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Update dBank.sol #6

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Update dBank.sol #6

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11 changes: 4 additions & 7 deletions src/contracts/dBank.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -41,13 +41,10 @@ contract dBank {
//check user's hodl time
uint depositTime = block.timestamp - depositStart[msg.sender];

//31668017 - interest(10% APY) per second for min. deposit amount (0.01 ETH), cuz:
//1e15(10% of 0.01 ETH) / 31577600 (seconds in 365.25 days)

//(etherBalanceOf[msg.sender] / 1e16) - calc. how much higher interest will be (based on deposit), e.g.:
//for min. deposit (0.01 ETH), (etherBalanceOf[msg.sender] / 1e16) = 1 (the same, 31668017/s)
//for deposit 0.02 ETH, (etherBalanceOf[msg.sender] / 1e16) = 2 (doubled, (2*31668017)/s)
uint interestPerSecond = 31668017 * (etherBalanceOf[msg.sender] / 1e16);
//calc interest per second
//seconds in a year = 60 * 60 * 24 * 365.25 = 31557600
//10% APY per second for 0.01 ETH(min deposit) = 0.01*1e18*0.1/31557600 = 31688088
uint interestPerSecond = 31688088 * (etherBalanceOf[msg.sender] / 1e16);
uint interest = interestPerSecond * depositTime;

//send funds to user
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