Address Details
contract
0x4Bb82B5862Beb483Fdb762EC4A6cB60953568A12
- Contract Name
- DoubleSigningSlasher
- Creator
- 0xf3eb91–a79239 at 0x6de9e3–996e34
- Balance
- 0 CELO ( )
- Locked CELO Balance
- 0.00 CELO
- Voting CELO Balance
- 0.00 CELO
- Pending Unlocked Gold
- 0.00 CELO
- Tokens
-
Fetching tokens...
- Transactions
- 0 Transactions
- Transfers
- 0 Transfers
- Gas Used
- Fetching gas used...
- Last Balance Update
- 3492064
This contract has been partially verified via Sourcify.
View contract in Sourcify repository
- Contract name:
- DoubleSigningSlasher
- Optimization enabled
- false
- Compiler version
- v0.5.13+commit.5b0b510c
- EVM Version
- istanbul
- Verified at
- 2021-10-19T10:18:38.813617Z
Contract source code
pragma solidity ^0.5.13; import "openzeppelin-solidity/contracts/math/SafeMath.sol"; import "../common/interfaces/ICeloVersionedContract.sol"; import "./SlasherUtil.sol"; contract DoubleSigningSlasher is ICeloVersionedContract, SlasherUtil { using SafeMath for uint256; // For each signer address, check if a block header has already been slashed mapping(address => mapping(bytes32 => bool)) isSlashed; event SlashingIncentivesSet(uint256 penalty, uint256 reward); event DoubleSigningSlashPerformed(address indexed validator, uint256 indexed blockNumber); /** * @notice Returns the storage, major, minor, and patch version of the contract. * @return The storage, major, minor, and patch version of the contract. */ function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256) { return (1, 1, 1, 0); } /** * @notice Sets initialized == true on implementation contracts * @param test Set to true to skip implementation initialization */ constructor(bool test) public SlasherUtil(test) {} /** * @notice Used in place of the constructor to allow the contract to be upgradable via proxy. * @param registryAddress The address of the registry core smart contract. * @param _penalty Penalty for the slashed signer. * @param _reward Reward that the observer gets. */ function initialize(address registryAddress, uint256 _penalty, uint256 _reward) external initializer { _transferOwnership(msg.sender); setRegistry(registryAddress); setSlashingIncentives(_penalty, _reward); } /** * @notice Counts the number of set bits (Hamming weight). * @param v Bitmap. * @return Number of set bits. */ function countSetBits(uint256 v) internal pure returns (uint256) { uint256 res = 0; uint256 acc = v; for (uint256 i = 0; i < 256; i = i.add(1)) { if (acc & 1 == 1) res = res.add(1); acc = acc >> 1; } return res; } /** * @notice Given two RLP encoded blocks, calls into precompiles to require that * the two block hashes are different, have the same height, have a * quorum of signatures, and that `signer` was part of the quorum. * @param signer The signer to be slashed. * @param index Validator index at the block. * @param headerA First double signed block header. * @param headerB Second double signed block header. * @return Block number where double signing occured. Throws if no double signing is detected. */ function checkForDoubleSigning( address signer, uint256 index, bytes memory headerA, bytes memory headerB ) public view returns (uint256) { require(hashHeader(headerA) != hashHeader(headerB), "Block hashes have to be different"); uint256 blockNumber = getBlockNumberFromHeader(headerA); require( blockNumber == getBlockNumberFromHeader(headerB), "Block headers are from different height" ); require(index < numberValidatorsInSet(blockNumber), "Bad validator index"); require( signer == validatorSignerAddressFromSet(index, blockNumber), "Wasn't a signer with given index" ); uint256 mapA = uint256(getVerifiedSealBitmapFromHeader(headerA)); uint256 mapB = uint256(getVerifiedSealBitmapFromHeader(headerB)); require(mapA & (1 << index) != 0, "Didn't sign first block"); require(mapB & (1 << index) != 0, "Didn't sign second block"); require( countSetBits(mapA) >= minQuorumSize(blockNumber), "Not enough signers in the first block" ); require( countSetBits(mapB) >= minQuorumSize(blockNumber), "Not enough signers in the second block" ); return blockNumber; } function checkIfAlreadySlashed(address signer, bytes memory header) internal { bytes32 bhash = hashHeader(header); require(!isSlashed[signer][bhash], "Already slashed"); isSlashed[signer][bhash] = true; } /** * @notice Requires that `eval` returns true and that this evidence has not * already been used to slash `signer`. * If so, fetches the `account` associated with `signer` and the group that * `signer` was a member of during the corresponding epoch. * Then, calls `LockedGold.slash` on both the validator and group accounts. * Calls `Validators.removeSlashedMember` to remove the validator from its * current group if it is a member of one. * Finally, stores that hash(signer, blockNumber) has been slashed. * @param signer The signer to be slashed. * @param index Validator index at the block. * @param headerA First double signed block header. * @param headerB Second double signed block header. * @param groupMembershipHistoryIndex Group membership index from where the group should be found. * @param validatorElectionLessers Lesser pointers for validator slashing. * @param validatorElectionGreaters Greater pointers for validator slashing. * @param validatorElectionIndices Vote indices for validator slashing. * @param groupElectionLessers Lesser pointers for group slashing. * @param groupElectionGreaters Greater pointers for group slashing. * @param groupElectionIndices Vote indices for group slashing. */ function