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Latest 25 from a total of 668 transactions
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Stake Rewards | 11950924 | 1230 days ago | IN | 0 ETH | 0.0044855 | ||||
Stake Rewards | 11808630 | 1252 days ago | IN | 0 ETH | 0.00788227 | ||||
Stake Rewards | 11771505 | 1257 days ago | IN | 0 ETH | 0.00465367 | ||||
Stake Rewards | 11767921 | 1258 days ago | IN | 0 ETH | 0.00642259 | ||||
Claim Rewards | 11764883 | 1258 days ago | IN | 0 ETH | 0.0068476 | ||||
Stake Rewards | 11763705 | 1258 days ago | IN | 0 ETH | 0.00325732 | ||||
Stake Rewards | 11763620 | 1258 days ago | IN | 0 ETH | 0.0029421 | ||||
Stake Rewards | 11762344 | 1259 days ago | IN | 0 ETH | 0.00308334 | ||||
Stake Rewards | 11762333 | 1259 days ago | IN | 0 ETH | 0.0023125 | ||||
Claim Rewards | 11762251 | 1259 days ago | IN | 0 ETH | 0.00534572 | ||||
Stake Rewards | 11761403 | 1259 days ago | IN | 0 ETH | 0.00451371 | ||||
Stake Rewards | 11761398 | 1259 days ago | IN | 0 ETH | 0.00451371 | ||||
Stake Rewards | 11761398 | 1259 days ago | IN | 0 ETH | 0.00451371 | ||||
Stake Rewards | 11760213 | 1259 days ago | IN | 0 ETH | 0.00890092 | ||||
Stake Rewards | 11759745 | 1259 days ago | IN | 0 ETH | 0.00409383 | ||||
Stake Rewards | 11759737 | 1259 days ago | IN | 0 ETH | 0.00440874 | ||||
Stake Rewards | 11759577 | 1259 days ago | IN | 0 ETH | 0.0037841 | ||||
Stake Rewards | 11759475 | 1259 days ago | IN | 0 ETH | 0.00770946 | ||||
Stake Rewards | 11759464 | 1259 days ago | IN | 0 ETH | 0.00374114 | ||||
Stake Rewards | 11759455 | 1259 days ago | IN | 0 ETH | 0.00377052 | ||||
Stake Rewards | 11759408 | 1259 days ago | IN | 0 ETH | 0.0070086 | ||||
Stake Rewards | 11758768 | 1259 days ago | IN | 0 ETH | 0.00496858 | ||||
Stake Rewards | 11758752 | 1259 days ago | IN | 0 ETH | 0.00458997 | ||||
Stake Rewards | 11758741 | 1259 days ago | IN | 0 ETH | 0.00602653 | ||||
Stake Rewards | 11758576 | 1259 days ago | IN | 0 ETH | 0.00700499 |
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Contract Name:
StakingRewards
Compiler Version
v0.6.12+commit.27d51765
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/math/Math.sol"; import "@openzeppelin/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; import "@bancor/token-governance/contracts/ITokenGovernance.sol"; import "@bancor/contracts/solidity/contracts/utility/ContractRegistryClient.sol"; import "@bancor/contracts/solidity/contracts/utility/Utils.sol"; import "@bancor/contracts/solidity/contracts/utility/Time.sol"; import "@bancor/contracts/solidity/contracts/utility/interfaces/ICheckpointStore.sol"; import "@bancor/contracts/solidity/contracts/liquidity-protection/interfaces/ILiquidityProtection.sol"; import "@bancor/contracts/solidity/contracts/liquidity-protection/interfaces/ILiquidityProtectionEventsSubscriber.sol"; import "./IStakingRewardsStore.sol"; /** * @dev This contract manages the distribution of the staking rewards */ contract StakingRewards is ILiquidityProtectionEventsSubscriber, AccessControl, Time, Utils, ContractRegistryClient { using SafeMath for uint256; using SafeERC20 for IERC20; // the role is used to globally govern the contract and its governing roles. bytes32 public constant ROLE_SUPERVISOR = keccak256("ROLE_SUPERVISOR"); // the roles is used to restrict who is allowed to publish liquidity protection events. bytes32 public constant ROLE_PUBLISHER = keccak256("ROLE_PUBLISHER"); uint32 private constant PPM_RESOLUTION = 1000000; // the weekly 25% increase of the rewards multiplier (in units of PPM). uint32 private constant MULTIPLIER_INCREMENT = PPM_RESOLUTION / 4; // the maximum weekly 200% rewards multiplier (in units of PPM). uint32 private constant MAX_MULTIPLIER = PPM_RESOLUTION + MULTIPLIER_INCREMENT * 4; // since we will be dividing by the total amount of protected tokens in units of wei, we can encounter cases // where the total amount in the denominator is higher than the product of the rewards rate and staking duration. In // order to avoid this imprecision, we will amplify the reward rate by the units amount. uint256 private constant REWARD_RATE_FACTOR = 1e18; uint256 private constant MAX_UINT256 = uint256(-1); // the staking rewards settings. IStakingRewardsStore private immutable _store; // the permissioned wrapper around the network token which should allow this contract to mint staking rewards. ITokenGovernance private immutable _networkTokenGovernance; // the address of the network token. IERC20 private immutable _networkToken; // the checkpoint store recording last protected position removal times. ICheckpointStore private immutable _lastRemoveTimes; /** * @dev triggered when pending rewards are being claimed * * @param provider the owner of the liquidity * @param amount the total rewards amount */ event RewardsClaimed(address indexed provider, uint256 amount); /** * @dev triggered when pending rewards are being staked in a pool * * @param provider the owner of the liquidity * @param poolToken the pool token representing the rewards pool * @param amount the reward amount * @param newId the ID of the new position */ event RewardsStaked(address indexed provider, IDSToken indexed poolToken, uint256 amount, uint256 indexed newId); /** * @dev initializes a new StakingRewards contract * * @param store the staking rewards store * @param networkTokenGovernance the permissioned wrapper around the network token * @param lastRemoveTimes the checkpoint store recording last protected position removal times * @param registry address of a contract registry contract */ constructor( IStakingRewardsStore store, ITokenGovernance networkTokenGovernance, ICheckpointStore lastRemoveTimes, IContractRegistry registry ) public validAddress(address(store)) validAddress(address(networkTokenGovernance)) validAddress(address(lastRemoveTimes)) ContractRegistryClient(registry) { _store = store; _networkTokenGovernance = networkTokenGovernance; _networkToken = networkTokenGovernance.token(); _lastRemoveTimes = lastRemoveTimes; // set up administrative roles. _setRoleAdmin(ROLE_SUPERVISOR, ROLE_SUPERVISOR); _setRoleAdmin(ROLE_PUBLISHER, ROLE_SUPERVISOR); // allow the deployer to initially govern the contract. _setupRole(ROLE_SUPERVISOR, _msgSender()); } modifier onlyPublisher() { _onlyPublisher(); _; } function _onlyPublisher() internal view { require(hasRole(ROLE_PUBLISHER, msg.sender), "ERR_ACCESS_DENIED"); } /** * @dev liquidity provision notification callback. The callback should be called *after* the liquidity is added in * the LP contract. * * @param provider the owner of the liquidity * @param poolAnchor the pool token representing the rewards pool * @param reserveToken the reserve token of the added liquidity */ function onAddingLiquidity( address provider, IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256, /* poolAmount */ uint256 /* reserveAmount */ ) external override onlyPublisher validExternalAddress(provider) { if (!_store.isReserveParticipating(IDSToken(address(poolAnchor)), reserveToken)) { return; } updateRewards(provider, IDSToken(address(poolAnchor)), reserveToken, liquidityProtectionStats()); } /** * @dev liquidity removal callback. The callback must be called *before* the liquidity is removed in the LP * contract * * @param provider the owner of the liquidity * @param poolAnchor the pool token representing the rewards pool * @param reserveToken the reserve token of the removed liquidity */ function onRemovingLiquidity( uint256, /* id */ address provider, IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256, /* poolAmount */ uint256 /* reserveAmount */ ) external override onlyPublisher validExternalAddress(provider) { if (!