SIMD-0438
Safeguard for rent-exempt minimum increase
TL;DR
Protective feature to increase rent-exempt minimum balance back to the legacy value of `6960` per-byte. This should only be activated in response to excessive state growth observed on mainnet beta.
Summary
Protective feature to increase rent-exempt minimum balance back to the legacy value of `6960` per-byte. This should only be activated in response to excessive state growth observed on mainnet beta.
Motivation
Reducing rent without a built-in safeguard to respond to excessive state growth is inherently risky. This proposal is designed to provide a rent increase feature gate proactively so core developers can respond to issues more promptly.
Key Changes
- lamports_per_byte_year
- exemption_threshold = effective_size 6960
Impact
- New account creations and allocations will be subject to the increased rent value. SIMD-0392 maintains usability of existing accounts that are made sub-exempt after the rent increase.
Backwards Compatibility
SIMD-0392 grandfathers in existing accounts so they will continue to be valid after a rent increase.
Security Considerations
N/A