryData) internal pure returns (uint8 parsedValue) {
bytes memory slicedBytes = sliceBytes(_arbitraryData, 25, 25);
assembly {
parsedValue := mload(add(slicedBytes, 1))
}
}
/// @notice Returns address of exchange token
/// @dev Minted TeleBTC will be exchanged to this token
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of exchange token
function parseExchangeToken(bytes memory _arbitraryData) internal pure returns (address parsedValue){
bytes memory slicedBytes = sliceBytes(_arbitraryData, 26, 45);
assembly {
parsedValue := mload(add(slicedBytes, 20))
}
}
/// @notice Returns amount of output (exchange) token
/// @dev If input token is fixed, outputAmount means the min expected output amount
/// If output token is fixed, outputAmount is desired output amount
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of exchange output amount
function parseExchangeOutputAmount(bytes memory _arbitraryData) internal pure returns (uint224 parsedValue){
bytes memory slicedBytes = sliceBytes(_arbitraryData, 46, 73);
assembly {
parsedValue := mload(add(slicedBytes, 28))
}
}
/// @notice Returns deadline of executing exchange request
/// @dev This value is compared to block.timestamp
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of deadline
function parseDeadline(bytes memory _arbitraryData) internal pure returns (uint32 parsedValue){
bytes memory slicedBytes = sliceBytes(_arbitraryData, 74, 77);
assembly {
parsedValue := mload(add(slicedBytes, 4))
}
}
/// @notice Returns true if input token is fixed
/// @param _arbitraryData Data written in Bitcoin tx
/// @return parsedValue The parsed value of is-fixed-token
function parseIsFixedToken(bytes memory _arbitraryData) internal pure returns (uint8 parsedValue){
bytes memory slicedBytes = sliceBytes(_arbitraryData, 78, 78);
assembly {
parsedValue := mload(add(slicedBytes, 1))
}
}
/// @notice Returns a sliced bytes
/// @param _data Data that is sliced
/// @param _start Start index of slicing
/// @param _end End index of slicing
/// @return _result The result of slicing
function sliceBytes(
bytes memory _data,
uint _start,
uint _end
) internal pure returns (bytes memory _result) {
bytes1 temp;
for (uint i = _start; i < _end + 1; i++) {
temp = _data[i];
_result = abi.encodePacked(_result, temp);
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "./TypedMemView.sol";
import "../types/ScriptTypesEnum.sol";
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
library BitcoinHelper {
using SafeCast for uint96;
using SafeCast for uint256;
using TypedMemView for bytes;
using TypedMemView for bytes29;
// The target at minimum Difficulty. Also the target of the genesis block
uint256 internal constant DIFF1_TARGET = 0xffff0000000000000000000000000000000000000000000000000000;
uint256 internal constant RETARGET_PERIOD = 2 * 7 * 24 * 60 * 60; // 2 weeks in seconds
uint256 internal constant RETARGET_PERIOD_BLOCKS = 2016; // 2 weeks in blocks
enum BTCTypes {
Unknown, // 0x0
CompactInt, // 0x1
ScriptSig, // 0x2 - with length prefix
Outpoint, // 0x3
TxIn, // 0x4
IntermediateTxIns, // 0x5 - used in vin parsing
Vin, // 0x6
ScriptPubkey, // 0x7 - with length prefix
PKH, // 0x8 - the 20-byte payload digest
WPKH, // 0x9 - the 20-byte payload digest
WSH, // 0xa - the 32-byte payload digest
SH, // 0xb - the 20-byte payload digest
OpReturnPayload, // 0xc
TxOut, // 0xd
IntermediateTxOuts, // 0xe - used in vout parsing
Vout, // 0xf
Header, // 0x10
HeaderArray, // 0x11
MerkleNode, // 0x12
MerkleStep, // 0x13
MerkleArray // 0x14
}
/// @notice requires `memView` to be of a specified type
/// @dev passes if it is the correct type, errors if not
/// @param memView a 29-byte view with a 5-byte type
/// @param t the expected type (e.g. BTCTypes.Outpoint, BTCTypes.TxIn, etc)
modifier typeAssert(bytes29 memView, BTCTypes t) {
memView.assertType(uint40(t));
_;
}
// Revert with an error message re: non-minimal VarInts
function revertNonMinimal(bytes29 ref) private pure returns (string memory) {
(, uint256 g) = TypedMemView.encodeHex(ref.indexUint(0, ref.len().toUint8()));
string memory err = string(
abi.encodePacked(
"Non-minimal var int. Got 0x",
uint144(g)
)
);
revert(err);
}
/// @notice reads a compact int from the view at the specified index
/// @param memView a 29-byte view with a 5-byte type
/// @param _index the index
/// @return number returns the compact int at the specified index
function indexCompactInt(bytes29 memView, uint256 _index) internal pure returns (uint64 number) {
uint256 flag = memView.indexUint(_index, 1);
if (flag <= 0xfc) {
return flag.toUint64();
} else if (flag == 0xfd) {
number = memView.indexLEUint(_index + 1, 2).toUint64();
if (compactIntLength(number) != 3) {revertNonMinimal(memView.slice(_index, 3, 0));}
} else if (flag == 0xfe) {
number = memView.indexLEUint(_index + 1, 4).toUint64();
if (compactIntLength(number) != 5) {revertNonMinimal(memView.slice(_index, 5, 0));}
} else if (flag == 0xff) {
number = memView.indexLEUint(_index + 1, 8).toUint64();
if (compactIntLength(number) != 9) {revertNonMinimal(memView.slice(_index, 9, 0));}
}
}
/// @notice gives the total length (in bytes) of a CompactInt-encoded number
/// @param number the number as uint64
/// @return the compact integer length as uint8
function compactIntLength(uint64 number) private pure returns (uint8) {
if (number <= 0xfc) {
return 1;
} else if (number <= 0xffff) {
return 3;
} else if (number <= 0xffffffff) {
return 5;
} else {
return 9;
}
}
/// @notice extracts the LE txid from an outpoint
/// @param _outpoint the outpoint
/// @return the LE txid
function txidLE(bytes29 _outpoint) internal pure typeAssert(_outpoint, BTCTypes.Outpoint) returns (bytes32) {
return _outpoint.index(0, 32);
}
/// @notice Calculates the required transaction Id from the transaction details
/// @dev Calculates the hash of transaction details two consecutive times
/// @param _version Version of the transaction
/// @param _vin Inputs of the transaction
/// @param _vout Outputs of the transaction
/// @param _locktime Lock time of the transaction
/// @return Transaction Id of the transaction (in LE form)
function calculateTxId(
bytes4 _version,
bytes memory _vin,
bytes memory _vout,
bytes4 _locktime
) internal pure returns (bytes32) {
bytes32 inputHash1 = sha256(abi.encodePacked(_version, _vin, _vout, _locktime));
bytes32 inputHash2 = sha256(abi.encodePacked(inputHash1));
return inputHash2;
}
/// @notice Reverts a Bytes32 input
/// @param _input Bytes32 input that we want to revert
/// @return Reverted bytes32
function reverseBytes32(bytes32 _input) private pure returns (bytes32) {
bytes memory temp;
bytes32 result;
for (uint i = 0; i < 32; i++) {
temp = abi.encodePacked(temp, _input[31-i]);
}
assembly {
result := mload(add(temp, 32))
}
return result;
}
/// @notice Parses outpoint info from an input
/// @dev Reverts if vin is null
/// @param _vin The vin of a Bitcoin transaction
/// @param _index Index of the input that we are looking at
/// @return _txId Output tx id
/// @return _outputIndex Output tx index
function extractOutpoint(
bytes memory _vin,
uint _index
) internal pure returns (bytes32 _txId, uint _outputIndex) {
bytes29 vin = tryAsVin(_vin.ref(uint40(BTCTypes.Unknown)));
require(!vin.isNull(), "BitcoinHelper: vin is null");
bytes29 input = indexVin(vin, _index);
bytes29 _outpoint = outpoint(input);
_txId = txidLE(_outpoint);
_outputIndex = outpointIdx(_outpoint);
}
/// @notice extracts the index as an integer from the outpoint
/// @param _outpoint the outpoint
/// @return the index
function outpointIdx(bytes29 _outpoint) internal pure typeAssert(_outpoint, BTCTypes.Outpoint) returns (uint32) {
return _outpoint.indexLEUint(32, 4).toUint32();
}
/// @notice extracts the outpoint from an input
/// @param _input the input
/// @return the outpoint as a typed memory
function outpoint(bytes29 _input) internal pure typeAssert(_input, BTCTypes.TxIn) returns (bytes29) {
return _input.slice(0, 36, uint40(BTCTypes.Outpoint));
}
/// @notice extracts the script sig from an input
/// @param _input the input
/// @return the script sig as a typed memory
function scriptSig(bytes29 _input) internal pure typeAssert(_input, BTCTypes.TxIn) returns (bytes29) {
uint64 scriptLength = indexCompactInt(_input, 36);
return _input.slice(36, compactIntLength(scriptLength) + scriptLength, uint40(BTCTypes.ScriptSig));
}
/// @notice determines the length of the first input in an array of inputs
/// @param _inputs the vin without its length prefix
/// @return the input length
function inputLength(bytes29 _inputs) private pure typeAssert(_inputs, BTCTypes.IntermediateTxIns) returns (uint256) {
uint64 scriptLength = indexCompactInt(_inputs, 36);
return uint256(compactIntLength(scriptLength)) + uint256(scriptLength) + 36 + 4;
}
/// @notice extracts the input at a specified index
/// @param _vin the vin
/// @param _index the index of the desired input
/// @return the desired input
function indexVin(bytes29 _vin, uint256 _index) internal pure typeAssert(_vin, BTCTypes.Vin) returns (bytes29) {
uint256 _nIns = uint256(indexCompactInt(_vin, 0));
uint256 _viewLen = _vin.len();
require(_index < _nIns, "Vin read overrun");
uint256 _offset = uint256(compactIntLength(uint64(_nIns)));
bytes29 _remaining;
for (uint256 _i = 0; _i < _index; _i += 1) {
_remaining = _vin.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxIns));
_offset += inputLength(_remaining);
}
_remaining = _vin.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxIns));
uint256 _len = inputLength(_remaining);
return _vin.slice(_offset, _len, uint40(BTCTypes.TxIn));
}
/// @notice extracts the value from an output
/// @param _output the output
/// @return the value
function value(bytes29 _output) internal pure typeAssert(_output, BTCTypes.TxOut) returns (uint64) {
return _output.indexLEUint(0, 8).toUint64();
}
/// @notice Finds total outputs value
/// @dev Reverts if vout is null
/// @param _vout The vout of a Bitcoin transaction
/// @return _totalValue Total vout value
function parseOutputsTotalValue(bytes memory _vout) internal pure returns (uint64 _totalValue) {
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!voutView.isNull(), "BitcoinHelper: vout is null");
bytes29 output;
// Finds total number of outputs
uint _numberOfOutputs = uint256(indexCompactInt(voutView, 0));
for (uint index = 0; index < _numberOfOutputs; index++) {
output = indexVout(voutView, index);
_totalValue = _totalValue + value(output);
}
}
/// @notice Parses the BTC amount that has been sent to
/// a specific script in a specific output
/// @param _vout The vout of a Bitcoin transaction
/// @param _voutIndex Index of the output that we are looking at
/// @param _script Desired recipient script
/// @param _scriptType Type of the script (e.g. P2PK)
/// @return bitcoinAmount Amount of BTC have been sent to the _script
function parseValueFromSpecificOutputHavingScript(
bytes memory _vout,
uint _voutIndex,
bytes memory _script,
ScriptTypes _scriptType
) internal pure returns (uint64 bitcoinAmount) {
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!voutView.isNull(), "BitcoinHelper: vout is null");
bytes29 output = indexVout(voutView, _voutIndex);
bytes29 _scriptPubkey = scriptPubkey(output);
if (_scriptType == ScriptTypes.P2PK) {
// note: first byte is Pushdata Bytelength.
