Mainnet

• December 2020-2021: https://etherscan.io/address/0xe52c3ea072b3388dfa272d3c32723b8c5a232d90
• January 2021-2022: https://etherscan.io/address/0x21a029a338005f0a8F3A2F4a0CFb7D7f91b56e65
• February 2021-2022: https://etherscan.io/address/0x98eaa281b5606a19c7f7ef966d5fb687bca360f4
• March 2021-2022: https://etherscan.io/address/0x126332e41655e313205e962cd0cb8041b2bdae2a
• April 2021-2022: https://etherscan.io/address/0x7d4735d924995ed437c413b69814ec49e904b81e
• May 2021-2022: https://etherscan.io/address/0xaded2aee9dabecbbcfc7abcf8cda03dd57e1f2af

Ropsten:

• https://ropsten.etherscan.io/address/0x7dfbf9d839e664cde859cabc6449fc904d4e8be0

Quick Start

yarn install
yarn test

Summary

This contract enables liquidityToken staking and rewards stakers with the underlying reserve token which needs to be stored in the contract before initialization.

From startTime to closeTime people can stake liquidityToken of the reserve token to earn rewardAmounts as configured with percentageYield calculated with the reserve amount the moment the liquidityToken is staked.

Once releaseTime is reached every staker can unstake their locked liquidityToken which is automatically unstaked together with the rewards the moment you unstake.

unstakeEarly is implemented to potentially migrate to Uniswap v3 in case it's released during the lockup.

Features

Init: Initialize Staking

Once rewards have been stored, allows you to initalize the staking contract with:

_startTime: Epoch timestamp when staking starts. _closeTime: Epoch timestamp when entering staking ends. _releaseTime: Epoch timestamp when staking can be released with rewards. _percentageYield: Percentage yield on your intially staked token, calculated based on liquidity token reserves of that token the moment you stake your liquidity. _rewardsAmount: Total amount of rewards available and required to be stored before initalization. _liquidityToken: Address of the liquidity token. _token: Address of the reward token (needs to be the liquidity reserve token too).

https://ropsten.etherscan.io/tx/0x755af4c537afd38f547b569bbe32dba9149340d0f1757982512761ee0537187a

If rewards haven't been stored upfront, staking will fail because every staking attempt would overflow rewardsAmount.

Stake: Stake liquidity tokens for token rewards

Requires you to have added liquidity to uniswap first:

https://ropsten.etherscan.io/tx/0x9d44c22a6b9615bcc465bce4f26466d9b844660e8b5e5892a03ffb7431bebf3e

Requires approval to deposit liquidity tokens within the staking contract:

https://ropsten.etherscan.io/tx/0xaedc9d104b998332fd27b9ef4ad8fbd4a3dd3dbc24978fb63d263c2bb7373fdc

Allows you to stake liquidity which assigns you rewards right away:

https://ropsten.etherscan.io/tx/0x26d5f4fd4180d82753e122a1f52daae287d8634f134f0826a978e5138327cc2f

Does not allow you to stake if staking hasn't started yet:

https://ropsten.etherscan.io/tx/0xc6172aa6aa8d580f6344be1fa0daa29ceeef1443abca0f550b267460ced6853e

Does not allow you to stake if staking has been closed already:

https://ropsten.etherscan.io/tx/0x9301a7c24274d50b7cfe305cc4729df00542c6e942f88385c03e7edace9ce606

Does not allow you to stake if staking rewards would overflow/overallocate:

https://ropsten.etherscan.io/tx/0xe81e8ed21c26fc649c600e82b5973126a68c5d86052fe1cc179df30968de3606

Withdraw: Roll-over unused reward tokens and accidently sent tokens

Allows to withdrawal unallocated reward tokens to roll them over to the next months staking contract:

https://ropsten.etherscan.io/tx/0x0ccc3b067f48ee3860ed1183acd7678346e69d0a24e65e46270496152f334c1d

Does not allow you to withdrawal allocated reward tokens:

https://ropsten.etherscan.io/tx/0x7af649af60b4585915f1d49c07e2daab9f18226d593b0f7ad8adb58d3331b1b0

Does not allow you to withdrawal any liquidity tokens as they always belong to the stakers:

https://ropsten.etherscan.io/tx/0x77e54ec05cbcd339309c862607ae07d4a804d67fc212f835df95f5b2948b13b2

Unstake: Unstake your liquidity and receive rewards

https://ropsten.etherscan.io/tx/0x252ad2aa83c968b0b4c9dc8c735574cf67a1ae3c2ca4fb02b31153ddd9d59cf0

Does not allow you to unstake if staking is not releasable yet.

https://ropsten.etherscan.io/tx/0xf64d19e655996762d2c74a82fe06c61c12d768169b033dd67c9bc44beb648076

Enable Unstake Early: Initiate liquidity migration to Uniswap v3

Allows to enable unstaking early to migrate to uniswap v3:

https://ropsten.etherscan.io/tx/0x7777e6b80dce93ebc99dcf9fa469d4ea4bcc3628e02185b8e13faaf5f2143ea9

Unstake Early: In order to migrate liquidity to Uniswap v3 together

Executing early unstake gives you back your liquidity token so that you can migrate it to v3 and stake it with us again:

https://ropsten.etherscan.io/tx/0xe4c29b8ced21e43d62b2ee5ed3072594d7d13487876d53efc6faa26506f841ab

Does not allow you to unstake early if not enabled (only if migrating to Uniswap v3):

https://ropsten.etherscan.io/tx/0x1cdf93420bbbc3fe642b06f17e209cdbe0729cc4631e1e02b0b6fbe1dbdd3687

Deploy

1. yarn flatten

2. Deploy flatten contract via https://remix.ethereum.org/