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lferrigno
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Jan 18, 2026
…rks (#5) Implement fork-specific gas cost handling for the SSTORE opcode across pre-merge Ethereum forks. This completes the core gas cost implementation for pre-merge fork support. Changes to gas_cost.rs: - Add pre-Istanbul SSTORE constants: SSTORE_GAS_SET (20000 for zero to non-zero), SSTORE_GAS_RESET (5000 for other changes), and SSTORE_REFUND_CLEAR (15000 for clearing slots) - Modify sstore() to accept fork parameter and use simple gas model for pre-Istanbul forks (no net gas metering) - Apply EIP-2929 cold/warm access costs only for Berlin and later Changes to stack_memory_storage_flow.rs: - Pass fork to gas_cost::sstore() function - Apply EIP-2200 stipend check only for Istanbul and later forks - Implement pre-Istanbul refund logic: 15000 gas refund for clearing storage (non-zero to zero) - Maintain EIP-2200 net gas metering refunds for Istanbul+ forks Gas cost history for SSTORE: - Frontier through Spurious Dragon: 20000 (set), 5000 (reset), 15000 refund - Istanbul: EIP-2200 net gas metering - Berlin+: EIP-2929 cold/warm access costs added
edg-l
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Feb 2, 2026
Per EIP-7928, coinbase must appear in BAL when there's a user transaction, even if the priority fee is zero. System contract calls have gas_price = 0, so we use this to distinguish them from user transactions.
This was referenced Feb 6, 2026
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Motivation
We want to have the minimal endpoints to connect to a consensus client