56 lines
2.1 KiB
Solidity
56 lines
2.1 KiB
Solidity
pragma solidity ^0.5.17;
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// Interface for ERC900: https://eips.ethereum.org/EIPS/eip-900
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interface ERC900 {
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event Staked(address indexed user, uint256 amount, uint256 total, bytes data);
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event Unstaked(address indexed user, uint256 amount, uint256 total, bytes data);
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/**
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* @dev Stake a certain amount of tokens
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* @param _amount Amount of tokens to be staked
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* @param _data Optional data that can be used to add signalling information in more complex staking applications
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*/
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function stake(uint256 _amount, bytes calldata _data) external;
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/**
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* @dev Stake a certain amount of tokens in favor of someone
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* @param _user Address to stake an amount of tokens to
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* @param _amount Amount of tokens to be staked
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* @param _data Optional data that can be used to add signalling information in more complex staking applications
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*/
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function stakeFor(address _user, uint256 _amount, bytes calldata _data) external;
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/**
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* @dev Unstake a certain amount of tokens
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* @param _amount Amount of tokens to be unstaked
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* @param _data Optional data that can be used to add signalling information in more complex staking applications
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*/
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function unstake(uint256 _amount, bytes calldata _data) external;
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/**
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* @dev Tell the total amount of tokens staked for an address
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* @param _addr Address querying the total amount of tokens staked for
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* @return Total amount of tokens staked for an address
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*/
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function totalStakedFor(address _addr) external view returns (uint256);
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/**
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* @dev Tell the total amount of tokens staked
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* @return Total amount of tokens staked
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*/
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function totalStaked() external view returns (uint256);
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/**
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* @dev Tell the address of the token used for staking
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* @return Address of the token used for staking
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*/
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function token() external view returns (address);
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/*
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* @dev Tell if the current registry supports historic information or not
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* @return True if the optional history functions are implemented, false otherwise
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*/
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function supportsHistory() external pure returns (bool);
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}
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