slash( address signer, uint256 index, bytes memory headerA, bytes memory headerB, uint256 groupMembershipHistoryIndex, address[] memory validatorElectionLessers, address[] memory validatorElectionGreaters, uint256[] memory validatorElectionIndices, address[] memory groupElectionLessers, address[] memory groupElectionGreaters, uint256[] memory groupElectionIndices ) public { checkIfAlreadySlashed(signer, headerA); checkIfAlreadySlashed(signer, headerB); uint256 blockNumber = checkForDoubleSigning(signer, index, headerA, headerB); address validator = getAccounts().signerToAccount(signer); performSlashing( validator, msg.sender, blockNumber, groupMembershipHistoryIndex, validatorElectionLessers, validatorElectionGreaters, validatorElectionIndices, groupElectionLessers, groupElectionGreaters, groupElectionIndices ); emit DoubleSigningSlashPerformed(validator, blockNumber); } }
Initializable.sol
pragma solidity ^0.5.13; contract Initializable { bool public initialized; constructor(bool testingDeployment) public { if (!testingDeployment) { initialized = true; } } modifier initializer() { require(!initialized, "contract already initialized"); initialized = true; _; } }
UsingPrecompiles.sol
pragma solidity ^0.5.13; import "openzeppelin-solidity/contracts/math/SafeMath.sol"; import "../common/interfaces/ICeloVersionedContract.sol"; contract UsingPrecompiles { using SafeMath for uint256; address constant TRANSFER = address(0xff - 2); address constant FRACTION_MUL = address(0xff - 3); address constant PROOF_OF_POSSESSION = address(0xff - 4); address constant GET_VALIDATOR = address(0xff - 5); address constant NUMBER_VALIDATORS = address(0xff - 6); address constant EPOCH_SIZE = address(0xff - 7); address constant BLOCK_NUMBER_FROM_HEADER = address(0xff - 8); address constant HASH_HEADER = address(0xff - 9); address constant GET_PARENT_SEAL_BITMAP = address(0xff - 10); address constant GET_VERIFIED_SEAL_BITMAP = address(0xff - 11); /** * @notice calculate a * b^x for fractions a, b to `decimals` precision * @param aNumerator Numerator of first fraction * @param aDenominator Denominator of first fraction * @param bNumerator Numerator of exponentiated fraction * @param bDenominator Denominator of exponentiated fraction * @param exponent exponent to raise b to * @param _decimals precision * @return numerator/denominator of the computed quantity (not reduced). */ function fractionMulExp( uint256 aNumerator, uint256 aDenominator, uint256 bNumerator, uint256 bDenominator, uint256 exponent, uint256 _decimals ) public view returns (uint256, uint256) { require(aDenominator != 0 && bDenominator != 0, "a denominator is zero"); uint256 returnNumerator; uint256 returnDenominator; bool success; bytes memory out; (success, out) = FRACTION_MUL.staticcall( abi.encodePacked(aNumerator, aDenominator, bNumerator, bDenominator, exponent, _decimals) ); require(success, "error calling fractionMulExp precompile"); returnNumerator = getUint256FromBytes(out, 0); returnDenominator = getUint256FromBytes(out, 32); return (returnNumerator, returnDenominator); } /** * @notice Returns the current epoch size in blocks. * @return The current epoch size in blocks. */ function getEpochSize() public view returns (uint256) { bytes memory out; bool success; (success, out) = EPOCH_SIZE.staticcall(abi.encodePacked()); require(success, "error calling getEpochSize precompile"); return getUint256FromBytes(out, 0); } /** * @notice Returns the epoch number at a block. * @param blockNumber Block number where epoch number is calculated. * @return Epoch number. */ function getEpochNumberOfBlock(uint256 blockNumber) public view returns (uint256) { return epochNumberOfBlock(blockNumber, getEpochSize()); } /** * @notice Returns the epoch number at a block. * @return Current epoch number. */ function getEpochNumber() public view returns (uint256) { return getEpochNumberOfBlock(block.number); } /** * @notice Returns the epoch number at a block. * @param blockNumber Block number where epoch number is calculated. * @param epochSize The epoch size in blocks. * @return Epoch number. */ function epochNumberOfBlock(uint256 blockNumber, uint256 epochSize) internal pure returns (uint256) { // Follows GetEpochNumber from celo-blockchain/blob/master/consensus/istanbul/utils.go uint256 epochNumber = blockNumber / epochSize; if (blockNumber % epochSize == 0) { return epochNumber; } else { return epochNumber.add(1); } } /** * @notice Gets a validator address from the current validator set. * @param index Index of requested validator in the validator set. * @return Address of validator at the requested index. */ function validatorSignerAddressFromCurrentSet(uint256 index) public view returns (address) { bytes memory out; bool success; (success, out) = GET_VALIDATOR.staticcall(abi.encodePacked(index, uint256(block.number))); require(success, "error calling validatorSignerAddressFromCurrentSet precompile"); return address(getUint256FromBytes(out, 0)); } /** * @notice Gets a validator address from the validator set at the given block number. * @param index Index of requested validator in the validator set. * @param blockNumber Block number to retrieve the validator set from. * @return Address of validator at the requested index. */ function validatorSignerAddressFromSet(uint256 index, uint256 blockNumber) public view returns (address) { bytes memory out; bool success; (success, out) = GET_VALIDATOR.staticcall(abi.encodePacked(index, blockNumber)); require(success, "error calling validatorSignerAddressFromSet