Module handler 

Tempo EVM Handler implementation.

Structs

TempoEvmHandler

Tempo EVM [Handler] implementation with Tempo specific modifications:

ValidationContext

Context returned by TempoEvmHandler::validate_transaction with resolved fee token and key expiry information for use by the transaction pool.

Constants

EXPIRING_NONCE_GAS

Gas cost for expiring nonce transactions (replay check + insert).

KEYCHAIN_VALIDATION_GAS 🔒

Additional gas for Keychain signatures (key validation overhead: COLD_SLOAD_COST + 900 processing)

KEY_AUTH_BASE_GAS 🔒

Base gas for KeyAuthorization (22k storage + 5k buffer), signature gas added at runtime

KEY_AUTH_PER_LIMIT_GAS 🔒

Gas per spending limit in KeyAuthorization

P256_VERIFY_GAS 🔒

Additional gas for P256 signature verification P256 precompile cost (6900 from EIP-7951) + 1100 for 129 bytes extra signature size - ecrecover savings (3000)

Functions

calculate_aa_batch_intrinsic_gas

Calculates intrinsic gas for an AA transaction batch using revm helpers.

calculate_key_authorization_gas 🔒

Calculates the intrinsic gas cost for a KeyAuthorization.

call_scope_extra_gas 🔒

Charges the unpriced scope-helper bookkeeping for T4 key authorizations. The dynamic SSTORE rows are already counted by call_scope_storage_slots(). What remains is the helper work around them: clearing the empty scope tree for fresh keys, target/set maintenance, selector/set maintenance, and recipient-set writes. We use rounded constants here because the goal is to stop the undercharge without mirroring every storage helper exactly.

call_scope_storage_slots 🔒

Counts the scope storage rows that pay the dynamic SSTORE-set path for the active spec.

check_gas_limit 🔒

Checks if gas limit is sufficient and returns OOG frame result if not.

get_token_balance

IMPORTANT: the caller must ensure token is a valid TIP20Token address.

normalize_failed_batch_result_gas 🔒

Rewrites a failed batch step’s gas accounting to match whole-transaction semantics.

oog_frame_result 🔒

Helper function to create a frame result for an out of gas error.

primitive_signature_verification_gas 🔒

Calculates the gas cost for verifying a primitive signature.

tempo_signature_verification_gas 🔒

Calculates the gas cost for verifying an AA signature.

translate_allowed_calls_for_precompile 🔒

validate_aa_initial_tx_gas 🔒

Validates and calculates initial transaction gas for AA transactions.

validate_time_window

Validates time window for AA transactions