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cip-97.md

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CIP No. Title Author Status Type Created
97
Clear Staking Lists
Chenxing Li(@ChenxingLi)
Final
Spec Breaking
2022-06-13

Simple Summary

Remove account's staking lists.

Abstract

The staking lists of all accounts are removed in a lazy mode. After activating this CIP, when an account calls the withdraw interface of the staking internal contract with a non-zero amount for the first time, its staking list will be removed, and all the unsettled interest will be distributed to this account.

Motivation

Some PoS mining pools allow users to delegate tokens to their contracts and distribute rewards from participating PoS. However, the staking lists of PoS mining pool contracts keep growing. This makes the gas consumption of a single "deposit" or "withdraw" operation grow linearly and will exceed the maximum gas limit for a transaction. After Hydra hardfork, CIP-43 is activated, and no more interest will be generated from staking. It is meaningless to maintain such a staking list. So we should remove the staking list to resolve the gas consumption issue.

Specification

  1. After this CIP is activated, for the first time an account calling the withdraw interface of the staking internal contract with non-zero amount, Conflux will distribute all the unsettled interest.
  2. After the clearance of the staking list, the subsequent "deposit" and "withdraw" operations will not access the staking list.
  3. If an account makes a "deposit" operation before the clearance of its staking list, Conflux operations it as usual.

Gas Consumption

  1. The gas cost for withdraw interface of staking internal contract changes to 400 (SLOAD_GAS * 2).
  2. After the clearance of staking list, the gas cost for deposit interface of staking internal contract changes to 10000 (SSTORE_GAS * 2).

Rationale

TBA.

Backwards Compatibility

This change is spec breaking.

Test Cases

TBA.

Implementation

TBA.

Security Considerations

TBA.

Copyright

Copyright and related rights waived via CC0.