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EIP-4399 Supplant DIFFICULTY opcode with PREVRANDAO

FinalCorecreated 2021-10-30requires EIP-3675

Expose beacon chain randomness in the EVM by supplanting DIFFICULTY opcode semantics

Authors: Mikhail Kalinin (@mkalinin), Danny Ryan (@djrtwo)

Depends on (1)

Proposals this one names in its requires field.

EIP-3675Upgrade consensus to Proof-of-Stake

What the specification covers

AbstractMotivationSpecificationDefinitionsBlock structureEVMRenamingRationaleIncluding RANDAO output in the block headerUsing mixHash field instead of difficultyReusing existing field instead of appending a new oneReusing the DIFFICULTY opcode instead of introducing a new oneRenaming the field and the opcodeUsing TRANSITION_BLOCK rather than a block or slot numberUsing 264 threshold to determine PoS blocksBackwards CompatibilityTest CasesSecurity ConsiderationsBiasabilityPredictabilityTips for application developersCopyright

This proposal declares no Solidity interface, so there is nothing to compute. It may be a core protocol change, a meta proposal, or written in prose only.

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