precompile"); return address(getUint256FromBytes(out, 0)); } /** * @notice Gets the size of the current elected validator set. * @return Size of the current elected validator set. */ function numberValidatorsInCurrentSet() public view returns (uint256) { bytes memory out; bool success; (success, out) = NUMBER_VALIDATORS.staticcall(abi.encodePacked(uint256(block.number))); require(success, "error calling numberValidatorsInCurrentSet precompile"); return getUint256FromBytes(out, 0); } /** * @notice Gets the size of the validator set that must sign the given block number. * @param blockNumber Block number to retrieve the validator set from. * @return Size of the validator set. */ function numberValidatorsInSet(uint256 blockNumber) public view returns (uint256) { bytes memory out; bool success; (success, out) = NUMBER_VALIDATORS.staticcall(abi.encodePacked(blockNumber)); require(success, "error calling numberValidatorsInSet precompile"); return getUint256FromBytes(out, 0); } /** * @notice Checks a BLS proof of possession. * @param sender The address signed by the BLS key to generate the proof of possession. * @param blsKey The BLS public key that the validator is using for consensus, should pass proof * of possession. 48 bytes. * @param blsPop The BLS public key proof-of-possession, which consists of a signature on the * account address. 96 bytes. * @return True upon success. */ function checkProofOfPossession(address sender, bytes memory blsKey, bytes memory blsPop) public view returns (bool) { bool success; (success, ) = PROOF_OF_POSSESSION.staticcall(abi.encodePacked(sender, blsKey, blsPop)); return success; } /** * @notice Parses block number out of header. * @param header RLP encoded header * @return Block number. */ function getBlockNumberFromHeader(bytes memory header) public view returns (uint256) { bytes memory out; bool success; (success, out) = BLOCK_NUMBER_FROM_HEADER.staticcall(abi.encodePacked(header)); require(success, "error calling getBlockNumberFromHeader precompile"); return getUint256FromBytes(out, 0); } /** * @notice Computes hash of header. * @param header RLP encoded header * @return Header hash. */ function hashHeader(bytes memory header) public view returns (bytes32) { bytes memory out; bool success; (success, out) = HASH_HEADER.staticcall(abi.encodePacked(header)); require(success, "error calling hashHeader precompile"); return getBytes32FromBytes(out, 0); } /** * @notice Gets the parent seal bitmap from the header at the given block number. * @param blockNumber Block number to retrieve. Must be within 4 epochs of the current number. * @return Bitmap parent seal with set bits at indices corresponding to signing validators. */ function getParentSealBitmap(uint256 blockNumber) public view returns (bytes32) { bytes memory out; bool success; (success, out) = GET_PARENT_SEAL_BITMAP.staticcall(abi.encodePacked(blockNumber)); require(success, "error calling getParentSealBitmap precompile"); return getBytes32FromBytes(out, 0); } /** * @notice Verifies the BLS signature on the header and returns the seal bitmap. * The validator set used for verification is retrieved based on the parent hash field of the * header. If the parent hash is not in the blockchain, verification fails. * @param header RLP encoded header * @return Bitmap parent seal with set bits at indices correspoinding to signing validators. */ function getVerifiedSealBitmapFromHeader(bytes memory header) public view returns (bytes32) { bytes memory out; bool success; (success, out) = GET_VERIFIED_SEAL_BITMAP.staticcall(abi.encodePacked(header)); require(success, "error calling getVerifiedSealBitmapFromHeader precompile"); return getBytes32FromBytes(out, 0); } /** * @notice Converts bytes to uint256. * @param bs byte[] data * @param start offset into byte data to convert * @return uint256 data */ function getUint256FromBytes(bytes memory bs, uint256 start) internal pure returns (uint256) { return uint256(getBytes32FromBytes(bs, start)); } /** * @notice Converts bytes to bytes32. * @param bs byte[] data * @param start offset into byte data to convert * @return bytes32 data */ function getBytes32FromBytes(bytes memory bs, uint256 start) internal pure returns (bytes32) { require(bs.length >= start.add(32), "slicing out of range"); bytes32 x; assembly { x := mload(add(bs, add(start, 32))) } return x; } /** * @notice Returns the minimum number of required signers for a given block number. * @dev Computed in celo-blockchain as int(math.Ceil(float64(2*valSet.Size()) / 3)) */ function minQuorumSize(uint256 blockNumber) public view returns (uint256) { return numberValidatorsInSet(blockNumber).mul(2).add(2).div(3); } /** * @notice Computes byzantine quorum from current validator set size * @return Byzantine quorum of validators. */ function minQuorumSizeInCurrentSet() public view returns (uint256) { return minQuorumSize(block.number); } }
UsingRegistry.sol
