ashishk74 / cryptomeda_staking

Cryptomeda Staking Ethereum Contracts

Cryptomeda Token Ethereum Contracts

ERC20 Token

We use a basic burnable ERC20 contract for Cryptomeda Network tokens. The contract implementations is directly based on the (https://github.com/OpenZeppelin/openzeppelin-contracts)implementation of ERC-20.

Cestaking

Cestaking is a flexible staking contract for ERC20 tokens.

It supports the following configuration:

• Constant guaranteed time based return. For example 10% return per month. Payout rewards are calculated based on mining time.
• Reward distribution after maturity. Staking contract can have a maturity date and a fixed reward amount which will be distributed between amounts that were not withdrawn until maturity time.
• Mix of above.
• Cap staking amount and time-boxed staking period.
• Prevent withdraw before a given withdraw start date.
• No compounded return. Returns are linearly distributed.

Cestaking Parameters

        address tokenAddress_,
        uint stakingStarts_,
        uint stakingEnds_,
        uint withdrawStarts_,
        uint withdrawEnds_,
        uint256 stakingCap_

Note, reward distribution period starts after stakingEnds.

Examples

To generate a hypothetical staking with 10% ARR return with a $ token:

stakingCap = $1000
stakingReward=$100;
earlyWithdrawReward=$100;
stakingStats = ...
stakingEnds = ...
withdrawStarts = stakingEnds
withdrawEnds = withdrawStarts + 1 year

To generate staking with minimum 5% ARR and minimum of 95%+ after maturity:

stakingCap = $1000
stakingReward=$1000;
earlyWithdrawReward=$50;
stakingStats = ...
stakingEnds = ...
withdrawStarts = stakingEnds
withdrawEnds = withdrawStarts + 1 year

To generate staking with 3 month maturity and 20% reward:

stakingCap = $1000
stakingReward=$300;
earlyWithdrawReward=$0;
stakingStats = ...
stakingEnds = ...
withdrawStarts = stakingEnds + 3 months
withdrawEnds = withdrawStarts + 3 months + 1 second

How to add contract to Etherscan.io

1. Paste the flatenned contract ABI JSON (from dist folder) to REMIX
2. Compile and deploy the contract (using REMIX or the dashboard). Take an exact note of the constructor arguments.
3. Go to https://abi.hashex.org/#, paste the ABI JSON, and fill up constructor arguments to get the ABI encoded data
4. In Etherscan, on the contract tab, select add source and verify. Then paste the flattened contract code, and ABI encoded constructor data obtaied at step 3.