MELD Staking

MELD dynamic staking - Goals and processes

Key points and takeaways

All staking is linked to a node validating the MELD network.
Nodes total staked amount can be between 100k and 20M MELD tokens.
Rewards are calculated in epochs of 5 days. Only the liquidity staked during the full length of the epoch will get rewarded.
All staking positions get represented by NFTs.
Staking positions can be liquid or locked in different modular tiers, therefore increasing the weight of rewards distributed to them
Users need to delegate stake to an active node operator to generate rewards.
Nodes will have the capacity to set a delegator fee when they register their node.
Users can change the node they delegate to at any time.
Nodes can be slashed if they misbehave or go offline. Users that delegate to that node will also get slashed.

MELD staking has been designed as a fully modular and composable protocol that can be integrated in different ways by users and third party protocols. All code is open sourced and can be found here:

All updated addresses can be retrieved from the Address Provider contract deployed in the network.

Key flows to integrate the protocol in other apps:

Stake a new position

// Interact with MeldStakingDelegator.sol contract

/**
* @notice  Creates an staking position for a user, delegating to a node
* @dev     Manages total stake and rewards calculation. Further info can be found on docs* @param   _amount  Amount of MELD tokens to stake. Full decimals
* @param   _nodeId  Node ID to delegate to.
* @param   _lockTierId  Lock tier ID.
*/
function stake(
    uint256 _amount, 
    bytes32 _nodeId,
    uint256 _lockTierId
)

Withdraw a position

// Interact with MeldStakingDelegator.sol contract

/**
* @notice  A delegator redeems their Staking NFT withdrawing their stake and unclaimed rewards
* @dev     Can only be done by owner of NFT
* @dev     Can only be done by a delegator
* @dev     If the staking position is locked and the lock period has not ended, it will revert
* @param   _nftId  Staking position NFT ID to redeem
*/
function withdraw(uint256 _nftId)

Change delegation

// Interact with MeldStakingDelegator.sol contract

/**
* @notice  Changes the delegation of a staking position to a new node
* @dev     Adapts staking info and rewards for old and new node. Can only be done by owner of NFT
* @param   _nftId  Staking position NFT ID to change
* @param   _newNodeId  ID of the new node to delegate to
*/
function changeDelegation(
   uint256 _nftId,
   bytes32 _newNodeId
)

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// Interact with MeldStakingDelegator.sol contract /** * @notice Creates an staking position for a user, delegating to a node * @dev Manages total stake and rewards calculation. Further info can be found on docs* @param _amount Amount of MELD tokens to stake. Full decimals * @param _nodeId Node ID to delegate to. * @param _lockTierId Lock tier ID. */ function stake( uint256 _amount, bytes32 _nodeId, uint256 _lockTierId )

// Interact with MeldStakingDelegator.sol contract /** * @notice A delegator redeems their Staking NFT withdrawing their stake and unclaimed rewards * @dev Can only be done by owner of NFT * @dev Can only be done by a delegator * @dev If the staking position is locked and the lock period has not ended, it will revert * @param _nftId Staking position NFT ID to redeem */ function withdraw(uint256 _nftId)

// Interact with MeldStakingDelegator.sol contract /** * @notice Changes the delegation of a staking position to a new node * @dev Adapts staking info and rewards for old and new node. Can only be done by owner of NFT * @param _nftId Staking position NFT ID to change * @param _newNodeId ID of the new node to delegate to */ function changeDelegation( uint256 _nftId, bytes32 _newNodeId )