Every tunable parameter that affects fees, throughput, user experience, or economic security. Parameters grouped by business impact and compared against peer Cosmos-EVM chains (Evmos, Kava, Cronos, Canto, Sei).

1. Fee Market (EIP-1559) Parameters

1.1 base_fee - Initial Base Fee

Attribute Value
Lumera default 0.0025 ulume/gas (~2.5 gwei equivalent)
Where set config/evm.go FeeMarketDefaultBaseFee
Governance changeable Yes

Peer comparison: Evmos 1 gwei, Kava 1 gwei, Cronos 5000 basecro/gas, Canto 1 gwei.

Recommendation: Review once token price is known. Current value likely fine for launch.

1.2 min_gas_price - Base Fee Floor

Lumera: 0.0005 ulume/gas (20% of base_fee). Never set to 0 - Canto showed zero-floor chains get spammed.

1.3 base_fee_change_denominator

Lumera: 16 (~6.25%/block) vs upstream 8 (~12.5%). Fees adjust twice as slowly. Pro: predictable fees. Con: slower spam pricing during spikes.

Recommendation: Consider 8 if expecting volatile demand. Keep 16 if fee stability is priority.

2. Block Gas Limit

Chain Block Gas Limit Block Time Effective Gas/sec
Lumera 25,000,000 ~5s ~5M gas/s
Ethereum 30,000,000 12s ~2.5M gas/s
Evmos 40,000,000 ~2s ~20M gas/s
Sei 100,000,000 0.4s ~250M gas/s

Recommendation: 25M appropriate for launch. Raise to 40M if avg utilization > 50%.

3. EVM Mempool Economics

Parameter Lumera geth Purpose
min-tip 0 wei - Min priority fee (per-node)
price-bump 10% 10% Replacement tx fee bump
account-slots 16 16 Executable tx slots per account
global-slots 5,120 5,120 Total executable slots
lifetime 3h 3h Queue eviction timeout

4. JSON-RPC Operational Limits

Parameter Default Public RPC Recommended
gas-cap 25,000,000 10,000,000
evm-timeout 5s 3s
logs-cap 10,000 2,000
block-range-cap 10,000 2,000
batch-request-limit 1,000 50-100
max-open-connections 0 (unlimited) 200
allow-unprotected-txs false MUST remain false

5. Rate Limiting (Public RPC)

Parameter Default Recommended
enable false true
requests-per-second 50 20-50
burst 100 50-100