// note: public key length is 32.
bitcoinAmount = keccak256(_script) == keccak256(abi.encodePacked(_scriptPubkey.index(1, 32))) ? value(output) : 0;
} else if (_scriptType == ScriptTypes.P2PKH) {
// note: first three bytes are OP_DUP, OP_HASH160, Pushdata Bytelength.
// note: public key hash length is 20.
bitcoinAmount = keccak256(_script) == keccak256(abi.encodePacked(_scriptPubkey.indexAddress(3))) ? value(output) : 0;
} else if (_scriptType == ScriptTypes.P2SH) {
// note: first two bytes are OP_HASH160, Pushdata Bytelength
// note: script hash length is 20.
bitcoinAmount = keccak256(_script) == keccak256(abi.encodePacked(_scriptPubkey.indexAddress(2))) ? value(output) : 0;
} else if (_scriptType == ScriptTypes.P2WPKH) {
// note: first two bytes are OP_0, Pushdata Bytelength
// note: segwit public key hash length is 20.
bitcoinAmount = keccak256(_script) == keccak256(abi.encodePacked(_scriptPubkey.indexAddress(2))) ? value(output) : 0;
} else if (_scriptType == ScriptTypes.P2WSH) {
// note: first two bytes are OP_0, Pushdata Bytelength
// note: segwit script hash length is 32.
bitcoinAmount = keccak256(_script) == keccak256(abi.encodePacked(_scriptPubkey.index(2, 32))) ? value(output) : 0;
}
}
/// @notice Parses the BTC amount of a transaction
/// @dev Finds the BTC amount that has been sent to the locking script
/// Returns zero if no matching locking scrip is found
/// @param _vout The vout of a Bitcoin transaction
/// @param _lockingScript Desired locking script
/// @return bitcoinAmount Amount of BTC have been sent to the _lockingScript
function parseValueHavingLockingScript(
bytes memory _vout,
bytes memory _lockingScript
) internal view returns (uint64 bitcoinAmount) {
// Checks that vout is not null
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!voutView.isNull(), "BitcoinHelper: vout is null");
bytes29 output;
bytes29 _scriptPubkey;
// Finds total number of outputs
uint _numberOfOutputs = uint256(indexCompactInt(voutView, 0));
for (uint index = 0; index < _numberOfOutputs; index++) {
output = indexVout(voutView, index);
_scriptPubkey = scriptPubkey(output);
if (
keccak256(abi.encodePacked(_scriptPubkey.clone())) == keccak256(abi.encodePacked(_lockingScript))
) {
bitcoinAmount = value(output);
// Stops searching after finding the desired locking script
break;
}
}
}
/// @notice Parses the BTC amount and the op_return of a transaction
/// @dev Finds the BTC amount that has been sent to the locking script
/// Assumes that payload size is less than 76 bytes
/// @param _vout The vout of a Bitcoin transaction
/// @param _lockingScript Desired locking script
/// @return bitcoinAmount Amount of BTC have been sent to the _lockingScript
/// @return arbitraryData Opreturn data of the transaction
function parseValueAndDataHavingLockingScriptSmallPayload(
bytes memory _vout,
bytes memory _lockingScript
) internal view returns (uint64 bitcoinAmount, bytes memory arbitraryData) {
// Checks that vout is not null
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!voutView.isNull(), "BitcoinHelper: vout is null");
bytes29 output;
bytes29 _scriptPubkey;
bytes29 _scriptPubkeyWithLength;
bytes29 _arbitraryData;
// Finds total number of outputs
uint _numberOfOutputs = uint256(indexCompactInt(voutView, 0));
for (uint index = 0; index < _numberOfOutputs; index++) {
output = indexVout(voutView, index);
_scriptPubkey = scriptPubkey(output);
_scriptPubkeyWithLength = scriptPubkeyWithLength(output);
_arbitraryData = opReturnPayloadSmall(_scriptPubkeyWithLength);
// Checks whether the output is an arbitarary data or not
if(_arbitraryData == TypedMemView.NULL) {
// Output is not an arbitrary data
if (
keccak256(abi.encodePacked(_scriptPubkey.clone())) == keccak256(abi.encodePacked(_lockingScript))
) {
bitcoinAmount = value(output);
}
} else {
// Returns the whole bytes array
arbitraryData = _arbitraryData.clone();
}
}
}
/// @notice Parses the BTC amount and the op_return of a transaction
/// @dev Finds the BTC amount that has been sent to the locking script
/// Assumes that payload size is greater than 75 bytes
/// @param _vout The vout of a Bitcoin transaction
/// @param _lockingScript Desired locking script
/// @return bitcoinAmount Amount of BTC have been sent to the _lockingScript
/// @return arbitraryData Opreturn data of the transaction
function parseValueAndDataHavingLockingScriptBigPayload(
bytes memory _vout,
bytes memory _lockingScript
) internal view returns (uint64 bitcoinAmount, bytes memory arbitraryData) {
// Checks that vout is not null
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!voutView.isNull(), "BitcoinHelper: vout is null");
bytes29 output;
bytes29 _scriptPubkey;
bytes29 _scriptPubkeyWithLength;
bytes29 _arbitraryData;
// Finds total number of outputs
uint _numberOfOutputs = uint256(indexCompactInt(voutView, 0));
for (uint index = 0; index < _numberOfOutputs; index++) {
output = indexVout(voutView, index);
_scriptPubkey = scriptPubkey(output);
_scriptPubkeyWithLength = scriptPubkeyWithLength(output);
_arbitraryData = opReturnPayloadBig(_scriptPubkeyWithLength);
// Checks whether the output is an arbitarary data or not
if(_arbitraryData == 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) {
// Output is not an arbitrary data
if (
keccak256(abi.encodePacked(_scriptPubkey.clone())) == keccak256(abi.encodePacked(_lockingScript))
) {
bitcoinAmount = value(output);
}
} else {
// Returns the whole bytes array
arbitraryData = _arbitraryData.clone();
}
}
}
/// @notice extracts the scriptPubkey from an output
/// @param _output the output
/// @return the scriptPubkey
function scriptPubkey(bytes29 _output) internal pure typeAssert(_output, BTCTypes.TxOut) returns (bytes29) {
uint64 scriptLength = indexCompactInt(_output, 8);
return _output.slice(8 + compactIntLength(scriptLength), scriptLength, uint40(BTCTypes.ScriptPubkey));
}
/// @notice extracts the scriptPubkey from an output
/// @param _output the output
/// @return the scriptPubkey
function scriptPubkeyWithLength(bytes29 _output) internal pure typeAssert(_output, BTCTypes.TxOut) returns (bytes29) {
uint64 scriptLength = indexCompactInt(_output, 8);
return _output.slice(8, compactIntLength(scriptLength) + scriptLength, uint40(BTCTypes.ScriptPubkey));
}
/// @notice Parses locking script from an output
/// @dev Reverts if vout is null
/// @param _vout The vout of a Bitcoin transaction
/// @param _index Index of the output that we are looking at
/// @return _lockingScript Parsed locking script
function getLockingScript(
bytes memory _vout,
uint _index
) internal view returns (bytes memory _lockingScript) {
bytes29 vout = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
require(!vout.isNull(), "BitcoinHelper: vout is null");
bytes29 output = indexVout(vout, _index);
bytes29 _lockingScriptBytes29 = scriptPubkey(output);
_lockingScript = _lockingScriptBytes29.clone();
}
/// @notice Returns number of outputs in a vout
/// @param _vout The vout of a Bitcoin transaction
function numberOfOutputs(bytes memory _vout) internal pure returns (uint _numberOfOutputs) {
bytes29 voutView = tryAsVout(_vout.ref(uint40(BTCTypes.Unknown)));
_numberOfOutputs = uint256(indexCompactInt(voutView, 0));
}
/// @notice determines the length of the first output in an array of outputs
/// @param _outputs the vout without its length prefix
/// @return the output length
function outputLength(bytes29 _outputs) private pure typeAssert(_outputs, BTCTypes.IntermediateTxOuts) returns (uint256) {
uint64 scriptLength = indexCompactInt(_outputs, 8);
return uint256(compactIntLength(scriptLength)) + uint256(scriptLength) + 8;
}
/// @notice extracts the output at a specified index
/// @param _vout the vout
/// @param _index the index of the desired output
/// @return the desired output
function indexVout(bytes29 _vout, uint256 _index) internal pure typeAssert(_vout, BTCTypes.Vout) returns (bytes29) {
uint256 _nOuts = uint256(indexCompactInt(_vout, 0));
uint256 _viewLen = _vout.len();
require(_index < _nOuts, "Vout read overrun");
uint256 _offset = uint256(compactIntLength(uint64(_nOuts)));
bytes29 _remaining;
for (uint256 _i = 0; _i < _index; _i += 1) {
_remaining = _vout.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxOuts));
_offset += outputLength(_remaining);
}
_remaining = _vout.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxOuts));
uint256 _len = outputLength(_remaining);
return _vout.slice(_offset, _len, uint40(BTCTypes.TxOut));
}
/// @notice extracts the Op Return Payload