pragma solidity ^0.5.13; import "openzeppelin-solidity/contracts/ownership/Ownable.sol"; import "openzeppelin-solidity/contracts/token/ERC20/IERC20.sol"; import "./interfaces/IAccounts.sol"; import "./interfaces/IFeeCurrencyWhitelist.sol"; import "./interfaces/IFreezer.sol"; import "./interfaces/IRegistry.sol"; import "../governance/interfaces/IElection.sol"; import "../governance/interfaces/IGovernance.sol"; import "../governance/interfaces/ILockedGold.sol"; import "../governance/interfaces/IValidators.sol"; import "../identity/interfaces/IRandom.sol"; import "../identity/interfaces/IAttestations.sol"; import "../stability/interfaces/IExchange.sol"; import "../stability/interfaces/IReserve.sol"; import "../stability/interfaces/ISortedOracles.sol"; import "../stability/interfaces/IStableToken.sol"; contract UsingRegistry is Ownable { event RegistrySet(address indexed registryAddress); // solhint-disable state-visibility bytes32 constant ACCOUNTS_REGISTRY_ID = keccak256(abi.encodePacked("Accounts")); bytes32 constant ATTESTATIONS_REGISTRY_ID = keccak256(abi.encodePacked("Attestations")); bytes32 constant DOWNTIME_SLASHER_REGISTRY_ID = keccak256(abi.encodePacked("DowntimeSlasher")); bytes32 constant DOUBLE_SIGNING_SLASHER_REGISTRY_ID = keccak256( abi.encodePacked("DoubleSigningSlasher") ); bytes32 constant ELECTION_REGISTRY_ID = keccak256(abi.encodePacked("Election")); bytes32 constant EXCHANGE_REGISTRY_ID = keccak256(abi.encodePacked("Exchange")); bytes32 constant FEE_CURRENCY_WHITELIST_REGISTRY_ID = keccak256( abi.encodePacked("FeeCurrencyWhitelist") ); bytes32 constant FREEZER_REGISTRY_ID = keccak256(abi.encodePacked("Freezer")); bytes32 constant GOLD_TOKEN_REGISTRY_ID = keccak256(abi.encodePacked("GoldToken")); bytes32 constant GOVERNANCE_REGISTRY_ID = keccak256(abi.encodePacked("Governance")); bytes32 constant GOVERNANCE_SLASHER_REGISTRY_ID = keccak256( abi.encodePacked("GovernanceSlasher") ); bytes32 constant LOCKED_GOLD_REGISTRY_ID = keccak256(abi.encodePacked("LockedGold")); bytes32 constant RESERVE_REGISTRY_ID = keccak256(abi.encodePacked("Reserve")); bytes32 constant RANDOM_REGISTRY_ID = keccak256(abi.encodePacked("Random")); bytes32 constant SORTED_ORACLES_REGISTRY_ID = keccak256(abi.encodePacked("SortedOracles")); bytes32 constant STABLE_TOKEN_REGISTRY_ID = keccak256(abi.encodePacked("StableToken")); bytes32 constant VALIDATORS_REGISTRY_ID = keccak256(abi.encodePacked("Validators")); // solhint-enable state-visibility IRegistry public registry; modifier onlyRegisteredContract(bytes32 identifierHash) { require(registry.getAddressForOrDie(identifierHash) == msg.sender, "only registered contract"); _; } modifier onlyRegisteredContracts(bytes32[] memory identifierHashes) { require(registry.isOneOf(identifierHashes, msg.sender), "only registered contracts"); _; } /** * @notice Updates the address pointing to a Registry contract. * @param registryAddress The address of a registry contract for routing to other contracts. */ function setRegistry(address registryAddress) public onlyOwner { require(registryAddress != address(0), "Cannot register the null address"); registry = IRegistry(registryAddress); emit RegistrySet(registryAddress); } function getAccounts() internal view returns (IAccounts) { return IAccounts(registry.getAddressForOrDie(ACCOUNTS_REGISTRY_ID)); } function getAttestations() internal view returns (IAttestations) { return IAttestations(registry.getAddressForOrDie(ATTESTATIONS_REGISTRY_ID)); } function getElection() internal view returns (IElection) { return IElection(registry.getAddressForOrDie(ELECTION_REGISTRY_ID)); } function getExchange() internal view returns (IExchange) { return IExchange(registry.getAddressForOrDie(EXCHANGE_REGISTRY_ID)); } function getFeeCurrencyWhitelistRegistry() internal view returns (IFeeCurrencyWhitelist) { return IFeeCurrencyWhitelist(registry.getAddressForOrDie(FEE_CURRENCY_WHITELIST_REGISTRY_ID)); } function getFreezer() internal view returns (IFreezer) { return IFreezer(registry.getAddressForOrDie(FREEZER_REGISTRY_ID)); } function getGoldToken() internal view returns (IERC20) { return IERC20(registry.getAddressForOrDie(GOLD_TOKEN_REGISTRY_ID)); } function getGovernance() internal view returns (IGovernance) { return IGovernance(registry.getAddressForOrDie(GOVERNANCE_REGISTRY_ID)); } function getLockedGold() internal view returns (ILockedGold) { return ILockedGold(registry.getAddressForOrDie(LOCKED_GOLD_REGISTRY_ID)); } function getRandom() internal view returns (IRandom) { return IRandom(registry.getAddressForOrDie(RANDOM_REGISTRY_ID)); } function getReserve() internal view returns (IReserve) { return IReserve(registry.getAddressForOrDie(RESERVE_REGISTRY_ID)); } function getSortedOracles() internal view returns (ISortedOracles) { return ISortedOracles(registry.getAddressForOrDie(SORTED_ORACLES_REGISTRY_ID)); } function getStableToken() internal view returns (IStableToken) { return IStableToken(registry.getAddressForOrDie(STABLE_TOKEN_REGISTRY_ID)); } function getValidators() internal view returns (IValidators) { return IValidators(registry.getAddressForOrDie(VALIDATORS_REGISTRY_ID)); } }
IAccounts.sol
pragma solidity ^0.5.13; interface IAccounts { function isAccount(address) external view returns (bool); function voteSignerToAccount(address) external view returns (address); function validatorSignerToAccount(address) external view returns (address); function attestationSignerToAccount(address) external view returns (address); function signerToAccount(address) external view returns (address); function getAttestationSigner(address) external view returns (address); function getValidatorSigner(address) external view returns (address); function getVoteSigner(address) external view returns (address); function hasAuthorizedVoteSigner(address) external view returns (bool); function hasAuthorizedValidatorSigner(address) external view returns (bool); function hasAuthorizedAttestationSigner(address) external view returns (bool); function setAccountDataEncryptionKey(bytes calldata) external; function setMetadataURL(string calldata) external; function setName(string calldata) external; function