GoodAaveStaking V2 (USDC)

Supporters / stakers can stake their USDC which is sent to permissionless protocols which earn interest. The FundManager has permissions to collect interest-earned from this contract.

Events

Staked

Emitted when staker stake value tokens of token.

Parameter name	Annotation
staker	The address of the staker.
token	The address of the staking token.
value	The value to be staked.

event Staked(address indexed staker, address token, uint256 value);

StakeWithdraw

Emitted when staker withdraws their stake value tokens of token.

Parameter name	Annotation
staker	The address of the staker.
token	The address of the staking token that beign withdrawn.
value	The value to be withdrawn.

event StakeWithdraw(address indexed staker, address token, uint256 value);

InterestCollected

Emitted when fundmanager transfers interest collected from DeFi protrocol.

Parameter name	Annotation
recipient	The recipient address of the interest
iTokenGains	The amount of intereset accrued.
tokenGains	The amount of interest worth in underlying token value.
actualTokenRedeemed	Actual token redeemed in Uniswap V2 (max 0.3% of liquidity) to token (in this case USDC).
actualRewardTokenEarned	Actual amount of reward tokens earned.
interestCollectedInDAI	The DAI amount of USDC tokens sent to the reserve as interest from converting token and optionally reward token in Uniswap V2.

event InterestCollected(
		address recipient,
		uint256 iTokenGains,
		uint256 tokenGains,
		uint256 actualTokenRedeemed,
		uint256 actualRewardTokenEarned,
		uint256 interestCollectedInDAI
	);

currentGains

Function that calculates current interest gains of this staking contract.

Parameter name	Annotation
_returnTokenBalanceInUSD	Determine return token balance of staking contract in USD.
_returnTokenGainsInUSD	Determine return token gains of staking contract in USD.

Return parameter name	Annotation
iTokenGains	Gains in iToken (in this case cUSDC).
tokenGains	Gains in token (in this case USDC).
tokenBalance	Total tokens locked.
balanceInUSD	Locked tokens worth in USD.
tokenGainsInUSD	Gains in USD.

function currentGains(
	bool _returnTokenBalanceInUSD,
	bool _returnTokenGainsInUSD
)
	public
	view
	override
	returns (
		uint256 iTokenGains,
		uint256 tokenGains,
		uint256 tokenBalance,
		uint256 balanceInUSD,
		uint256 tokenGainsInUSD
	);

stake

Allows a staker to deposit Tokens (in this case DAI). Notice that approve is needed to be executed before the execution of this method.

Parameter name	Annotation
_amount	The amount of Token (in this case USDC) or iToken (in this case cUSDC) to stake (it depends on _inInterestToken parameter).
_donationPer	The % of interest staker want to donate.
_inInterestToken	Specificy if stake in iToken (in this case cUSDC) or Token (in this case USDC).

Can be executed only when the contract is not paused.

function stake(
		uint256 _amount,
		uint256 _donationPer,
		bool _inInterestToken
	) external virtual;

withdrawStake

Withdraws the sender staked Token (in this case USDC).

Parameter name	Annotation
_amount	Amount to withdraw in Token (in this case USDC) or iToken (in this case cUSDC).
_inInterestToken	If true _amount is in iToken (in this case cUSDC) and also returned in iToken otherwise use Token (in this case USDC).

Can be executed only when the contract is not paused.

function withdrawStake(uint256 _amount, bool _inInterestToken) external virtual;

withdrawRewards

Withdraw staker G$ rewards + GDAO (GOOD) rewards to the caller (staker).

function withdrawRewards() external;

claimReputation

Withdraw staker GDAO (GOOD) rewards to the caller (staker).

function claimReputation() public;

collectUBIInterest

Collects gained interest (in G$) by fundmanager.

Parameter name	Annotation
_recipient	The recipient of iToken (in this case cUSDC) gains.

Return parameter name	Annotation
actualTokensRedeemed	Collected interest from token.
actualRewardTokenRedeemed	Collected interest from reward token.
actualDai	Total Token (in this case USDC amount equal to DAI amount) received from swapping token + reward token.

function collectUBIInterest(address _recipient)
		public
		virtual
		returns (
			uint256 actualTokenRedeemed,
			uint256 actualRewardTokenRedeemed,
			uint256 actualDai
		);

getTokenValueInUSD

The function is to calculate Token (in this case USDC) price in USD.

Parameter name	Annotation
_oracle	Chainlink oracle usd/token oralce.
_amount	Amount of Token to calculate worth of it.
_decimals	Decimals of Token.

Returns: worth of Tokens in USD, the decimals are 8.

function getTokenValueInUSD(
		address _oracle,
		uint256 _amount,
		uint256 _decimals
	) public view returns (uint256);

getUserMintedAndPending

The function that can provide information about minted and pending rewards in G$ of the _staker.

Parameter name	Annotation
_staker	Account to get rewards status for.

Returns: The first element of the tuple is Minted value and the second is Pending value in G$; 2 decimals.

function getUserMintedAndPending(address _staker)
		external
		view
		returns (uint256, uint256);

getGasCostForInterestTransfer

Function to get interest transfer cost for this particular staking contract.

Returns: Gas cost in wei.

function getGasCostForInterestTransfer()
		external
		view
		override
		returns (uint32);