/// @dev structure of the input is: 1 byte op return + 2 bytes indicating the length of payload + max length for op return payload is 80 bytes
/// @param _spk the scriptPubkey
/// @return the Op Return Payload (or null if not a valid Op Return output)
function opReturnPayloadBig(bytes29 _spk) internal pure typeAssert(_spk, BTCTypes.ScriptPubkey) returns (bytes29) {
uint64 _bodyLength = indexCompactInt(_spk, 0);
uint64 _payloadLen = _spk.indexUint(3, 1).toUint64();
if (_bodyLength > 83 || _bodyLength < 4 || _spk.indexUint(1, 1) != 0x6a || _spk.indexUint(3, 1) != _bodyLength - 3) {
return TypedMemView.nullView();
}
return _spk.slice(4, _payloadLen, uint40(BTCTypes.OpReturnPayload));
}
/// @notice extracts the Op Return Payload
/// @dev structure of the input is: 1 byte op return + 1 bytes indicating the length of payload + max length for op return payload is 75 bytes
/// @param _spk the scriptPubkey
/// @return the Op Return Payload (or null if not a valid Op Return output)
function opReturnPayloadSmall(bytes29 _spk) internal pure typeAssert(_spk, BTCTypes.ScriptPubkey) returns (bytes29) {
uint64 _bodyLength = indexCompactInt(_spk, 0);
uint64 _payloadLen = _spk.indexUint(2, 1).toUint64();
if (_bodyLength > 77 || _bodyLength < 4 || _spk.indexUint(1, 1) != 0x6a || _spk.indexUint(2, 1) != _bodyLength - 2) {
return TypedMemView.nullView();
}
return _spk.slice(3, _payloadLen, uint40(BTCTypes.OpReturnPayload));
}
/// @notice verifies the vin and converts to a typed memory
/// @dev will return null in error cases
/// @param _vin the vin
/// @return the typed vin (or null if error)
function tryAsVin(bytes29 _vin) internal pure typeAssert(_vin, BTCTypes.Unknown) returns (bytes29) {
if (_vin.len() == 0) {
return TypedMemView.nullView();
}
uint64 _nIns = indexCompactInt(_vin, 0);
uint256 _viewLen = _vin.len();
if (_nIns == 0) {
return TypedMemView.nullView();
}
uint256 _offset = uint256(compactIntLength(_nIns));
for (uint256 i = 0; i < _nIns; i++) {
if (_offset >= _viewLen) {
// We've reached the end, but are still trying to read more
return TypedMemView.nullView();
}
bytes29 _remaining = _vin.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxIns));
_offset += inputLength(_remaining);
}
if (_offset != _viewLen) {
return TypedMemView.nullView();
}
return _vin.castTo(uint40(BTCTypes.Vin));
}
/// @notice verifies the vout and converts to a typed memory
/// @dev will return null in error cases
/// @param _vout the vout
/// @return the typed vout (or null if error)
function tryAsVout(bytes29 _vout) internal pure typeAssert(_vout, BTCTypes.Unknown) returns (bytes29) {
if (_vout.len() == 0) {
return TypedMemView.nullView();
}
uint64 _nOuts = indexCompactInt(_vout, 0);
uint256 _viewLen = _vout.len();
if (_nOuts == 0) {
return TypedMemView.nullView();
}
uint256 _offset = uint256(compactIntLength(_nOuts));
for (uint256 i = 0; i < _nOuts; i++) {
if (_offset >= _viewLen) {
// We've reached the end, but are still trying to read more
return TypedMemView.nullView();
}
bytes29 _remaining = _vout.postfix(_viewLen - _offset, uint40(BTCTypes.IntermediateTxOuts));
_offset += outputLength(_remaining);
}
if (_offset != _viewLen) {
return TypedMemView.nullView();
}
return _vout.castTo(uint40(BTCTypes.Vout));
}
/// @notice verifies the header and converts to a typed memory
/// @dev will return null in error cases
/// @param _header the header
/// @return the typed header (or null if error)
function tryAsHeader(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Unknown) returns (bytes29) {
if (_header.len() != 80) {
return TypedMemView.nullView();
}
return _header.castTo(uint40(BTCTypes.Header));
}
/// @notice Index a header array.
/// @dev Errors on overruns
/// @param _arr The header array
/// @param index The 0-indexed location of the header to get
/// @return the typed header at `index`
function indexHeaderArray(bytes29 _arr, uint256 index) internal pure typeAssert(_arr, BTCTypes.HeaderArray) returns (bytes29) {
uint256 _start = index * 80;
return _arr.slice(_start, 80, uint40(BTCTypes.Header));
}
/// @notice verifies the header array and converts to a typed memory
/// @dev will return null in error cases
/// @param _arr the header array
/// @return the typed header array (or null if error)
function tryAsHeaderArray(bytes29 _arr) internal pure typeAssert(_arr, BTCTypes.Unknown) returns (bytes29) {
if (_arr.len() % 80 != 0) {
return TypedMemView.nullView();
}
return _arr.castTo(uint40(BTCTypes.HeaderArray));
}
/// @notice verifies the merkle array and converts to a typed memory
/// @dev will return null in error cases
/// @param _arr the merkle array
/// @return the typed merkle array (or null if error)
function tryAsMerkleArray(bytes29 _arr) internal pure typeAssert(_arr, BTCTypes.Unknown) returns (bytes29) {
if (_arr.len() % 32 != 0) {
return TypedMemView.nullView();
}
return _arr.castTo(uint40(BTCTypes.MerkleArray));
}
/// @notice extracts the merkle root from the header
/// @param _header the header
/// @return the merkle root
function merkleRoot(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Header) returns (bytes32) {
return _header.index(36, 32);
}
/// @notice extracts the target from the header
/// @param _header the header
/// @return the target
function target(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Header) returns (uint256) {
uint256 _mantissa = _header.indexLEUint(72, 3);
require(_header.indexUint(75, 1) > 2, "ViewBTC: invalid target difficulty");
uint256 _exponent = _header.indexUint(75, 1) - 3;
return _mantissa * (256 ** _exponent);
}
/// @notice calculates the difficulty from a target
/// @param _target the target
/// @return the difficulty
function toDiff(uint256 _target) private pure returns (uint256) {
return DIFF1_TARGET / (_target);
}
/// @notice extracts the difficulty from the header
/// @param _header the header
/// @return the difficulty
function diff(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Header) returns (uint256) {
return toDiff(target(_header));
}
/// @notice extracts the timestamp from the header
/// @param _header the header
/// @return the timestamp
function time(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Header) returns (uint32) {
return uint32(_header.indexLEUint(68, 4));
}
/// @notice extracts the parent hash from the header
/// @param _header the header
/// @return the parent hash
function parent(bytes29 _header) internal pure typeAssert(_header, BTCTypes.Header) returns (bytes32) {
return _header.index(4, 32);
}
/// @notice Checks validity of header chain
/// @dev Compares current header parent to previous header's digest
/// @param _header The raw bytes header
/// @param _prevHeaderDigest The previous header's digest
/// @return true if the connect is valid, false otherwise
function checkParent(bytes29 _header, bytes32 _prevHeaderDigest) internal pure typeAssert(_header, BTCTypes.Header) returns (bool) {
return parent(_header) == _prevHeaderDigest;
}
/// @notice Validates a tx inclusion in the block
/// @dev `index` is not a reliable indicator of location within a block
/// @param _txid The txid (LE)
/// @param _merkleRoot The merkle root
/// @param _intermediateNodes The proof's intermediate nodes (digests between leaf and root)
/// @param _index The leaf's index in the tree (0-indexed)
/// @return true if fully valid, false otherwise
function prove(
bytes32 _txid,
bytes32 _merkleRoot,
bytes29 _intermediateNodes,
uint _index
) internal view typeAssert(_intermediateNodes, BTCTypes.MerkleArray) returns (bool) {
// Shortcut the empty-block case
if (
_txid == _merkleRoot &&
_index == 0 &&
_intermediateNodes.len() == 0
) {
return true;
}
return checkMerkle(_txid, _intermediateNodes, _merkleRoot, _index);
}
/// @notice verifies a merkle proof
/// @dev leaf, proof, and root are in LE format
/// @param _leaf the leaf
/// @param _proof the proof nodes
/// @param _root the merkle root
/// @param _index the index
/// @return true if valid, false if otherwise
function checkMerkle(
bytes32 _leaf,
bytes29 _proof,
bytes32 _root,
uint256 _index
) private view typeAssert(_proof, BTCTypes.MerkleArray) returns (bool) {
uint256 nodes = _proof.len() / 32;
if (nodes == 0) {
return _leaf == _root;
}
uint256 _idx = _index;
bytes32 _current = _leaf;
for (uint i = 0; i < nodes; i++) {
bytes32 _next = _proof.index(i * 32, 32);
if (_idx % 2 == 1) {
_current = merkleStep(_next, _current);
} else {
_current = merkleStep(_current, _next);
}
_idx >>= 1;
}
return _current == _root;
}
/// @notice Concatenates and hashes two inputs for merkle proving
/// @dev Not recommended to call directly.