setWalletAddress(address, uint8, bytes32, bytes32) external; function setAccount(string calldata, bytes calldata, address, uint8, bytes32, bytes32) external; function getDataEncryptionKey(address) external view returns (bytes memory); function getWalletAddress(address) external view returns (address); function getMetadataURL(address) external view returns (string memory); function batchGetMetadataURL(address[] calldata) external view returns (uint256[] memory, bytes memory); function getName(address) external view returns (string memory); function authorizeVoteSigner(address, uint8, bytes32, bytes32) external; function authorizeValidatorSigner(address, uint8, bytes32, bytes32) external; function authorizeValidatorSignerWithPublicKey(address, uint8, bytes32, bytes32, bytes calldata) external; function authorizeValidatorSignerWithKeys( address, uint8, bytes32, bytes32, bytes calldata, bytes calldata, bytes calldata ) external; function authorizeAttestationSigner(address, uint8, bytes32, bytes32) external; function createAccount() external returns (bool); }
ICeloVersionedContract.sol
pragma solidity ^0.5.13; interface ICeloVersionedContract { /** * @notice Returns the storage, major, minor, and patch version of the contract. * @return The storage, major, minor, and patch version of the contract. */ function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256); }
IFeeCurrencyWhitelist.sol
pragma solidity ^0.5.13; interface IFeeCurrencyWhitelist { function addToken(address) external; function getWhitelist() external view returns (address[] memory); }
IFreezer.sol
pragma solidity ^0.5.13; interface IFreezer { function isFrozen(address) external view returns (bool); }
IRegistry.sol
pragma solidity ^0.5.13; interface IRegistry { function setAddressFor(string calldata, address) external; function getAddressForOrDie(bytes32) external view returns (address); function getAddressFor(bytes32) external view returns (address); function getAddressForStringOrDie(string calldata identifier) external view returns (address); function getAddressForString(string calldata identifier) external view returns (address); function isOneOf(bytes32[] calldata, address) external view returns (bool); }
SlasherUtil.sol
pragma solidity ^0.5.13; import "openzeppelin-solidity/contracts/math/SafeMath.sol"; import "openzeppelin-solidity/contracts/ownership/Ownable.sol"; import "../common/Initializable.sol"; import "../common/UsingRegistry.sol"; import "../common/UsingPrecompiles.sol"; import "../common/interfaces/ICeloVersionedContract.sol"; contract SlasherUtil is Ownable, Initializable, UsingRegistry, UsingPrecompiles { using SafeMath for uint256; struct SlashingIncentives { // Value of LockedGold to slash from the account. uint256 penalty; // Value of LockedGold to send to the observer. uint256 reward; } SlashingIncentives public slashingIncentives; event SlashingIncentivesSet(uint256 penalty, uint256 reward); /** * @notice Sets initialized == true on implementation contracts * @param test Set to true to skip implementation initialization */ constructor(bool test) public Initializable(test) {} /** * @notice Sets slashing incentives. * @param penalty Penalty for the slashed signer. * @param reward Reward that the observer gets. */ function setSlashingIncentives(uint256 penalty, uint256 reward) public onlyOwner { require(penalty > reward, "Penalty has to be larger than reward"); slashingIncentives.penalty = penalty; slashingIncentives.reward = reward; emit SlashingIncentivesSet(penalty, reward); } /** * @notice Returns the group to be slashed. * @param validator Validator that was slashed. * @param blockNumber Block number associated with slashing. * @param groupMembershipHistoryIndex Index used for history lookup. * @return Group to be slashed. */ function groupMembershipAtBlock( address validator, uint256 blockNumber, uint256 groupMembershipHistoryIndex ) public view returns (address) { uint256 epoch = getEpochNumberOfBlock(blockNumber); require(epoch != 0, "Cannot slash on epoch 0"); // Use `epoch-1` because the elections were on that epoch return getValidators().groupMembershipInEpoch(validator, epoch.sub(1), groupMembershipHistoryIndex); } function performSlashing( address validator, address recipient, uint256 startBlock, uint256 groupMembershipHistoryIndex, address[] memory validatorElectionLessers, address[] memory validatorElectionGreaters, uint256[] memory validatorElectionIndices, address[] memory groupElectionLessers, address[] memory groupElectionGreaters, uint256[] memory groupElectionIndices ) internal { ILockedGold lockedGold = getLockedGold(); lockedGold.slash( validator, slashingIncentives.penalty, recipient, slashingIncentives.reward, validatorElectionLessers, validatorElectionGreaters, validatorElectionIndices ); address group = groupMembershipAtBlock(validator, startBlock, groupMembershipHistoryIndex); assert(group != address(0)); lockedGold.slash( group, slashingIncentives.penalty, recipient, slashingIncentives.reward, groupElectionLessers, groupElectionGreaters, groupElectionIndices ); IValidators validators = getValidators(); validators.forceDeaffiliateIfValidator(validator); validators.halveSlashingMultiplier(group); } }
IElection.sol
