random

Documentation

Index

• func GenerateNewRandomnessAndCommitment(header *types.Header, state vm.StateDB, db *ethdb.Database, seed []byte) (common.Hash, error)
• func GetLastRandomness(coinbase common.Address, db *ethdb.Database, header *types.Header, ...) (common.Hash, error)
• func IsRunning() bool
• func Random(header *types.Header, state vm.StateDB) (common.Hash, error)
• func RevealAndCommit(randomness, newCommitment common.Hash, proposer common.Address, ...) error

Functions

func GenerateNewRandomnessAndCommitment

func GenerateNewRandomnessAndCommitment(header *types.Header, state vm.StateDB, db *ethdb.Database, seed []byte) (common.Hash, error)

GenerateNewRandomnessAndCommitment generates a new random number and a corresponding commitment. The random number is stored in the database, keyed by the corresponding commitment.

func GetLastRandomness

func GetLastRandomness(coinbase common.Address, db *ethdb.Database, header *types.Header, state vm.StateDB, chain consensus.ChainReader, seed []byte) (common.Hash, error)

GetLastRandomness returns up the last randomness we committed to by first looking up our last commitment in the smart contract, and then finding the corresponding preimage in a (commitment => randomness) mapping we keep in the database.

func IsRunning

func IsRunning() bool

func Random

func Random(header *types.Header, state vm.StateDB) (common.Hash, error)

Random performs an internal call to the EVM to retrieve the current randomness from the official Random contract.

func RevealAndCommit

func RevealAndCommit(randomness, newCommitment common.Hash, proposer common.Address, header *types.Header, state vm.StateDB) error

RevealAndCommit performs an internal call to the EVM that reveals a proposer's previously committed to randomness, and commits new randomness for a future block.