/// @param _a The first hash
/// @param _b The second hash
/// @return digest The double-sha256 of the concatenated hashes
function merkleStep(bytes32 _a, bytes32 _b) private view returns (bytes32 digest) {
assembly {
// solium-disable-previous-line security/no-inline-assembly
let ptr := mload(0x40)
mstore(ptr, _a)
mstore(add(ptr, 0x20), _b)
pop(staticcall(gas(), 2, ptr, 0x40, ptr, 0x20)) // sha256 #1
pop(staticcall(gas(), 2, ptr, 0x20, ptr, 0x20)) // sha256 #2
digest := mload(ptr)
}
}
/// @notice performs the bitcoin difficulty retarget
/// @dev implements the Bitcoin algorithm precisely
/// @param _previousTarget the target of the previous period
/// @param _firstTimestamp the timestamp of the first block in the difficulty period
/// @param _secondTimestamp the timestamp of the last block in the difficulty period
/// @return the new period's target threshold
function retargetAlgorithm(
uint256 _previousTarget,
uint256 _firstTimestamp,
uint256 _secondTimestamp
) internal pure returns (uint256) {
uint256 _elapsedTime = _secondTimestamp - _firstTimestamp;
// Normalize ratio to factor of 4 if very long or very short
if (_elapsedTime < RETARGET_PERIOD / 4) {
_elapsedTime = RETARGET_PERIOD / 4;
}
if (_elapsedTime > RETARGET_PERIOD * 4) {
_elapsedTime = RETARGET_PERIOD * 4;
}
/*
NB: high targets e.g. ffff0020 can cause overflows here
so we divide it by 256**2, then multiply by 256**2 later
we know the target is evenly divisible by 256**2, so this isn't an issue
*/
uint256 _adjusted = _previousTarget / 65536 * _elapsedTime;
return _adjusted / RETARGET_PERIOD * 65536;
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
interface ICCTransferRouter {
// Structures
/// @notice Structure for recording cross-chain transfer requests
/// @param inputAmount Amount of locked BTC on source chain
/// @param recipientAddress Address of transfer recipient
/// @param fee Amount of fee that is paid to Teleporter (tx, relayer and teleporter fees)
/// @param speed Speed of the request (normal or instant)
/// @param isUsed Whether the tx is used or not
struct ccTransferRequest {
uint inputAmount;
address recipientAddress;
uint fee;
uint256 speed;
bool isUsed;
}
// Events
/// @notice Emits when a cc transfer request gets done
/// @param lockerLockingScript Locking script of the locker on bitcoin network
/// @param lockerScriptType Script type of the locker locking script
/// @param lockerTargetAddress Address of the locker on EVM based target chain
/// @param user Address of teleBTC recipient
/// @param inputAmount Amount of tokens that user locked on source chain
/// @param receivedAmount Amount of tokens that user receives
/// @param speed Speed of the request (normal or instant)
/// @param teleporter Address of teleporter who submitted the request
/// @param teleporterFee Amount of fee that is paid to Teleporter (tx, relayer and teleporter fees)
/// @param relayFee Amount of fee that is paid to relay contract
/// @param protocolFee Amount of fee that is paid to the protocol
/// @param bitcoinTxId Address of teleporter who submitted the request
event CCTransfer(
bytes indexed lockerLockingScript,
uint lockerScriptType,
address lockerTargetAddress,
address indexed user,
uint inputAmount,
uint receivedAmount,
uint indexed speed,
address teleporter,
uint teleporterFee,
uint relayFee,
uint protocolFee,
bytes32 bitcoinTxId
);
/// @notice Emits when changes made to relay address
event NewRelay (
address oldRelay,
address newRelay
);
/// @notice Emits when changes made to InstantRouter address
event NewInstantRouter (
address oldInstantRouter,
address newInstantRouter
);
/// @notice Emits when changes made to Lockers address
event NewLockers (
address oldLockers,
address newLockers
);
/// @notice Emits when changes made to TeleBTC address
event NewTeleBTC (
address oldTeleBTC,
address newTeleBTC
);
/// @notice Emits when changes made to protocol percentage fee
event NewProtocolPercentageFee (
uint oldProtocolPercentageFee,
uint newProtocolPercentageFee
);
/// @notice Emits when changes made to Treasury address
event NewTreasury (
address oldTreasury,
address newTreasury
);
// Read-only functions
function startingBlockNumber() external view returns (uint);
function protocolPercentageFee() external view returns (uint);
function chainId() external view returns (uint);
function appId() external view returns (uint);
function relay() external view returns (address);
function instantRouter() external view returns (address);
function lockers() external view returns (address);
function teleBTC() external view returns (address);
function treasury() external view returns (address);
function isRequestUsed(bytes32 _txId) external view returns (bool);
// State-changing functions
function setRelay(address _relay) external;
function setInstantRouter(address _instantRouter) external;
function setLockers(address _lockers) external;
function setTeleBTC(address _teleBTC) external;
function setTreasury(address _treasury) external;
function setProtocolPercentageFee(uint _protocolPercentageFee) external;
function ccTransfer(
// Bitcoin tx
bytes4 _version,
bytes memory _vin,
bytes calldata _vout,
bytes4 _locktime,
// Bitcoin block number
uint256 _blockNumber,
// Merkle proof
bytes calldata _intermediateNodes,
uint _index,
bytes calldata _lockerLockingScript
) external payable returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface ITeleBTC is IERC20 {
// Events
event Mint(address indexed doer, address indexed receiver, uint value);
event Burn(address indexed doer, address indexed burner, uint value);
event MinterAdded(address indexed newMinter);
event MinterRemoved(address indexed minter);
event BurnerAdded(address indexed newBurner);
event BurnerRemoved(address indexed burner);
event NewMintLimit(uint oldMintLimit, uint newMintLimit);
event NewEpochLength(uint oldEpochLength, uint newEpochLength);
// read functions
function decimals() external view returns (uint8);
// state-changing functions
function addMinter(address account) external;
function removeMinter(address account) external;
function addBurner(address account) external;
function removeBurner(address account) external;
function mint(address receiver, uint amount) external returns(bool);
function burn(uint256 amount) external returns(bool);
function setMaxMintLimit(uint _mintLimit) external;
function setEpochLength(uint _length) external;
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
interface IBitcoinRelay {
// Structures
/// @notice Structure for recording block header
/// @param selfHash Hash of block header
/// @param parentHash Hash of parent block header
/// @param merkleRoot Merkle root of transactions in the block
/// @param relayer Address of relayer who submitted the block header
/// @param gasPrice Gas price of tx that relayer submitted the block header
struct blockHeader {
bytes32 selfHash;
bytes32 parentHash;
bytes32 merkleRoot;
address relayer;
uint gasPrice;
}
// Events
/// @notice Emits when a block header is added
/// @param height Height of submitted header
/// @param selfHash Hash of submitted header
/// @param parentHash Parent hash of submitted header
/// @param relayer Address of relayer who submitted the block header
event BlockAdded(
uint indexed height,
bytes32 selfHash,
bytes32 indexed parentHash,
address indexed relayer
);
/// @notice Emits when a block header gets finalized
/// @param height Height of the header
/// @param selfHash Hash of the header
/// @param parentHash Parent hash of the header
/// @param relayer Address of relayer who submitted the block header
/// @param rewardAmountTNT Amount of reward that the relayer receives in target native token
/// @param rewardAmountTDT Amount of reward that the relayer receives in TDT
event BlockFinalized(
uint indexed height,
bytes32 selfHash,
bytes32 parentHash,
address indexed relayer,
uint rewardAmountTNT,
uint rewardAmountTDT
);
/// @notice Emits when changes made to reward amount in TDT
event NewRewardAmountInTDT (
uint oldRewardAmountInTDT,
uint newRewardAmountInTDT
);
/// @notice Emits when changes made to finalization parameter
event NewFinalizationParameter (
uint oldFinalizationParameter,
uint newFinalizationParameter
);
/// @notice Emits when changes made to relayer percentage fee
event NewRelayerPercentageFee (
uint oldRelayerPercentageFee,
uint newRelayerPercentageFee
);
/// @notice Emits when changes made to teleportDAO token
event NewTeleportDAOToken (
address oldTeleportDAOToken,
address newTeleportDAOToken
);
/// @notice Emits when changes made to epoch length
event NewEpochLength(
uint oldEpochLength,
uint newEpochLength
);
/// @notice Emits when changes made to base queries
event NewBaseQueries(
uint oldBaseQueries,
uint newBaseQueries
);
/// @notice Emits when changes made to submission gas used
event NewSubmissionGasUsed(
uint oldSubmissionGasUsed,
uint newSubmissionGasUsed
);
// Read-only functions
function relayGenesisHash() external view returns (bytes32);
function initialHeight() external view returns(uint);
function lastSubmittedHeight() external view returns(uint);
function finalizationParameter() external view returns(uint);
function TeleportDAOToken() external view returns(address);
function relayerPercentageFee() external view returns(uint);
function epochLength() external view returns(uint);
function lastEpochQueries() external view returns(uint);
function currentEpochQueries() external view returns(uint);
function baseQueries() external view returns(uint);
function submissionGasUsed() external view returns(uint);
function getBlockHeaderHash(uint height, uint index) external view returns(bytes32);
function getBlockHeaderFee(uint _height, uint _index) external view returns(uint);
function getNumberOfSubmittedHeaders(uint height) external view returns (uint);
function availableTDT() external view returns(uint);
function availableTNT() external view returns(uint);
function findHeight(bytes32 _hash) external view returns (uint256);
function findAncestor(bytes32 _hash, uint256 _offset) external view returns (bytes32);
function isAncestor(bytes32 _ancestor, bytes32 _descendant, uint256 _limit) external view returns (bool);
function rewardAmountInTDT() external view returns (uint);
// State-changing functions
function pauseRelay() external;
function unpauseRelay() external;
function setRewardAmountInTDT(uint _rewardAmountInTDT) external;
function setFinalizationParameter(uint _finalizationParameter) external;
function setRelayerPercentageFee(uint _relayerPercentageFee) external;
function setTeleportDAOToken(address _TeleportDAOToken) external;
function setEpochLength(uint _epochLength) external;
function setBaseQueries(uint _baseQueries) external;
function setSubmissionGasUsed(uint _submissionGasUsed) external;
function checkTxProof(
bytes32 txid,
uint blockHeight,
bytes calldata intermediateNodes,
uint index
) external payable returns (bool);
function addHeaders(bytes calldata _anchor, bytes calldata _headers) external returns (bool);
function addHeadersWithRetarget(
bytes calldata _oldPeriodStartHeader,
bytes calldata _oldPeriodEndHeader,
bytes calldata _headers
) external returns (bool);
function ownerAddHeaders(bytes calldata _anchor, bytes calldata _headers) external returns (bool);
function ownerAddHeadersWithRetarget(
bytes calldata _oldPeriodStartHeader,
bytes calldata _oldPeriodEndHeader,
bytes calldata _headers
) external returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
interface IInstantRouter {
// Structures
/// @notice Structure for recording instant requests
/// @param user Address of user who recieves loan
/// @param collateralPool Address of collateral pool
/// @param collateralToken Address of underlying collateral token
/// @param paybackAmount Amount of (loan + instant fee)
/// @param lockedCollateralPoolTokenAmount Amount of locked collateral pool token for getting loan
/// @param deadline Deadline for paying back the loan
/// @param requestCounterOfUser The index of the request for a specific user
struct instantRequest {
address user;
address collateralPool;
address collateralToken;
uint paybackAmount;
uint lockedCollateralPoolTokenAmount;
uint deadline;
uint requestCounterOfUser;
}
// Events
/// @notice Emits when a user gets loan for transfer
/// @param user Address of the user who made the request
/// @param receiver Address of the loan receiver
/// @param loanAmount Amount of the loan
/// @param instantFee Amount of the instant loan fee
/// @param deadline Deadline of paying back the loan
/// @param collateralToken Address of the collateral token
/// @param lockedCollateralPoolToken Amount of collateral pool token that got locked
event InstantTransfer(
address indexed user,
address receiver,
uint loanAmount,