pragma solidity ^0.5.13; interface IElection { function electValidatorSigners() external view returns (address[] memory); function electNValidatorSigners(uint256, uint256) external view returns (address[] memory); function vote(address, uint256, address, address) external returns (bool); function activate(address) external returns (bool); function revokeActive(address, uint256, address, address, uint256) external returns (bool); function revokeAllActive(address, address, address, uint256) external returns (bool); function revokePending(address, uint256, address, address, uint256) external returns (bool); function markGroupIneligible(address) external; function markGroupEligible(address, address, address) external; function forceDecrementVotes( address, uint256, address[] calldata, address[] calldata, uint256[] calldata ) external returns (uint256); // view functions function getElectableValidators() external view returns (uint256, uint256); function getElectabilityThreshold() external view returns (uint256); function getNumVotesReceivable(address) external view returns (uint256); function getTotalVotes() external view returns (uint256); function getActiveVotes() external view returns (uint256); function getTotalVotesByAccount(address) external view returns (uint256); function getPendingVotesForGroupByAccount(address, address) external view returns (uint256); function getActiveVotesForGroupByAccount(address, address) external view returns (uint256); function getTotalVotesForGroupByAccount(address, address) external view returns (uint256); function getActiveVoteUnitsForGroupByAccount(address, address) external view returns (uint256); function getTotalVotesForGroup(address) external view returns (uint256); function getActiveVotesForGroup(address) external view returns (uint256); function getPendingVotesForGroup(address) external view returns (uint256); function getGroupEligibility(address) external view returns (bool); function getGroupEpochRewards(address, uint256, uint256[] calldata) external view returns (uint256); function getGroupsVotedForByAccount(address) external view returns (address[] memory); function getEligibleValidatorGroups() external view returns (address[] memory); function getTotalVotesForEligibleValidatorGroups() external view returns (address[] memory, uint256[] memory); function getCurrentValidatorSigners() external view returns (address[] memory); function canReceiveVotes(address, uint256) external view returns (bool); function hasActivatablePendingVotes(address, address) external view returns (bool); // only owner function setElectableValidators(uint256, uint256) external returns (bool); function setMaxNumGroupsVotedFor(uint256) external returns (bool); function setElectabilityThreshold(uint256) external returns (bool); // only VM function distributeEpochRewards(address, uint256, address, address) external; }
IGovernance.sol
pragma solidity ^0.5.13; interface IGovernance { function isVoting(address) external view returns (bool); }
ILockedGold.sol
pragma solidity ^0.5.13; interface ILockedGold { function incrementNonvotingAccountBalance(address, uint256) external; function decrementNonvotingAccountBalance(address, uint256) external; function getAccountTotalLockedGold(address) external view returns (uint256); function getTotalLockedGold() external view returns (uint256); function getPendingWithdrawals(address) external view returns (uint256[] memory, uint256[] memory); function getTotalPendingWithdrawals(address) external view returns (uint256); function lock() external payable; function unlock(uint256) external; function relock(uint256, uint256) external; function withdraw(uint256) external; function slash( address account, uint256 penalty, address reporter, uint256 reward, address[] calldata lessers, address[] calldata greaters, uint256[] calldata indices ) external; function isSlasher(address) external view returns (bool); }
IValidators.sol
pragma solidity ^0.5.13; interface IValidators { function registerValidator(bytes calldata, bytes calldata, bytes calldata) external returns (bool); function deregisterValidator(uint256) external returns (bool); function affiliate(address) external returns (bool); function deaffiliate() external returns (bool); function updateBlsPublicKey(bytes calldata, bytes calldata) external returns (bool); function registerValidatorGroup(uint256) external returns (bool); function deregisterValidatorGroup(uint256) external returns (bool); function addMember(address) external returns (bool); function addFirstMember(address, address, address) external returns (bool); function removeMember(address) external returns (bool); function reorderMember(address, address, address) external returns (bool); function updateCommission() external; function setNextCommissionUpdate(uint256) external; function resetSlashingMultiplier() external; // only owner function setCommissionUpdateDelay(uint256) external; function setMaxGroupSize(uint256) external returns (bool); function setMembershipHistoryLength(uint256) external returns (bool); function setValidatorScoreParameters(uint256, uint256) external returns (bool); function setGroupLockedGoldRequirements(uint256, uint256) external returns (bool); function setValidatorLockedGoldRequirements(uint256, uint256) external returns (bool); function setSlashingMultiplierResetPeriod(uint256) external; // view functions function getMaxGroupSize() external view returns (uint256); function getCommissionUpdateDelay() external view returns (uint256); function getValidatorScoreParameters() external view returns (uint256, uint256); function getMembershipHistory(address) external view returns (uint256[] memory, address[] memory, uint256, uint256); function calculateEpochScore(uint256) external view returns (uint256); function