core: Add touched address tracking to StateDB for tx filtering #601
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Arbitrum needs to track all addresses touched during transaction execution to support address-based filtering at the sequencer level. This enables compliance use cases where transactions interacting with certain addresses must be rejected before inclusion. The implementation follows the existing arbTxFilter pattern in ArbitrumExtraData, adding a touchedAddresses map that collects addresses during execution. Three methods are added to the StateDB interface: AddTouchedAddress, GetTouchedAddresses, and ClearTouchedAddresses. The collection is automatically cleared at transaction boundaries via SetTxContext.
Tristan-Wilson
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Tristan-Wilson
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Arbitrum needs to track all addresses touched during transaction execution to support address-based filtering at the sequencer level. This enables compliance use cases on certain chains where transactions interacting with certain addresses must be rejected before inclusion.
The implementation follows the existing arbTxFilter pattern in ArbitrumExtraData, adding a touchedAddresses map that collects addresses during execution. Three methods are added to the StateDB interface: AddTouchedAddress, GetTouchedAddresses, and ClearTouchedAddresses. The collection is automatically cleared at transaction boundaries via SetTxContext.
pulled in by OffchainLabs/nitro#4157
fixes: NIT-4221