uint instantFee,
uint indexed deadline,
address indexed collateralToken,
uint lockedCollateralPoolToken,
uint requestCounterOfUser
);
/// @notice Emits when a user gets loan for exchange
/// @param user Address of the user who made the request
/// @param receiver Address of the loan receiver
/// @param loanAmount Amount of the loan
/// @param instantFee Amount of the instant loan fee
/// @param amountOut Amount of the output token
/// @param path Path of exchanging tokens
/// @param isFixed Shows whether input or output is fixed in exchange
/// @param deadline Deadline of getting the loan
/// @param collateralToken Address of the collateral token
/// @param lockedCollateralPoolToken Amount of collateral pool token that got locked
event InstantExchange(
address indexed user,
address receiver,
uint loanAmount,
uint instantFee,
uint amountOut,
address[] path,
bool isFixed,
uint indexed deadline,
address indexed collateralToken,
uint lockedCollateralPoolToken,
uint requestCounterOfUser
);
/// @notice Emits when a loan gets paid back
/// @param user Address of user who recieves loan
/// @param paybackAmount Amount of (loan + fee) that should be paid back
/// @param collateralToken Address of underlying collateral token
/// @param lockedCollateralPoolToken Amount of locked collateral pool token for getting loan
event PaybackLoan(
address indexed user,
uint paybackAmount,
address indexed collateralToken,
uint lockedCollateralPoolToken,
uint requestCounterOfUser
);
/// @notice Emits when a user gets slashed
/// @param user Address of user who recieves loan
/// @param collateralToken Address of collateral underlying token
/// @param slashedAmount How much user got slashed
/// @param paybackAmount Address of collateral underlying token
/// @param slasher Address of slasher
/// @param slasherReward Slasher reward (in collateral token)
event SlashUser(
address indexed user,
address indexed collateralToken,
uint slashedAmount,
uint paybackAmount,
address indexed slasher,
uint slasherReward,
uint requestCounterOfUser
);
/// @notice Emits when changes made to payback deadline
event NewPaybackDeadline(
uint oldPaybackDeadline,
uint newPaybackDeadline
);
/// @notice Emits when changes made to slasher percentage reward
event NewSlasherPercentageReward(
uint oldSlasherPercentageReward,
uint newSlasherPercentageReward
);
/// @notice Emits when changes made to treasuray overhead percnet
event NewTreasuaryAddress(
address oldTreasuaryAddress,
address newTreasuaryAddress
);
/// @notice Emits when changes made to max price difference percent
event NewMaxPriceDifferencePercent(
uint oldMaxPriceDifferencePercent,
uint newMaxPriceDifferencePercent
);
/// @notice Emits when changes made to TeleBTC address
event NewTeleBTC(
address oldTeleBTC,
address newTeleBTC
);
/// @notice Emits when changes made to relay address
event NewRelay(
address oldRelay,
address newRelay
);
/// @notice Emits when changes made to collateral pool factory address
event NewCollateralPoolFactory(
address oldCollateralPoolFactory,
address newCollateralPoolFactory
);
/// @notice Emits when changes made to price oracle address
event NewPriceOracle(
address oldPriceOracle,
address newPriceOracle
);
/// @notice Emits when changes made to TeleBTC instant pool address
event NewTeleBTCInstantPool(
address oldTeleBTCInstantPool,
address newTeleBTCInstantPool
);
/// @notice Emits when changes made to default exchange connector address
event NewDefaultExchangeConnector(
address oldDefaultExchangeConnector,
address newDefaultExchangeConnector
);
// Read-only functions
function pause() external;
function unpause() external;
function teleBTCInstantPool() external view returns (address);
function teleBTC() external view returns (address);
function relay() external view returns (address);
function collateralPoolFactory() external view returns (address);
function priceOracle() external view returns (address);
function slasherPercentageReward() external view returns (uint);
function paybackDeadline() external view returns (uint);
function defaultExchangeConnector() external view returns (address);
function getLockedCollateralPoolTokenAmount(address _user, uint _index) external view returns (uint);
function getUserRequestsLength(address _user) external view returns (uint);
function getUserRequestDeadline(address _user, uint _index) external view returns (uint);
function maxPriceDifferencePercent() external view returns (uint);
function treasuaryAddress() external view returns (address);
// State-changing functions
function setPaybackDeadline(uint _paybackDeadline) external;
function setSlasherPercentageReward(uint _slasherPercentageReward) external;
function setPriceOracle(address _priceOracle) external;
function setCollateralPoolFactory(address _collateralPoolFactory) external;
function setRelay(address _relay) external;
function setTeleBTC(address _teleBTC) external;
function setTeleBTCInstantPool(address _teleBTCInstantPool) external;
function setDefaultExchangeConnector(address _defaultExchangeConnector) external;
function setTreasuaryAddress(address _treasuaryAddres) external;
function setMaxPriceDifferencePercent(uint _maxPriceDifferencePercent) external;
function instantCCTransfer(
address _receiver,
uint _loanAmount,
uint _deadline,
address _collateralPool
) external returns (bool);
function instantCCExchange(
address _exchangeConnector,
address _receiver,
uint _loanAmount,
uint _amountOut,
address[] memory _path,
uint _deadline,
address _collateralToken,
bool _isFixedToken
) external returns (uint[] memory);
function payBackLoan(address _user, uint _teleBTCAmount) external returns (bool);
function slashUser(
address _user,
uint _requestIndex
) external returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "./ILockersStorage.sol";
interface ILockers is ILockersStorage {
// Events
event RequestAddLocker(
address indexed lockerTargetAddress,
bytes lockerLockingScript,
uint TDTLockedAmount,
uint nativeTokenLockedAmount
);
event RevokeAddLockerRequest(
address indexed lockerTargetAddress,
bytes lockerLockingScript,
uint TDTLockedAmount,
uint nativeTokenLockedAmount
);
event RequestInactivateLocker(
address indexed lockerTargetAddress,
uint indexed inactivationTimestamp,
bytes lockerLockingScript,
uint TDTLockedAmount,
uint nativeTokenLockedAmount,
uint netMinted
);
event ActivateLocker(
address indexed lockerTargetAddress,
bytes lockerLockingScript,
uint TDTLockedAmount,
uint nativeTokenLockedAmount,
uint netMinted
);
event LockerAdded(
address indexed lockerTargetAddress,
bytes lockerLockingScript,
uint TDTLockedAmount,
uint nativeTokenLockedAmount,
uint addingTime
);
event LockerRemoved(
address indexed lockerTargetAddress,
bytes lockerLockingScript,
uint TDTUnlockedAmount,
uint nativeTokenUnlockedAmount
);
event LockerSlashed(
address indexed lockerTargetAddress,
uint rewardAmount,
address indexed rewardRecipient,
uint amount,
address indexed recipient,
uint slashedCollateralAmount,
uint slashTime,
bool isForCCBurn
);
event LockerLiquidated(
address indexed lockerTargetAddress,
address indexed liquidatorAddress,
uint collateralAmount,
uint teleBTCAmount,
uint liquidateTime
);
event LockerSlashedCollateralSold(
address indexed lockerTargetAddress,
address indexed buyerAddress,
uint slashingAmount,
uint teleBTCAmount,
uint slashingTime
);
event CollateralAdded(
address indexed lockerTargetAddress,
uint addedCollateral,
uint totalCollateral,
uint addingTime
);
event CollateralRemoved(
address indexed lockerTargetAddress,
uint removedCollateral,
uint totalCollateral,
uint removingTime
);
event MintByLocker(
address indexed lockerTargetAddress,
address indexed receiver,
uint mintedAmount,
uint lockerFee,
uint mintingTime
);
event BurnByLocker(
address indexed lockerTargetAddress,
uint burntAmount,
uint lockerFee,
uint burningTime
);
event MinterAdded(
address indexed account
);
event MinterRemoved(
address indexed account
);
event BurnerAdded(
address indexed account
);
event BurnerRemoved(
address indexed account
);
event NewLockerPercentageFee(
uint oldLockerPercentageFee,
uint newLockerPercentageFee
);
event NewPriceWithDiscountRatio(
uint oldPriceWithDiscountRatio,
uint newPriceWithDiscountRatio
);
event NewMinRequiredTDTLockedAmount(
uint oldMinRequiredTDTLockedAmount,
uint newMinRequiredTDTLockedAmount
);
event NewMinRequiredTNTLockedAmount(
uint oldMinRequiredTNTLockedAmount,
uint newMinRequiredTNTLockedAmount
);
event NewPriceOracle(
address oldPriceOracle,
address newPriceOracle
);
event NewCCBurnRouter(
address oldCCBurnRouter,
address newCCBurnRouter
);
event NewExchangeConnector(
address oldExchangeConnector,
address newExchangeConnector
);
event NewTeleportDAOToken(
address oldTDTToken,
address newTDTToken
);
event NewTeleBTC(
address oldTeleBTC,
address newTeleBTC
);
event NewCollateralRatio(
uint oldCollateralRatio,
uint newCollateralRatio
);
event NewLiquidationRatio(
uint oldLiquidationRatio,
uint newLiquidationRatio
);
// Read-only functions
function getLockerTargetAddress(bytes calldata _lockerLockingScript) external view returns (address);
function isLocker(bytes calldata _lockerLockingScript) external view returns (bool);
function getNumberOfLockers() external view returns (uint);
function getLockerLockingScript(address _lockerTargetAddress) external view returns (bytes memory);
function isLockerActive(address _lockerTargetAddress) external view returns (bool);
function getLockerCapacity(address _lockerTargetAddress) external view returns (uint);
function priceOfOneUnitOfCollateralInBTC() external view returns (uint);
function isMinter(address account) external view returns(bool);
function isBurner(address account) external view returns(bool);
// State-changing functions
function pauseLocker() external;
function unPauseLocker() external;
function addMinter(address _account) external;
function removeMinter(address _account) external;
function addBurner(address _account) external;
function removeBurner(address _account) external;
function mint(bytes calldata _lockerLockingScript, address _receiver, uint _amount) external returns(uint);
function burn(bytes calldata _lockerLockingScript, uint256 _amount) external returns(uint);
function setTeleportDAOToken(address _tdtTokenAddress) external;
function setLockerPercentageFee(uint _lockerPercentageFee) external;
function setPriceWithDiscountRatio(uint _priceWithDiscountRatio) external;
function setMinRequiredTDTLockedAmount(uint _minRequiredTDTLockedAmount) external;
function setMinRequiredTNTLockedAmount(uint _minRequiredTNTLockedAmount) external;
function setPriceOracle(address _priceOracle) external;
function setCCBurnRouter(address _ccBurnRouter) external;
function setExchangeConnector(address _exchangeConnector) external;
function setTeleBTC(address _teleBTC) external;
function setCollateralRatio(uint _collateralRatio) external;
function setLiquidationRatio(uint _liquidationRatio) external;
function liquidateLocker(
address _lockerTargetAddress,
uint _btcAmount
) external returns (bool);
function addCollateral(
address _lockerTargetAddress,
uint _addingNativeTokenAmount
) external payable returns (bool);
function removeCollateral(
uint _removingNativeTokenAmount
) external payable returns (bool);
function requestToBecomeLocker(
bytes calldata _lockerLockingScript,
uint _lockedTDTAmount,
uint _lockedNativeTokenAmount,
ScriptTypes _lockerRescueType,
bytes calldata _lockerRescueScript
) external payable returns (bool);
function revokeRequest() external returns (bool);
function addLocker(address _lockerTargetAddress) external returns (bool);
function requestInactivation() external returns (bool);
function requestActivation() external returns (bool);
function selfRemoveLocker() external returns (bool);
function slashIdleLocker(
address _lockerTargetAddress,
uint _rewardAmount,
address _rewardRecipient,
uint _amount,
address _recipient
) external returns(bool);
function slashThiefLocker(
address _lockerTargetAddress,
uint _rewardAmount,
address _rewardRecipient,
uint _amount
) external returns(bool);
function buySlashedCollateralOfLocker(
address _lockerTargetAddress,
uint _collateralAmount
) external returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @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);
}
}// SPDX-License-Identifier: MIT
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);
}
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
/** @author Summa (https://summa.one) */
/*
Original version: https://github.com/summa-tx/memview-sol/blob/main/contracts/TypedMemView.sol
We made few changes to the original version:
1. Use solidity version 8 compiler
2. Remove SafeMath library
3. Add unchecked in line 522
*/
library TypedMemView {
// Why does this exist?