_store.isReserveParticipating(IDSToken(address(poolAnchor)), reserveToken)) { return; } ILiquidityProtectionStats lpStats = liquidityProtectionStats(); // make sure that all pending rewards are properly stored for future claims, with retroactive rewards // multipliers. storeRewards(provider, lpStats.providerPools(provider), lpStats); } /** * @dev returns the staking rewards store * * @return the staking rewards store */ function store() external view returns (IStakingRewardsStore) { return _store; } /** * @dev returns the network token governance * * @return the network token governance */ function networkTokenGovernance() external view returns (ITokenGovernance) { return _networkTokenGovernance; } /** * @dev returns the last remove times * * @return the last remove times */ function lastRemoveTimes() external view returns (ICheckpointStore) { return _lastRemoveTimes; } /** * @dev returns specific provider's pending rewards for all participating pools * * @param provider the owner of the liquidity * * @return all pending rewards */ function pendingRewards(address provider) external view returns (uint256) { return pendingRewards(provider, liquidityProtectionStats()); } /** * @dev returns specific provider's pending rewards for a specific participating pool/reserve * * @param provider the owner of the liquidity * @param poolToken the pool token representing the new rewards pool * @param reserveToken the reserve token representing the liquidity in the pool * * @return all pending rewards */ function pendingReserveRewards( address provider, IDSToken poolToken, IERC20Token reserveToken ) external view returns (uint256) { PoolProgram memory program = poolProgram(poolToken); return pendingRewards(provider, poolToken, reserveToken, program, liquidityProtectionStats()); } /** * @dev returns specific provider's pending rewards for all participating pools * * @param provider the owner of the liquidity * @param lpStats liquidity protection statistics store * * @return all pending rewards */ function pendingRewards( address provider, ILiquidityProtectionStats lpStats ) private view returns (uint256) { return pendingRewards(provider, lpStats.providerPools(provider), lpStats); } /** * @dev returns specific provider's pending rewards for a specific list of participating pools * * @param provider the owner of the liquidity * @param poolTokens the list of participating pools to query * @param lpStats liquidity protection statistics store * * @return all pending rewards */ function pendingRewards( address provider, IDSToken[] memory poolTokens, ILiquidityProtectionStats lpStats ) private view returns (uint256) { uint256 reward = 0; uint256 length = poolTokens.length; for (uint256 i = 0; i < length; ++i) { uint256 poolReward = pendingRewards(provider, poolTokens[i], lpStats); reward = reward.add(poolReward); } return reward; } /** * @dev returns specific provider's pending rewards for a specific pool * * @param provider the owner of the liquidity * @param poolToken the pool to query * @param lpStats liquidity protection statistics store * * @return reward all pending rewards */ function pendingRewards( address provider, IDSToken poolToken, ILiquidityProtectionStats lpStats ) private view returns (uint256) { uint256 reward = 0; PoolProgram memory program = poolProgram(poolToken); for (uint256 i = 0; i < program.reserveTokens.length; ++i) { uint256 reserveReward = pendingRewards(provider, poolToken, program.reserveTokens[i], program, lpStats); reward = reward.add(reserveReward); } return reward; } /** * @dev returns specific provider's pending rewards for a specific pool/reserve * * @param provider the owner of the liquidity * @param poolToken the pool to query * @param reserveToken the reserve token representing the liquidity in the pool * @param program the pool program info * @param lpStats liquidity protection statistics store * * @return reward all pending rewards */ function pendingRewards( address provider, IDSToken poolToken, IERC20Token reserveToken, PoolProgram memory program, ILiquidityProtectionStats lpStats ) private view returns (uint256) { // calculate the new reward rate per-token PoolRewards memory poolRewardsData = poolRewards(poolToken, reserveToken); // rewardPerToken must be calculated with the previous value of lastUpdateTime. poolRewardsData.rewardPerToken = rewardPerToken(poolToken, reserveToken, poolRewardsData, program, lpStats); poolRewardsData.lastUpdateTime = Math.min(time(), program.endTime); // update provider's rewards with the newly claimable base rewards and the new reward rate per-token. ProviderRewards memory providerRewards = providerRewards(provider, poolToken, reserveToken); // if this is the first liquidity provision - set the effective staking time to the current time. if ( providerRewards.effectiveStakingTime == 0 && lpStats.totalProviderAmount(provider, poolToken, reserveToken) == 0 ) { providerRewards.effectiveStakingTime = time(); } // pendingBaseRewards must be calculated with the previous value of providerRewards.rewardPerToken. providerRewards.pendingBaseRewards = providerRewards.pendingBaseRewards.add( baseRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats) ); providerRewards.rewardPerToken = poolRewardsData.rewardPerToken; // get full rewards and the respective rewards multiplier. (uint256 fullReward,) = fullRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats); return fullReward; } /** * @dev claims specific provider's pending rewards for all participating pools * * @param provider the owner of the liquidity * @param maxAmount an optional bound on the rewards to claim (when partial claiming is required) * @param lpStats liquidity protection statistics store * * @return all pending rewards */ function claimPendingRewards( address provider, uint256 maxAmount, ILiquidityProtectionStats lpStats ) private returns (uint256) { return claimPendingRewards(provider, lpStats.providerPools(provider), maxAmount, lpStats); } /** * @dev claims specific provider's pending rewards for a specific list of participating pools * * @param provider the owner of the liquidity * @param poolTokens the list of participating pools to query * @param maxAmount an optional bound on the rewards to claim (when partial claiming is required) * @param lpStats liquidity protection statistics store * * @return all pending rewards */ function claimPendingRewards( address provider, IDSToken[] memory poolTokens, uint256 maxAmount, ILiquidityProtectionStats lpStats ) private returns (uint256) { uint256 reward = 0; uint256 length = poolTokens.length; for (uint256 i = 0; i < length && maxAmount > 0; ++i) { uint256 poolReward = claimPendingRewards(provider, poolTokens[i], maxAmount, lpStats); reward = reward.add(poolReward); if (maxAmount != MAX_UINT256) { maxAmount = maxAmount.sub(poolReward); } } return reward; } /** * @dev claims specific provider's pending rewards for a specific pool * * @param provider the owner of the liquidity * @param poolToken the pool to query * @param maxAmount an optional bound on the rewards to claim (when partial claiming is required) * @param lpStats liquidity protection statistics store * * @return reward all pending rewards */ function claimPendingRewards( address provider, IDSToken poolToken, uint256 maxAmount, ILiquidityProtectionStats lpStats ) private returns (uint256) { uint256 reward = 0; PoolProgram memory program = poolProgram(poolToken); for (uint256 i = 0; i < program.reserveTokens.length && maxAmount > 0; ++i) { uint256 reserveReward = claimPendingRewards(provider, poolToken, program.reserveTokens[i], program, maxAmount, lpStats); reward = reward.add(reserveReward); if (maxAmount != MAX_UINT256) { maxAmount = maxAmount.sub(reserveReward); } } return reward; } /** * @dev claims specific provider's pending rewards for a specific pool/reserve * * @param provider the owner of the liquidity * @param poolToken the pool to query * @param reserveToken the reserve token representing the liquidity in the pool * @param program the pool program info * @param maxAmount an optional bound on the rewards to claim (when partial claiming is required) * @param lpStats liquidity protection statistics store * * @return reward all pending rewards */ function claimPendingRewards( address provider, IDSToken poolToken, IERC20Token reserveToken, PoolProgram memory program, uint256 