Add random opcode using consensus hash

x/evm/keeper/state_transition.go

@@ -79,16 +79,21 @@ func (k *Keeper) NewEVM(
 	tracer vm.EVMLogger,
 	stateDB vm.StateDB,
 ) evm.EVM {
+	header := ctx.BlockHeader()
+	// Use EvidenceHash (parallel to MixDigest on Ethereum block)
+	random := common.BytesToHash(header.EvidenceHash)
+
 	blockCtx := vm.BlockContext{
 		CanTransfer: core.CanTransfer,
 		Transfer:    core.Transfer,
 		GetHash:     k.GetHashFn(ctx),
 		Coinbase:    cfg.CoinBase,
 		GasLimit:    ethermint.BlockGasLimit(ctx),
 		BlockNumber: big.NewInt(ctx.BlockHeight()),
-		Time:        big.NewInt(ctx.BlockHeader().Time.Unix()),
+		Time:        big.NewInt(header.Time.Unix()),
 		Difficulty:  big.NewInt(0), // unused. Only required in PoW context
 		BaseFee:     cfg.BaseFee,
+		Random:      &random,
 	}
 
 	txCtx := core.NewEVMTxContext(msg)