// the solidity `bytes memory` type has a few weaknesses.
// 1. You can't index ranges effectively
// 2. You can't slice without copying
// 3. The underlying data may represent any type
// 4. Solidity never deallocates memory, and memory costs grow
// superlinearly
// By using a memory view instead of a `bytes memory` we get the following
// advantages:
// 1. Slices are done on the stack, by manipulating the pointer
// 2. We can index arbitrary ranges and quickly convert them to stack types
// 3. We can insert type info into the pointer, and typecheck at runtime
// This makes `TypedMemView` a useful tool for efficient zero-copy
// algorithms.
// Why bytes29?
// We want to avoid confusion between views, digests, and other common
// types so we chose a large and uncommonly used odd number of bytes
//
// Note that while bytes are left-aligned in a word, integers and addresses
// are right-aligned. This means when working in assembly we have to
// account for the 3 unused bytes on the righthand side
//
// First 5 bytes are a type flag.
// - ff_ffff_fffe is reserved for unknown type.
// - ff_ffff_ffff is reserved for invalid types/errors.
// next 12 are memory address
// next 12 are len
// bottom 3 bytes are empty
// Assumptions:
// - non-modification of memory.
// - No Solidity updates
// - - wrt free mem point
// - - wrt bytes representation in memory
// - - wrt memory addressing in general
// Usage:
// - create type constants
// - use `assertType` for runtime type assertions
// - - unfortunately we can't do this at compile time yet :(
// - recommended: implement modifiers that perform type checking
// - - e.g.
// - - `uint40 constant MY_TYPE = 3;`
// - - ` modifer onlyMyType(bytes29 myView) { myView.assertType(MY_TYPE); }`
// - instantiate a typed view from a bytearray using `ref`
// - use `index` to inspect the contents of the view
// - use `slice` to create smaller views into the same memory
// - - `slice` can increase the offset
// - - `slice can decrease the length`
// - - must specify the output type of `slice`
// - - `slice` will return a null view if you try to overrun
// - - make sure to explicitly check for this with `notNull` or `assertType`
// - use `equal` for typed comparisons.
// The null view
bytes29 internal constant NULL = hex"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff";
uint256 constant LOW_12_MASK = 0xffffffffffffffffffffffff;
uint8 constant TWELVE_BYTES = 96;
/**
* @notice Returns the encoded hex character that represents the lower 4 bits of the argument.
* @param _b The byte
* @return char - The encoded hex character
*/
function nibbleHex(uint8 _b) internal pure returns (uint8 char) {
// This can probably be done more efficiently, but it's only in error
// paths, so we don't really care :)
uint8 _nibble = _b | 0xf0; // set top 4, keep bottom 4
if (_nibble == 0xf0) {return 0x30;} // 0
if (_nibble == 0xf1) {return 0x31;} // 1
if (_nibble == 0xf2) {return 0x32;} // 2
if (_nibble == 0xf3) {return 0x33;} // 3
if (_nibble == 0xf4) {return 0x34;} // 4
if (_nibble == 0xf5) {return 0x35;} // 5
if (_nibble == 0xf6) {return 0x36;} // 6
if (_nibble == 0xf7) {return 0x37;} // 7
if (_nibble == 0xf8) {return 0x38;} // 8
if (_nibble == 0xf9) {return 0x39;} // 9
if (_nibble == 0xfa) {return 0x61;} // a
if (_nibble == 0xfb) {return 0x62;} // b
if (_nibble == 0xfc) {return 0x63;} // c
if (_nibble == 0xfd) {return 0x64;} // d
if (_nibble == 0xfe) {return 0x65;} // e
if (_nibble == 0xff) {return 0x66;} // f
}
/**
* @notice Returns a uint16 containing the hex-encoded byte.
* `the first 8 bits of encoded is the nibbleHex of top 4 bits of _b`
* `the second 8 bits of encoded is the nibbleHex of lower 4 bits of _b`
* @param _b The byte
* @return encoded - The hex-encoded byte
*/
function byteHex(uint8 _b) internal pure returns (uint16 encoded) {
encoded |= nibbleHex(_b >> 4); // top 4 bits
encoded <<= 8;
encoded |= nibbleHex(_b); // lower 4 bits
}
/**
* @notice Encodes the uint256 to hex. `first` contains the encoded top 16 bytes.
* `second` contains the encoded lower 16 bytes.
*
* @param _b The 32 bytes as uint256
* @return first - The top 16 bytes
* @return second - The bottom 16 bytes
*/
function encodeHex(uint256 _b) internal pure returns (uint256 first, uint256 second) {
for (uint8 i = 31; i > 15; i -= 1) {
uint8 _byte = uint8(_b >> (i * 8));
first |= byteHex(_byte);
if (i != 16) {
first <<= 16;
}
}
unchecked {
// abusing underflow here =_=
for (uint8 i = 15; i < 255 ; i -= 1) {
uint8 _byte = uint8(_b >> (i * 8));
second |= byteHex(_byte);
if (i != 0) {
second <<= 16;
}
}
}
}
/**
* @notice Changes the endianness of a uint256.
* @dev https://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel
* @param _b The unsigned integer to reverse
* @return v - The reversed value
*/
function reverseUint256(uint256 _b) internal pure returns (uint256 v) {
v = _b;
// swap bytes
v = ((v >> 8) & 0x00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF) |
((v & 0x00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF) << 8);
// swap 2-byte long pairs
v = ((v >> 16) & 0x0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF) |
((v & 0x0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF) << 16);
// swap 4-byte long pairs
v = ((v >> 32) & 0x00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF) |
((v & 0x00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF) << 32);
// swap 8-byte long pairs
v = ((v >> 64) & 0x0000000000000000FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF) |
((v & 0x0000000000000000FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF) << 64);
// swap 16-byte long pairs
v = (v >> 128) | (v << 128);
}
/**
* @notice Create a mask with the highest `_len` bits set.
* @param _len The length
* @return mask - The mask
*/
function leftMask(uint8 _len) private pure returns (uint256 mask) {
assembly {
// solium-disable-previous-line security/no-inline-assembly
mask := sar(
sub(_len, 1),
0x8000000000000000000000000000000000000000000000000000000000000000
)
}
}
/**
* @notice Return the null view.
* @return bytes29 - The null view
*/
function nullView() internal pure returns (bytes29) {
return NULL;
}
/**
* @notice Check if the view is null.
* @return bool - True if the view is null
*/
function isNull(bytes29 memView) internal pure returns (bool) {
return memView == NULL;
}
/**
* @notice Check if the view is not null.
* @return bool - True if the view is not null
*/
function notNull(bytes29 memView) internal pure returns (bool) {
return !isNull(memView);
}
/**
* @notice Check if the view is of a valid type and points to a valid location
* in memory.
* @dev We perform this check by examining solidity's unallocated memory
* pointer and ensuring that the view's upper bound is less than that.
* @param memView The view
* @return ret - True if the view is valid
*/
function isValid(bytes29 memView) internal pure returns (bool ret) {
if (typeOf(memView) == 0xffffffffff) {return false;}
uint256 _end = end(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
ret := not(gt(_end, mload(0x40)))
}
}
/**
* @notice Require that a typed memory view be valid.
* @dev Returns the view for easy chaining.
* @param memView The view
* @return bytes29 - The validated view
*/
function assertValid(bytes29 memView) internal pure returns (bytes29) {
require(isValid(memView), "Validity assertion failed");
return memView;
}
/**
* @notice Return true if the memview is of the expected type. Otherwise false.
* @param memView The view
* @param _expected The expected type
* @return bool - True if the memview is of the expected type
*/
function isType(bytes29 memView, uint40 _expected) internal pure returns (bool) {
return typeOf(memView) == _expected;
}
/**
* @notice Require that a typed memory view has a specific type.
* @dev Returns the view for easy chaining.
* @param memView The view
* @param _expected The expected type
* @return bytes29 - The view with validated type
*/
function assertType(bytes29 memView, uint40 _expected) internal pure returns (bytes29) {
if (!isType(memView, _expected)) {
(, uint256 g) = encodeHex(uint256(typeOf(memView)));
(, uint256 e) = encodeHex(uint256(_expected));
string memory err = string(
abi.encodePacked(
"Type assertion failed. Got 0x",
uint80(g),
". Expected 0x",
uint80(e)
)
);
revert(err);
}
return memView;
}
/**
* @notice Return an identical view with a different type.
* @param memView The view
* @param _newType The new type
* @return newView - The new view with the specified type
*/
function castTo(bytes29 memView, uint40 _newType) internal pure returns (bytes29 newView) {
// then | in the new type
assembly {
// solium-disable-previous-line security/no-inline-assembly
// shift off the top 5 bytes
newView := or(newView, shr(40, shl(40, memView)))
newView := or(newView, shl(216, _newType))
}
}
/**
* @notice Unsafe raw pointer construction. This should generally not be called
* directly. Prefer `ref` wherever possible.
* @dev Unsafe raw pointer construction. This should generally not be called
* directly. Prefer `ref` wherever possible.
* @param _type The type
* @param _loc The memory address
* @param _len The length
* @return newView - The new view with the specified type, location and length
*/
function unsafeBuildUnchecked(uint256 _type, uint256 _loc, uint256 _len) private pure returns (bytes29 newView) {
assembly {
// solium-disable-previous-line security/no-inline-assembly
newView := shl(96, or(newView, _type)) // insert type
newView := shl(96, or(newView, _loc)) // insert loc
newView := shl(24, or(newView, _len)) // empty bottom 3 bytes
}
}
/**
* @notice Instantiate a new memory view. This should generally not be called
* directly. Prefer `ref` wherever possible.
* @dev Instantiate a new memory view. This should generally not be called
* directly. Prefer `ref` wherever possible.