maxAmount, ILiquidityProtectionStats lpStats ) private returns (uint256) { // update all provider's pending rewards, in order to apply retroactive reward multipliers. (PoolRewards memory poolRewardsData, ProviderRewards memory providerRewards) = updateRewards(provider, poolToken, reserveToken, lpStats); // get full rewards and the respective rewards multiplier. (uint256 fullReward, uint32 multiplier) = fullRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats); // mark any debt as repaid. providerRewards.baseRewardsDebt = 0; providerRewards.baseRewardsDebtMultiplier = 0; if (maxAmount != MAX_UINT256) { if (fullReward > maxAmount) { // get the amount of the actual base rewards that were claimed. if (multiplier == PPM_RESOLUTION) { providerRewards.baseRewardsDebt = fullReward.sub(maxAmount); } else { providerRewards.baseRewardsDebt = fullReward.sub(maxAmount).mul(PPM_RESOLUTION).div(multiplier); } // store the current multiplier for future retroactive rewards correction. providerRewards.baseRewardsDebtMultiplier = multiplier; // grant only maxAmount rewards. fullReward = maxAmount; maxAmount = 0; } else { maxAmount = maxAmount.sub(fullReward); } } // update pool rewards data total claimed rewards. _store.updatePoolRewardsData( poolToken, reserveToken, poolRewardsData.lastUpdateTime, poolRewardsData.rewardPerToken, poolRewardsData.totalClaimedRewards.add(fullReward) ); // update provider rewards data with the remaining pending rewards and set the effective staking time to the // timestamp of the current block. _store.updateProviderRewardsData( provider, poolToken, reserveToken, providerRewards.rewardPerToken, 0, providerRewards.totalClaimedRewards.add(fullReward), time(), providerRewards.baseRewardsDebt, providerRewards.baseRewardsDebtMultiplier ); return fullReward; } /** * @dev returns the current rewards multiplier for a provider in a given pool * * @param provider the owner of the liquidity * @param poolToken the pool to query * @param reserveToken the reserve token representing the liquidity in the pool * * @return rewards multiplier */ function rewardsMultiplier(address provider, IDSToken poolToken, IERC20Token reserveToken) external view returns (uint32) { ProviderRewards memory providerRewards = providerRewards(provider, poolToken, reserveToken); PoolProgram memory program = poolProgram(poolToken); return rewardsMultiplier(provider, providerRewards.effectiveStakingTime, program); } /** * @dev returns specific provider's total claimed rewards from all participating pools * * @param provider the owner of the liquidity * * @return total claimed rewards from all participating pools */ function totalClaimedRewards(address provider) external view returns (uint256) { uint256 totalRewards = 0; ILiquidityProtectionStats lpStats = liquidityProtectionStats(); IDSToken[] memory poolTokens = lpStats.providerPools(provider); for (uint256 i = 0; i < poolTokens.length; ++i) { IDSToken poolToken = poolTokens[i]; PoolProgram memory program = poolProgram(poolToken); for (uint256 j = 0; j < program.reserveTokens.length; ++j) { IERC20Token reserveToken = program.reserveTokens[j]; ProviderRewards memory providerRewards = providerRewards(provider, poolToken, reserveToken); totalRewards = totalRewards.add(providerRewards.totalClaimedRewards); } } return totalRewards; } /** * @dev claims pending rewards from all participating pools * * @return all claimed rewards */ function claimRewards() external returns (uint256) { return claimRewards(msg.sender, liquidityProtectionStats()); } /** * @dev claims specific provider's pending rewards from all participating pools * * @param provider the owner of the liquidity * @param lpStats liquidity protection statistics store * * @return all claimed rewards */ function claimRewards(address provider, ILiquidityProtectionStats lpStats) private returns (uint256) { return claimRewards(provider, lpStats.providerPools(provider), MAX_UINT256, lpStats); } /** * @dev claims specific provider's pending rewards for a specific list of participating pools * * @param provider the owner of the liquidity * @param poolTokens the list of participating pools to query * @param maxAmount an optional cap on the rewards to claim * @param lpStats liquidity protection statistics store * * @return all pending rewards */ function claimRewards( address provider, IDSToken[] memory poolTokens, uint256 maxAmount, ILiquidityProtectionStats lpStats ) private returns (uint256) { uint256 amount = claimPendingRewards(provider, poolTokens, maxAmount, lpStats); if (amount == 0) { return amount; } // make sure to update the last claim time so that it'll be taken into effect when calculating the next rewards // multiplier. _store.updateProviderLastClaimTime(provider); // mint the reward tokens directly to the provider. _networkTokenGovernance.mint(provider, amount); emit RewardsClaimed(provider, amount); return amount; } /** * @dev stakes specific pending rewards from all participating pools * * @param maxAmount an optional cap on the rewards to stake * @param poolToken the pool token representing the new rewards pool * @return all staked rewards and the ID of the new position */ function stakeRewards(uint256 maxAmount, IDSToken poolToken) external returns (uint256, uint256) { return stakeRewards(msg.sender, maxAmount, poolToken, liquidityProtectionStats()); } /** * @dev stakes specific provider's pending rewards from all participating pools * * @param provider the owner of the liquidity * @param maxAmount an optional cap on the rewards to stake * @param poolToken the pool token representing the new rewards pool * @param lpStats liquidity protection statistics store * * @return all staked rewards and the ID of the new position */ function stakeRewards( address provider, uint256 maxAmount, IDSToken poolToken, ILiquidityProtectionStats lpStats ) private returns (uint256, uint256) { return stakeRewards(provider, lpStats.providerPools(provider), maxAmount, poolToken, lpStats); } /** * @dev claims and stakes specific provider's pending rewards for a specific list of participating pools * * @param provider the owner of the liquidity * @param poolTokens the list of participating pools to query * @param newPoolToken the pool token representing the new rewards pool * @param maxAmount an optional cap on the rewards to stake * @param lpStats liquidity protection statistics store * * @return all staked rewards and the ID of the new position */ function stakeRewards( address provider, IDSToken[] memory poolTokens, uint256 maxAmount, IDSToken newPoolToken, ILiquidityProtectionStats lpStats ) private returns (uint256, uint256) { uint256 amount = claimPendingRewards(provider, poolTokens, maxAmount, lpStats); if (amount == 0) { return (amount, 0); } // approve the LiquidityProtection contract to pull the rewards. ILiquidityProtection liquidityProtection = liquidityProtection(); _networkToken.safeApprove(address(liquidityProtection), amount); // mint the reward tokens directly to the staking contract, so that the LiquidityProtection could pull the // rewards and attribute them to the provider. _networkTokenGovernance.mint(address(this), amount); uint256 newId = liquidityProtection.addLiquidityFor(provider, newPoolToken, IERC20Token(address(_networkToken)), amount); // please note, that in order to incentivize staking, we won't be updating the time of the last claim, thus // preserving the rewards bonus multiplier. emit RewardsStaked(provider, newPoolToken, amount, newId); return (amount, newId); } /** * @dev store specific provider's pending rewards for future claims * * @param provider the owner of the liquidity * @param poolTokens the list of participating pools to query * @param lpStats liquidity protection statistics store * */ function storeRewards( address provider, IDSToken[] memory poolTokens, ILiquidityProtectionStats lpStats ) private { uint256 length = poolTokens.length; for (uint256 i = 0; i < length; ++i) { storeRewards(provider, poolTokens[i], lpStats); } } /** * @dev store specific provider's pending rewards for