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This is one of what you expect after The Merge

random with 0x44 OPCODE

Introduction

Solidity is not capable of creating random numbers. Don’t generate random numbers inside your contracts. It won’t work, you will get hacked. Create your own’s algorithm for random numbers by readings blockchain env as a source of random the random number is 100% predictable and blockchain env can be manipulated

Ethereum transition from Proof of Work to Proof of Stake consensus applications may benefit from using the randomness accumulated by the beacon chain. Thus, randomness outputs produced by the beacon chain should be accessible in the EVM.

Example Code

random opcode same as block.difficulty

It’s time for the testing

You can get a testing native token for paying the gas fee on https://faucet-sepolia.rockx.com/ and Sepolia RPC Endpoint

• Testing with Remix IDE

random value returned

• Testing with Ethers.js

from the result above on block.difficulty always returned zero but the result from a smart contract that calls opcode 0x44 which is RANDOM after network transition from Proof of Work to Proof of Stake consensus algorithm

Conclusion

• Security considerations randomness that’s provided is not 100% safe
  inputs that influence the randomness may be predictable and possible to be done in the centralized network
• Efficiency and convenience to create simply randomness for digital art or other use cases that not concern too much about the security side

Reading Further

EIP-4399: Supplant DIFFICULTY opcode with PREVRANDAO

go-ethereum/opcodes.go at e394d01f2a578765868355e98898bd17d3d076c1 · ethereum/go-ethereum

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