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Minimum ERC900 connectors in StakingEscrow 

This allows us to be interoperable with Aragon Aggregator
pull/1917/head
David Núñez 2020-04-21 06:06:12 +02:00
parent 91bc901020
commit b30e645c85
3 changed files with 27 additions and 3 deletions
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8
nucypher/blockchain/eth/sol/source/aragon/interfaces/IERC900History.sol Normal file
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@ -0,0 +1,8 @@
pragma solidity ^0.6.5;
// Minimum interface to interact with Aragon's Aggregator
interface IERC900History {
function totalStakedForAt(address addr, uint256 blockNumber) external view returns (uint256);
function totalStakedAt(uint256 blockNumber) external view returns (uint256);
function supportsHistory() external pure returns (bool);
}

19
nucypher/blockchain/eth/sol/source/contracts/StakingEscrow.sol
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@ -1,5 +1,6 @@
pragma solidity ^0.6.5;
import "aragon/interfaces/IERC900History.sol";
import "contracts/Issuer.sol";
import "contracts/lib/Bits.sol";
import "contracts/lib/Snapshot.sol";
@ -38,11 +39,12 @@ interface WorkLockInterface {
* Each staker that locks their tokens will receive some compensation
* @dev |v4.1.1|
*/
contract StakingEscrow is Issuer {
using SafeMath for uint256;
contract StakingEscrow is Issuer, IERC900History {
using AdditionalMath for uint256;
using AdditionalMath for uint16;
using Bits for uint256;
using SafeMath for uint256;
using Snapshot for uint128[];
event Deposited(address indexed staker, uint256 value, uint16 periods);
@ -1320,6 +1322,19 @@ contract StakingEscrow is Issuer {
endPeriod = downtime.endPeriod;
}
//------------------ ERC900 connectors ----------------------
function totalStakedForAt(address _owner, uint256 _blockNumber) external view override returns (uint256){
return stakerInfo[_owner].history.getValueAt(_blockNumber);
}
function totalStakedAt(uint256 _blockNumber) external view override returns (uint256){
return balanceHistory.getValueAt(_blockNumber);
}
function supportsHistory() public pure override returns (bool){
return true;
}
//------------------------Upgradeable------------------------
/**

3
setup.py
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@ -119,7 +119,8 @@ PACKAGE_DATA = ['network/templates/basic_status.j2',
'blockchain/eth/sol/source/zeppelin/utils/*',
'blockchain/eth/sol/source/zeppelin/ownership/*',
'blockchain/eth/sol/source/zeppelin/token/ERC20/*',
'blockchain/eth/sol/source/aragon/staking/*'
'blockchain/eth/sol/source/aragon/contracts/*',
'blockchain/eth/sol/source/aragon/interfaces/*',
]
setup(name=ABOUT['__title__'],