future claims * * @param provider the owner of the liquidity * @param poolToken the list of participating pools to query * @param lpStats liquidity protection statistics store * */ function storeRewards( address provider, IDSToken poolToken, ILiquidityProtectionStats lpStats ) private { PoolProgram memory program = poolProgram(poolToken); for (uint256 i = 0; i < program.reserveTokens.length; ++i) { IERC20Token reserveToken = program.reserveTokens[i]; // update all provider's pending rewards, in order to apply retroactive reward multipliers. (PoolRewards memory poolRewardsData, ProviderRewards memory providerRewards) = updateRewards(provider, poolToken, reserveToken, lpStats); // get full rewards and the respective rewards multiplier. (uint256 fullReward, uint32 multiplier) = fullRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats); // get the amount of the actual base rewards that were claimed. if (multiplier == PPM_RESOLUTION) { providerRewards.baseRewardsDebt = fullReward; } else { providerRewards.baseRewardsDebt = fullReward.mul(PPM_RESOLUTION).div(multiplier); } // update store data with the store pending rewards and set the last update time to the timestamp of the // current block. _store.updateProviderRewardsData( provider, poolToken, reserveToken, providerRewards.rewardPerToken, 0, providerRewards.totalClaimedRewards, time(), providerRewards.baseRewardsDebt, multiplier ); } } /** * @dev updates pending rewards for a list of providers * * @param providers owners of the liquidity */ function updateRewards(address[] calldata providers) external { ILiquidityProtectionStats lpStats = liquidityProtectionStats(); uint256 length = providers.length; for (uint256 i = 0; i < length; ++i) { updateRewards(providers[i], lpStats); } } /** * @dev updates pending rewards for a specific of provider * * @param provider the owner of the liquidity * @param lpStats liquidity protection statistics store */ function updateRewards(address provider, ILiquidityProtectionStats lpStats) private { IDSToken[] memory poolTokens = lpStats.providerPools(provider); for (uint256 i = 0; i < poolTokens.length; ++i) { IDSToken poolToken = poolTokens[i]; PoolProgram memory program = poolProgram(poolToken); for (uint256 j = 0; j < program.reserveTokens.length; ++j) { IERC20Token reserveToken = program.reserveTokens[j]; updateRewards(provider, poolToken, reserveToken, lpStats); } } } /** * @dev returns the aggregated reward rate per-token * * @param poolToken the list of participating pools to query * @param reserveToken the reserve token representing the liquidity in the pool * @param poolRewardsData the rewards data of the pool * @param program the pool program info * @param lpStats liquidity protection statistics store * * @return the aggregated reward rate per-token */ function rewardPerToken( IDSToken poolToken, IERC20Token reserveToken, PoolRewards memory poolRewardsData, PoolProgram memory program, ILiquidityProtectionStats lpStats ) internal view returns (uint256) { // if there is no longer any liquidity in this reserve, return the historic rate (i.e., rewards won't accrue). uint256 totalReserveAmount = lpStats.totalReserveAmount(poolToken, reserveToken); if (totalReserveAmount == 0) { return poolRewardsData.rewardPerToken; } // don't grant any rewards before the starting time of the program. uint256 currentTime = time(); if (currentTime < program.startTime) { return 0; } uint256 stakingEndTime = Math.min(currentTime, program.endTime); uint256 stakingStartTime = Math.max(program.startTime, poolRewardsData.lastUpdateTime); // since we will be dividing by the total amount of protected tokens in units of wei, we can encounter cases // where the total amount in the denominator is higher than the product of the rewards rate and staking duration. // in order to avoid this imprecision, we will amplify the reward rate by the units amount. return poolRewardsData.rewardPerToken.add( // the aggregated reward rate stakingEndTime .sub(stakingStartTime) // the duration of the staking .mul(program.rewardRate) // multiplied by the rate .mul(REWARD_RATE_FACTOR) // and factored to increase precision .mul(rewardShare(reserveToken, program)) // and applied the specific token share of the whole reward .div(totalReserveAmount.mul(PPM_RESOLUTION)) // and divided by the total protected tokens amount in the pool ); } /** * @dev returns the base rewards since the last claim * * @param provider the owner of the liquidity * @param poolToken the list of participating pools to query * @param reserveToken the reserve token representing the liquidity in the pool * @param poolRewardsData the rewards data of the pool * @param providerRewards the rewards data of the provider * @param program the pool program info * @param lpStats liquidity protection statistics store * * @return the base rewards since the last claim */ function baseRewards( address provider, IDSToken poolToken, IERC20Token reserveToken, PoolRewards memory poolRewardsData, ProviderRewards memory providerRewards, PoolProgram memory program, ILiquidityProtectionStats lpStats ) internal view returns (uint256) { uint256 totalProviderAmount = lpStats.totalProviderAmount(provider, poolToken, reserveToken); uint256 newRewardPerToken = rewardPerToken(poolToken, reserveToken, poolRewardsData, program, lpStats); return totalProviderAmount // the protected tokens amount held by the provider .mul(newRewardPerToken.sub(providerRewards.rewardPerToken)) // multiplied by the difference between the previous and the current rate .div(REWARD_RATE_FACTOR); // and factored back } /** * @dev returns the full rewards since the last claim * * @param provider the owner of the liquidity * @param poolToken the list of participating pools to query * @param reserveToken the reserve token representing the liquidity in the pool * @param poolRewardsData the rewards data of the pool * @param providerRewards the rewards data of the provider * @param program the pool program info * @param lpStats liquidity protection statistics store * * @return full rewards and the respective rewards multiplier */ function fullRewards( address provider, IDSToken poolToken, IERC20Token reserveToken, PoolRewards memory poolRewardsData, ProviderRewards memory providerRewards, PoolProgram memory program, ILiquidityProtectionStats lpStats ) internal view returns (uint256, uint32) { // calculate the claimable base rewards (since the last claim). uint256 newBaseRewards = baseRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats); // make sure that we aren't exceeding the reward rate for any reason. verifyBaseReward(newBaseRewards, providerRewards.effectiveStakingTime, reserveToken, program); // calculate pending rewards and apply the rewards multiplier. uint32 multiplier = rewardsMultiplier(provider, providerRewards.effectiveStakingTime, program); uint256 fullReward = providerRewards.pendingBaseRewards.add(newBaseRewards); if (multiplier != PPM_RESOLUTION) { fullReward = fullReward.mul(multiplier).div(PPM_RESOLUTION); } // add any debt, while applying the best retractive multiplier. fullReward = fullReward.add( applyHigherMultiplier( providerRewards.baseRewardsDebt, multiplier, providerRewards.baseRewardsDebtMultiplier ) ); // make sure that we aren't exceeding the full reward rate for any reason. verifyFullReward(fullReward, reserveToken, poolRewardsData, program); return (fullReward, multiplier); } /** * @dev updates pool and provider rewards. this function is called during every liquidity changes * * @param provider the owner of the liquidity * @param poolToken the pool token representing the rewards pool * @param reserveToken the reserve token representing the liquidity in the pool * @param lpStats liquidity protection statistics store */ function updateRewards( address provider, IDSToken poolToken, IERC20Token reserveToken, ILiquidityProtectionStats lpStats ) private returns (PoolRewards memory, ProviderRewards memory) { PoolProgram memory program = poolProgram(poolToken); // calculate the new reward rate