* @param _type The type
* @param _loc The memory address
* @param _len The length
* @return newView - The new view with the specified type, location and length
*/
function build(uint256 _type, uint256 _loc, uint256 _len) internal pure returns (bytes29 newView) {
uint256 _end = _loc + _len;
assembly {
// solium-disable-previous-line security/no-inline-assembly
if gt(_end, mload(0x40)) {
_end := 0
}
}
if (_end == 0) {
return NULL;
}
newView = unsafeBuildUnchecked(_type, _loc, _len);
}
/**
* @notice Instantiate a memory view from a byte array.
* @dev Note that due to Solidity memory representation, it is not possible to
* implement a deref, as the `bytes` type stores its len in memory.
* @param arr The byte array
* @param newType The type
* @return bytes29 - The memory view
*/
function ref(bytes memory arr, uint40 newType) internal pure returns (bytes29) {
uint256 _len = arr.length;
uint256 _loc;
assembly {
// solium-disable-previous-line security/no-inline-assembly
_loc := add(arr, 0x20) // our view is of the data, not the struct
}
return build(newType, _loc, _len);
}
/**
* @notice Return the associated type information.
* @param memView The memory view
* @return _type - The type associated with the view
*/
function typeOf(bytes29 memView) internal pure returns (uint40 _type) {
assembly {
// solium-disable-previous-line security/no-inline-assembly
// 216 == 256 - 40
_type := shr(216, memView) // shift out lower (12 + 12 + 3) bytes
}
}
/**
* @notice Optimized type comparison. Checks that the 5-byte type flag is equal.
* @param left The first view
* @param right The second view
* @return bool - True if the 5-byte type flag is equal
*/
function sameType(bytes29 left, bytes29 right) internal pure returns (bool) {
// XOR the inputs to check their difference
return (left ^ right) >> (2 * TWELVE_BYTES) == 0;
}
/**
* @notice Return the memory address of the underlying bytes.
* @param memView The view
* @return _loc - The memory address
*/
function loc(bytes29 memView) internal pure returns (uint96 _loc) {
uint256 _mask = LOW_12_MASK; // assembly can't use globals
assembly {
// solium-disable-previous-line security/no-inline-assembly
// 120 bits = 12 bytes (the encoded loc) + 3 bytes (empty low space)
_loc := and(shr(120, memView), _mask)
}
}
/**
* @notice The number of memory words this memory view occupies, rounded up.
* @param memView The view
* @return uint256 - The number of memory words
*/
function words(bytes29 memView) internal pure returns (uint256) {
return (uint256(len(memView)) + 32) / 32;
}
/**
* @notice The in-memory footprint of a fresh copy of the view.
* @param memView The view
* @return uint256 - The in-memory footprint of a fresh copy of the view.
*/
function footprint(bytes29 memView) internal pure returns (uint256) {
return words(memView) * 32;
}
/**
* @notice The number of bytes of the view.
* @param memView The view
* @return _len - The length of the view
*/
function len(bytes29 memView) internal pure returns (uint96 _len) {
uint256 _mask = LOW_12_MASK; // assembly can't use globals
assembly {
// solium-disable-previous-line security/no-inline-assembly
_len := and(shr(24, memView), _mask)
}
}
/**
* @notice Returns the endpoint of `memView`.
* @param memView The view
* @return uint256 - The endpoint of `memView`
*/
function end(bytes29 memView) internal pure returns (uint256) {
return loc(memView) + len(memView);
}
/**
* @notice Safe slicing without memory modification.
* @param memView The view
* @param _index The start index
* @param _len The length
* @param newType The new type
* @return bytes29 - The new view
*/
function slice(bytes29 memView, uint256 _index, uint256 _len, uint40 newType) internal pure returns (bytes29) {
uint256 _loc = loc(memView);
// Ensure it doesn't overrun the view
if (_loc + _index + _len > end(memView)) {
return NULL;
}
_loc = _loc + _index;
return build(newType, _loc, _len);
}
/**
* @notice Shortcut to `slice`. Gets a view representing the first `_len` bytes.
* @param memView The view
* @param _len The length
* @param newType The new type
* @return bytes29 - The new view
*/
function prefix(bytes29 memView, uint256 _len, uint40 newType) internal pure returns (bytes29) {
return slice(memView, 0, _len, newType);
}
/**
* @notice Shortcut to `slice`. Gets a view representing the last `_len` bytes.
* @param memView The view
* @param _len The length
* @param newType The new type
* @return bytes29 - The new view
*/
function postfix(bytes29 memView, uint256 _len, uint40 newType) internal pure returns (bytes29) {
return slice(memView, uint256(len(memView)) - _len, _len, newType);
}
/**
* @notice Construct an error message for an indexing overrun.
* @param _loc The memory address
* @param _len The length
* @param _index The index
* @param _slice The slice where the overrun occurred
* @return err - The err
*/
function indexErrOverrun(
uint256 _loc,
uint256 _len,
uint256 _index,
uint256 _slice
) internal pure returns (string memory err) {
(, uint256 a) = encodeHex(_loc);
(, uint256 b) = encodeHex(_len);
(, uint256 c) = encodeHex(_index);
(, uint256 d) = encodeHex(_slice);
err = string(
abi.encodePacked(
"TypedMemView/index - Overran the view. Slice is at 0x",
uint48(a),
" with length 0x",
uint48(b),
". Attempted to index at offset 0x",
uint48(c),
" with length 0x",
uint48(d),
"."
)
);
}
/**
* @notice Load up to 32 bytes from the view onto the stack.
* @dev Returns a bytes32 with only the `_bytes` highest bytes set.
* This can be immediately cast to a smaller fixed-length byte array.
* To automatically cast to an integer, use `indexUint`.
* @param memView The view
* @param _index The index
* @param _bytes The bytes length
* @return result - The 32 byte result
*/
function index(bytes29 memView, uint256 _index, uint8 _bytes) internal pure returns (bytes32 result) {
if (_bytes == 0) {return bytes32(0);}
if (_index + _bytes > len(memView)) {
revert(indexErrOverrun(loc(memView), len(memView), _index, uint256(_bytes)));
}
require(_bytes <= 32, "TypedMemView/index - Attempted to index more than 32 bytes");
unchecked {
uint8 bitLength = _bytes * 8;
uint256 _loc = loc(memView);
uint256 _mask = leftMask(bitLength);
assembly {
// solium-disable-previous-line security/no-inline-assembly
result := and(mload(add(_loc, _index)), _mask)
}
}
}
/**
* @notice Parse an unsigned integer from the view at `_index`.
* @dev Requires that the view has >= `_bytes` bytes following that index.
* @param memView The view
* @param _index The index
* @param _bytes The bytes length
* @return result - The unsigned integer
*/
function indexUint(bytes29 memView, uint256 _index, uint8 _bytes) internal pure returns (uint256 result) {
return uint256(index(memView, _index, _bytes)) >> ((32 - _bytes) * 8);
}
/**
* @notice Parse an unsigned integer from LE bytes.
* @param memView The view
* @param _index The index
* @param _bytes The bytes length
* @return result - The unsigned integer
*/
function indexLEUint(bytes29 memView, uint256 _index, uint8 _bytes) internal pure returns (uint256 result) {
return reverseUint256(uint256(index(memView, _index, _bytes)));
}
/**
* @notice Parse an address from the view at `_index`. Requires that the view have >= 20 bytes
* following that index.
* @param memView The view
* @param _index The index
* @return address - The address
*/
function indexAddress(bytes29 memView, uint256 _index) internal pure returns (address) {
return address(uint160(indexUint(memView, _index, 20)));
}
/**
* @notice Return the keccak256 hash of the underlying memory
* @param memView The view
* @return digest - The keccak256 hash of the underlying memory
*/
function keccak(bytes29 memView) internal pure returns (bytes32 digest) {
uint256 _loc = loc(memView);
uint256 _len = len(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
digest := keccak256(_loc, _len)
}
}
/**
* @notice Return the sha2 digest of the underlying memory.
* @dev We explicitly deallocate memory afterwards.
* @param memView The view
* @return digest - The sha2 hash of the underlying memory
*/
function sha2(bytes29 memView) internal view returns (bytes32 digest) {
uint256 _loc = loc(memView);
uint256 _len = len(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
let ptr := mload(0x40)
pop(staticcall(gas(), 2, _loc, _len, ptr, 0x20)) // sha2 #1
digest := mload(ptr)
}
}
/**
* @notice Implements bitcoin's hash160 (rmd160(sha2()))
* @param memView The pre-image
* @return digest - the Digest
*/
function hash160(bytes29 memView) internal view returns (bytes20 digest) {
uint256 _loc = loc(memView);
uint256 _len = len(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
let ptr := mload(0x40)
pop(staticcall(gas(), 2, _loc, _len, ptr, 0x20)) // sha2
pop(staticcall(gas(), 3, ptr, 0x20, ptr, 0x20)) // rmd160
digest := mload(add(ptr, 0xc)) // return value is 0-prefixed.
}
}
/**
* @notice Implements bitcoin's hash256 (double sha2)
* @param memView A view of the preimage
* @return digest - the Digest
*/
function hash256(bytes29 memView) internal view returns (bytes32 digest) {
uint256 _loc = loc(memView);
uint256 _len = len(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
let ptr := mload(0x40)
pop(staticcall(gas(), 2, _loc, _len, ptr, 0x20)) // sha2 #1
pop(staticcall(gas(), 2, ptr, 0x20, ptr, 0x20)) // sha2 #2
digest := mload(ptr)
}
}
/**
* @notice Return true if the underlying memory is equal. Else false.
* @param left The first view
* @param right The second view
* @return bool - True if the underlying memory is equal
*/
function untypedEqual(bytes29 left, bytes29 right) internal pure returns (bool) {
return (loc(left) == loc(right) && len(left) == len(right)) || keccak(left) == keccak(right);
}
/**
* @notice Return false if the underlying memory is equal. Else true.
* @param left The first view
* @param right The second view
* @return bool - False if the underlying memory is equal
*/
function untypedNotEqual(bytes29 left, bytes29 right) internal pure returns (bool) {
return !untypedEqual(left, right);
}
/**
* @notice Compares type equality.
* @dev Shortcuts if the pointers are identical, otherwise compares type and digest.
* @param left The first view
* @param right The second view
* @return bool - True if the types are the same
*/
function equal(bytes29 left, bytes29 right) internal pure returns (bool) {
return left == right || (typeOf(left) == typeOf(right) && keccak(left) == keccak(right));
}
/**
* @notice Compares type inequality.
* @dev Shortcuts if the pointers are identical, otherwise compares type and digest.
* @param left The first view
* @param right The second view
* @return bool - True if the types are not the same
*/
function notEqual(bytes29 left, bytes29 right) internal pure returns (bool) {
return !equal(left, right);
}
/**
* @notice Copy the view to a location, return an unsafe memory reference
* @dev Super Dangerous direct memory access.
*
* This reference can be overwritten if anything else modifies memory (!!!).
* As such it MUST be consumed IMMEDIATELY.
