Abstract

This proposal drastically reduces the gas to add validators and distribute rewards for them. It does so by creating a single contract that can be used as the Ethereum withdrawal address for any number of validators. In addition, the contract will facilitate the application of node-level penalties, as opposed to the current state where penalties are assigned and processed at the minipool level.

Specification

• A Node Operator SHALL be able to deploy a single megapool contract
  • This MAY be combined with the deposit of their first validator
• A Node Operator SHALL be able to add a validator to their existing megapool contract
• A Node Operator SHALL be able to exit one or more validator in their megapool contract
• A Node Operator SHALL be able to distribute rewards from all validator in their megapool at once
  • This MAY be temporarily blocked while validators are exiting
• RPL MAY be staked to a megapool
  • Validators MAY be created within a megapool regardless of RPL staked to the megapool
• A user MAY set any amount of RPL "Staked" to a megapool to "Unstaking"
• Once RPL has been "Unstaking" for unstaking_period days, it can be withdrawn (this setting is defined in RPIP-30)
• All RPL that was "Unstaking" MUST be withdrawn at one time
• There SHALL only be a single time stored for "Unstaking" RPL; this means that if a user sets additional RPL to "Unstaking" after some RPL is already "Unstaking", they must wait for unstaking_period before any is available to withdraw
  • All RPL that was already "Unstaking" for unstaking_period SHOULD be withdrawn when a user sets additional RPL to "Unstaking"

Vote Eligibility

• All nodes are eligible to receive vote power.
• For nodes eligible to receive vote power, total RPL staked (to either a megapool or the node) SHALL contribute to vote power up to 150% of the value of total bonded ETH (from both megapools and legacy minipools).
  • Note that "Unstaking" RPL SHALL NOT be counted
  • If this RPIP is ratified, a note SHALL be added to the "Eligibility" section of RPIP-4 saying that it has been superceded by this section

Reference Implementation

See https://github.com/rocket-pool/rocketpool-research/blob/master/Megapools/megapools.md

Copyright

Copyright and related rights waived via CC0.

Citation

Valdorff, "RPIP-43: Megapools [DRAFT]," Rocket Pool Improvement Proposals, no. 43, March 2024. [Online serial]. Available: https://rpips.rocketpool.net/RPIPs/rpip-43.