per-token and update it in the store. PoolRewards memory poolRewardsData = poolRewards(poolToken, reserveToken); // rewardPerToken must be calculated with the previous value of lastUpdateTime. poolRewardsData.rewardPerToken = rewardPerToken(poolToken, reserveToken, poolRewardsData, program, lpStats); poolRewardsData.lastUpdateTime = Math.min(time(), program.endTime); _store.updatePoolRewardsData( poolToken, reserveToken, poolRewardsData.lastUpdateTime, poolRewardsData.rewardPerToken, poolRewardsData.totalClaimedRewards ); // update provider's rewards with the newly claimable base rewards and the new reward rate per-token. ProviderRewards memory providerRewards = providerRewards(provider, poolToken, reserveToken); // if this is the first liquidity provision - set the effective staking time to the current time. if ( providerRewards.effectiveStakingTime == 0 && lpStats.totalProviderAmount(provider, poolToken, reserveToken) == 0 ) { providerRewards.effectiveStakingTime = time(); } // pendingBaseRewards must be calculated with the previous value of providerRewards.rewardPerToken. providerRewards.pendingBaseRewards = providerRewards.pendingBaseRewards.add( baseRewards(provider, poolToken, reserveToken, poolRewardsData, providerRewards, program, lpStats) ); providerRewards.rewardPerToken = poolRewardsData.rewardPerToken; _store.updateProviderRewardsData( provider, poolToken, reserveToken, providerRewards.rewardPerToken, providerRewards.pendingBaseRewards, providerRewards.totalClaimedRewards, providerRewards.effectiveStakingTime, providerRewards.baseRewardsDebt, providerRewards.baseRewardsDebtMultiplier ); return (poolRewardsData, providerRewards); } /** * @dev returns the specific reserve token's share of all rewards * * @param reserveToken the reserve token representing the liquidity in the pool * @param program the pool program info */ function rewardShare(IERC20Token reserveToken, PoolProgram memory program) private pure returns (uint32) { if (reserveToken == program.reserveTokens[0]) { return program.rewardShares[0]; } return program.rewardShares[1]; } /** * @dev returns the rewards multiplier for the specific provider * * @param provider the owner of the liquidity * @param stakingStartTime the staking time in the pool * @param program the pool program info * * @return the rewards multiplier for the specific provider */ function rewardsMultiplier( address provider, uint256 stakingStartTime, PoolProgram memory program ) private view returns (uint32) { uint256 effectiveStakingEndTime = Math.min(time(), program.endTime); uint256 effectiveStakingStartTime = Math.max( // take the latest of actual staking start time and the latest multiplier reset Math.max(stakingStartTime, program.startTime), // don't count staking before the start of the program Math.max(_lastRemoveTimes.checkpoint(provider), _store.providerLastClaimTime(provider)) // get the latest multiplier reset timestamp ); // check that the staking range is valid. for example, it can be invalid when calculating the multiplier when // the staking has started before the start of the program, in which case the effective staking start time will // be in the future, compared to the effective staking end time (which will be the time of the current block). if (effectiveStakingStartTime >= effectiveStakingEndTime) { return PPM_RESOLUTION; } uint256 effectiveStakingDuration = effectiveStakingEndTime.sub(effectiveStakingStartTime); // given x representing the staking duration (in seconds), the resulting multiplier (in PPM) is: // * for 0 <= x <= 1 weeks: 100% PPM // * for 1 <= x <= 2 weeks: 125% PPM // * for 2 <= x <= 3 weeks: 150% PPM // * for 3 <= x <= 4 weeks: 175% PPM // * for x > 4 weeks: 200% PPM return PPM_RESOLUTION + MULTIPLIER_INCREMENT * uint32(Math.min(effectiveStakingDuration.div(1 weeks), 4)); } /** * @dev returns the pool program for a specific pool * * @param poolToken the pool token representing the rewards pool * * @return the pool program for a specific pool */ function poolProgram(IDSToken poolToken) internal view returns (PoolProgram memory) { PoolProgram memory program; (program.startTime, program.endTime, program.rewardRate, program.reserveTokens, program.rewardShares) = _store .poolProgram(poolToken); return program; } /** * @dev returns pool rewards for a specific pool and reserve * * @param poolToken the pool token representing the rewards pool * @param reserveToken the reserve token representing the liquidity in the pool * * @return pool rewards for a specific pool and reserve */ function poolRewards(IDSToken poolToken, IERC20Token reserveToken) internal view returns (PoolRewards memory) { PoolRewards memory data; (data.lastUpdateTime, data.rewardPerToken, data.totalClaimedRewards) = _store.poolRewards( poolToken, reserveToken ); return data; } /** * @dev returns provider rewards for a specific pool and reserve * * @param provider the owner of the liquidity * @param poolToken the pool token representing the rewards pool * @param reserveToken the reserve token representing the liquidity in the pool * * @return provider rewards for a specific pool and reserve */ function providerRewards( address provider, IDSToken poolToken, IERC20Token reserveToken ) internal view returns (ProviderRewards memory) { ProviderRewards memory data; ( data.rewardPerToken, data.pendingBaseRewards, data.totalClaimedRewards, data.effectiveStakingTime, data.baseRewardsDebt, data.baseRewardsDebtMultiplier ) = _store.providerRewards(provider, poolToken, reserveToken); return data; } /** * @dev applies the best of two rewards multipliers on the provided amount * * @param amount the amount of the reward * @param multiplier1 the first multiplier * @param multiplier2 the second multiplier * * @return new reward amount */ function applyHigherMultiplier( uint256 amount, uint32 multiplier1, uint32 multiplier2 ) private pure returns (uint256) { uint256 bestMultiplier = Math.max(multiplier1, multiplier2); if (bestMultiplier == PPM_RESOLUTION) { return amount; } return amount.mul(bestMultiplier).div(PPM_RESOLUTION); } /** * @dev performs a sanity check on the newly claimable base rewards * * @param baseReward the base reward to check * @param stakingStartTime the staking time in the pool * @param reserveToken the reserve token representing the liquidity in the pool * @param program the pool program info */ function verifyBaseReward( uint256 baseReward, uint256 stakingStartTime, IERC20Token reserveToken, PoolProgram memory program ) private view { // don't grant any rewards before the starting time of the program or for stakes after the end of the program. uint256 currentTime = time(); if (currentTime < program.startTime || stakingStartTime >= program.endTime) { require(baseReward == 0, "ERR_BASE_REWARD_TOO_HIGH"); return; } uint256 effectiveStakingStartTime = Math.max(stakingStartTime, program.startTime); uint256 effectiveStakingEndTime = Math.min(currentTime, program.endTime); // make sure that we aren't exceeding the base reward rate for any reason. require( baseReward <= program .rewardRate .mul(effectiveStakingEndTime.sub(effectiveStakingStartTime)) .mul(rewardShare(reserveToken, program)) .div(PPM_RESOLUTION), "ERR_BASE_REWARD_RATE_TOO_HIGH" ); } /** * @dev performs a sanity check on the newly claimable full rewards * * @param fullReward the full reward to check * @param reserveToken the reserve token representing the liquidity in the pool * @param poolRewardsData the rewards data of the pool * @param program the pool program info */ function verifyFullReward( uint256 fullReward, IERC20Token reserveToken, PoolRewards memory poolRewardsData, PoolProgram memory program ) private pure { uint256 maxClaimableReward = ( program .rewardRate .mul(program.endTime.sub(program.startTime)) .mul(rewardShare(reserveToken, program)) .mul(MAX_MULTIPLIER) .div(PPM_RESOLUTION) .div(PPM_RESOLUTION) ) .sub(poolRewardsData.totalClaimedRewards); // make sure that we aren't exceeding the full reward rate for any reason. require(fullReward <= maxClaimableReward, "ERR_REWARD_RATE_TOO_HIGH"); } /** * @dev returns the liquidity protection stats data contract * * @return the liquidity protection store data contract */ function liquidityProtectionStats() internal view returns (ILiquidityProtectionStats) { return liquidityProtection().stats(); } /** * @dev returns the liquidity protection contract * * @return the liquidity protection contract */ function liquidityProtection() internal view returns (ILiquidityProtection) { return ILiquidityProtection(addressOf(LIQUIDITY_PROTECTION)); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@bancor/contracts/solidity/contracts/token/interfaces/IDSToken.sol"; import "@bancor/contracts/solidity/contracts/token/interfaces/IERC20Token.sol"; struct PoolProgram { uint256 startTime; uint256 endTime; uint256 rewardRate; IERC20Token[2] reserveTokens; uint32[2] rewardShares; } struct PoolRewards { uint256 lastUpdateTime; uint256 rewardPerToken; uint256 totalClaimedRewards; } struct ProviderRewards { uint256 rewardPerToken; uint256 pendingBaseRewards; uint256 totalClaimedRewards; uint256 effectiveStakingTime; uint256 baseRewardsDebt; uint32 baseRewardsDebtMultiplier; } interface IStakingRewardsStore { function isPoolParticipating(IDSToken poolToken) external view returns (bool); function isReserveParticipating(IDSToken poolToken, IERC20Token reserveToken) external view returns (bool); function addPoolProgram( IDSToken poolToken, IERC20Token[2] calldata reserveTokens, uint32[2] calldata rewardShares, uint256 endTime, uint256 rewardRate ) external; function removePoolProgram(IDSToken poolToken) external; function setPoolProgramEndTime(IDSToken poolToken, uint256 newEndTime) external; function poolProgram(IDSToken poolToken) external view returns ( uint256, uint256, uint256, IERC20Token[2] memory, uint32[2] memory ); function poolPrograms() external view returns ( IDSToken[] memory, uint256[] memory, uint256[] memory, uint256[] memory, IERC20Token[2][] memory, uint32[2][] memory ); function poolRewards(IDSToken poolToken, IERC20Token reserveToken) external view returns ( uint256, uint256, uint256 ); function updatePoolRewardsData( IDSToken poolToken, IERC20Token reserveToken, uint256 lastUpdateTime, uint256 rewardPerToken, uint256 totalClaimedRewards ) external; function providerRewards( address provider, IDSToken poolToken, IERC20Token reserveToken ) external view returns ( uint256, uint256, uint256, uint256, uint256, uint32 ); function updateProviderRewardsData( address provider, IDSToken poolToken, IERC20Token reserveToken, uint256 rewardPerToken, uint256 pendingBaseRewards, uint256 totalClaimedRewards, uint256 effectiveStakingTime, uint256 baseRewardsDebt, uint32 baseRewardsDebtMultiplier ) external; function updateProviderLastClaimTime(address provider) external; function providerLastClaimTime(address provider) external view returns (uint256); }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "../../utility/interfaces/IOwned.sol"; /* Converter Anchor interface */ interface IConverterAnchor is IOwned { }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "./ILiquidityProtectionStore.sol"; import "./ILiquidityProtectionStats.sol"; import "./ILiquidityProtectionSettings.sol"; import "../../token/interfaces/IERC20Token.sol"; import "../../converter/interfaces/IConverterAnchor.sol"; /* Liquidity Protection interface */ interface ILiquidityProtection { function store() external view returns (ILiquidityProtectionStore); function stats() external view returns (ILiquidityProtectionStats); function settings() external view returns (ILiquidityProtectionSettings); function addLiquidityFor( address owner, IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256 amount ) external payable returns (uint256); function addLiquidity( IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256 amount ) external payable returns (uint256); function removeLiquidity(uint256 id, uint32 portion) external; }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "../../converter/interfaces/IConverterAnchor.sol"; import "../../token/interfaces/IERC20Token.sol"; /** * @dev Liquidity protection events subscriber interface */ interface ILiquidityProtectionEventsSubscriber { function onAddingLiquidity( address provider, IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256 poolAmount, uint256 reserveAmount ) external; function onRemovingLiquidity( uint256 id, address provider, IConverterAnchor poolAnchor, IERC20Token reserveToken, uint256 poolAmount, uint256 reserveAmount ) external; }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "../../converter/interfaces/IConverterAnchor.sol"; /* Liquidity Protection Store Settings interface */ interface ILiquidityProtectionSettings { function addPoolToWhitelist(IConverterAnchor _poolAnchor) external; function removePoolFromWhitelist(IConverterAnchor _poolAnchor) external; function isPoolWhitelisted(IConverterAnchor _poolAnchor) external view returns (bool); function isPoolSupported(IConverterAnchor _poolAnchor) external view returns (bool); function minNetworkTokenLiquidityForMinting() external view returns (uint256); function defaultNetworkTokenMintingLimit() external view returns (uint256); function networkTokenMintingLimits(IConverterAnchor _poolAnchor) external view returns (uint256); function networkTokensMinted(IConverterAnchor _poolAnchor) external view returns (uint256); function incNetworkTokensMinted(IConverterAnchor _poolAnchor, uint256 _amount) external; function decNetworkTokensMinted(IConverterAnchor _poolAnchor, uint256 _amount) external; function minProtectionDelay() external view returns (uint256); function maxProtectionDelay() external view returns (uint256); function setProtectionDelays(uint256 _minProtectionDelay, uint256 _maxProtectionDelay) external; function minNetworkCompensation() external view returns (uint256); function setMinNetworkCompensation(uint256 _minCompensation) external; function lockDuration() external view returns (uint256); function setLockDuration(uint256 _lockDuration) external; function averageRateMaxDeviation() external view returns (uint32); function setAverageRateMaxDeviation(uint32 _averageRateMaxDeviation) external; }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "../../converter/interfaces/IConverterAnchor.sol"; import "../../token/interfaces/IDSToken.sol"; import "../../token/interfaces/IERC20Token.sol"; /* Liquidity Protection Stats interface */ interface ILiquidityProtectionStats { function increaseTotalAmounts( address provider, IDSToken poolToken, IERC20Token reserveToken, uint256 poolAmount, uint256 reserveAmount ) external; function decreaseTotalAmounts( address provider, IDSToken poolToken, IERC20Token reserveToken, uint256 poolAmount, uint256 reserveAmount ) external; function addProviderPool(address provider, IDSToken poolToken) external returns (bool); function removeProviderPool(address provider, IDSToken poolToken) external returns (bool); function totalPoolAmount(IDSToken poolToken) external view returns (uint256); function totalReserveAmount(IDSToken poolToken, IERC20Token reserveToken) external view returns (uint256); function totalProviderAmount( address provider, IDSToken poolToken, IERC20Token reserveToken ) external view returns (uint256); function providerPools(address provider) external view returns (IDSToken[] memory); }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "../../converter/interfaces/IConverterAnchor.sol"; import "../../token/interfaces/IDSToken.sol"; import "../../token/interfaces/IERC20Token.sol"; import "../../utility/interfaces/IOwned.sol"; /* Liquidity Protection Store interface */ interface ILiquidityProtectionStore is IOwned { function withdrawTokens( IERC20Token _token, address _to, uint256 _amount ) external; function protectedLiquidity(uint256 _id) external view returns ( address, IDSToken, IERC20Token, uint256, uint256, uint256, uint256, uint256 ); function addProtectedLiquidity( address _provider, IDSToken _poolToken, IERC20Token _reserveToken, uint256 _poolAmount, uint256 _reserveAmount, uint256 _reserveRateN, uint256 _reserveRateD, uint256 _timestamp ) external returns (uint256); function updateProtectedLiquidityAmounts( uint256 _id, uint256 _poolNewAmount, uint256 _reserveNewAmount ) external; function removeProtectedLiquidity(uint256 _id) external; function lockedBalance(address _provider, uint256 _index) external view returns (uint256, uint256); function lockedBalanceRange( address _provider, uint256 _startIndex, uint256 _endIndex ) external view returns (uint256[] memory, uint256[] memory); function addLockedBalance( address _provider, uint256 _reserveAmount, uint256 _expirationTime ) external returns (uint256); function removeLockedBalance(address _provider, uint256 _index) external; function systemBalance(IERC20Token _poolToken) external view returns (uint256); function incSystemBalance(IERC20Token _poolToken, uint256 _poolAmount) external; function decSystemBalance(IERC20Token _poolToken, uint256 _poolAmount) external; }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "./IERC20Token.sol"; import "../../converter/interfaces/IConverterAnchor.sol"; import "../../utility/interfaces/IOwned.sol"; /* DSToken interface */ interface IDSToken is IConverterAnchor, IERC20Token { function issue(address _to, uint256 _amount) external; function destroy(address _from, uint256 _amount) external; }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /* ERC20 Standard Token interface */ interface IERC20Token { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address _owner) external view returns (uint256); function allowance(address _owner, address _spender) external view returns (uint256); function transfer(address _to, uint256 _value) external returns (bool); function transferFrom( address _from, address _to, uint256 _value ) external returns (bool); function approve(address _spender, uint256 _value) external returns (bool); }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "./Owned.sol"; import "./Utils.sol"; import "./interfaces/IContractRegistry.sol"; /** * @dev This is the base contract for ContractRegistry clients. */ contract ContractRegistryClient is Owned, Utils { bytes32 internal constant CONTRACT_REGISTRY = "ContractRegistry"; bytes32 internal constant BANCOR_NETWORK = "BancorNetwork"; bytes32 internal constant BANCOR_FORMULA = "BancorFormula"; bytes32 internal constant CONVERTER_FACTORY = "ConverterFactory"; bytes32 internal constant CONVERSION_PATH_FINDER = "ConversionPathFinder"; bytes32 internal constant CONVERTER_UPGRADER = "BancorConverterUpgrader"; bytes32 internal constant CONVERTER_REGISTRY = "BancorConverterRegistry"; bytes32 internal constant CONVERTER_REGISTRY_DATA = "BancorConverterRegistryData"; bytes32 internal constant BNT_TOKEN = "BNTToken"; bytes32 internal constant BANCOR_X = "BancorX"; bytes32 internal constant BANCOR_X_UPGRADER = "BancorXUpgrader"; bytes32 internal constant LIQUIDITY_PROTECTION = "LiquidityProtection"; IContractRegistry public registry; // address of the current contract-registry IContractRegistry public prevRegistry; // address of the previous contract-registry bool public onlyOwnerCanUpdateRegistry; // only an owner can update the contract-registry /** * @dev verifies that the caller is mapped to the given contract name * * @param _contractName contract name */ modifier only(bytes32 _contractName) { _only(_contractName); _; } // error message binary size optimization function _only(bytes32 _contractName) internal view { require(msg.sender == addressOf(_contractName), "ERR_ACCESS_DENIED"); } /** * @dev initializes a new ContractRegistryClient instance * * @param _registry address of a contract-registry contract */ constructor(IContractRegistry _registry) internal validAddress(address(_registry)) { registry = IContractRegistry(_registry); prevRegistry = IContractRegistry(_registry); } /** * @dev updates to the new contract-registry */ function updateRegistry() public { // verify that this function is permitted require(msg.sender == owner || !onlyOwnerCanUpdateRegistry, "ERR_ACCESS_DENIED"); // get the new contract-registry IContractRegistry newRegistry = IContractRegistry(addressOf(CONTRACT_REGISTRY)); // verify that the new contract-registry is different and not zero require(newRegistry != registry && address(newRegistry) != address(0), "ERR_INVALID_REGISTRY"); // verify that the new contract-registry is pointing to a non-zero contract-registry require(newRegistry.addressOf(CONTRACT_REGISTRY) != address(0), "ERR_INVALID_REGISTRY"); // save a backup of the current contract-registry before replacing it prevRegistry = registry; // replace the current contract-registry with the new contract-registry registry = newRegistry; } /** * @dev restores the previous contract-registry */ function restoreRegistry() public ownerOnly { // restore the previous contract-registry registry = prevRegistry; } /** * @dev restricts the permission to update the contract-registry * * @param _onlyOwnerCanUpdateRegistry indicates whether or not permission is restricted to owner only */ function restrictRegistryUpdate(bool _onlyOwnerCanUpdateRegistry) public ownerOnly { // change the permission to update the contract-registry onlyOwnerCanUpdateRegistry = _onlyOwnerCanUpdateRegistry; } /** * @dev returns the address associated with the given contract name * * @param _contractName contract name * * @return contract address */ function addressOf(bytes32 _contractName) internal view returns (address) { return registry.addressOf(_contractName); } }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; import "./interfaces/IOwned.sol"; /** * @dev This contract provides support and utilities for contract ownership. */ contract Owned is IOwned { address public override owner; address public newOwner; /** * @dev triggered when the owner is updated * * @param _prevOwner previous owner * @param _newOwner new owner */ event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner); /** * @dev initializes a new Owned instance */ constructor() public { owner = msg.sender; } // allows execution by the owner only modifier ownerOnly { _ownerOnly(); _; } // error message binary size optimization function _ownerOnly() internal view { require(msg.sender == owner, "ERR_ACCESS_DENIED"); } /** * @dev allows transferring the contract ownership * the new owner still needs to accept the transfer * can only be called by the contract owner * * @param _newOwner new contract owner */ function transferOwnership(address _newOwner) public override ownerOnly { require(_newOwner != owner, "ERR_SAME_OWNER"); newOwner = _newOwner; } /** * @dev used by a new owner to accept an ownership transfer */ function acceptOwnership() public override { require(msg.sender == newOwner, "ERR_ACCESS_DENIED"); emit OwnerUpdate(owner, newOwner); owner = newOwner; newOwner = address(0); } }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /* Time implementing contract */ contract Time { /** * @dev returns the current time */ function time() internal view virtual returns (uint256) { return block.timestamp; } }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /** * @dev Utilities & Common Modifiers */ contract Utils { // verifies that a value is greater than zero modifier greaterThanZero(uint256 _value) { _greaterThanZero(_value); _; } // error message binary size optimization function _greaterThanZero(uint256 _value) internal pure { require(_value > 0, "ERR_ZERO_VALUE"); } // validates an address - currently only checks that it isn't null modifier validAddress(address _address) { _validAddress(_address); _; } // error message binary size optimization function _validAddress(address _address) internal pure { require(_address != address(0), "ERR_INVALID_ADDRESS"); } // verifies that the address is different than this contract address modifier notThis(address _address) { _notThis(_address); _; } // error message binary size optimization function _notThis(address _address) internal view { require(_address != address(this), "ERR_ADDRESS_IS_SELF"); } // validates an external address - currently only checks that it isn't null or this modifier validExternalAddress(address _address) { _validExternalAddress(_address); _; } // error message binary size optimization function _validExternalAddress(address _address) internal view { require(_address != address(0) && _address != address(this), "ERR_INVALID_EXTERNAL_ADDRESS"); } }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /** * @dev Checkpoint store contract interface */ interface ICheckpointStore { function addCheckpoint(address _address) external; function addPastCheckpoint(address _address, uint256 _time) external; function addPastCheckpoints(address[] calldata _addresses, uint256[] calldata _times) external; function checkpoint(address _address) external view returns (uint256); }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /* Contract Registry interface */ interface IContractRegistry { function addressOf(bytes32 _contractName) external view returns (address); }