* This function is private to prevent unsafe usage by callers.
* @param memView The view
* @param _newLoc The new location
* @return written - the unsafe memory reference
*/
function unsafeCopyTo(bytes29 memView, uint256 _newLoc) private view returns (bytes29 written) {
require(notNull(memView), "TypedMemView/copyTo - Null pointer deref");
require(isValid(memView), "TypedMemView/copyTo - Invalid pointer deref");
uint256 _len = len(memView);
uint256 _oldLoc = loc(memView);
uint256 ptr;
assembly {
// solium-disable-previous-line security/no-inline-assembly
ptr := mload(0x40)
// revert if we're writing in occupied memory
if gt(ptr, _newLoc) {
revert(0x60, 0x20) // empty revert message
}
// use the identity precompile to copy
// guaranteed not to fail, so pop the success
pop(staticcall(gas(), 4, _oldLoc, _len, _newLoc, _len))
}
written = unsafeBuildUnchecked(typeOf(memView), _newLoc, _len);
}
/**
* @notice Copies the referenced memory to a new loc in memory, returning a `bytes` pointing to
* the new memory
* @dev Shortcuts if the pointers are identical, otherwise compares type and digest.
* @param memView The view
* @return ret - The view pointing to the new memory
*/
function clone(bytes29 memView) internal view returns (bytes memory ret) {
uint256 ptr;
uint256 _len = len(memView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
ptr := mload(0x40) // load unused memory pointer
ret := ptr
}
unsafeCopyTo(memView, ptr + 0x20);
assembly {
// solium-disable-previous-line security/no-inline-assembly
mstore(0x40, add(add(ptr, _len), 0x20)) // write new unused pointer
mstore(ptr, _len) // write len of new array (in bytes)
}
}
/**
* @notice Join the views in memory, return an unsafe reference to the memory.
* @dev Super Dangerous direct memory access.
*
* This reference can be overwritten if anything else modifies memory (!!!).
* As such it MUST be consumed IMMEDIATELY.
* This function is private to prevent unsafe usage by callers.
* @param memViews The views
* @return unsafeView - The conjoined view pointing to the new memory
*/
function unsafeJoin(bytes29[] memory memViews, uint256 _location) private view returns (bytes29 unsafeView) {
assembly {
// solium-disable-previous-line security/no-inline-assembly
let ptr := mload(0x40)
// revert if we're writing in occupied memory
if gt(ptr, _location) {
revert(0x60, 0x20) // empty revert message
}
}
uint256 _offset = 0;
for (uint256 i = 0; i < memViews.length; i ++) {
bytes29 memView = memViews[i];
unsafeCopyTo(memView, _location + _offset);
_offset += len(memView);
}
unsafeView = unsafeBuildUnchecked(0, _location, _offset);
}
/**
* @notice Produce the keccak256 digest of the concatenated contents of multiple views.
* @param memViews The views
* @return bytes32 - The keccak256 digest
*/
function joinKeccak(bytes29[] memory memViews) internal view returns (bytes32) {
uint256 ptr;
assembly {
// solium-disable-previous-line security/no-inline-assembly
ptr := mload(0x40) // load unused memory pointer
}
return keccak(unsafeJoin(memViews, ptr));
}
/**
* @notice Produce the sha256 digest of the concatenated contents of multiple views.
* @param memViews The views
* @return bytes32 - The sha256 digest
*/
function joinSha2(bytes29[] memory memViews) internal view returns (bytes32) {
uint256 ptr;
assembly {
// solium-disable-previous-line security/no-inline-assembly
ptr := mload(0x40) // load unused memory pointer
}
return sha2(unsafeJoin(memViews, ptr));
}
/**
* @notice copies all views, joins them into a new bytearray.
* @param memViews The views
* @return ret - The new byte array
*/
function join(bytes29[] memory memViews) internal view returns (bytes memory ret) {
uint256 ptr;
assembly {
// solium-disable-previous-line security/no-inline-assembly
ptr := mload(0x40) // load unused memory pointer
}
bytes29 _newView = unsafeJoin(memViews, ptr + 0x20);
uint256 _written = len(_newView);
uint256 _footprint = footprint(_newView);
assembly {
// solium-disable-previous-line security/no-inline-assembly
// store the legnth
mstore(ptr, _written)
// new pointer is old + 0x20 + the footprint of the body
mstore(0x40, add(add(ptr, _footprint), 0x20))
ret := ptr
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
enum ScriptTypes {
P2PK, // 32 bytes
P2PKH, // 20 bytes
P2SH, // 20 bytes
P2WPKH, // 20 bytes
P2WSH // 32 bytes
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toUint224(uint256 value) internal pure returns (uint224) {
require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
return uint224(value);
}
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toUint96(uint256 value) internal pure returns (uint96) {
require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
return uint96(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}// SPDX-License-Identifier: MIT
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);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "../../types/DataTypes.sol";
interface ILockersStorage {
// Read-only functions
function TeleportDAOToken() external view returns(address);
function teleBTC() external view returns(address);
function ccBurnRouter() external view returns(address);
function exchangeConnector() external view returns(address);
function priceOracle() external view returns(address);
function minRequiredTDTLockedAmount() external view returns(uint);
function minRequiredTNTLockedAmount() external view returns(uint);
function lockerPercentageFee() external view returns(uint);
function collateralRatio() external view returns(uint);
function liquidationRatio() external view returns(uint);
function priceWithDiscountRatio() external view returns(uint);
function totalNumberOfCandidates() external view returns(uint);
function totalNumberOfLockers() external view returns(uint);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.8.4;
import "./ScriptTypesEnum.sol";
library DataTypes {
/// @notice Structure for registering lockers
/// @dev
/// @param lockerLockingScript Locker redeem script
/// @param lockerRescueType Locker script type in case of getting BTCs back
/// @param lockerRescueScript Locker script in case of getting BTCs back
/// @param TDTLockedAmount Bond amount of locker in TDT
/// @param nativeTokenLockedAmount Bond amount of locker in native token of the target chain
/// @param netMinted Total minted - total burnt
/// @param slashingTeleBTCAmount Total amount of teleBTC a locker must be slashed
/// @param reservedNativeTokenForSlash Total native token reserved to support slashing teleBTC
/// @param isLocker Indicates that is already a locker or not
/// @param isCandidate Indicates that is a candidate or not
/// @param isScriptHash Shows if it's script hash
/// has enough collateral to accept more minting requests)
struct locker {
bytes lockerLockingScript;
ScriptTypes lockerRescueType;
bytes lockerRescueScript;
uint TDTLockedAmount;
uint nativeTokenLockedAmount;
uint netMinted;
uint slashingTeleBTCAmount;
uint reservedNativeTokenForSlash;
bool isLocker;
bool isCandidate;
bool isScriptHash;
}
struct lockersLibConstants {
uint OneHundredPercent;
uint HealthFactor;
uint UpperHealthFactor;
uint MaxLockerFee;
uint NativeTokenDecimal;
address NativeToken;
}
struct lockersLibParam {
address teleportDAOToken;
address teleBTC;
address ccBurnRouter;
address exchangeConnector;
address priceOracle;
uint minRequiredTDTLockedAmount;
uint minRequiredTNTLockedAmount;
uint lockerPercentageFee;
uint collateralRatio;
uint liquidationRatio;
uint priceWithDiscountRatio;
uint inactivationDelay;
}
}// SPDX-License-Identifier: MIT
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;
}
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"metadata": {
"useLiteralContent": true
},
"libraries": {}
}[{"inputs":[{"internalType":"uint256","name":"_startingBlockNumber","type":"uint256"},{"internalType":"uint256","name":"_protocolPercentageFee","type":"uint256"},{"internalType":"uint256","name":"_chainId","type":"uint256"},{"internalType":"uint256","name":"_appId","type":"uint256"},{"internalType":"address","name":"_relay","type":"address"},{"internalType":"address","name":"_lockers","type":"address"},{"internalType":"address","name":"_teleBTC","type":"address"},{"internalType":"address","name":"_treasury","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes","name":"lockerLockingScript","type":"bytes"},{"indexed":false,"internalType":"uint256","name":"lockerScriptType","type":"uint256"},{"indexed":false,"internalType":"address","name":"lockerTargetAddress","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"inputAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"receivedAmount","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"speed","type":"uint256"},{"indexed":false,"internalType":"address","name":"teleporter","type":"address"},{"indexed":false,"internalType":"uint256","name":"teleporterFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"relayFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"protocolFee","type":"uint256"},{"indexed":false,"internalType":"bytes32","name":"bitcoinTxId","type":"bytes32"}],"name":"CCTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldInstantRouter","type":"address"},{"indexed":false,"internalType":"address","name":"newInstantRouter","type":"address"}],"name":"NewInstantRouter","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldLockers","type":"address"},{"indexed":false,"internalType":"address","name":"newLockers","type":"address"}],"name":"NewLockers","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"oldProtocolPercentageFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newProtocolPercentageFee","type":"uint256"}],"name":"NewProtocolPercentageFee","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldRelay","type":"address"},{"indexed":false,"internalType":"address","name":"newRelay","type":"address"}],"name":"NewRelay","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldTeleBTC","type":"address"},{"indexed":false,"internalType":"address","name":"newTeleBTC","type":"address"}],"name":"NewTeleBTC","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldTreasury","type":"address"},{"indexed":false,"internalType":"address","name":"newTreasury","type":"address"}],"name":"NewTreasury","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"appId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_version","type":"bytes4"},{"internalType":"bytes","name":"_vin","type":"bytes"},{"internalType":"bytes","name":"_vout","type":"bytes"},{"internalType":"bytes4","name":"_locktime","type":"bytes4"},{"internalType":"uint256","name":"_blockNumber","type":"uint256"},{"internalType":"bytes","name":"_intermediateNodes","type":"bytes"},{"internalType":"uint256","name":"_index","type":"uint256"},{"internalType":"bytes","name":"_lockerLockingScript","type":"bytes"}],"name":"ccTransfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"ccTransferRequests","outputs":[{"internalType":"uint256","name":"inputAmount","type":"uint256"},{"internalType":"address","name":"recipientAddress","type":"address"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"uint256","name":"speed","type":"uint256"},{"internalType":"bool","name":"isUsed","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"chainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"instantRouter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_txId","type":"bytes32"}],"name":"isRequestUsed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lockers","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolPercentageFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"relay","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_instantRouter","type":"address"}],"name":"setInstantRouter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_lockers","type":"address"}],"name":"setLockers","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_protocolPercentageFee","type":"uint256"}],"name":"setProtocolPercentageFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_relay","type":"address"}],"name":"setRelay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_teleBTC","type":"address"}],"name":"setTeleBTC","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_treasury","type":"address"}],"name":"setTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startingBlockNumber","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"teleBTC","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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