Token Staking #11
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Token Staking #11
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A token staking contract for a specified standard ERC20 token. A holder of the specified token can stake its tokens to this contract and recover the stake after undelegation period is over.
Use ERC20 contracts and libraries to interact with staking token in staking contract.
Add function that stakes owner's tokens in the staking contract - tracks user's staked funds and emit `Staked` event. The minimum amount is required.
Add support for `approveAndCall`/`receiveApproval` pattern. The tBTC token contract that will be a staking token supports this pattern. To be able to stake in one transaction (instead of 2: approve + stake) we must implement the `RecieveApproval` interface. The token staking contract receives approval to spend tokens and create a stake for a given account.
Add min and max staking amount. Currently, functions that return these values have hardcoded values, but in the future we want to pull this param from "parameters" contract that stores governable params.
`account` -> `staker`
We should mint staking token eg. `stBTC` that represents staked token staked with Litmus. It will probably be a rebaseable ERC-20 token.
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We decided to implement the ERC-4626 standard (Tokenized Vaults) so we do not need a separate token staking contract. |
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Ref: #2
This PR creates the Token Staking contract - a contract for a specified standard ERC20 token. A holder of the specified token can stake its tokens to this contract and recover the stake after undelegation period is over. This contract also supports
approveAndCall/receiveApprovalpattern so users can stake in one transaction (instead of 2:Token.approve+TokenStaking.stake). The initial implementation of staking tracks the staked balance and transfers the staked amount to the staking contract.