calculateGroupEpochScore(uint256[] calldata) external view returns (uint256); function getAccountLockedGoldRequirement(address) external view returns (uint256); function meetsAccountLockedGoldRequirements(address) external view returns (bool); function getValidatorBlsPublicKeyFromSigner(address) external view returns (bytes memory); function getValidator(address account) external view returns (bytes memory, bytes memory, address, uint256, address); function getValidatorGroup(address) external view returns (address[] memory, uint256, uint256, uint256, uint256[] memory, uint256, uint256); function getGroupNumMembers(address) external view returns (uint256); function getTopGroupValidators(address, uint256) external view returns (address[] memory); function getGroupsNumMembers(address[] calldata accounts) external view returns (uint256[] memory); function getNumRegisteredValidators() external view returns (uint256); function groupMembershipInEpoch(address, uint256, uint256) external view returns (address); // only registered contract function updateEcdsaPublicKey(address, address, bytes calldata) external returns (bool); function updatePublicKeys(address, address, bytes calldata, bytes calldata, bytes calldata) external returns (bool); function getValidatorLockedGoldRequirements() external view returns (uint256, uint256); function getGroupLockedGoldRequirements() external view returns (uint256, uint256); function getRegisteredValidators() external view returns (address[] memory); function getRegisteredValidatorSigners() external view returns (address[] memory); function getRegisteredValidatorGroups() external view returns (address[] memory); function isValidatorGroup(address) external view returns (bool); function isValidator(address) external view returns (bool); function getValidatorGroupSlashingMultiplier(address) external view returns (uint256); function getMembershipInLastEpoch(address) external view returns (address); function getMembershipInLastEpochFromSigner(address) external view returns (address); // only VM function updateValidatorScoreFromSigner(address, uint256) external; function distributeEpochPaymentsFromSigner(address, uint256) external returns (uint256); // only slasher function forceDeaffiliateIfValidator(address) external; function halveSlashingMultiplier(address) external; }
IAttestations.sol
pragma solidity ^0.5.13; interface IAttestations { function request(bytes32, uint256, address) external; function selectIssuers(bytes32) external; function complete(bytes32, uint8, bytes32, bytes32) external; function revoke(bytes32, uint256) external; function withdraw(address) external; function approveTransfer(bytes32, uint256, address, address, bool) external; // view functions function getUnselectedRequest(bytes32, address) external view returns (uint32, uint32, address); function getAttestationIssuers(bytes32, address) external view returns (address[] memory); function getAttestationStats(bytes32, address) external view returns (uint32, uint32); function batchGetAttestationStats(bytes32[] calldata) external view returns (uint256[] memory, address[] memory, uint64[] memory, uint64[] memory); function getAttestationState(bytes32, address, address) external view returns (uint8, uint32, address); function getCompletableAttestations(bytes32, address) external view returns (uint32[] memory, address[] memory, uint256[] memory, bytes memory); function getAttestationRequestFee(address) external view returns (uint256); function getMaxAttestations() external view returns (uint256); function validateAttestationCode(bytes32, address, uint8, bytes32, bytes32) external view returns (address); function lookupAccountsForIdentifier(bytes32) external view returns (address[] memory); function requireNAttestationsRequested(bytes32, address, uint32) external view; // only owner function setAttestationRequestFee(address, uint256) external; function setAttestationExpiryBlocks(uint256) external; function setSelectIssuersWaitBlocks(uint256) external; function setMaxAttestations(uint256) external; }
IRandom.sol
pragma solidity ^0.5.13; interface IRandom { function revealAndCommit(bytes32, bytes32, address) external; function randomnessBlockRetentionWindow() external view returns (uint256); function random() external view returns (bytes32); function getBlockRandomness(uint256) external view returns (bytes32); }
IExchange.sol
pragma solidity ^0.5.13; interface IExchange { function buy(uint256, uint256, bool) external returns (uint256); function sell(uint256, uint256, bool) external returns (uint256); function exchange(uint256, uint256, bool) external returns (uint256); function setUpdateFrequency(uint256) external; function getBuyTokenAmount(uint256, bool) external view returns (uint256); function getSellTokenAmount(uint256, bool) external view returns (uint256); function getBuyAndSellBuckets(bool) external view returns (uint256, uint256); }
IReserve.sol
pragma solidity ^0.5.13; interface IReserve { function setTobinTaxStalenessThreshold(uint256) external; function addToken(address) external returns (bool); function removeToken(address, uint256) external returns (bool); function transferGold(address payable, uint256) external returns (bool); function transferExchangeGold(address payable, uint256) external returns (bool); function getReserveGoldBalance() external view returns (uint256); function getUnfrozenReserveGoldBalance() external view returns (uint256); function getOrComputeTobinTax() external returns (uint256, uint256); function getTokens() external view returns (address[] memory); function getReserveRatio() external view returns (uint256); function addExchangeSpender(address) external; function removeExchangeSpender(address, uint256) external; function addSpender(address) external; function removeSpender(address) external; }