// SPDX-License-Identifier: SEE LICENSE IN LICENSE pragma solidity 0.6.12; /* Owned contract interface */ interface IOwned { // this function isn't since the compiler emits automatically generated getter functions as external function owner() external view returns (address); function transferOwnership(address _newOwner) external; function acceptOwnership() external; }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /// @title Claimable contract interface interface IClaimable { function owner() external view returns (address); function transferOwnership(address newOwner) external; function acceptOwnership() external; }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "./IClaimable.sol"; /// @title Mintable Token interface interface IMintableToken is IERC20, IClaimable { function issue(address to, uint256 amount) external; function destroy(address from, uint256 amount) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./IMintableToken.sol"; /// @title The interface for mintable/burnable token governance. interface ITokenGovernance { // The address of the mintable ERC20 token. function token() external view returns (IMintableToken); /// @dev Mints new tokens. /// /// @param to Account to receive the new amount. /// @param amount Amount to increase the supply by. /// function mint(address to, uint256 amount) external; /// @dev Burns tokens from the caller. /// /// @param amount Amount to decrease the supply by. /// function burn(uint256 amount) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 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. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "../utils/EnumerableSet.sol"; import "../utils/Address.sol"; import "../GSN/Context.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @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. */ 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. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { 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. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 >=0.6.0 <0.8.0; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <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; // solhint-disable-next-line no-inline-assembly 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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "istanbul", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
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[{"inputs":[{"internalType":"contract IStakingRewardsStore","name":"store","type":"address"},{"internalType":"contract ITokenGovernance","name":"networkTokenGovernance","type":"address"},{"internalType":"contract ICheckpointStore","name":"lastRemoveTimes","type":"address"},{"internalType":"contract IContractRegistry","name":"registry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_prevOwner","type":"address"},{"indexed":true,"internalType":"address","name":"_newOwner","type":"address"}],"name":"OwnerUpdate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"provider","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"RewardsClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"provider","type":"address"},{"indexed":true,"internalType":"contract IDSToken","name":"poolToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"newId","type":"uint256"}],"name":"RewardsStaked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ROLE_PUBLISHER","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ROLE_SUPERVISOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastRemoveTimes","outputs":[{"internalType":"contract ICheckpointStore","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"networkTokenGovernance","outputs":[{"internalType":"contract ITokenGovernance","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"newOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"provider","type":"address"},{"internalType":"contract IConverterAnchor","name":"poolAnchor","type":"address"},{"internalType":"contract IERC20Token","name":"reserveToken","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"onAddingLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"provider","type":"address"},{"internalType":"contract IConverterAnchor","name":"poolAnchor","type":"address"},{"internalType":"contract IERC20Token","name":"reserveToken","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"onRemovingLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"onlyOwnerCanUpdateRegistry","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"provider","type":"address"},{"internalType":"contract IDSToken","name":"poolToken","type":"address"},{"internalType":"contract IERC20Token","name":"reserveToken","type":"address"}],"name":"pendingReserveRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"provider","type":"address"}],"name":"pendingRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"prevRegistry","outputs":[{"internalType":"contract IContractRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"registry","outputs":[{"internalType":"contract IContractRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"restoreRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_onlyOwnerCanUpdateRegistry","type":"bool"}],"name":"restrictRegistryUpdate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"provider","type":"address"},{"internalType":"contract IDSToken","name":"poolToken","type":"address"},{"internalType":"contract IERC20Token","name":"reserveToken","type":"address"}],"name":"rewardsMultiplier","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"maxAmount","type":"uint256"},{"internalType":"contract IDSToken","name":"poolToken","type":"address"}],"name":"stakeRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"store","outputs":[{"internalType":"contract IStakingRewardsStore","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"provider","type":"address"}],"name":"totalClaimedRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"providers","type":"address[]"}],"name":"updateRewards","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000891aff26593da95e574e3f62619dad6624fb5693000000000000000000000000a489c2b5b36835a327851ab917a80562b5afc244000000000000000000000000f8a2fb650e25a26ce839d64be8a0abbcb0b87b3200000000000000000000000052ae12abe5d8bd778bd5397f99ca900624cfadd4
-----Decoded View---------------
Arg [0] : store (address): 0x891AfF26593Da95e574E3f62619dAD6624FB5693
Arg [1] : networkTokenGovernance (address): 0xa489C2b5b36835A327851Ab917A80562B5AFC244
Arg [2] : lastRemoveTimes (address): 0xF8a2FB650e25a26CE839D64bE8a0aBbCb0b87B32
Arg [3] : registry (address): 0x52Ae12ABe5D8BD778BD5397F99cA900624CfADD4
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000891aff26593da95e574e3f62619dad6624fb5693
Arg [1] : 000000000000000000000000a489c2b5b36835a327851ab917a80562b5afc244
Arg [2] : 000000000000000000000000f8a2fb650e25a26ce839d64be8a0abbcb0b87b32
Arg [3] : 00000000000000000000000052ae12abe5d8bd778bd5397f99ca900624cfadd4
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Multichain Portfolio | 26 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.