Constants

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ERC-8421 (standard Alternative Mempool)

Name	Value	Description
MAX_VERIFY_GAS_PER_ENTITY	100_000	Maximum execution gas budget for a single unstaked or default-code entity’s validation frames.
MAX_VERIFY_GAS_STAKED_ENTITY	1_000_000	Maximum execution gas budget for a single staked entity’s validation frames.
MIN_UNSTAKE_DELAY	86400	One day. A withdrawal delay long enough to deter most Sybil attacks.
MIN_STAKE_VALUE	per chain	A non-trivial but not excessive amount, roughly USD 1000 in the native token.
SAME_NONCE_KEY_MEMPOOL_COUNT	4	Maximum pending transactions that select the same (sender, nonce key) pair.
SAME_SENDER_MEMPOOL_COUNT	64	Maximum pending transactions from one unstaked sender, regardless of how many nonce keys they select.
SAME_UNSTAKED_ENTITY_MEMPOOL_COUNT	10	Base number of pending transactions that may reference the same unstaked sponsoring payer.
THROTTLED_ENTITY_MEMPOOL_COUNT	4	Pending transactions allowed for a throttled entity.
THROTTLED_ENTITY_LIVE_BLOCKS	10	Blocks a transaction referencing a throttled entity may stay in the mempool.
THROTTLED_ENTITY_BLOCK_COUNT	4	Transactions referencing a throttled entity that a node may include in one block it builds.
MIN_INCLUSION_RATE_DENOMINATOR	10	Denominator in the reputation formula.
THROTTLING_SLACK	10	Lets an entity legitimately fail some transactions without being throttled.
BAN_SLACK	50	Lets a throttled entity fail some transactions without being banned.
MAX_TXS_ALLOWED_UNSTAKED_ENTITY	10000	Upper bound on included when computing the allowance of an unstaked sponsoring payer.
STAKING_REGISTRY_ADDRESS	per chain	Address of the Staking Registry contract.

The landing page shows validation gas budgets of 250,000 per unstaked entity and 2,500,000 per staked entity, and a minimal proof check of about 200,000 gas. These do not match the draft’s 100,000 and 1,000,000 (TBD).

EIP-8141 (canonical public mempool)

Name	Value	Description
MAX_VERIFY_GAS	100_000	Maximum gas a node should spend validating signatures and simulating the validation prefix.
MAX_VERIFY_STATE_GAS	500_000	Maximum state gas that may be budgeted across the validation prefix.
MAX_PENDING_TXS_USING_NON_CANONICAL_PAYMASTER	1	Maximum pending transactions using any given non-canonical paymaster.