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Update decode_single/decode_pair to use branchless arithmetic per ethereum/EIPs#11306: modular add for single values, XOR for pairs. Extends EXCHANGE to support 2 additional swappable pairs (n up to 14).
Rename the EIP-7708 selfdestruct log event from `Selfdestruct(address,uint256)` to `Burn(address,uint256)` per EIP PR #11311. This updates the topic hash and makes the event name more generic for any future ETH burn mechanism.
Add spec-aware max_code_size (0x8000) and max_initcode_size (0x10000) defaults for AMSTERDAM+, falling back to EIP-170/EIP-3860 for earlier specs.
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Summary
Updates for Amsterdam devnet3 spec changes:
Selfdestructevent toBurn— updates the log topic hash tokeccak256("Burn(address,uint256)")and renames all related functions/variablesMAX_CODE_SIZEto 0x8000 (32KB) andMAX_INITCODE_SIZEto 0x10000 (64KB), replacing the previous EIP-7907 limitsTest plan
BURN_LOG_TOPIC