ISortedOracles.sol
pragma solidity ^0.5.13; interface ISortedOracles { function addOracle(address, address) external; function removeOracle(address, address, uint256) external; function report(address, uint256, address, address) external; function removeExpiredReports(address, uint256) external; function isOldestReportExpired(address token) external view returns (bool, address); function numRates(address) external view returns (uint256); function medianRate(address) external view returns (uint256, uint256); function numTimestamps(address) external view returns (uint256); function medianTimestamp(address) external view returns (uint256); }
IStableToken.sol
pragma solidity ^0.5.13; /** * @title This interface describes the functions specific to Celo Stable Tokens, and in the * absence of interface inheritance is intended as a companion to IERC20.sol and ICeloToken.sol. */ interface IStableToken { function mint(address, uint256) external returns (bool); function burn(uint256) external returns (bool); function setInflationParameters(uint256, uint256) external; function valueToUnits(uint256) external view returns (uint256); function unitsToValue(uint256) external view returns (uint256); function getInflationParameters() external view returns (uint256, uint256, uint256, uint256); // NOTE: duplicated with IERC20.sol, remove once interface inheritance is supported. function balanceOf(address) external view returns (uint256); }
Context.sol
pragma solidity ^0.5.0; /* * @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 GSN 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. */ contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
SafeMath.sol
pragma solidity ^0.5.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when 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. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }
Ownable.sol
pragma solidity ^0.5.0; import "../GSN/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. * * 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. */ 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 () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _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 onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = 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 onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
IERC20.sol
pragma solidity ^0.5.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. Does not include * the optional functions; to access them see {ERC20Detailed}. */ 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); }
Contract ABI
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nstant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"initialized","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isOwner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"minQuorumSize","inputs":[{"type":"uint256","name":"blockNumber","internalType":"uint256"}],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"minQuorumSizeInCurrentSet","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"numberValidatorsInCurrentSet","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"numberValidatorsInSet","inputs":[{"type":"uint256","name":"blockNumber","internalType":"uint256"}],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"contract IRegistry"}],"name":"registry","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"renounceOwnership","inputs":[],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setRegistry","inputs":[{"type":"address","name":"registryAddress","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setSlashingIncentives","inputs":[{"type":"uint256","name":"penalty","internalType":"uint256"},{"type":"uint256","name":"reward","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"slash","inputs":[{"type":"address","name":"signer","internalType":"address"},{"type":"uint256","name":"index","internalType":"uint256"},{"type":"bytes","name":"headerA","internalType":"bytes"},{"type":"bytes","name":"headerB","internalType":"bytes"},{"type":"uint256","name":"groupMembershipHistoryIndex","internalType":"uint256"},{"type":"address[]","name":"validatorElectionLessers","internalType":"address[]"},{"type":"address[]","name":"validatorElectionGreaters","internalType":"address[]"},{"type":"uint256[]","name":"validatorElectionIndices","internalType":"uint256[]"},{"type":"address[]","name":"groupElectionLessers","internalType":"address[]"},{"type":"address[]","name":"groupElectionGreaters","internalType":"address[]"},{"type":"uint256[]","name":"groupElectionIndices","internalType":"uint256[]"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"penalty","internalType":"uint256"},{"type":"uint256","name":"reward","internalType":"uint256"}],"name":"slashingIncentives","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"validatorSignerAddressFromCurrentSet","inputs":[{"type":"uint256","name":"index","internalType":"uint256"}],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"validatorSignerAddressFromSet","inputs":[{"type":"uint256","name":"index","internalType":"uint256"},{"type":"uint256","name":"blockNumber","internalType":"uint256"}],"constant":true}]
Contract Creation Code
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